CN112289490A - Flexible flat cable and flat cable arranging process - Google Patents

Abstract

The invention discloses a flexible flat cable and a flat cable process, which relate to the technical field of data cables and comprise a flat cable, wherein the flat cable comprises: a plurality of core wire units, the plurality of core wire units being arranged side by side, the number of the plurality of core wire units being 4 or more; the sheath is wrapped on the peripheries of the core wire units to enable the flat cable to be a flat whole; the flat cable is wound into a cylindrical structure in a combined mode, and the edges of two sides of the flat cable are abutted or overlapped. The cylindrical flat cable in the application can reduce the occupied space of the flat cable, increase the flexibility of the flat cable, can be bent at any angle and is convenient to install.

Description

Flexible flat cable and flat cable arranging process

Technical Field

The invention relates to the technical field of data cables, in particular to a flexible flat cable and a flat cable arranging process.

Background

The cable is a wire product used for transmitting electric energy and magnetic energy, information and realizing electromagnetic energy conversion, the cable is an assembly consisting of one or more insulated wire cores, and a coating layer, a total protective layer and an outer protective layer which may be respectively arranged on the insulated wire cores, and the cable is used as a tool for transmitting the electric energy and the magnetic energy in a large amount in various industries due to the rapid development of the global technological level.

The Flat Cable (FFC) is used as a signal transmission component, has the advantages of arbitrary deflection, high signal transmission capability and the like, can arbitrarily select the number and the interval of wires, is more convenient to connect, is most suitable for being used as a data transmission Cable between a mobile part and a main board, between a PCB (printed circuit board) and the PCB and in miniaturized electrical equipment, is widely applied to connection between a printing head of various printers and the main board at present, and is widely applied to signal transmission and board connection of products such as a plotter, a scanner, a copying machine, a sound box, a liquid crystal electrical appliance, a fax machine, various video disc players, electric tools and the like. However, the flex cable is limited by the limited space of the miniaturized electrical equipment, so the flex cable is inevitably folded or bent to fit the limited space range, but the number of wires on the flex cable is large, which results in the same too large outer diameter of the flex cable, especially the bending radius D1 when the flex cable is bent in the transverse direction (as shown in fig. 2), which is difficult to achieve in the transverse bending, so the flex cable in the prior art cannot be used as a data transmission cable in the miniaturized electrical equipment.

Disclosure of Invention

One of the objectives of the present invention is to provide a flexible flat cable, so as to solve the problem that the flat cable in the prior art is difficult to bend laterally, so that the occupied area is large, and the flat cable cannot be used as a data transmission cable in a miniaturized electrical device.

The second purpose of the invention is to provide a wire arranging process.

In order to achieve one of the purposes, the invention adopts the following technical scheme: a flex cable, comprising: the winding displacement, the winding displacement includes: a plurality of core wire units, the plurality of core wire units being arranged side by side, the number of the plurality of core wire units being 4 or more; the sheath is wrapped on the peripheries of the core wire units to enable the flat cable to be a flat whole; the flat cable is wound into a cylindrical structure in a combined mode, and the edges of two sides of the flat cable are abutted or overlapped.

Further, in the embodiment of the invention, the core wire unit comprises a plurality of conductors and an insulating material wrapped outside the conductors.

Further, in the embodiment of the present invention, the sheath is made of an insulating material.

Further, in the embodiment of the present invention, the inner side of the flat cable is provided with a filler.

Further, in the embodiment of the present invention, the filler is a filler rod or a filler rope.

Further, in the embodiment of the present invention, a belting layer is disposed outside the flat cable.

Further, in the embodiment of the present invention, the wrapping layer is made of a polyester film.

Further, in the embodiment of the present invention, the belting layer is disposed outside the flat cable in a longitudinal wrapping or winding manner.

Further, in the embodiment of the present invention, a shielding layer is disposed outside the flat cable.

Further, in the embodiment of the present invention, an outer sheath layer is disposed outside the flat cable.

