Cable connectors that reduce signal interference
Patent Information
- Authority / Receiving Office
- TW · TW
- Patent Type
- Patents
- Current Assignee / Owner
- 李政
- Filing Date
- 2024-12-19
- Publication Date
- 2026-08-01
AI Technical Summary
Conventional cable connectors suffer from long ground loop paths that slow down the reduction of ground impedance, leading to signal interference and rigidity issues, necessitating thicker ground wires which compromise flexibility.
A cable connector design featuring a first and second ground loop configuration, where the second loop is significantly shorter, utilizing a metal grounding spring to connect the printed circuit board directly to the housing, reducing ground impedance without increasing wire thickness or number.
The design achieves faster ground impedance reduction and improved flexibility by maintaining conductivity through a shorter ground loop, eliminating the need for thicker wires, thus reducing signal interference while maintaining cable flexibility.
Smart Images
Figure TWG2TB001903722_001 
Figure TWG2TB001903722_002 
Figure TWG2TB001903722_003
Abstract
Description
Cable connectors that reduce signal interference The present invention relates to a cable connector, in particular to a cable connector capable of reducing signal interference. In general electronic equipment, grounding is a crucial method for controlling interference. Properly combining grounding with the housing can resolve most interference issues. In electronic circuit design, the housing is primarily used as a ground connection, providing a potential reference point within the circuit. Grounding can also be considered a common return path for current (i.e., a ground loop). Conventional cable connector circuits include the following design considerations: (1) The braided ground wire on the outer periphery of the original cable (raw cable) and the separate bare ground wire inside the cable for auxiliary use are welded to the pads on the printed circuit board, and then connected to the shell through the welding pins inside the USB Type-C connector. The shell is welded to the metal clip at the rear end of the original cable, and the metal clip is wrapped around the braided ground wire of the original cable to form a ground loop. (2) If the ground wire is very thin, the ground potential will change with the change of current, causing the timing signal level of the electronic equipment to be unstable and the anti-noise performance to deteriorate. Therefore, users usually make the ground wire as thick as possible so that the ground wire can pass the allowable current on the printed circuit board. (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 the anti-noise ability. Therefore, when the cable only has a printed circuit board ground wire system composed of digital circuits, if the ground wire is formed into a closed loop, the potential difference will be reduced and the anti-noise ability of the electronic equipment will be improved. However, the ground loop path of the conventional cable connector is long, and the speed of reducing the ground impedance is slow. Furthermore, conventional cable connectors generally reduce signal interference by increasing the number or diameter of ground wires, but this results in the cable connector being too rigid and difficult to bend. The main purpose of the present invention is to provide a cable connector that can reduce signal interference, with a shorter ground loop path and a faster speed in reducing ground impedance. 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. To achieve the aforementioned objectives, the present invention provides a cable connector capable of reducing signal interference, comprising a housing, a printed circuit board (PCB), a metal grounding spring, a connector, a front cover, a metal wire clamp, and a cable. The PCB is disposed within the housing and has a plurality of first solder pads and a second solder pad. The first solder pads are located near a second end of the PCB, and the second solder pad is disposed between the first end of the PCB and the first solder pads. The metal grounding spring is soldered to the second solder pad and abuts against the inner sidewall of the housing. The connector is disposed at one end of the housing, protruding beyond the end, and has a plurality of pins soldered to the first end of the PCB. The front cover is disposed at one end of the housing and located within the housing. The metal wire clamp is disposed at the other end of the housing. One end of the cable passes through the other end of the housing and is disposed within the metal wire clamp. The metal wire clamp has a plurality of ground wires soldered to the first solder pads. In some embodiments, the metal grounding spring includes a positioning portion and a spring body, the positioning portion is disposed on the printed circuit board, and the spring body is welded to the second soldering pad and abuts against the inner sidewall of the metal shield. In some embodiments, the printed circuit board defines a positioning hole, and the positioning portion is disposed in the positioning hole. In some embodiments, the positioning hole passes through the second solder pad and the printed circuit board. In some embodiments, the second pad is close to one side of the printed circuit board. In some embodiments, the spring body is U-shaped. In some embodiments, 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 spring is against the inner side wall of the metal shield, the connector is disposed at a first end of the metal shield and protrudes beyond a first end of the outer shell, the metal wire clamp is disposed at a second end of the metal shield, and one end of the cable passes through a second end of the outer shell. In some embodiments, the cable connector further includes a front cover, which is disposed at the first end of the metal shield and located