CN221687253U - A bending-resistant four-core twisted-pair cable - Google Patents

Abstract

The utility model relates to the technical field of signal cables, specifically a bending-resistant twisted-pair four-core cable, comprising a pair of twisted-pair wires, two single-core wires and a sheath, wherein the twisted-pair wires and the single-core wires are both arranged in the sheath, the twisted-pair wires and the single-core wires are distributed in a triangular shape and are separated by a T-shaped spacing filler strip, the top surface of the spacing filler strip is formed with a concave first arc surface adapted to the outer wall of the twisted-pair wire, the two included angles of the spacing filler strip are rounded with a second arc surface adapted to the outer wall of the single-core wire, and the three ends of the spacing filler strip are formed with convex filling protrusions that fit the inner wall of the sheath. The utility model improves the toughness of the cable and the ability to recover after bending by adding a spacing filler strip, thereby preventing the cable from being excessively bent and affecting signal transmission, and at the same time, the spacing filler strip is provided with a filling protrusion, which improves the impact resistance of the cable and extends its service life.

Description

A bending-resistant four-core twisted-pair cable

Technical Field

The utility model relates to the technical field of signal cables, in particular to a bending-resistant twisted-pair four-core cable.

Background Art

Shielded cables for electronic computers use high-voltage polyethylene insulation with a small dielectric constant and are formed by twisted pairs, screen pairs, and total layers (or two-wire group twisting, group shielding, group shielding, etc.). They have the characteristics of low dielectric loss, strong transmission capacity, and good anti-interference performance. They can reliably transmit weak analog and digital signals and can be widely used in detection and control computer systems or automation devices in power generation, metallurgy, petroleum, chemical industry, light industry, and other departments, as well as general industrial computers. Existing signal cables generally have a sheath directly covering the signal line and power line. When laying the cables, avoid excessive bending, otherwise it will affect the signal transmission of the signal line.

Utility Model Content

The utility model aims to provide a bending-resistant four-core twisted-pair cable to solve the problems raised in the above-mentioned background technology.

To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a bending-resistant twisted-pair four-core cable, comprising a pair of twisted-pair wires, two single-core wires and a sheath, wherein the twisted-pair wires and the single-core wires are both arranged in the sheath, the twisted-pair wires and the single-core wires are distributed in a triangular shape and are separated by a T-shaped spacer filler strip, the top surface of the spacer filler strip is formed with a concave first arc surface that matches the outer wall of the twisted-pair wire, the two included corners of the spacer filler strip are rounded at transition to a second arc surface that matches the outer wall of the single-core wire, and the three ends of the spacer filler strip are formed with convex filling protrusions that fit the inner wall of the sheath.

Optionally, a first buffer cavity is opened at the center of the spacer filling strip; and a second buffer cavity is opened in each of the three filling protrusions.

Optionally, the twisted pair cable includes two first wire cores, the first wire cores are coated with a first insulating layer on their outer circumferences, and the two first insulating layers are coated with a shielding layer on their outer circumferences.

Optionally, the single-core wire includes a second wire core, and the outer circumference of the second wire core is coated with a second insulation layer.

Optionally, the spacer filling strip is made of rubber or TPE material.

Optionally, the first insulating layer and the second insulating layer are made of FEP material, and the sheath is made of PVC material; the shielding layer is an aluminum foil wrapping tape.

Compared with the prior art, the utility model has the following beneficial effects: the utility model improves the toughness of the cable and the recovery ability after bending by adding a spacer filling strip, thereby preventing the cable from being excessively bent and affecting signal transmission; at the same time, the spacer filling strip is provided with a filling protrusion and a buffer cavity, which can buffer and release force when the cable is subjected to external forces such as squeezing, thereby improving the impact resistance of the cable and extending its service life.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a perspective view of the utility model;

FIG. 2 is an arbitrary cross-sectional view of the present utility model.

