Flat cable and grounding structure thereof

Abstract

The utility model provides a flat cable and a grounding structure thereof. The flat cable comprises an insulator, a plurality of cable cores, a shielding layer and a grounding piece. The plurality of wire cores are arranged at intervals and wrapped by the insulator, one end of each wire core protrudes out of one end of the insulator to form a plurality of pins, and the pins comprise at least one grounding pin and at least one signal pin. The shielding layer covers the insulator and exposes the pins. The grounding piece covers the pins and comprises a cover plate and at least one pin connected with the cover plate, and the pin corresponds to the grounding pin and is located on one side face of the cover plate. Furthermore, the grounding structure of the flat cable comprises the flat cable and a circuit board combined with the flat cable. The circuit board comprises at least one signal pad, at least one grounding pad and at least one grounding part, the at least one signal pin is conductively connected with the at least one signal pad, and the at least one grounding pin is conductively connected with the at least one grounding part.

Description

Technical Field

[0001] The utility model relates to a flexible cable structure, in particular to a flexible flat cable and its grounding structure. Background Art

[0002] In the existing flexible cable, a plurality of wire cores are arranged and coated in its insulating layer. And for signal transmission, in order to avoid being interfered by external signals, aluminum foil is usually further used as shielding.

[0003] Furthermore, when the flexible cable needs to be welded to the circuit board, it is necessary to strip the insulating layer and aluminum foil of the above flexible cable to expose the wire cores and then weld them to the circuit board. However, the exposed part will reduce the shielding effect and may affect the transmission performance of the flexible cable. In addition, although the aluminum foil of the flexible cable has a shielding effect, it does not form a conduction loop with the ground of the circuit board, and the suppression effect on electromagnetic interference (EMI) is limited during high-speed signal transmission. Summary of the Utility Model

[0004] One object of the utility model is to provide a flexible flat cable and its grounding structure, which shields the pins through the setting of a grounding component to reduce external crosstalk and noise, and can provide better electromagnetic compatibility for high-speed signals.

[0005] To achieve the above object, the utility model provides a flexible flat cable, which includes an insulator, a plurality of wire cores, a shielding layer and a grounding component. The plurality of wire cores are arranged at intervals and coated by the insulator. One end of the wire core protrudes from one end of the insulator to form a plurality of pins, and the pins include at least one grounding pin and at least one signal pin. The shielding layer is coated outside the insulator and exposes the pins. The grounding component covers the pins and includes a cover plate and at least one insertion pin connected to the cover plate. The insertion pin is arranged corresponding to the grounding pin and is located on one side surface of the cover plate.

[0006] To achieve the above object, the utility model provides a grounding structure of a flexible flat cable, which includes a flexible flat cable and a circuit board. The circuit board is combined with the flexible flat cable. The circuit board includes at least one signal pad, at least one grounding pad and at least one grounding portion. The at least one signal pin is conductively connected to the at least one signal pad, and the at least one grounding pin is conductively connected to the at least one grounding portion.

[0007] In an embodiment of the utility model, the flexible flat cable further includes a protective layer, the protective layer is coated outside the shielding layer, and the shielding layer is folded outward and stacked.

[0008] In an embodiment of the utility model, the number of the grounding pins, signal pins and insertion pins is multiple. The multiple grounding pins and multiple signal pins are arranged in parallel. Each insertion pin is arranged in an I shape and is perpendicular to the pins.

[0009] In an embodiment of the utility model, the cover plate is provided with a plurality of first welding holes.

[0010] In an embodiment of the present utility model, the grounding member includes a pair of fins disposed on opposite sides of the cover plate, and each fin is provided with a plurality of second welding holes.

[0011] In an embodiment of the present utility model, each pin is arranged in a Z shape and extends and is parallel to the pin.

[0012] In an embodiment of the present utility model, the ground portion is located on one side of the grounding pad, and the number of signal pads, grounding pads, and ground portions is set to be multiple corresponding to the number of grounding pins, signal pins, and pins.

