Ffc flat cable

Abstract

The present disclosure relates to the technical field of FFC flat cable, and specifically discloses a FFC flat cable, which comprises a conductor layer, an insulating outer covering and a grounding metal piece, the conductor layer comprises a plurality of conductive wires, the plurality of conductive wires are arranged at intervals, and the plurality of conductive wires comprise a grounding conductive wire and a non-grounding conductive wire; the insulating outer covering is wrapped outside the conductor layer, the insulating outer covering is provided with a window opposite to the grounding conductive wire, and a part of the grounding conductive wire is exposed through the window; the grounding metal piece is arranged outside the insulating outer covering, and the grounding metal piece is welded with the grounding conductive wire through solder, and the solder is filled in the window. The FFC flat cable provided by the present disclosure can effectively ensure the connection strength between the grounding conductive wire and the grounding metal piece by welding the grounding conductive wire which needs to be grounded with the grounding metal piece through solder, so that the two are in strong contact, thereby avoiding the grounding failure of the FFC caused by abrasion during use, and improving the stability of the grounding of the FFC flat cable.

Description

Technical Field

[0001] This disclosure relates to the field of FFC cable technology, and more particularly to an FFC cable. Background Technology

[0002] Flexible flat cables (FC cables) are widely used in electronic products. FFC cables typically consist of a conductor layer made up of multiple spaced, parallel wires, and an insulating film layer covering the conductor layer. During use, grounding and shielding are often required.

[0003] The related technology provides a solution for grounding FFC cables. Specifically, grooves are made on multiple conductors that need to be grounded, and the grooves penetrate the insulating film layer on one side of the conductor. Silver paste is poured into the grooves, and the silver paste is covered and contacted by conductive cloth. Then, the conductive cloth is connected to the casing of the electronic product to achieve grounding.

[0004] However, in some applications, FFC cables move with the electrical components, which can cause wear and tear on the FFC cables. The structure of the conductors and conductive cloth connected by silver paste has low strength, which can easily cause the silver paste to detach, leading to grounding failure and affecting the normal operation of the electrical components.

[0005] The information disclosed above in this background section is only intended to enhance the understanding of this background section, and therefore may include prior art that is not known to those skilled in the art. Utility Model Content

[0006] The purpose of this disclosure is to provide an FFC cable to improve the stability of FFC cable grounding.

[0007] This disclosure provides an FFC cable, which includes:

[0008] A conductor layer includes a plurality of wires, the plurality of wires being spaced apart, and the plurality of wires including grounded wires and ungrounded wires;

[0009] An insulating outer sheath covers the conductor layer, and the insulating outer sheath is provided with an opening opposite to the grounding wire, and a portion of the grounding wire is exposed through the opening;

[0010] A grounding metal component is disposed outside the insulating outer sheath, and the grounding metal component is welded to the grounding conductor by solder, the solder filling the opening.

[0011] As a preferred technical solution for FFC cables, the FFC cables further include conductive cloth, which is attached to the grounding metal component, and the conductive cloth at least covers the insulating outer sheath portion.

[0012] As a preferred technical solution for FFC cabling, the conductive cloth has through holes, the insulating outer sheath passes through the through holes, and the grounding metal component is located inside the through holes.

[0013] As a preferred technical solution for FFC cabling, the conductor layer includes multiple grounding wires, the insulating outer sheath is provided with multiple openings, and the multiple openings are provided one-to-one with the multiple grounding wires. The grounding metal component is soldered to each of the grounding wires.

[0014] As a preferred technical solution for FFC cabling, each of the conductors extends along a first direction, the plurality of windows are arranged sequentially at intervals along a second direction, the grounding metal component extends along the second direction, and the first direction and the second direction are arranged at an angle.

[0015] As a preferred technical solution for FFC cabling, the included angle is 90°.

[0016] As a preferred technical solution for FFC cabling, the insulating outer sheath includes a first insulating film layer and a second insulating film layer, and the conductor layer is disposed between the first insulating film layer and the second insulating film layer.

