Anti-interference flat type blood oxygen detection lead cable

Abstract

The application provides an anti-interference flat type blood oxygen detection lead cable, and relates to the field of cables.The cable comprises four signal core wires, two ground wires and a double-layer sheath structure, the four signal core wires and the two ground wires are horizontally and parallelly coated inside the double-layer sheath structure, the signal core wire comprises a tinned copper wire stranded core conductor and an insulating layer coated outside the core conductor, the double-layer sheath structure is flat and comprises a semi-conductive inner sheath and an outer sheath, the semi-conductive inner sheath is coated outside the four signal core wires and the two ground wires, and the outer sheath is coated outside the semi-conductive inner sheath.The application adopts the combination scheme of the tinned copper wire stranded conductor, the insulating layer, the semi-conductive inner sheath and the outer sheath, realizes the improvement of signal transmission stability and the enhancement of anti-interference ability through the specific arrangement of the four-core double-ground structure and the double-layer sheath design, and simultaneously, the flat structure design makes the lead cable have the flexibility and the anti-kinking characteristics.

Description

Technical Field

[0001] This utility model relates to the field of cables, and in particular to an anti-interference flat blood oxygen detection lead cable. Background Technology

[0002] Blood oxygen saturation (SpO2) monitoring is a key vital sign detection method in clinical medicine, widely used in operating rooms, ICUs, and home monitoring scenarios. Traditional blood oxygen monitoring equipment relies on photoelectric sensors (such as finger clip probes) to transmit photoelectric pulse wave (PPG) signals to the host unit via cables for processing.

[0003] However, traditional pulse oximetry leads have the following drawbacks: the round wires are prone to tangling and have poor compatibility with equipment interfaces; ordinary insulation materials are prone to electrostatic interference; and the lack of effective shielding between multi-core wires leads to signal crosstalk. Utility Model Content

[0004] In view of the above problems, this utility model embodiment is proposed to provide an anti-interference flat blood oxygen detection lead cable that overcomes or at least partially solves the above problems.

[0005] An anti-interference flat blood oxygen detection lead cable includes four signal core wires, two ground wires, and a double-layer sheath structure. The four signal core wires and the two ground wires are horizontally arranged and wrapped inside the double-layer sheath structure.

[0006] The signal core wire includes a core conductor made of tinned copper wire stranded together and an insulating layer covering the outside of the core conductor;

[0007] The double-layer sheath structure is flat and includes a semi-conductive inner sheath and an outer sheath; the semi-conductive inner sheath covers the outside of the four signal core wires and the two ground wires; the outer sheath covers the outside of the semi-conductive inner sheath.

[0008] Preferably, both the core conductor and the ground wire are formed by twisting together 25 0.05mm tin-plated copper wires.

[0009] Preferably, the insulating layer is made of PP material and covers the outside of the core conductor to form the signal core wire with a diameter of 0.56±0.02mm.

[0010] Preferably, the semi-conductive inner sheath is made of semi-conductive TPE material; the outer sheath is made of medical-grade PVC material.

[0011] Preferably, the cross-sectional dimensions of the semiconductive inner sheath are 1.07×4.02mm and the Shore hardness is 50±5A; the cross-sectional dimensions of the outer sheath are 1.07×4.02mm and the Shore hardness is 60±3A.

[0012] Preferably, the volume resistivity of the semiconductive inner sheath material is 10^3-10^5 Ω·cm.

[0013] Preferably, the four signal core wires are attached in pairs; the two ground wires are symmetrically distributed on both sides of one of the attached signal core wires.

[0014] Preferably, the outer surface of the outer sheath is provided with anti-slip texture, and its coefficient of friction is 0.3-0.5.

[0015] Preferably, a transition adhesive layer is provided between the semiconductive inner sheath and the outer sheath.

[0016] This application specifically includes the following advantages:

[0017] In the embodiments of this application, four signal core wires, two ground wires, and a double-layer sheath structure are used. The four signal core wires and the two ground wires are horizontally arranged side by side and wrapped inside the double-layer sheath structure. The signal core wires include core conductors made of tinned copper wire stranded together and an insulating layer covering the core conductors. The double-layer sheath structure is flat and includes a semi-conductive inner sheath and an outer sheath. The semi-conductive inner sheath covers the four signal core wires and the two ground wires. The outer sheath covers the outer part of the semi-conductive inner sheath. This application, through a specific arrangement of a four-core dual-ground structure combined with a double-layer sheath design, and using a combination of tinned copper wire stranded conductors, an insulating layer, a semi-conductive inner sheath, and an outer sheath, achieves improved signal transmission stability and enhanced anti-interference capability. At the same time, the flat structure design makes the conductors both flexible and kink-resistant. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this application, the drawings used in the description of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the anti-interference flat blood oxygen detection lead cable of this utility model;

[0020] Reference numerals: 1. Signal core wire; 11. Core wire conductor; 12. Insulation layer; 2. Ground wire; 3. Double-layer sheath structure; 31. Semi-conductive inner sheath; 32. Outer sheath. Detailed Implementation

[0021] To make the objectives, features, and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0022] Reference Figure 1 The diagram shows a structural schematic of an anti-interference flat blood oxygen detection lead cable of the present invention, which may specifically include the following structure: four signal core wires 1, two ground wires 2 and a double-layer sheath structure 3, wherein the four signal core wires 1 and the two ground wires 2 are horizontally arranged and wrapped inside the double-layer sheath structure 3.

