Small-size flat telescopic wire and forming method thereof

Abstract

The present invention relates to a small-sized flat telescopic cable and a forming method thereof. The cable comprises a winding wire assembly, a positive power line and a negative power line arranged side by side on the left and right sides of the winding wire assembly, and a sheath covering the outer sides of the winding wire assembly, the positive power line, and the negative power line. The winding wire assembly comprises a plurality of signal lines twisted together into a cable, and the upper and lower surfaces of the sheath are formed with fitting surfaces. The present invention improves the arrangement of the signal control lines of the flat telescopic cable by replacing the parallel-arranged signal control lines with a twisted winding wire assembly, thereby greatly reducing the width of the flat telescopic cable and significantly increasing the number of stretches and service life of the flat telescopic cable.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic products, and in particular to a small-sized flat telescopic wire and a forming method thereof. Background Art

[0002] Data cables are used to connect mobile devices and computers to achieve data transmission or communication purposes. In layman's terms, they are a channel tool that connects computers and mobile devices to transfer videos, ringtones, pictures and other files. They can also be connected to chargers to charge mobile devices. With the rapid development of the electronics industry, data cables have become an indispensable part of our lives.

[0003] Nowadays, traditional data cables can no longer meet the needs of consumers. Storability and portability are increasingly becoming rigid requirements for data cables or charging cables. As a result, retractable cables have emerged. Many electronic devices such as mobile phones and tablets use retractable data cables for data transmission or charging. Retractable data cables have the function of being retractable and retractable. When in use, traditional data cables are too long or too short, which causes inconvenience. However, in order to pursue a better user experience, further reduce the space occupied by the retractable data cable when it is stored, further improve the compactness and portability of the retractable data cable, especially reduce the volume of the retractable cable reel box. Therefore, it is necessary to propose a small-size flat retractable cable and a forming method thereof. Summary of the Invention

[0004] The object of the present invention is to address the deficiencies of the prior art and provide a small-sized flat telescopic wire and a forming method thereof, which can well solve the above-mentioned problems.

[0005] In order to achieve the above requirements, the technical solution adopted by the present invention to solve the technical problem is:

[0006] A small-sized flat retractable cable is provided, comprising a winding cable assembly, and a positive power line and a negative power line arranged side by side on the left and right sides of the winding cable assembly, and a sheath covering the outer sides of the winding cable assembly, the positive power line, and the negative power line; the winding cable assembly comprises a plurality of signal lines twisted together into a cable, and the upper and lower surfaces of the sheath are both formed with fitting surfaces.

[0007] In the small-sized flat telescopic wire of the present invention, two positive power lines and two negative power lines are provided, and the winding wire group and the two positive power lines and the two negative power lines are coplanar.

[0008] In the small-sized flat telescopic cable of the present invention, the positive power supply line and the negative power supply line form a left-right symmetrical structure, and the winding wire group forms a left-right and / or top-bottom symmetrical structure.

[0009] In the small-sized flat telescopic cable of the present invention, there are three or four signal lines.

[0010] In the small-sized flat telescopic cable of the present invention, a first insulating layer is provided between the signal line and the sheath.

[0011] The small-sized flat telescopic wire described in the present invention, wherein the positive power line and the negative power line both include an axial core filling, and multiple wires distributed in an annular manner on the side wall of the axial core filling, and the multiple wires are arranged in multiple layers along the radial direction of the axial core filling.

[0012] In the small-sized flat telescopic cable of the present invention, a second insulating layer is provided between the positive power line, the negative power line and the sheath.

[0013] The small-sized flat telescopic wire of the present invention is provided with anti-slip teeth on the fitting plane along the axial direction of the winding wire group, and the anti-slip teeth are provided in plurality and are evenly arranged along the arrangement direction of the positive power line and the negative power line.

[0014] In the small-sized flat telescopic cable of the present invention, the sheath is flat, and the positive power line, the negative power line, and the winding wire group are arranged along the length direction of the cross section of the sheath.