inside a first end of the housing. The utility of the present invention is that, in addition to providing the first ground loop in the prior art, the cable connector of the present invention can also provide a second ground loop that reduces ground impedance more quickly, thereby reducing signal interference. Furthermore, since the cable connector of the present invention can provide a second ground loop that reduces ground impedance faster, there is no need to increase the number or diameter of ground wires to achieve the effect of reducing signal interference, making the cable more flexible and easier to bend. The following is a more detailed description of the embodiments of the present invention with reference to the drawings and element symbols, so that those skilled in the art can implement the present invention accordingly after reading this specification. FIG1 is a perspective view of a cable connector capable of reducing signal interference according to the present invention. FIG2 is an exploded view of the cable connector capable of reducing signal interference according to the present invention. FIG3 is a cross-sectional view taken along line III-III of FIG1. FIG4 is a perspective view of the cable connector capable of reducing signal interference according to the present invention. As shown in FIG1 to FIG4 , the present invention provides a cable connector capable of reducing signal interference, comprising a housing 100, a printed circuit board 30, a metal grounding spring 40, a connector 50, a front cover 60, a metal wire clamp 70, and a cable 80. The printed circuit board 30 is disposed within the housing 100 and has a plurality of first solder pads 31 and a second solder pad 32. The first solder pads 31 are located near a second end 302 of the printed circuit board 30. The second solder pads 32 are disposed between a first end 301 of the printed circuit board 30 and the first solder pads 31. In other words, the second solder pads 32 are located closer to the first solder pads 31 than to the first end 301 of the printed circuit board 30. The metal grounding spring 40 is welded to the second solder pad 32 and abuts against the inner wall of the housing 100. The connector 50 is disposed at one end of the housing 100, protruding from the outside of the housing 100 and having a plurality of pins 51, which are welded 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 the housing 100. The metal wire clamp 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 and is disposed inside the metal wire clamp 70. The cable 80 has a plurality of ground wires 81, which are respectively welded to the first solder pads 31. The two grounding loops of the cable connector of the present invention will be further described below. The order of the first grounding loop is: (1) the ground wires 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 metal wire clamp 70; and (7) the braided ground wire inside the cable 80 (not shown). The order of the second grounding loop is: (1) the ground wires 81 of the cable 80; (2) the printed circuit board 30; (3) the metal grounding spring 40; (4) the side wall of the housing 100; (5) the metal wire clamp 70; and (6) the braided ground wire inside the cable 80 (not shown). Because the second solder pad 32 is located closer to the first solder pads 31, the distance between the ground wires 81 of the cable 80 and the metal grounding spring 40 is significantly shorter than the distance between the ground wires 81 of the cable 80 and the pins 51 of the connector 50. Compared to the path of the first ground loop, the second ground loop is significantly shorter, reducing ground impedance more quickly. Therefore, the cable connector of the present invention not only provides the first ground loop of conventional technology, but also provides a second ground loop that reduces ground impedance even more quickly, thereby reducing signal interference. Furthermore, since the cable connector of the present invention can provide a second ground loop that reduces ground impedance faster, there is no need to increase the number or diameter of ground wires 81 to reduce signal interference, making the cable 80 more flexible and easier to bend. In addition, the metal grounding spring 40 can always be kept in contact with the housing 100 by its elastic force, and thus can serve as a bridge structure directly connecting the housing 100 and the printed circuit board 30 to maintain the conductivity of the second grounding loop. As shown in Figures 2, 3, and 4, in a preferred embodiment, the metal grounding spring 40 includes a positioning portion 41 and a spring body 42. The positioning portion 41 is disposed on the printed circuit board 30, while the spring body 42 is soldered to the second solder pad 32 and abuts against the inner wall of the housing 100. Thus, the positioning portion 41 is securely fixed to the printed circuit board 30, preventing the metal grounding spring 40 from separating from the printed circuit board 30. Furthermore, the spring body 42 maintains contact with the housing 100 through its elastic force, thereby serving as a bridge structure directly connecting the housing 100 and the printed circuit board 30, maintaining the continuity of the second grounding loop. Preferably, the printed circuit board 30 defines a positioning hole 33, and the positioning portion 41 is disposed in the positioning hole 33. Thus, the positioning hole 33 can provide a good fixing effect for the positioning portion 41. As shown in Figures 2, 3, and 4, in a preferred embodiment, the second solder pad 32 is located close to one side of the printed circuit board 30. Therefore, the width of the spring body 42 does not need to be too wide to contact the housing 100. This reduces the volume of the metal grounding spring 40, lowers the manufacturing cost of the metal grounding spring 40, and also facilitates assembly. As shown in Figures 2 