[0013] In an embodiment of the present utility model, the circuit board further includes a conducting portion, and the conducting portion is located on one side of the signal pad and the grounding pad.

[0014] In an embodiment of the present utility model, the grounding portion is a jack or a conducting pad.

[0015] Compared with the prior art, when the flat cable of the present utility model is combined with the circuit board by fixing means such as welding, the signal pins of the grounding member conduct the signal pads, and the grounding pins conduct the grounding portion; accordingly, the flat cable can achieve the functions of signal transmission and grounding. Furthermore, the flat cable of the present utility model shields the exposed pins through the grounding member, thereby reducing the crosstalk and noise caused by external electronic devices to the flat cable, and can provide better electromagnetic compatibility (EMC) for high-speed signals, increasing the practicability of the flat cable of the present utility model when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional external view schematic diagram of one side direction of the grounding structure of the flat cable of the present utility model;

[0017] Figure 2 is a three-dimensional external view schematic diagram of the other side direction of the grounding structure of the flat cable of the present utility model;

[0018] Figure 3 is a partial three-dimensional external view schematic diagram of the grounding structure of the flat cable of the present utility model;

[0019] Figure 4 is a three-dimensional exploded view schematic diagram of the grounding structure of the flat cable of the present utility model;

[0020] Figure 5 is a combined cross-sectional view of the grounding structure of the flat cable of the present utility model;

[0021] Figure 6 is a partial three-dimensional external view schematic diagram of another embodiment of the grounding structure of the flat cable of the present utility model;

[0022] Figure 7 is a three-dimensional exploded view schematic diagram of another embodiment of the grounding structure of the flat cable of the present utility model;

[0023] Figure 8 Combined cross-sectional view of another embodiment of the grounding structure of the flexible flat cable of the present utility model;

[0024] Wherein:

[0025] 10, 10a: Flexible flat cable

[0026] 11, 11a: Insulator

[0027] 12, 12a: Core wire

[0028] 120, 120a: Pin

[0029] 121, 121a: Grounding pin

[0030] 122, 122a: Signal pin

[0031] 13, 13a: Shielding layer

[0032] 14, 14a: Grounding part

[0033] 141, 141a: Cover plate

[0034] 1410: First welding hole

[0035] 142, 142a: Insertion pin

[0036] 143: Flap

[0037] 1430: Second welding hole

[0038] 15, 15a: Protective layer

[0039] 20, 20a: Circuit board

[0040] 21, 21a: Signal pad

[0041] 22, 22a: Grounding pad

[0042] 23, 23a: Grounding portion

[0043] 24: Conductive connection portion. Detailed implementation manners

[0044] The following will disclose multiple embodiments of the present utility model with the accompanying drawings. For the sake of clear illustration, many practical details will be described together in the following narrative. However, it should be understood that these practical details are not used to limit the present utility model. That is to say, in some embodiments of the present utility model, these practical details are not necessary. In addition, for the purpose of simplifying the drawings, some conventional structures and elements will be shown in a simple schematic manner in the drawings, and in all the drawings, the same reference numerals will be used to represent the same or similar elements. And if possible in practice, the features of different embodiments can be applied interactively.

[0045] Unless otherwise defined, all the terms (including technical and scientific terms) used herein have their ordinary meanings, and their meanings can be understood by those skilled in this field. Further, the definitions of the above terms in commonly used dictionaries should be interpreted as being consistent with the meanings in the related fields of the present utility model in the content of this specification. Unless specifically defined otherwise, these terms will not be interpreted as idealized or overly formal meanings.

[0046] The detailed description and technical content of the present utility model are described as follows in conjunction with the drawings. However, the accompanying drawings are only provided for reference and illustration purposes and are not used to limit the present utility model.