[0017] The window is located on the second insulating film layer and is formed by laser processing.

[0018] As a preferred technical solution for FFC cabling, the length of each of the conductors is equal to the length of the first insulating film layer, and the two ends of each conductor in the length direction are flush with the two ends of the first insulating film layer in the length direction.

[0019] The length of the first insulating film layer is greater than the length of the second insulating film layer, and the second insulating film layer is centered relative to the first insulating film layer along the length direction of the first insulating film layer.

[0020] As a preferred technical solution for the FFC cable, the FFC cable further includes two reinforcing plates, both of which are connected to the first insulating film layer, and the two reinforcing plates are respectively disposed at both ends of the first insulating film layer.

[0021] As a preferred technical solution for FFC cabling, the reinforcing plate and the second insulating film layer are staggered along the length direction of the first insulating film layer.

[0022] The FFC cable provided in this embodiment has at least the following beneficial effects:

[0023] The FFC cable provided in this embodiment welds the grounding conductor that needs to be grounded to the grounding metal part with solder, which can effectively ensure the connection strength between the grounding conductor and the grounding metal part, making strong contact between the two, thereby avoiding grounding failure caused by wear during the use of FFC and improving the stability of FFC cable grounding. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of an FFC cable provided in one embodiment of the present disclosure;

[0025] Figure 2 This is an exploded view of an FFC cable provided in one embodiment of this disclosure;

[0026] Figure 3 This is a cross-sectional view of an FFC cable provided in one embodiment of this disclosure;

[0027] Figure 4 This is a partial structural diagram of an FFC cable provided in one embodiment of the present disclosure.

[0028] In the picture:

[0029] 1. Conductor layer; 11. Grounding conductor; 12. Ungrounded conductor;

[0030] 2. Insulating outer sheath; 21. First insulating film layer; 22. Second insulating film layer; 221. Window opening;

[0031] 3. Grounding metal parts;

[0032] 4. Solder;

[0033] 5. Conductive cloth; 51. Through hole;

[0034] 6. Reinforcing plate. Detailed Implementation

[0035] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0036] It should be understood that the steps described in the method embodiments of this disclosure may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this disclosure is not limited in this respect.

[0037] The term "comprising" and its variations as used herein are open-ended inclusions, meaning "including but not limited to". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; and the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the description below.

[0038] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0039] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0040] It should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" in this disclosure should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0041] The embodiments of this disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this disclosure, and should not be construed as limiting this disclosure.

[0042] The embodiments disclosed herein can be applied to the production and processing of FFC cables, as well as the practical applications of FFC cables.

[0043] FFC cables are flexible flat cables that are lightweight, flexible, and provide efficient connections. They can be bent and folded freely and are widely used for power and signal transmission between electrical components and motherboards.

[0044] FFC (Flexible Charging) cables typically consist of a conductor layer made up of multiple spaced and parallel wires, and an insulating film layer covering the conductor layer. The conductor layer connects the electronic components to the motherboard. During use, electronic components connected to the conductor layer and those surrounding the FFC cable can generate electromagnetic interference (EMI) through conduction or radiation. If this EMI is not eliminated promptly, it can cause garbled signals in the transmitted signals, affecting the normal operation of the electronic components. Therefore, grounding and shielding are frequently required in the practical use of FFC cables.

[0045] When grounding, the wire that needs to be grounded is usually connected to the metal casing of the electronic product through a metal with conductive properties.

[0046] In related technologies, grooves are made on multiple conductors that need to be grounded, with each groove penetrating an insulating film layer on one side of the conductor. Silver paste is poured into the grooves, and a conductive cloth covers and contacts the silver paste. The conductive cloth is then connected to the casing of the electronic product to achieve grounding. However, in some applications, FFC cables move with the electrical components. For example, FFC is used for electrical connections of moving parts in printers and scanners, for electrical connections of rotatable cameras, and for electrical connections of wearable detection devices. This requires the FFC cable to bend adaptively with the moving parts, leading to wear and tear. The structure of connecting the conductors and conductive cloth with silver paste has low structural strength, making it easy for the silver paste to detach and affecting the normal operation of the electrical components.