[0015] A method for forming a small-sized flat telescopic wire is also provided, the method comprising the following steps:

[0016] Wire twisting: twisting the multiple copper conductors used for the signal line, the negative power line, and the positive power line with a small lay length to form single-strand conductors and the negative power line and the positive power line respectively;

[0017] Insulation treatment: performing insulation treatment on the single-strand conductor, the positive power line and the negative power line respectively;

[0018] Cabling: twisting the plurality of single-strand conductors that have been coated with rubber to form the spirally wound wire group;

[0019] Sheath molding: the winding wire group and the positive and negative power lines are kept coplanar in the longitudinal direction and are synchronously passed through the square mold encapsulation port of the extruder to form the sheath.

[0020] The beneficial effects of the present invention are: improving the arrangement of the signal control wires of the flat telescopic cable, changing the parallel arrangement of the signal control wires into a winding wire group twisted into a cable, thereby greatly reducing the width of the flat telescopic cable and greatly increasing the number of stretching times and service life of the flat telescopic cable, and the number of stretching times can be increased from the original thousand times to ten thousand times. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below with reference to the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive efforts.

[0022] Figure 1 This is a schematic diagram of the structural arrangement of the small-sized flat telescopic cable of the present invention when the winding wire group has three signal wires.

[0023] Figure 2 This is a schematic diagram of the structural arrangement of the small-sized flat telescopic cable of the present invention when the winding wire group has four signal wires.

[0024] Figure 3 This is a cross-sectional view of a small-sized flat telescopic cable according to the present invention when the wound cable group has three signal wires.

[0025] Figure 4 This is a cross-sectional view of the small-sized flat telescopic cable of the present invention when the wound wire group has four signal wires.

[0026] Figure 5 This is a flow chart of the forming method of the small-sized flat telescopic wire of the present invention. DETAILED DESCRIPTION

[0027] The terms "first," "second," "third," and "fourth," etc., in the specification, claims, and accompanying drawings of the present invention are used to distinguish between different items, not to describe a specific order. Furthermore, the terms "including," "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements, but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.

[0028] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute a separate or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0029] "Multiple" refers to two or more. "And / or" describes the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0030] Moreover, the terms "up, down, left, right, upper end, lower end, longitudinal" and the like indicating directions are all based on the posture and position of the device or apparatus described in this solution during normal use.

[0031] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the following will be a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work shall fall within the scope of protection of the present invention.

[0032] The small-sized flat telescopic wire of the preferred embodiment of the present invention is as follows: Figure 1-4 As shown, it includes a winding wire group 1, and a positive power line 2 and a negative power line 3 arranged side by side on the left and right sides of the winding wire group 1, and also includes a sheath 4 wrapped around the outside of the winding wire group 1, the positive power line 2 and the negative power line 3. Specifically, the sheath 4 is an insulating plastic and is overmolded by an extruder; wherein, the winding wire group 1 includes a plurality of signal wires 101 that are axially twisted together to form a cable, and the traditional parallel arrangement of signal control wires is changed into a twisted winding wire group 1, which improves the arrangement of the signal control wires of the flat telescopic cable, thereby greatly reducing the width of the flat telescopic cable and greatly increasing the number of stretching times and service life of the flat telescopic cable. In addition, the upper and lower surfaces of the sheath 4 are formed with fitting planes 5 to facilitate the fitting and winding of the telescopic cable as a whole, thereby ensuring stability and compactness after winding.

[0033] Preferably, there are two positive power lines 2 and two negative power lines 3, and the winding wire group 1 and the two positive power lines 2 and the two negative power lines 3 are all coplanar, so that the power transmission is guaranteed while increasing the overall firmness and tensile resistance.

[0034] Preferably, the positive power line and the negative power line form a left-right symmetrical structure, and the winding wire group forms a left-right and / or top-bottom symmetrical structure, wherein three or four signal lines are provided. When three signal lines are provided, a left-right symmetrical structure is formed, and when four signal lines are provided, a left-right and top-bottom symmetrical structure is formed. Different arrangement methods can be selected according to different application conditions.

[0035] Preferably, a first insulating layer 6 is provided between the signal line and the sheath 4 to provide protective insulation.

[0036] Preferably, the positive power line 2 and the negative power line 3 both include an axial core filling a1, and multiple wires a2 distributed in a ring shape on the side wall of the axial core filling a1. Generally, the axial core filling is a fiber material with excellent toughness, and the multiple wires a2 are arranged in a spiral. The multiple wires a2 are arranged in multiple layers along the radial direction of the axial core filling a1, that is, a multi-layer structure is formed from the inside to the outside to ensure the stability of power transmission. Among them, the axial core filling a1 can be selected from a material with strong tensile resistance and flexibility. In addition, the signal line 101 is also used in the same way.

