Tensile self-contraction power line assembly

Abstract

The utility model relates to a tensile self-contraction power line assembly, and aims to improve the tensile capability and the automatic contraction performance of a power line. The power line assembly comprises a power line body and a spring winding box, the power line body is composed of at least one strand of conductor core, an insulating layer, a fiber reinforcing layer and an outer sheath, and the fiber reinforcing layer is made of aramid fibers or fiber materials with similar tensile strength so as to provide longitudinal tensile support and enhance the tensile resistance and durability of the power line. The outer layer is coated with the elastic low-carbon steel wire tensile strip, and the spiral structure of the elastic low-carbon steel wire tensile strip enhances the self-contraction performance of the power line, so that the power line is prevented from being wound, and the use convenience and safety are improved. By accurately controlling material selection and structural design, the high-strength flexible cable can maintain excellent electrical performance and mechanical reliability under the conditions of high stress and frequent bending, and is widely applicable to high-strength use scenes.

Description

Technical Field

[0001] This utility model relates to the field of power cord technology, specifically to a tensile self-shrinking power cord assembly. Background Technology

[0002] In traditional power cord designs, many power cord components employ a simple conductor structure and conventional insulation. These power cords typically consist of a metal conductor, an insulation layer, and an outer sheath, with no special design for tensile strength or shrinkage resistance. To ensure flexibility and durability, traditional designs often rely on relatively simple fiber reinforcement materials or simply thicken the insulation layer to enhance mechanical strength. However, this structure fails to effectively address the stability issues of power cords under high-frequency bending, stretching, or tensile impact, especially during long-term use or under high stress, making them prone to damage or performance degradation.

[0003] Traditional power cord assemblies often rely on simple internal structures, such as wrapping the conductors in a single insulation layer. They typically lack effective self-shrinking mechanisms when not in use, leading to tangled and messy cords that are difficult to store and maintain. Furthermore, while some designs improve tensile strength by increasing the number of conductors or improving insulation thickness, these measures fail to address fatigue damage under high-frequency bending and tensile stress, and still cannot meet the high reliability and long-term stability requirements of modern equipment.

[0004] In view of this, we have studied and improved the existing problems to provide a tensile self-shrinking power cord assembly to solve the current problems. The aim of this technology is to solve the problems and improve its practical value. Utility Model Content

[0005] This utility model relates to a tensile-resistant self-shrinking power cord assembly. Specifically, it relates to a power cord assembly that enhances the tensile strength of the power cord and achieves automatic shrinkage by adding a fiber reinforcement layer and a tensile strip structure. The following is a detailed description of this utility model:

[0006] A tensile-resistant self-shrinking power cord assembly includes: a spring winding box and a power cord body, with one end of the power cord body wound and fixed to the inner side of the spring winding box. The power cord body includes at least one conductor core, with an insulation layer disposed on the outer periphery of the conductor core. A fiber reinforcement layer is embedded between the insulation layer and the conductor core or around the conductor core. The fiber reinforcement layer provides longitudinal tensile support to the conductor core under tensile force and is covered with an outer sheath on the outside of the insulation layer. The fiber reinforcement layer is made of aramid fiber or a fiber material with similar tensile strength.

[0007] By incorporating a fiber reinforcement layer within the power cord body, using aramid fibers or similar tensile strength materials, effective longitudinal tensile support is provided to the conductor core under tension, thereby enhancing the power cord's tensile strength and improving its durability and stability. This structure effectively prevents the power cord from breaking or being damaged under high stress.

[0008] In a preferred embodiment, this invention can be further configured such that a tensile strip is provided between the insulation layer and the outer sheath. The tensile strip is made of elastic low-carbon steel wire and is initially spiral-shaped, with a diameter of 2 mm or less. By adding an elastic low-carbon steel wire tensile strip between the insulation layer and the outer sheath, and configuring it in a spiral shape, the retractability of the power cord can be further enhanced. This design ensures that the power cord can be tightly retracted when not in use, preventing tangling, facilitating storage, and improving ease of use.

[0009] In a preferred embodiment, this invention can be further configured such that the conductor core is composed of multiple strands of fine-diameter metal wires twisted together. These metal wires are high-purity copper wires or high-conductivity copper alloy wires. The multi-strand twisting enhances flexibility and fatigue resistance. By constructing the conductor core as multiple strands of fine-diameter metal wires and using high-purity copper wires or high-conductivity copper alloy wires, the flexibility and fatigue resistance of the power cord can be improved, ensuring that the power cord maintains good conductivity and mechanical properties even under prolonged use and frequent bending, thereby increasing the service life and reliability of the power cord.

[0010] In a preferred embodiment, the present invention can be further configured such that the fiber reinforcing layer is disposed between the outer periphery of the conductor core and the insulating layer, and is distributed around the conductor core, so as to uniformly distribute the tensile force to the fiber reinforcing layer during the stretching process.