In the figure: 1, twisted pair; 11, first core; 12, first insulation layer; 13, shielding layer; 2, single core; 21, second core; 22, second insulation layer; 3, spacer filling strip; 31, first buffer cavity; 32, filling protrusion; 33, second buffer cavity; 34, first arc surface; 35, second arc surface; 4, sheath.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Embodiment: Please refer to Figures 1 and 2. The utility model provides a bending-resistant twisted-pair four-core cable, including a pair of twisted-pair wires 1, two single-core wires 2 and a sheath 4. The twisted-pair wires 1 are used as signal wires, and the two single-core wires 2 are used as power wires. The twisted-pair wires 1 and the single-core wires 2 are both arranged in the sheath 4. Specifically, the twisted-pair wires 1 and the single-core wires 2 are distributed in a triangular shape and are separated by a T-shaped spacing filler strip 3. The spacing filler strip 3 is made of rubber or TPE material. The top surface of the spacer filler strip 3 is formed with a concave first arc surface 34 that matches the outer wall of the twisted pair 1. The two included corners of the spacer filler strip 3 have a second arc surface 35 that matches the outer wall of the single core wire 2. Before the twisted pair 1 and the single core wire 2 are coated, the twisted pair 1 and the single core wire 2 are placed on the first arc surface 34 and the second arc surface 35 of the spacer filler strip 3 respectively to limit the position of the wire core. Since the spacer filler strip 3 has a certain flexibility, it also improves the toughness and recovery ability of the cable after bending, so that the cable can be prevented from being excessively bent and affecting the transmission of signals. In addition, the three ends of the spacer filler strip 3 are formed with convex filling protrusions 32 that fit the inner wall of the sheath 4. The filling protrusions 32 can increase the impact resistance of the cable. When the cable is subjected to external forces such as squeezing, the external force will be partially transmitted to the filling protrusions 32 through the sheath 4 and received by the spacer filler strip 3, so the service life of the cable can be improved.

A triangular first buffer cavity 31 is provided at the center of the spacing filling strip 3, and a circular or elliptical second buffer cavity 33 is provided in each of the three filling protrusions 32. The provision of the buffer cavity can improve the buffering capacity of the cable and prevent the sheath 4 from being directly damaged when the cable is subjected to strong stress.

The twisted pair cable 1 comprises two first cores 11, the outer circumference of the first cores 11 is covered with a first insulating layer 12, and the outer circumference of the two first insulating layers 12 is covered with a shielding layer 13. The single core cable 2 comprises a second core 21, and the outer circumference of the second core 21 is covered with a second insulating layer 22. The core is made of tinned copper wire, the first insulating layer 12 and the second insulating layer 22 are made of FEP material, the sheath 4 is made of PVC material, and the shielding layer 13 is an aluminum foil wrapping tape for anti-interference.

Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. A bending-resistant twisted-pair four-core cable, comprising a pair of twisted-pair wires (1), two single-core wires (2) and a sheath (4), wherein the twisted-pair wires (1) and the single-core wires (2) are both arranged in the sheath (4), characterized in that: the twisted-pair wires (1) and the single-core wires (2) are distributed in a triangular shape and are separated by a T-shaped spacer filler strip (3), the top surface of the spacer filler strip (3) is formed with a concave first arc surface (34) adapted to the outer wall of the twisted-pair wires (1), the two included angles of the spacer filler strip (3) are rounded at transition to a second arc surface (35) adapted to the outer wall of the single-core wires (2), and the three ends of the spacer filler strip (3) are formed with convex filling protrusions (32) adapted to the inner wall of the sheath (4). 2. A bending-resistant twisted-pair four-core cable according to claim 1, characterized in that a first buffer cavity (31) is opened at the center of the spacing filling strip (3); and a second buffer cavity (33) is opened in each of the three filling protrusions (32). 3. A bending-resistant twisted-pair four-core cable according to claim 1, characterized in that: the twisted pair (1) includes two first cores (11), the first cores (11) are coated with a first insulating layer (12) on their outer circumference, and the two first insulating layers (12) are coated with a shielding layer (13) on their outer circumferences. 4. A bending-resistant twisted-pair four-core cable according to claim 3, characterized in that the single-core wire (2) comprises a second core (21), and the outer circumference of the second core (21) is covered with a second insulating layer (22). 5. The bending-resistant twisted-pair four-core cable according to claim 1, characterized in that the spacer filling strip (3) is made of rubber or TPE material. 6. A bending-resistant twisted-pair four-core cable according to claim 4, characterized in that: the first insulating layer (12) and the second insulating layer (22) are made of FEP material, the sheath (4) is made of PVC material; and the shielding layer (13) is an aluminum foil wrapping tape.