[0023] The signal core wire 1 includes a core conductor 11 made of tinned copper wire stranded together and an insulating layer 12 covering the outside of the core conductor 11;

[0024] The double-layer sheath structure 3 is flat and includes a semi-conductive inner sheath 31 and an outer sheath 32; the semi-conductive inner sheath 31 covers the outside of the four signal core wires 1 and the two ground wires 2; the outer sheath 32 covers the outside of the semi-conductive inner sheath 31.

[0025] In the embodiments of this application, four signal core wires 1, two ground wires 2, and a double-layer sheath structure 3 are used. The four signal core wires 1 and the two ground wires 2 are horizontally arranged and wrapped inside the double-layer sheath structure 3. The signal core wire 1 includes a core conductor 11 made of tinned copper wire stranded together and an insulating layer 12 covering the core conductor 11. The double-layer sheath structure 3 is flat and includes a semi-conductive inner sheath 31 and an outer sheath 32. The semi-conductive inner sheath 31 covers the four signal core wires 1 and the two ground wires 2. The outer sheath 32 covers the semi-conductive inner sheath 31. This application, through a specific arrangement of a four-core dual-ground structure combined with a double-layer sheath design, and using a combination of tinned copper wire stranded conductors, an insulating layer 12, a semi-conductive inner sheath 31, and an outer sheath 32, achieves improved signal transmission stability and enhanced anti-interference capability. At the same time, the flat structure design makes the conductor both flexible and kink-resistant.

[0026] The following will further describe an anti-interference flat blood oxygen detection lead cable in this exemplary embodiment.

[0027] In this embodiment, the lead wire includes four horizontally arranged signal core wires 1, two ground wires 2, and a double-layer sheath structure 3. The overall structure is flat. Compared to existing circular wires, flat lead wires are prone to tangling and have poor compatibility with device interfaces. Its ultra-thin design makes the lead wire less prone to tangling and improves interface compatibility while also possessing flexibility, torque resistance, and enhanced bending resistance. The signal core wires 1 include a core conductor 11 made of tinned copper wire stranded together and an insulating layer 12 covering the core conductor 11. This ensures stable signal transmission while improving anti-interference strength and reducing signal crosstalk. The double-layer sheath structure 3 includes a semi-conductive inner sheath 31 and an outer sheath 32. The semi-conductive inner sheath 31 covers the four signal core wires 1 and the two ground wires 2; the outer sheath 32 covers the semi-conductive inner sheath 31. The semiconductive inner sheath 31 can absorb high-frequency noise and suppress surface current, improving the signal-to-noise ratio and significantly enhancing the reliability of the signal line. Together with the internal signal core wire 1 and ground wire 2, it forms the conductor body, thereby improving signal transmission stability and enhancing anti-interference capabilities.

[0028] As an example, both the aforementioned core conductor 11 and the ground wire 2 are formed by twisting together 25 0.05mm tinned copper wires, resulting in a DC resistance of ≤3.2Ω / m for the signal core wire 1 and ground wire 2, which reduces power loss and signal attenuation. The four signal core wires 1 are marked with different colors (green, white, red, and orange) for easy interface connection.

[0029] As an example, the aforementioned insulating layer 12 is made of PP material and covers the outside of the core conductor 11, forming the signal core wire 1 with a thickness of 0.56±0.02mm. The PP insulating layer 12, with a thickness of 0.15mm, has a dielectric strength ≥25kV / mm, providing high insulation performance, improving anti-interference capability, and reducing signal crosstalk.

[0030] As an example, the aforementioned semi-conductive inner sheath 31 is made of semi-conductive TPE material with a cross-sectional dimension of 1.07 × 4.02 mm and a Shore hardness of 50 ± 5 A, stabilizing the surface resistivity at 10^3-10^5 Ω·m. The outer sheath 32 is made of medical-grade PVC material (compliant with ISO 10993-5 cytotoxicity testing), with a cross-sectional dimension of 1.07 × 4.02 mm and a Shore hardness of 60 ± 3 A. This double-layer sheath structure 3, with the aforementioned parameters, improves bending resistance and tensile strength of the cable, resulting in a cable with moderate hardness that does not affect medical personnel's operation, significantly enhancing the reliability, lifespan, and performance of the signal cable.

[0031] As an example, the four signal core wires 1 are arranged in pairs; the two ground wires 2 are symmetrically distributed on both sides of one of the pairs of signal core wires 1. The signal core wires 1 and ground wires 2 are arranged to form a linear array. The symmetrically distributed ground wires 2 help to provide a balanced reference and shielding for the signal lines, reduce the influence of external electromagnetic interference on the differential signal, and effectively shield crosstalk between the signal core wires 1, thereby improving signal integrity and anti-interference capability.