[0011] By wrapping the fiber reinforcement layer around the conductor core and distributing it evenly, the tensile force can be effectively and evenly distributed to the fiber reinforcement layer during the stretching process, avoiding localized damage to the conductor core caused by concentrated stress, further improving the tensile and fatigue resistance of the power cord, and ensuring the long-term stable use of the power cord.

[0012] In a preferred embodiment, the present invention can be further configured such that the outer sheath has anti-slip texture and flame-retardant properties. By providing anti-slip texture and flame-retardant properties on the surface of the outer sheath, the safety of the power cord is further improved.

[0013] In a preferred embodiment, this invention can be further configured to: precisely control the cross-sectional area of ​​the conductor core, the number and distribution density of fibers within the reinforcing fiber layer, and the thickness and material selection of the insulation layer and outer sheath, enabling the power cord to maintain stable electrical performance and mechanical reliability under high stress and high-frequency bending conditions. By precisely controlling the cross-sectional area of ​​the conductor core, the number and distribution density of fibers within the reinforcing fiber layer, and rationally selecting the thickness and material of the insulation layer and outer sheath, the power cord can maintain stable electrical performance and mechanical reliability in high-stress and high-frequency bending operating environments, thereby significantly improving the service life, stability, and adaptability of the power cord and meeting the high usage standards of modern equipment for power cords.

[0014] In a preferred embodiment, this utility model can be further configured such that: the power plug includes a protective box and a spring-loaded reel rotatably mounted inside the protective box. The spring-loaded reel provides the driving force for retracting the power cord through a built-in spring. The power plug is connected to the surface of the spring-loaded reel, and the end of the power plug is electrically connected to the end of the power cord body through an electric slip ring arranged on the surface of the spring-loaded reel. By designing the power plug protective box and the built-in spring-loaded reel, the driving force provided by the spring-loaded reel automatically retracts the power cord, ensuring that the power cord can be automatically and neatly retracted after use, avoiding the inconvenience of manual operation. At the same time, the electric slip ring ensures the stability of the electrical performance of the power cord during winding, allowing the power cord to remain neatly stored when not in use, increasing the convenience of storage.

[0015] The beneficial effects achieved by this utility model are as follows:

[0016] 1. In this utility model, by setting a fiber reinforcement layer in the main body of the power cord, using aramid fiber or fiber material with similar tensile strength, it can provide effective longitudinal tensile support to the conductor core under tensile force, thereby enhancing the tensile strength of the power cord and improving its durability and stability.

[0017] 2. In this utility model, by adding an elastic low-carbon steel wire tensile strip between the insulation layer and the outer sheath and setting it into a spiral structure, the shrinkage performance of the power cord can be further enhanced, ensuring that the power cord can be tightly self-retracted when not in use, avoiding tangling, and improving the convenience and service life of the power cord. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model;

[0019] Figure 2 This is one embodiment of the present utility model. Figure 1 A schematic diagram of the structure at point A.

[0020] Figure label:

[0021] 100. Winding box; 110. Power plug;

[0022] 200. Power cord body; 210. Conductor core; 220. Insulation layer; 230. Fiber reinforcement layer; 221. Outer sheath; 240. Tensile strip. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0024] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0025] The following is in conjunction with the appendix Figures 1-2 This invention describes a tensile self-shrinking power cord assembly provided by some embodiments of the present invention.

[0026] A tensile-resistant self-shrinking power cord assembly includes a spring-loaded winding box 100 and a power cord body 200. One end of the power cord body 200 is wound and fixed to the inner side of the spring-loaded winding box 100. The power cord body 200 includes at least one conductor core 210. An insulation layer 220 is disposed around the outer periphery of the conductor core 210. A fiber reinforcement layer 230 is embedded between the insulation layer 220 and the conductor core 210 or around the conductor core 210. The fiber reinforcement layer 230 provides longitudinal tensile support to the conductor core 210 under tensile force, and an outer sheath 221 covers the outside of the insulation layer 220. The fiber reinforcement layer 230 is made of aramid fiber or a fiber material with similar tensile strength. By setting the fiber reinforcement layer 230 inside the power cord body 200 and using aramid fiber or a fiber material with similar tensile strength, longitudinal support can be effectively provided, enhancing the tensile strength of the power cord and improving durability and stability.

[0027] In this embodiment, a tensile strip 240 may be provided between the insulation layer 220 and the outer sheath 221. The tensile strip 240 is made of elastic low-carbon steel wire, and its original state is spiral-shaped. The diameter of the tensile strip 240 is less than or equal to 2 mm. The addition of the elastic low-carbon steel wire tensile strip 240 between the insulation layer 220 and the outer sheath 221, with its spiral structure, enhances the shrinkage performance of the power cord, ensuring that it can tightly retract itself when not in use, preventing tangling.

