Electrocardio lead wire

Abstract

The utility model relates to the technical field of electric leads, in particular to an electrocardio lead wire which is of a flat cable structure comprising a plurality of leads arranged side by side. Each wire sequentially comprises a conductor, an insulating layer, a noise reduction layer and a shielding layer from inside to outside. And forming an outer coating layer outside the plurality of wires to form the flat cable structure. The utility model aims to provide the low-noise electrocardiogram lead wire.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric conductive wire, in particular to an electrocardiogram lead wire. BACKGROUND

[0002] With the improvement of people's living standards, the concern for health is getting higher and higher, physical examination and health monitoring become particularly common, and therefore the demand for electrocardiogram lead wire for electrocardiogram monitoring has been growing.

[0003] The traditional electrocardiogram lead wire still faces a big challenge in noise control, and the traditional electrocardiogram lead wire often ignores the actual application, especially the skin-friendly aspect of the wire and the tearing of the wire during application. CONTENT OF THE INVENTION

[0004] The present application aims to provide a low-noise electrocardiogram lead wire.

[0005] In order to achieve the above-mentioned purpose of the application, the present application provides an electrocardiogram lead wire, which is a flat cable structure comprising a plurality of lead wires arranged side by side; the lead wire is sequentially composed of a conductor, an insulating layer, a noise reduction layer and a shielding layer from the inside to the outside; an outer sheath layer is formed outside the plurality of lead wires to form the flat cable structure.

[0006] Preferably, the conductor is formed by concentrically twisting a plurality of tinned soft copper conductors.

[0007] Further, the tinned soft copper conductor of the conductor adopts three-layer twisting, and the number of tinned soft copper conductors of the outer layer is an integer multiple of the number of tinned soft copper conductors of the inner layer.

[0008] Further, the diameter of the tinned soft copper conductor is not greater than 0.01mm; the twisted pitch of the outermost tinned soft copper conductor is 10 times its diameter.

[0009] Preferably, the insulating layer is a polypropylene layer.

[0010] Preferably, the noise reduction layer is a semi-conductive polyethylene layer formed by co-extrusion.

[0011] Preferably, the shielding layer is formed by winding a tinned soft copper conductor.

[0012] Preferably, the outer sheath layer is formed by co-extrusion of a thermoplastic rubber elastomer TPV with the lead wire by an extrusion method.

[0013] From the above, the application can obtain the following beneficial effects: the application adopts the flat cable structure, each wire structure in the interior is completely same, each wire has independent insulation layer, noise reduction layer and shielding layer, each core wire is used as independent signal transmission channel, and has no any influence between each other; the insulation layer adopts modified polypropylene, has lower dielectric constant, can ensure that the signal transmission has lower attenuation, and has more excellent mechanical property than other similar materials; the noise reduction layer adopts semi-conductive polyethylene material, the semi-conductive polyethylene material is mixed by polyethylene and conductive carbon black, has high electric conductivity and low noise performance; the shielding layer completely covers the noise reduction layer, ensures the softness of the wire, and improves the anti-electric signal interference ability of the wire; the sheath layer adopts thermoplastic rubber elastomer TPV, has high elasticity, skin-friendly and biological compatibility. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application or the prior art. Obviously, the drawings in the following description are only part of the embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor under the premise of the drawings.

[0015] Figure 1 The structure of the ECG lead wire of the embodiments of the present application is shown in the figure. DETAILED DESCRIPTION

[0016] The technical solutions of the embodiments of the present application will be described clearly and completely in the following combined with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0017] EMBODIMENTS

[0018] The traditional ECG lead wire is still a big challenge for noise control, and the traditional ECG lead wire often ignores the actual application, especially the skin-friendly of the wire and the tearing of the wire during application.

[0019] To solve the above technical problems, the embodiment provides a heart electrocardiogram lead wire, which is a flat cable structure formed by arranging a plurality of lead wires side by side. The number of lead wires can be five, which is commonly used in electrocardiogram lead wires, or can be adjusted to other numbers such as three, four, six or more according to the needs of the use occasion. The lead wires are placed in parallel after the shielding layer 40 is completed. The outer covering material is tightly attached to each individually shielded lead wire at one time by extrusion, so that each lead wire is only attached together to form a multi-core flat cable structure without connection.

[0020] The internal structure of the above-mentioned lead wire is completely the same, and each lead wire has a separate insulating layer 20, a noise reduction layer 30 and a shielding layer 40. Each lead wire serves as an independent signal transmission channel and has no effect on each other.

[0021] Specifically, the lead wire is composed of a conductor 10, an insulating layer 20, a noise reduction layer 30 and a shielding layer 40 from inside to outside. An outer covering layer 50 is formed outside the plurality of lead wires to form a flat cable structure.

[0022] Among them, the conductor 10 is formed by concentrically twisting a plurality of tinned soft copper conductors 10, and is twisted into three layers, and the number of tinned soft copper conductors 10 in the outer layer is an integer multiple of the number of tinned soft copper conductors 10 in the inner layer. For example, the number of tinned soft copper conductors 10 is 19, one in the center, six in the second layer, and twelve in the outermost layer. The above-mentioned three-layer composite structure makes the twisted conductor 10 have higher roundness and more stable structure.