[0047] Refer to Figure 1 and Figure 2 , which are the three-dimensional external view diagrams of the two-side directions of the grounding structure of the flexible flat cable of the present utility model. A grounding structure of a flexible flat cable 10 of the present utility model discloses that a flexible flat cable 10 is connected to a circuit board 20 to provide a grounding function for the flexible flat cable 10. In this embodiment, a plurality of flexible flat cables 10 are arranged at intervals on the opposite sides of the circuit board 20. However, in actual implementation, the number and positions of the flexible flat cables 10 can be adjusted according to the actual usage conditions.

[0048] Please refer to Figures 3 to 5 again, which are respectively the partial three-dimensional external view diagram, the three-dimensional exploded view diagram and the combined cross-sectional view of the grounding structure of the flexible flat cable of the present utility model. The flexible flat cable 10 of the present utility model includes an insulator 11, a plurality of wire cores 12, a shielding layer 13 and a grounding member 14. These wire cores 12 are arranged at intervals and are covered by the insulator 11. In addition, one end of these wire cores 12 protrudes from one end of the insulator 11 to form a plurality of pins 120. These pins 120 include at least one grounding pin 121 and at least one signal pin 122. The shielding layer 13 is coated outside the insulator 11 and exposes these pins 120. The shielding layer 13 can be made of a material such as aluminum foil.

[0049] Furthermore, the grounding member 14 covers the pins 120. The grounding member 14 includes a cover plate 141 and at least one pin 142 connected to the cover plate 141. The pin 142 is arranged corresponding to the grounding pin 121 and is located on one side surface of the cover plate 141.

[0050] In this embodiment, the flexible flat cable 10 further includes a protective layer 15. The protective layer 15 is coated outside the shielding layer 13, and the shielding layer 13 is folded outward and stacked.

[0051] Specifically, the number of the grounding pins 121, the signal pins 122 and the pins 142 is multiple. The multiple grounding pins 121 and the multiple signal pins 122 are arranged in parallel. In addition, each pin 142 of the grounding member 14 is arranged in an I shape and is perpendicular to the pins 120.

[0052] The grounding member 14 is a metal member. The cover plate 141 is provided with a plurality of first welding holes 1410. In addition, the grounding member 14 includes a pair of fins 143 arranged on the opposite side of the cover plate 141. Each fin 143 is provided with a plurality of second welding holes 1430. The arrangement of the first welding holes 1410 and the second welding holes 1430 helps to improve the bonding property when the grounding member 14 is welded to the circuit board 20.

[0053] Furthermore, the circuit board 20 includes at least one signal pad 21, at least one grounding pad 22 and at least one grounding portion 23. In this embodiment, the grounding portion 23 is arranged as a jack, but is not limited thereto. Also, when the flexible flat cable 10 is combined with the circuit board 20 by fixing means such as welding, the signal pin 122 of the grounding member 14 is electrically connected to the signal pad 21, and the grounding pin 121 is electrically connected to the grounding portion 23; accordingly, the flexible flat cable 10 can achieve the functions of signal transmission and grounding.

[0054] Specifically, the grounding portion 23 is located on one side of the grounding pad 22, and the number of the signal pad 21, the grounding pad 22 and the grounding portion 23 is set to be multiple corresponding to the number of the grounding pins 121, the signal pins 122 and the pins 142.

[0055] In this embodiment, the circuit board further includes a conducting portion 24. The conducting portion 24 is located on one side of the signal pad 21 and the grounding pad 22. It should be noted that flexible flat cables 10 are arranged on both opposite sides of the circuit board 20 and are combined with grounding members 14.

[0056] It should be noted that the flexible flat cable 10 of the present utility model shields the exposed pins 120 through the grounding member 14, so as to reduce the crosstalk and noise caused by external electronic devices to the flexible flat cable 10, and can provide better electromagnetic compatibility (EMC) for high-speed signals.

