Spring cable capable of resetting quickly

Abstract

The utility model relates to a spring cable capable of resetting quickly in the field of cables. The spring cable comprises a memory metal core, and an insulated wire, a wrapping layer, an inner sheath, a memory metal layer and an outer sheath which are sequentially coated on the outer side of the memory metal core from inside to outside. According to the utility model, through the shape memory effect of the memory metal core and the memory metal layer, the memory metal core and the memory metal layer can rapidly recover after reaching a certain temperature, and the spring cable is driven to rapidly reset, so that the convenience of the spring cable is improved, and the service life of the spring cable is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of cables, in particular to a spring cable which can be quickly reset. Background Art

[0002] Spring cables, also known as spiral cables, have good flexibility and elasticity. They can automatically rebound to save space when not in use, making them widely used in communications (telephone, radio), medical technology, electricity, locomotive industry, mechanical engineering, or lighting industries.

[0003] The existing spring cable is shaped by twisting the cable to make the cable have a spring effect. However, after the spring cable is subjected to a large external force or used for a long time, the cable elasticity is weakened and cannot be completely reset. The reset speed is slowed down and cannot be quickly restored. Therefore, the utility model proposes a durable and quickly reset spring cable. Summary of the invention

[0004] The utility model provides a spring cable that can be quickly reset to solve the problems mentioned in the above background technology.

[0005] The purpose of the utility model is achieved by the following methods:

[0006] A spring cable capable of rapid reset comprises a memory metal core and an insulated conductor, a wrapping layer, an inner sheath, a memory metal layer and an outer sheath which are sequentially coated on the outer side of the memory metal core from the inside to the outside.

[0007] Furthermore, a plurality of the insulated wires are provided, and the insulated wires are surrounded on the outside of the memory metal core.

[0008] Furthermore, the insulated wire includes a conductor and a wire shielding layer and an insulating layer which sequentially cover the outside of the conductor from the inside to the outside.

[0009] Furthermore, a filler is provided in the wrapping layer.

[0010] Furthermore, a metal shielding layer is provided between the inner sheath and the wrapping layer.

[0011] The beneficial effects of the utility model are as follows: through the shape memory effect of the memory metal core and the memory metal layer, the memory metal core and the memory metal layer can quickly return to their original state after reaching a certain temperature, driving the spring cable to quickly reset, thereby improving the convenience and service life of the spring cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of a spring cable that can be quickly reset in the utility model;

[0013] Figure 2It is a partial cross-sectional view of a spring cable capable of rapid reset according to the utility model;

[0014] The reference numerals in the figure are: 1-memory metal core, 2-insulated wire, 3-wrapping layer, 4-inner sheath, 5-outer sheath, 6-memory metal layer, 7-conductor, 8-wire shielding layer, 9-insulating layer, 10-filler, 11-metal shielding layer. DETAILED DESCRIPTION

[0015] The present invention will be further described in detail with reference to the accompanying drawings and specific implementation methods.

[0016] In this embodiment, refer to Figure 1-Figure 2 The specific implementation of a spring cable capable of rapid reset includes a memory metal core 1 and an insulated wire 2, a wrapping layer 3, an inner sheath 4, a memory metal layer 6 and an outer sheath 5 which are sequentially wrapped around the outer side of the memory metal core 1 from the inside to the outside. The inner sheath 4 and the outer sheath 5 are made of polyurethane, which has the characteristics of oil resistance, wear resistance, low temperature resistance, aging resistance, elasticity and high hardness.

[0017] Furthermore, the memory metal core 1 and the memory metal layer 6 are made of martensite activated nickel-titanium alloy, which is easy to deform at room temperature (about 25°C) and below, and when it reaches a certain temperature (about 32°C) or above, it will return to a preset shape, so it has shape memory and superelasticity. By setting the original state of the memory metal core 1 and the memory metal layer 6 to the same shape as when the spring is contracted, and using the principle that the cable will heat up during use, the memory metal core 1 and the memory metal layer 6 are heated and restored to the preset shape, and the spring cable is also reset accordingly.

[0018] Furthermore, a plurality of insulated conductors 2 are provided, and the insulated conductors 2 surround the outer side of the memory metal core 1, so that the heat is transferred more quickly and evenly, which helps the memory metal core 1 and the memory metal layer 6 to return to the preset shape more quickly, thereby improving the reset speed.

[0019] Furthermore, the insulated wire 2 includes a conductor 7 and a wire shielding layer 8 and an insulating layer 9 that sequentially cover the outer side of the conductor 7 from the inside to the outside. The wire shielding layer 8 mainly functions to make the electric field on the surface of the conductor 7 uniform, thereby preventing a gap between the conductor 7 and the insulating layer 9 from causing partial discharge. The insulating layer 9 mainly functions to make the electric field on the outer surface of the insulating layer 9 uniform, thereby protecting the insulating layer 9 from damage.

[0020] Furthermore, a filler 10 is provided in the wrapping layer 3. The filler 10 is a mixture of polyester fiber and asbestos, so that the filler 10 has good elasticity, good heat resistance and insulation, thereby playing a better filling and protection role. At the same time, the filler 10 makes the cable more rounded and symmetrical as a whole, and increases the compression resistance of the cable, effectively improving the service life of the cable.

[0021] Furthermore, a metal shielding layer 11 is provided between the inner sheath 4 and the wrapping layer 3. Because the current passing through the cable is relatively large, a magnetic field will be generated around the current. The metal shielding layer 11 can effectively filter out unnecessary electromagnetic waves, reduce interference and damage to the equipment, and the two ends of the metal shielding layer 11 are connected to the ground wire, which can play a certain protective role. If the cable core wire is damaged, the leaked current can flow along the shielding layer such as the grounding grid, which plays a role in safety protection. The metal shielding layer 11 is made of conductive metal material to ensure its good electromagnetic shielding effect.

[0022] The beneficial effects of the utility model are as follows: through the shape memory effect of the memory metal core 1 and the memory metal layer 6, the memory metal core 1 and the memory metal layer 6 can quickly return to their original state after reaching a certain temperature, driving the spring cable to quickly reset, thereby improving the convenience and service life of the spring cable.

[0023] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model is disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiments according to the technology of the utility model, which does not depart from the content of the technical solution of the utility model, belongs to the scope of the technical solution of the utility model.

Claims

1. A spring cable capable of rapid reset, characterized in that: It comprises a memory metal core (1), and an insulated conductor (2), a wrapping layer (3), an inner sheath (4), a memory metal layer (6) and an outer sheath (5) which are sequentially wrapped around the outer side of the memory metal core (1) from the inside to the outside.

2. A spring cable capable of rapid reset according to claim 1, characterized in that: A plurality of the insulated conductors (2) are provided, and the insulated conductors (2) surround the outside of the memory metal core (1).

3. A spring cable capable of rapid reset according to claim 1 or 2, characterized in that: The insulated wire (2) comprises a conductor (7) and a wire shielding layer (8) and an insulating layer (9) which sequentially cover the outside of the conductor (7) from the inside to the outside.

4. A spring cable capable of rapid reset according to claim 1, characterized in that: Fillers (10) are provided between the wrapping layers (3).

5. The spring cable capable of rapid reset according to claim 1, characterized in that: A metal shielding layer (11) is provided between the inner sheath (4) and the wrapping layer (3).

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