[0023] In order to meet the needs of electrocardiogram lead wires, the diameter of the tinned soft copper conductor 10 is not greater than 0.01 mm, and the pitch diameter of the outermost tinned soft copper conductor 10 is 10 times its diameter. The use of single wire with a diameter of not more than 0.01 mm and a pitch diameter ratio of 10 times makes the twisted wire have higher flexibility and fatigue resistance, while ensuring lower noise during use.

[0024] On the insulating layer 20 of the conductor 10, a modified polypropylene material is used, which has a lower dielectric constant, so that the wire has lower attenuation loss during signal transmission. At the same time, the material has excellent elongation and tensile strength, and also has the characteristics of high hardness, which can make the insulating thickness thinner, ensure its long service life, and make it have smaller size and lighter weight.

[0025] In order to realize the noise reduction function of the application, the noise reduction layer 30 of the embodiment is formed by co-extrusion of semi-conductive polyethylene material. The semi-conductive polyethylene material is mainly composed of polyethylene and conductive carbon black, and is uniformly and closely attached to the surface of the insulating layer 20 by extrusion. It can not only completely cover the insulating core wire, but also ensure easy peeling during customer application processing. Since it contains conductive carbon black, it has good electrical conductivity, which can not only ensure lower noise in actual use, but also shield external interference signals.

[0026] Since the wires are arranged side by side, in order to avoid signal interference between adjacent wires, the shielding layer 40 of the embodiment is formed by winding the tinned soft copper conductor 10. Each wire is shielded separately to ensure that the wire is not disturbed by external signals and effectively avoids mutual interference between the wires in the group. At the same time, the tinned soft copper conductor 10 has a single wire diameter of 0.08 mm, and the noise reduction layer 30 is completely covered by winding to achieve a shielding coverage of 100%, so that the wire has higher shielding effectiveness. In addition, the winding shielding makes the wire more flexible and has a smaller bending radius. At the same time, when the wire is used in actual application, although it is repeatedly bent and twisted, the shielding effectiveness of the wire can still be guaranteed.

[0027] After the preparation of the whole wire is completed, an outer layer 50 needs to be co-extruded outside the wire. The outer layer 50 of the embodiment is formed by co-extrusion of thermoplastic rubber elastomer TPV with the wire by extrusion. It has high elasticity, skin-friendliness and biocompatibility.

[0028] The thermoplastic rubber elastomer TPV has excellent mechanical strength of polyolefin and high elasticity of rubber, which can not only provide better protection for the core wire after covering the core wire, but also ensure that each core wire can be easily torn and applied separately when the wire is applied. Moreover, the material hardness is only 75A, the surface has a slight frosted feeling, and meets the requirements of biocompatibility of medical-grade external wires, ensuring that the wire is safer and more skin-friendly when in contact with the human body surface during application.

[0029] In summary, the electrocardiogram lead wire provided by the embodiment adopts a wire arrangement structure, each internal lead wire structure is completely identical, each has a separate insulation layer, a noise reduction layer and a shielding layer, each core wire serves as an independent signal transmission channel and has no influence on each other; the insulation layer adopts modified polypropylene, has a lower dielectric constant, can ensure that the signal transmission has a lower attenuation, and has more excellent mechanical properties than other similar materials; the noise reduction layer adopts a semi-conductive polyethylene material, the semi-conductive polyethylene material is mixed by polyethylene and conductive carbon black, has high conductivity and low noise performance; the shielding layer completely covers the noise reduction layer, ensures the softness of the wire and improves the anti-electric signal interference capability of the wire; the outer layer adopts a thermoplastic rubber elastomer TPV, has high elasticity, skin-friendliness and biocompatibility.

[0030] The above-described embodiments do not constitute a limitation on the protection scope of the technical solutions. Any modification, equivalent replacement and improvement made within the spirit and principles of the above-described embodiments shall be included in the protection scope of the technical solutions.

Claims

1. An electrocardiograph lead wire, characterized by: The cable structure comprises a plurality of wires arranged side by side; the wires are sequentially provided with a conductor, an insulation layer, a noise reduction layer and a shielding layer from inside to outside; and an outer covering layer is formed outside the wires to form the cable structure.

2. The electrocardiograph lead wire of claim 1, wherein: The conductor is formed by concentrically twisting a plurality of tinned soft copper conductors.

3. The electrocardiograph lead wire of claim 2, wherein: The tinned soft copper conductors of the conductor are twisted in three layers, and the number of the tinned soft copper conductors of the outer layer is an integer multiple of the number of the tinned soft copper conductors of the inner layer.

4. The electrocardiograph lead wire of claim 3, wherein: The diameter of the tinned soft copper conductor is not greater than 0.01 mm; and the twisted pitch of the tinned soft copper conductor of the outermost layer is 10 times of the diameter.

5. The electrocardiograph lead wire of claim 1, wherein: The insulation layer is a polypropylene layer.

6. The electrocardiograph lead wire of claim 1, wherein: The noise reduction layer is a semi-conductive polyethylene layer formed by co-extrusion.

7. The electrocardiograph lead wire of claim 1, wherein: The shielding layer is formed by winding a tinned soft copper conductor.

8. The electrocardiograph lead wire of claim 1, wherein: The outer covering layer is formed by co-extrusion of a thermoplastic rubber elastomer TPV and the wires by an extrusion method.

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