[0037] Preferably, a second insulating layer is provided between the positive power line 2 and the negative power line 3 and the sheath 4 to provide protective insulation. The second insulating layer can be formed of insulating varnish or an extruded insulating plastic layer.

[0038] Preferably, anti-slip teeth 8 are provided on the fitting plane 5 along the axial direction of the winding wire group 1. There are multiple anti-slip teeth 8 and they are evenly arranged along the arrangement direction of the positive power line 2 and the negative power line 3 to ensure that the adjacent parts of the telescopic wire from the inside to the outside do not slip after winding and sorting, and it is also convenient for users to take it.

[0039] Preferably, the sheath 4 is flat, and its side walls can be arc-shaped or flat. The present solution specifically adopts a plane to be rectangular. The positive power line 2, the negative power line 3 and the winding wire group 1 are arranged along the length direction of the cross section of the sheath to ensure the compactness of the arrangement and the regular and neat appearance of the finished product. In addition, the square structure is also more conducive to winding.

[0040] The forming method of the small-sized flat telescopic wire of the preferred embodiment of the present invention is as follows: Figure 5 As shown, the method includes the following steps:

[0041] Wire twisting S10: Multiple copper conductors used for signal lines, negative power lines, and positive power lines are twisted with a small lay length to form single-strand conductors and negative power lines and positive power lines respectively;

[0042] Insulation treatment S20: The single-strand conductor and the positive power line and the negative power line are respectively subjected to rubber-coated insulation treatment;

[0043] Cabling process S30: twisting the multiple coated single-strand conductors to form a spirally wound wire group;

[0044] Sheath molding S40: Keep the winding wire group and the positive and negative power lines coplanar longitudinally and pass them through the square mold rubber port of the extruder synchronously to finally form the sheath.

[0045] The above method can ensure the yield of the sheath 4, avoid bulges or depressions in local parts of the sheath 4, and ensure that the distance between the outer surface of the sheath 4 and the winding component is balanced and the same everywhere, which can further improve the appearance of the product and is more conducive to product promotion.

[0046] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A small-sized flat telescopic cable, characterized in that: The device comprises a winding wire assembly, a positive power line and a negative power line arranged side by side on the left and right sides of the winding wire assembly, and a sheath covering the outer sides of the winding wire assembly, the positive power line and the negative power line; the winding wire assembly comprises a plurality of signal lines twisted together into a cable, and the upper and lower surfaces of the sheath are both formed with a fitting surface; There are two positive power lines and two negative power lines, and the winding wire group and the two positive power lines and the two negative power lines are all coplanar; The positive power line and the negative power line form a left-right symmetrical structure, and the winding wire group forms a left-right and / or top-bottom symmetrical structure; The sheath is flat, and the positive power line, the negative power line, and the winding wire group are arranged along the length direction of the cross section of the sheath; The positive power line and the negative power line each include a core filling and a plurality of conductors annularly distributed on a side wall of the core filling, wherein the plurality of conductors are arranged in multiple layers along a radial direction of the core filling; The bonding plane is provided with anti-slip teeth along the axial direction of the winding wire group, and the anti-slip teeth are provided in plurality and are evenly arranged along the arrangement direction of the positive power line and the negative power line; The method for forming the small-sized flat telescopic wire comprises the following steps: Wire twisting: twisting the multiple copper conductors used for the signal line, the negative power line, and the positive power line with a small lay length to form single-strand conductors and the negative power line and the positive power line respectively; Insulation treatment: performing insulation treatment on the single-strand conductor, the positive power line and the negative power line respectively; Cabling: twisting the plurality of single-strand conductors that have been coated with rubber to form the spirally wound wire group; Sheath molding: keep the winding wire group and the positive and negative power lines coplanar in the longitudinal direction and pass them synchronously through the square mold encapsulation port of the extruder to form the sheath.

2. The small-sized flat telescopic wire according to claim 1, characterized in that: There are three or four signal lines.

3. The small-sized flat telescopic wire according to claim 2, characterized in that: A first insulating layer is provided between the signal line and the sheath.

4. The small-sized flat telescopic cable according to claim 1, characterized in that: A second insulating layer is provided between the positive power line, the negative power line and the sheath.

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