[0057] Please refer to Figures 6 to 8, which are respectively a partial three-dimensional external view schematic diagram, a three-dimensional exploded view schematic diagram, and a combined cross-sectional view of another embodiment of the grounding structure of the flexible flat cable of the present utility model. This embodiment discloses a flexible flat cable 10a and a circuit board 20a. The flexible flat cable 10a includes an insulator 11a, a plurality of wire cores 12a, a shielding layer 13a, a grounding member 14a, and a protective layer 15a. The circuit board 20a includes at least one signal pad 21a, at least one grounding pad 22a, and at least one grounding portion 23a. In this embodiment, the structure of the flexible flat cable 10a is substantially the same as that of the previous embodiment, and the difference lies in the implementation forms of the grounding member 14a and the grounding portion 23a.

[0058] In this embodiment, one end of the wire core 12a protrudes from one end of the insulator 11a to form a plurality of pins 120a. The pins 120a include at least one grounding pin 121a and at least one signal pin 122a. Further, the grounding member 14a includes a cover plate 141a and a plurality of pins 142a. Each pin 142a is arranged in a Z shape and extends parallel to the pins 120a. In addition, the grounding portion 23 is provided as a conductive pad. Accordingly, when the flexible flat cable 10a is combined with the circuit board 20a by fixing means such as welding, the signal pin 122a of the grounding member 14a is conductively connected to the signal pad 21a, and the grounding pin 121a is conductively connected to the grounding portion 23a.

[0059] The above are only the preferred embodiments of the present utility model, and are not intended to limit the patent scope of the present utility model. Other equivalent changes using the present utility model shall fall within the patent scope of the present utility model.

Claims

1. A flexible flat cable, characterized in that, Comprising: An insulator; Multiple wire cores, arranged at intervals and covered by the insulator. One end of these wire cores protrudes from one end of the insulator to form multiple pins, and these pins include at least one ground pin and at least one signal pin; A shielding layer, coated outside the insulator and exposing these pins; and A grounding member, covering these pins. The grounding member includes a cover plate and at least one pin connected to the cover plate. The pin is arranged corresponding to the at least one ground pin and is located on one side surface of the cover plate.

2. The flat flexible cable according to claim 1, wherein It further includes a protective layer, which is coated outside the shielding layer, and the shielding layer is folded outward and stacked.

3. The flat flexible cable according to claim 1, characterized in that Wherein the number of the at least one ground pin, the at least one signal pin, and the at least one pin is multiple. The multiple ground pins and the multiple signal pins are arranged in parallel. Each pin is arranged in an I shape and is perpendicular to these pins.

4. The flat flexible cable according to claim 1, wherein, Wherein the cover plate is provided with multiple first welding holes.

5. The flat flexible cable according to claim 1, wherein Wherein the grounding member includes a pair of fins arranged on the opposite side of the cover plate, and each fin is provided with multiple second welding holes.

6. The flat flexible cable according to claim 5, characterized in that, Wherein each pin is arranged in a Z shape and extends and is parallel to these pins.

7. The grounding structure of a flat flexible cable, characterized in that Comprising: A flat cable as described in any one of claims 1 to 6; And A circuit board, combined with the flat cable. The circuit board includes at least one signal pad, at least one ground pad, and at least one grounding portion. The at least one signal pin is conductively connected to the at least one signal pad, and the at least one ground pin is conductively connected to the at least one grounding portion.

8. The grounding structure of the flat flexible cable according to claim 7, wherein, Wherein the at least one grounding portion is located on one side of the at least one ground pad, and the number of the at least one signal pad, the at least one ground pad, and the at least one grounding portion is set to be multiple corresponding to the number of the at least one ground pin, the at least one signal pin, and the at least one pin.

9. The grounding structure of the flat flexible cable according to claim 7, characterized in that, Wherein the circuit board further includes a conductive connection portion, which is located on one side of the at least one signal pad and the at least one ground pad.

10. The grounding structure of the flat flexible cable as described in claim 7, characterized in that, Wherein the at least one grounding portion is a jack or a conductive connection pad.

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