[0047] To overcome the above problems, this disclosure provides an FFC cable that directly connects the grounding metal to the conductor that needs to be grounded through a welding process, achieving strong contact between the conductor that needs to be grounded and the grounding metal, resulting in higher connection strength and preventing detachment, thus significantly improving the stability of the FFC cable grounding.

[0048] Figure 1 This is a schematic diagram of the structure of an FFC cable provided in one embodiment of the present disclosure; Figure 2 This is an exploded view of an FFC cable provided in one embodiment of this disclosure; Figure 3 This is a cross-sectional view of an FFC cable provided in one embodiment of this disclosure; Figure 4 This is a partial structural diagram of the FFC cable provided in one embodiment of this disclosure. Please refer to... Figures 1 to 4The FFC cable includes a conductor layer 1, an insulating outer sheath 2, and a grounding metal component 3. The conductor layer 1 includes multiple conductors spaced apart, including a grounding conductor 11 and ungrounded conductors 12. The insulating outer sheath 2 covers the conductor layer 1 and has an opening 221 opposite to the grounding conductor 11, through which a portion of the grounding conductor 11 is exposed. The grounding metal component 3 is disposed outside the insulating outer sheath 2 and is soldered to the grounding conductor 11 using solder 4, which fills the opening 221. The FFC cable provided in this embodiment effectively ensures the connection strength between the grounding conductor 11 and the grounding metal component 3 by soldering the grounding conductor 11 to the grounding metal component 3 using solder 4. This strong contact prevents grounding failure due to wear during FFC use and improves the stability of the FFC cable grounding.

[0049] In some embodiments, the conductor is a flat metal conductor, such as a flat copper wire. In other embodiments, the conductor body may also be configured in other shapes as needed, such as a round conductor.

[0050] In some embodiments, the grounding metal component 3 is made of a metal with low impedance, such as copper or aluminum. In other embodiments, the material of the grounding metal component 3 can be selected from other metals according to actual needs.

[0051] In some embodiments, the length direction of the conductor is a first direction (e.g., Figure 2 (As indicated by the middle arrow ab), the width direction of the conductor is the second direction (e.g., Figure 2 (In the direction indicated by the middle arrow cd), along the second direction, the width of the opening 221 does not exceed the size of the grounding wire 11, and the two ends of the opening 221 do not exceed the two ends of the wire. With this setting, the solder 4 can be piled on top of the grounding wire 11 during the soldering process, which can prevent the solder 4 from contacting other wires adjacent to the grounding wire 11 and causing a short circuit.

[0052] In some embodiments, the FFC cable further includes a conductive cloth 5, which is attached to the grounding metal component 3 and at least partially covers the insulating outer sheath 2. The conductive cloth 5 is used to connect with the metal frame or housing of the electronic product to achieve grounding of the grounding wire 11. Because the conductive cloth 5 is flexible, it can adaptively deform as the FFC cable moves with the moving electrical components. In other embodiments, the conductive cloth 5 can be replaced by other flexible conductive materials, such as flexible wires or metal foil.

[0053] It is understood that the conductive cloth 5 must at least cover the grounding metal component 3 and be stably attached to it to ensure the stability of the electrical connection between the conductive cloth 5 and the grounding metal component 3. In this embodiment, the conductive cloth 5 has a through hole 51, through which the insulating outer sheath 2 passes, and the grounding metal component 3 is located within the through hole 51. This arrangement allows the conductive cloth 5 to tightly bind the insulating outer sheath 2 and the grounding metal component 3 together, ensuring not only the stability of the connection between the conductive cloth 5 and the grounding metal component 3 but also enhancing the stability of the connection between the grounding metal component 3 and the grounding wire 11.

