Flexible copper core wire and cable

Abstract

The utility model provides a flexible copper core silk covered wire relates to cable technical field, including copper core, silk thread one and silk thread two are spirally wrapped outside copper core, silk thread one and silk thread two are parallel, silk thread one and silk thread two are alternately distributed outside copper core, and the diameter of silk thread one is greater than the diameter of silk thread two, the utility model has the advantages of better flexibility.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular to a flexible copper core wire-wrapped wire. Background Technology

[0002] Silk-insulated wire is a cable structure in which insulating silk threads are densely wound around a copper core. The silk threads are heated to melt and form an insulating film around the copper core. For example... Figure 3 As shown, in the prior art, the wire blank is formed by continuous and dense winding of the insulated wire. After heating, the outer surface is flattened by heat, and then rapidly cooled and dried to form the final shape. Figure 3 Before being heated, this type of silk-wrapped wire has a densely wrapped polymer filament. When the wire is bent, the polymer filament needs to be squeezed (although the outer surface is almost flattened after heating, the overall structure is still distributed in a spiral shape outside the copper core, especially on the side in contact with the copper core surface), which greatly affects the flexibility of the wire and the processability and coil tightness when making coils. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention proposes a copper core wire with better flexibility.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a flexible copper core wire, comprising a copper core, characterized in that the copper core is spirally wrapped with wire one and wire two, wire one and wire two are parallel to each other, wire one and wire two are alternately distributed outside the copper core, and the diameter of wire one is larger than the diameter of wire two.

[0005] Furthermore, the diameter ratio of thread one to thread two is 1.2 to 1.6.

[0006] Compared with existing technologies, the wire obtained by this solution has better flexibility, and the insulation layer of the wire has higher crack resistance when it is tightly wound. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the winding of the insulated wire;

[0008] Figure 2 This is a cross-sectional view of the wire along the plane containing the diameter of the copper core;

[0009] Figure 3 This is a schematic diagram of the structure of a wire in the prior art.

[0010] Legend: 1. Copper core; 2. Wire 1; 3. Wire 2. Detailed Implementation

[0011] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings to further illustrate the technical solutions of the present invention. However, the present invention is not limited to these embodiments.

[0012] like Figure 1 and Figure 2 As shown, the flexible copper core wire includes a copper core 1, and wire 1 2 and wire 2 3 are spirally wrapped around the copper core 1. Wire 1 2 and wire 2 3 are parallel to each other and are alternately distributed outside the copper core 1. The diameter of wire 1 2 is larger than the diameter of wire 2 3.

[0013] The diameter ratio of wire 1 (2) to wire 2 (3) is 1.2 to 1.6. During winding, wire 1 (2) and wire 2 (3) are wound synchronously, but wire 2 (3) with a smaller diameter is wound one turn ahead. Wire 1 (2) with a larger diameter fills the gaps between adjacent turns of wire 2 (3) when it is wound later.

[0014] Compared to existing technologies, the wire obtained by this solution has better flexibility, and the insulation layer of the wire has higher crack resistance when tightly wound. In principle, when wire 2 (3) is close to wire 1 (2), the line connecting the two tangent points of wire 1 (2) is below the axis of wire 1 (2), while the line connecting the two tangent points of wire 2 (3) is above the axis of wire 2 (3). This means that the smaller diameter portion of wire 2 (3) is pressed by wire 1 (2), resulting in a larger bonding surface during hot-melt bonding. In addition, due to the uneven surface, the concave part provides clearance when bending the wire. Furthermore, the increased helical angle of the single wire further improves the flexibility of the wire.

[0015] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A flexible copper core wire, comprising a copper core (1), characterized in that, The copper core (1) is spirally wrapped with wire 1 (2) and wire 2 (3). Wire 1 (2) and wire 2 (3) are parallel. Wire 1 (2) and wire 2 (3) are alternately distributed outside the copper core (1). The diameter of wire 1 (2) is larger than the diameter of wire 2 (3).

2. The flexible copper core wire according to claim 1, characterized in that, The diameter ratio of thread one (2) to thread two (3) is 1.2 to 1.6.

Images