In order to achieve the second purpose, the invention adopts the following technical scheme: a wire arranging process is characterized by comprising the following steps:

in rows: selecting a plurality of core wire units, putting the core wire units into a flat die, and extruding a sheath outside the core wire units to obtain a flat-structure flat cable;

winding: winding the flat cable into a cylindrical structure by twisting

The invention has the beneficial effects that:

the flat cable is wound into a cylindrical structure in a twisting mode, and on one hand, the flat cable in the cylindrical structure is smaller than the flat cable in the flat structure in the occupied area of the width space relative to the flat cable in the flat structure, so that the use of the occupied area is favorably reduced. In another aspect, the flat ribbon of the flat structure is smaller in cross-outer diameter than the flat ribbon of the cylindrical structure. As shown in fig. 2 and 4, the flat ribbon cable has a transverse outer diameter D1 when unwound, the transverse outer diameter D1 is larger than the sum of the outer diameters of all the core wire units, and after winding, the ribbon cable of the cylindrical structure has a transverse outer diameter D2, the transverse outer diameter D2 is not more than D1/pi, i.e., D2 is obviously smaller than D1, so that the ribbon cable of the cylindrical structure has better flexibility when bent transversely. Finally, the winding displacement is wound in a twisting mode in the application, and the stability of the cylindrical structure can be improved.

Drawings

Fig. 1 is a schematic structural view of a flex cable according to the present invention.

Fig. 2 is a schematic view of a flat cable structure before twisting in the present invention.

Fig. 3 is a schematic view of a flat cable structure during twisting in the present invention.

Fig. 4 is a schematic diagram of a twisted flat cable structure according to the present invention.

Fig. 5 is a schematic structural view illustrating a connection between a flex cable and a connector according to the present invention.

In the attached drawings

10. Flat cable 101, core wire unit 102, and sheath

20. Filler 30, belting layer

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clear and fully described, embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of some embodiments of the invention and are not limiting of the invention, and that all other embodiments obtained by those of ordinary skill in the art without the exercise of inventive faculty are within the scope of the invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "a," "an," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

For the purposes of simplicity and explanation, the principles of the embodiments are described by referring mainly to examples. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the embodiments. But it is obvious. To one of ordinary skill in the art, the embodiments may be practiced without limitation to these specific details. In some instances, well-known flex processes and structures have not been described in detail to avoid unnecessarily obscuring these embodiments. In addition, all embodiments may be used in combination with each other.

The first embodiment is as follows:

fig. 1 is a schematic structural view of a flex cable according to the present invention, and fig. 2 to 4 are schematic twisting processes of the flex cable. As shown in fig. 1 to 4, the flex cable includes a flex cable 10, the flex cable 10 includes a plurality of core wire units 101 and a sheath 102, the plurality of core wire units 101 are arranged side by side, and the sheath 102 is wrapped outside the core wire units 101 by extrusion, so that the plurality of core wire units 101 form a flat whole. The core wire unit 101 is composed of a plurality of conductors and an insulating material wrapping the outer sides of the conductors, the number of the core wire units is greater than or equal to 4, the sheath 102 is also made of the insulating material, and the insulating material is preferably made of a plastic or rubber material with a low dielectric constant, such as PE, PET, TPU, and the like, and the application is not limited.

On the basis, the flat cable 10 in the present application is wound into a cylindrical structure by twisting, and two side edges of the flat cable 10 are abutted or overlapped. With this arrangement, on the one hand, the flat cable 10 having a cylindrical structure occupies a smaller area than the flat cable 10 having a flat structure in terms of the width space, and therefore, it is advantageous to reduce the occupied area. In another aspect, the ribbon wire 10 of the cylindrical structure is smaller in cross-outer diameter relative to the ribbon wire 10 of the flat structure than the ribbon wire 10 of the flat structure. As shown in fig. 2 and 4, the flat cable 10 has a transverse outer diameter D1 when it is unwound, the transverse outer diameter D1 is larger than the sum of the outer diameters of all the core wire units 101, and after it is wound, the flat cable 10 has a transverse outer diameter D2, the transverse outer diameter D2 is not more than D1/pi, i.e., D2 is significantly smaller than D1, so that the flat cable 10 has better flexibility when it is bent transversely. Finally, the flat cable 10 is twisted in the present application, which can also increase the stability of the cylindrical structure.

Further, inside the flat cable 10, a filler 20 is disposed, and the filler 20 may specifically be a filler rod or a filler rope. The filler 20 is mainly used for ensuring that the appearance of the flat cable is round; meanwhile, the filler ensures the relatively stability of the flat cable 10 during winding, and prevents the flat cable 10 from displacement and reducing the service life of the cable.