[0054] In some embodiments, the conductor layer 1 includes a plurality of grounding wires 11, and the insulating outer sheath 2 is provided with a plurality of openings 221, each opening 221 corresponding to a plurality of grounding wires 11. The grounding metal component 3 is soldered to each grounding wire 11 by solder 4. With this configuration, by simultaneously soldering the grounding metal component 3 to the plurality of grounding wires 11 by solder 4, the plurality of grounding wires 11 can be grounded simultaneously.

[0055] In this embodiment, an exemplary scheme is provided in which the conductor layer 1 includes two grounding wires 11. In other embodiments, the conductor layer 1 may also include one grounding wire 11, three grounding wires 11, or more than three grounding wires 11 as needed.

[0056] In addition, the number of ungrounded conductors 12 can be set according to actual needs; there can be one or more.

[0057] In some embodiments, the solder 4 is specifically solder paste, and the grounding metal part 3 is soldered together with each grounding wire 11 by a hot-press soldering process.

[0058] In some embodiments, each conductor extends along a first direction, a plurality of openings 221 are sequentially spaced along a second direction, and the grounding metal member 3 extends along the second direction, with the first direction and the second direction forming an angle. This arrangement ensures that the plurality of openings 221 are located on the same straight line, facilitating the sequential welding of the grounding metal member 3 to each grounding conductor 11.

[0059] In other embodiments, the multiple openings 221 may also be randomly arranged. Accordingly, the FFC cable may also include multiple grounding metal parts 3, which are welded one-to-one with multiple grounding wires 11; or, each grounding metal part 3 may be welded to a portion of the grounding wires 11 simultaneously.

[0060] In some embodiments, the included angle is 90°. This setting minimizes the length of the grounding metal component 3. In other embodiments, the included angle can be set to other angles as needed. For example, the included angle can also be set to 60°, 70°, 80°, etc.

[0061] In some embodiments, the insulating outer sheath 2 includes a first insulating film layer 21 and a second insulating film layer 22, with a conductor layer 1 disposed between the first insulating film layer 21 and the second insulating film layer 22; a window 221 is disposed on the second insulating film layer 22, and the window 221 is processed by laser technology. This configuration eliminates the need for manual processing of the window 221, ensuring product quality; furthermore, the insulating outer sheath 2, composed of the first insulating film layer 21 and the second insulating film layer 22, facilitates processing.

[0062] In other embodiments, the insulating outer sheath 2 can also be configured as an integral structure, with the conductor layer 1 embedded within the insulating outer sheath 2.

[0063] In some embodiments, the length of each conductor is equal to the length of the first insulating film layer 21, and the two ends of each conductor are flush with the two ends of the first insulating film layer 21 along its length. The length of the first insulating film layer 21 is greater than the length of the second insulating film layer 22, and the second insulating film layer 22 is centrally located relative to the first insulating film layer 21 along its length. This arrangement allows the two ends of each conductor to expose the second insulating film layer 22 to form pins, facilitating connection with other electrical components.

[0064] In some embodiments, the FFC cable further includes two reinforcing plates 6, both of which are connected to the first insulating film layer 21, and are respectively disposed at both ends of the first insulating film layer 21. It is understood that both reinforcing plates 6 are made of rigid material, which enhances the strength of both ends of the FFC cable, facilitating stable and reliable connection between the two ends of the FFC cable and other electrical components.

[0065] In some embodiments, the reinforcing plate 6 and the second insulating film layer 22 are staggered along the length of the first insulating film layer 21. This arrangement allows the second insulating film layer 22 and the first insulating film layer 21 to jointly absorb stress when the FFC cable is bent, preventing stress concentration caused by bending only the conductor layer 1 and the first insulating film layer 21 in the FFC cable, thus extending the service life of the FFC cable.