and 3 , in a preferred embodiment, the spring body 42 is U-shaped. Compared to other shapes, the U-shaped spring body 42 has better elasticity and can more closely contact the curved inner wall of the housing 100. As shown in FIG3 , in a preferred embodiment, the positioning hole 33 extends through the second solder pad 32 and the printed circuit board 30. Therefore, regardless of whether the positioning portion 41 is long and passes through the positioning hole 33 or short and is hidden in the positioning hole 33, the positioning portion 41 can be smoothly assembled in the positioning hole 33 without being affected by the length of the positioning portion 41. In a preferred embodiment, the metal grounding spring 40 is made of copper alloy or gold plating. Furthermore, materials such as copper alloy and gold plating have high conductivity, which helps reduce transmission impedance. However, the present invention is not limited thereto; any metal can be used as the material for the metal grounding spring 40 of the present invention. As shown in Figures 1 to 4, in a preferred embodiment, the housing 100 includes a shell 10 and a metal shield 20. The metal shield 20 is disposed inside the shell 10. The printed circuit board 30 is disposed inside the metal shield 20. The spring 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 a first end of the shell 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 shell 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 a second end 12 of the shell 10. The following further describes two grounding loops of a preferred embodiment of the cable connector of the present invention. The order of the first grounding loop is: (1) the ground wires 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 metal wire clamp 70; and (7) the braided ground wire inside the cable 80 (not shown). The order of the second grounding loop is: (1) the ground wires 81 of the cable 80; (2) the printed circuit board 30; (3) the metal grounding spring 40; (4) the side wall of the metal shield 20; (5) the metal wire clamp 70; and (6) the braided ground wire inside the cable 80 (not shown). In some embodiments, the outer shell 10 and the metal cover 20 of the housing 100 may be integrally formed. The above description is only used to explain the preferred embodiments of the present invention and is not intended to limit the present invention in any form. Therefore, any modifications or changes made to the present invention under the same inventive spirit should still be included in the scope of protection intended by the present invention. 10: Housing 11: First end 12: Second end 20: Metal shield 21: First end 22: Second end 30: Printed circuit board 301: First end 302: Second end 31: First solder pad 32: Second solder pad 33: Positioning hole 40: Metal grounding spring 41: Positioning portion 42: Spring body 50: Connector 51: Pin 60: Front cover 70: Metal wire clip 80: Cable 81: Ground wire 100: Housing FIG1 is a perspective view of a cable connector capable of reducing signal interference according to the present invention. FIG2 is an exploded view of a cable connector capable of reducing signal interference according to the present invention. FIG3 is a cross-sectional view taken along line III-III of FIG1. FIG4 is a perspective view of a cable connector capable of reducing signal interference according to the present invention. 10: Shell 20:Metal Mask 30: Printed Circuit Board 301: First End 31: First pad 32: Second pad 42: Shrapnel body 50: Connector 51: Pin 60:Front cover 70:Metal wire clip 80: Cable 81: Ground 100: Shell
Claims
1. A cable connector that reduces signal interference, comprising: A shell; A printed circuit board, disposed inside the housing, has a plurality of first solder pads and a second solder pad, the first solder pads being close to a second end of the printed circuit board, and the second solder pad being disposed between a first end of the printed circuit board and the first solder pads; a metal grounding spring, including a positioning portion and a spring body, the positioning portion being disposed on the printed circuit board, the spring body being soldered to the second solder pad and abutting against the inner sidewall of the housing; a connector, disposed at one end of the housing, protruding beyond the housing end, and having a plurality of pins, the pins being soldered to the first end of the printed circuit board; a metal wire clamp, 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 clamp, and has a plurality of ground wires, the ground wires being soldered to the first solder pads respectively.
2. The cable connector for reducing signal interference as described in claim 1, wherein, The printed circuit board has a positioning hole, and the positioning part is disposed in the positioning hole.
3. The cable connector for reducing signal interference as described in claim 2, wherein, The positioning hole extends through the second solder pad and the printed circuit board.
4. The cable connector for reducing signal interference as described in claim 1, wherein, The second solder pad is located near one side of the printed circuit board.
5. The cable connector for reducing signal interference as described in claim 1, wherein, The shrapnel itself is U-shaped.
6. The cable connector for reducing signal interference as described in 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 spring abuts against the inner sidewall of the metal shield. The connector is disposed at a first end of the metal shield and protrudes beyond a first end of the outer shell. The metal wire clamp is disposed at a second end of the metal shield. One end of the cable passes through a second end of the outer shell.
7. The cable connector for reducing signal interference as described in claim 6, further comprising a front cover disposed at the first end of the metal shield and located inside the first end of the housing.