[0028] In this embodiment, the conductor core 210 is composed of multiple strands of fine-diameter metal wires twisted together. These wires are high-purity copper wires or high-conductivity copper alloy wires. The twisting process enhances flexibility and fatigue resistance. Using high-purity copper wires or high-conductivity copper alloy wires improves the power cord's flexibility and fatigue resistance, ensuring good electrical performance even under frequent bending conditions.

[0029] In this embodiment, the fiber reinforcement layer 230 is disposed between the outer periphery of the conductor core 210 and the insulation layer 220, and is distributed around the conductor core 210 to evenly distribute the tensile force onto the fiber reinforcement layer 230 during the stretching process. By evenly distributing the fiber reinforcement layer 230 around the outer periphery of the conductor core 210, the tensile force is evenly distributed during the stretching process, avoiding localized damage to the conductor core 210 and improving the overall tensile strength.

[0030] In this embodiment, the outer sheath 221 has anti-slip texture and flame-retardant properties, improving the ease of use and safety of the power cord.

[0031] In this embodiment, by precisely controlling the cross-sectional area of ​​the conductor core 210, the number and distribution density of fibers inside the reinforcing fiber layer 230, the thickness and material selection of the insulation layer 220 and the outer sheath 221, the power line can maintain stable electrical performance and mechanical reliability under high stress and high frequency bending conditions.

[0032] In this embodiment, the power plug 110 includes a protective box and a spring reel rotatably mounted inside the protective box. The spring reel provides the driving force for retracting the power cord through a built-in spring. The surface of the spring winding box 100 is connected to the power plug 110. The end of the power plug 110 is electrically connected to the end of the power cord body 200 through an electric slip ring arranged on the surface of the spring reel.

[0033] Among them, by designing a protective box for the power plug 110 and a built-in spring reel, the power cord can be automatically retracted by the retraction force provided by the spring, avoiding tangling and maintaining a stable electrical connection.

[0034] The above embodiments demonstrate the design of the tensile self-shrinking power cord assembly of this invention. By rationally configuring different materials and structures, especially the aramid fiber reinforcement layer, low-carbon steel wire tensile strip, and precise slip ring design, this invention achieves significant results in improving the tensile strength, fatigue resistance, and self-shrinking function of the power cord. It is suitable for various high-stress and frequent bending environments, providing excellent mechanical properties and stable electrical performance.

[0035] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0036] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A tensile-resistant self-shrinking power cord assembly, characterized in that, include: The device includes a winding box (100) and a power cord body (200), with one end of the power cord body (200) being wound and fixed to the inside of the winding box (100). The power cord body (200) includes at least one conductor core (210), with an insulation layer (220) disposed around the outer periphery of the conductor core (210). A fiber reinforcement layer (230) is embedded between the insulation layer (220) and the conductor core (210) or around the conductor core (210). The fiber reinforcement layer (230) provides longitudinal tensile support to the conductor core (210) under tension and is covered with an outer sheath (221) on the outside of the insulation layer (220). The fiber reinforcement layer (230) is made of aramid fiber or a fiber material with similar tensile strength.

2. The tensile self-shrinking power cord assembly according to claim 1, characterized in that, A tensile strip (240) may also be provided between the insulation layer (220) and the outer sheath (221). The tensile strip (240) is an elastic low-carbon steel wire, and the tensile strip (240) is originally spiral in shape. The diameter of the tensile strip (240) is less than or equal to 2 mm.

3. The tensile self-shrinking power cord assembly according to claim 1, characterized in that, The conductor core (210) is composed of multiple strands of fine-diameter metal wires twisted together. The metal wires are high-purity copper wires or high-conductivity copper alloy wires. The twisting of multiple strands improves flexibility and fatigue resistance.

4. The tensile self-shrinking power cord assembly according to claim 1, characterized in that, The fiber reinforcement layer (230) is disposed between the outer periphery of the conductor core (210) and the insulation layer (220), and is distributed around the conductor core (210) so as to evenly distribute the tensile force to the fiber reinforcement layer (230) during the stretching process.

5. The tensile self-shrinking power cord assembly according to claim 1, characterized in that, The outer sheath (221) has anti-slip texture and flame retardant properties.

6. A tensile self-shrinking power cord assembly according to any one of claims 1 to 5, characterized in that, The power plug (110) includes a protective box and a spring reel rotatably mounted inside the protective box. The spring reel provides the driving force for retracting the power cord through a built-in spring. The surface of the spring winding box (100) is connected to the power plug (110). The end of the power plug (110) is electrically connected to the end of the power cord body (200) through an electric slip ring arranged on the surface of the spring reel.

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