[0066] The manufacturing process for this FFC cable is as follows:

[0067] S1: Sequentially attach the first insulating film layer 21, the conductor layer 1, and the second insulating film layer 2;

[0068] S2: Each window 221 is processed in the second insulating film layer 2 using a laser machine;

[0069] S3: The grounding metal part 3 is welded together with each grounding wire 11 by hot-press molten soldering process;

[0070] S4: Wrap the semi-finished product obtained after step S3 with conductive cloth 5 so that the grounding metal part 3 is wrapped inside the conductive cloth 5.

[0071] The above description is merely a preferred embodiment of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features disclosed in this disclosure that have similar functions.

[0072] Furthermore, while several specific implementation details are included in the foregoing discussion, these should not be construed as limiting the scope of this disclosure. Certain features described in the context of individual embodiments may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented individually or in any suitable sub-combination in multiple embodiments.

[0073] Although the subject matter has been described using language specific to structural features and / or methodological logic, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. Rather, the specific features and actions described above are merely illustrative examples of implementing the claims.

Claims

1. An FFC cable, characterized in that, include: The conductor layer (1) includes a plurality of wires, which are spaced apart, and the plurality of wires include a grounded wire (11) and a non-grounded wire (12). An insulating outer sheath (2) is provided to cover the conductor layer (1). The insulating outer sheath (2) is provided with a window (221) opposite to the grounding wire (11), and a part of the grounding wire (11) is exposed through the window (221). A grounding metal part (3) is disposed outside the insulating outer sheath (2), and the grounding metal part (3) is welded to the grounding wire (11) by solder (4), the solder (4) filling the opening (221).

2. The FFC cable according to claim 1, characterized in that, The FFC cable also includes a conductive cloth (5), which is attached to the grounding metal part (3), and the conductive cloth (5) at least partially covers the insulating outer sheath (2).

3. The FFC cable according to claim 2, characterized in that, The conductive cloth (5) has a through hole (51), the insulating outer sheath (2) passes through the through hole (51), and the grounding metal part (3) is located inside the through hole (51).

4. The FFC cable according to claim 1, characterized in that, The conductor layer (1) includes a plurality of grounding wires (11), the insulating outer sheath (2) is provided with a plurality of openings (221), the plurality of openings (221) are provided in a one-to-one correspondence with the plurality of grounding wires (11), and the grounding metal part (3) is welded to each of the grounding wires (11) by solder (4).

5. The FFC cable according to claim 4, characterized in that, Each of the said conductors extends along a first direction, and the plurality of said windows (221) are arranged sequentially at intervals along a second direction. The grounding metal part (3) extends along the second direction, and the first direction and the second direction are arranged at an angle.

6. The FFC cable according to claim 5, characterized in that, The included angle is 90°.

7. The FFC cable according to any one of claims 1-6, characterized in that, The insulating outer sheath (2) includes a first insulating film layer (21) and a second insulating film layer (22), and the conductor layer (1) is disposed between the first insulating film layer (21) and the second insulating film layer (22); The window (221) is disposed on the second insulating film layer (22), and the window (221) is processed by laser process.

8. The FFC cable according to claim 7, characterized in that, The length of each of the wires is equal to the length of the first insulating film layer (21), and the two ends of each wire in the length direction are flush with the two ends of the first insulating film layer (21) in the length direction. The length of the first insulating film layer (21) is greater than the length of the second insulating film layer (22), and the second insulating film layer (22) is centered relative to the first insulating film layer (21) along the length direction of the first insulating film layer (21).

9. The FFC cable according to claim 8, characterized in that, The FFC cable also includes two reinforcing plates (6), both of which are connected to the first insulating film layer (21), and the two reinforcing plates (6) are respectively disposed at both ends of the first insulating film layer (21).

10. The FFC cable according to claim 9, characterized in that, Along the length of the first insulating film layer (21), the reinforcing plate (6) and the second insulating film layer (22) are staggered.

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