Further, a wrapping layer 30 is arranged on the outer side of the flat cable 10, the wrapping layer 30 specifically adopts a polyester film, the polyester film is wrapped on the outer side of the flat cable 10 in a longitudinal wrapping or winding mode, and the wound flat cable 10 is wrapped and fixed, so that the cylindrical structure of the flat cable 10 is more stable.

Fig. 5 is a schematic structural diagram showing the connection between the flexible flat cable and the connector, when the connection is required, the wrapping layer 30 at the end of the flexible flat cable is cut off, so that the end of the cable is scattered from the winding state, and then the sheath 102 is peeled off, so that the connection can be completed.

Example two:

the embodiment also discloses a flexible flat cable. On the basis of the first embodiment, the flexible flat cable can be provided with a shielding layer on the outer side of the wrapping layer 30, and the shielding layer can be formed by weaving metal wires or by wrapping metal foil tapes and is used for improving the anti-electromagnetic interference performance of the cable.

Example three:

the embodiment also discloses a flexible flat cable. On the basis of the first embodiment, the outer side of the belting layer 30 of the flexible flat cable can be wrapped by an outer sheath layer which can be made of insulating materials with low dielectric constants, the thickness of the outer sheath layer is not less than 1.5mm, the flat cable 10 is protected, and the strength of the flexible flat cable is improved.

Example four:

a wire arranging process, as shown in fig. 1-4, comprising the steps of:

selecting a plurality of core wire units 101 to be placed in a flat mold, and extruding a sheath 102 on the outer side of the core wire units 101 to obtain the flat structure flat cable 10;

the flat cable 10 is twisted to form a cylindrical structure.

The core wire is circular or oval, and comprises a plurality of conductors and an insulating material coated on the conductors. And determining the distance between the conductors in the core wire according to the preset jack distance, and determining the radius of the conductors in the core wire according to the preset jack radius, the transmission power, the transmission loss and the mechanical strength.

During twisting, a servo motor differential structure is adopted, and the flat cable 10 is twisted by dragging the flat cable through a servo system. The twisted flat cable 10 is twisted at a certain pitch, and the twisted flat cable 10 is formed in a cylindrical structure, and a filler 20 is added to the cylindrical structure to ensure the regularity of the appearance and to stabilize the structure.

Preferably, a wire passing heat removal machine is arranged, and a wire passing cooling ring is arranged at the upper end of the wire passing heat removal machine, so that the added filler 20 is rapidly cooled and solidified.

The twisted flat cable 10 is preferably wrapped and fixed by a thermoplastic polyester film wrapping tape 30. The flat cable 10 is more stable in structure.

Preferably, the twisted ribbon cable 10 is sheathed with PVC or PUR material to enhance the strength of the ribbon cable 10.

Although the illustrative embodiments of the present invention have been described above to enable those skilled in the art to understand the present invention, the present invention is not limited to the scope of the embodiments, and it is apparent to those skilled in the art that all the inventive concepts using the present invention are protected as long as they can be changed within the spirit and scope of the present invention as defined and defined by the appended claims.

Claims (11)

1. A flex cable, comprising:

a flex cable, the flex cable comprising:

a plurality of core wire units, the plurality of core wire units being arranged side by side, the number of the plurality of core wire units being 4 or more;

the sheath is wrapped on the peripheries of the core wire units, so that the flat cable is in a flat whole;

the flat cable is wound into a cylindrical structure in a combined mode, and two side edges of the flat cable are abutted or overlapped.

2. The flexspline cable of claim 1, wherein the core wire unit comprises a plurality of conductors and an insulating material covering the conductors.

3. The flex cable of claim 1, wherein said sheath is made of an insulating material.

4. The flex cable of claim 1, wherein the flex cable is filled with filler.

5. The FFC of claim 4, wherein the filler is a filler rod or a filler rope.

6. The flexile flat cable of claim 1, wherein a wrapping layer is disposed outside the flat cable.

7. The FFC of claim 6 wherein the tape layer is a polyester film.

8. A FFC according to claim 6 wherein the tape layer is wrapped longitudinally or wound around the FFC.

9. The flex cable according to claim 1, wherein a shielding layer is disposed outside the flex cable.

10. The flex cable according to claim 1, wherein an outer sheath layer is disposed outside the flat cable.

11. A wire arranging process is characterized by comprising the following steps:

in rows: selecting a plurality of core wire units, putting the core wire units into a flat die, and extruding a sheath outside the core wire units to obtain a flat-structure flat cable;

winding: winding the flat cable into a cylindrical structure in a twisting manner.

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