[0032] As an example, the outer surface of the aforementioned outer sheath 32 is provided with anti-slip textures, with a coefficient of friction of 0.3-0.5. The anti-slip textures increase surface roughness, enhancing friction when gripped manually or held with tools, preventing slippage during insertion and thus avoiding operational errors. Furthermore, this coefficient of friction not only provides basic anti-slip properties but also makes it suitable for high-vibration, tilted, or contaminated environments, ensuring strong adhesion and preventing slippage due to environmental factors.

[0033] As an example, a transition adhesive layer is provided between the aforementioned semiconductive inner sheath 31 and the outer sheath 32 to improve the tightness of the connection between the inner and outer sheaths 32, prevent delamination, and thus resist mechanical stress. The semiconductive inner sheath 31 is used to homogenize the electric field intensity on the conductor surface, while the outer sheath 32 is the insulating layer 12. The transition adhesive layer can optimize the gradient change of the dielectric properties of the two, avoid partial discharge or breakdown caused by electric field concentration, and smooth the electric field transition. At the same time, the adhesive layer can fill micro-gaps or uneven areas, reduce the sudden change in conductivity at the interface, and improve the insulation reliability.

[0034] In one specific embodiment, the core conductor 11 and the ground wire 2 are each made of 25 strands of 0.05mm tinned copper wire, with a DC resistance ≤3.2Ω / m; the core conductor 11 is covered with a PP insulation layer 12 to form a signal core wire 1, the PP insulation layer 12 has a dielectric strength ≥25kV / mm and a thickness of 0.15mm; the four signal core wires 1 are attached in pairs, and the two ground wires 2 are arranged horizontally on both sides of the two attached signal core wires 1; then the entire structure is covered with a carbon black filled TPE inner sheath with a volume resistivity of 5×10^3Ω·cm; and a medical PVC outer sheath 32 is covered with the inner sheath to form a 1.83×4.78mm flat conductor.

[0035] The resulting anti-interference flat pulse oximetry lead cable has the following advantages:

[0036] 1. The flat structure significantly improves bending resistance (test life ≥ 100,000 cycles).

[0037] 2. The semiconductive layer stabilizes the surface resistance at 10^3-10^5 Ω·m.

[0038] 3. Dielectric constant ≤ 2.8@1MHz, signal attenuation reduced by 42%.

[0039] 4. The tensile strength of the wire is ≥80N, which meets the YY 0505-2012 standard.

[0040] Beneficial effects of the embodiments in this application:

[0041] By employing a specially arranged four-core dual-ground structure combined with a double-layer sheath design, and utilizing a combination of 25 / 0.05mm tinned copper wire conductors, PP insulation layer 12, semi-conductive inner sheath 31, and 60A hardness PVC outer sheath 32, signal transmission stability and anti-interference capabilities are improved. The flat structure (1.83×4.78mm) combines flexibility and kink resistance, and the white outer sheath conforms to medical equipment color specifications.

[0042] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0043] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0044] The above provides a detailed description of the anti-interference flat blood oxygen detection lead cable provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An anti-interference flat pulse oximetry lead cable, characterized in that, It includes four signal core wires, two ground wires, and a double-layer sheath structure. The four signal core wires and the two ground wires are horizontally arranged and wrapped inside the double-layer sheath structure. The signal core wire includes a core conductor made of tinned copper wire stranded together and an insulating layer covering the outside of the core conductor; The double-layer sheath structure is flat and includes a semi-conductive inner sheath and an outer sheath; the semi-conductive inner sheath covers the outside of the four signal core wires and the two ground wires; the outer sheath covers the outside of the semi-conductive inner sheath.

2. The anti-interference flat pulse oximetry lead cable according to claim 1, characterized in that, Both the core conductor and the ground wire are formed by twisting together 25 0.05mm tin-plated copper wires.

3. The anti-interference flat pulse oximetry lead cable according to claim 2, characterized in that, The insulating layer is made of PP material and covers the outside of the core conductor to form the signal core wire with a diameter of 0.56±0.02mm.

4. The anti-interference flat pulse oximetry lead cable according to claim 3, characterized in that, The semi-conductive inner sheath is made of semi-conductive TPE material; the outer sheath is made of medical PVC material.

5. The anti-interference flat pulse oximetry lead cable according to claim 4, characterized in that, The cross-sectional dimensions of the semiconductive inner sheath are 1.07×4.02mm, and the Shore hardness is 50±5A; the cross-sectional dimensions of the outer sheath are 1.07×4.02mm, and the Shore hardness is 60±3A.

6. The anti-interference flat pulse oximetry lead cable according to claim 1 or 5, characterized in that, The volume resistivity of the semiconductive inner sheath material is 10^3-10^5 Ω·cm.

7. The anti-interference flat pulse oximetry lead cable according to claim 1 or 5, characterized in that, The four signal core wires are attached in pairs; the two ground wires are symmetrically distributed on both sides of one of the attached signal core wires.

8. The anti-interference flat pulse oximetry lead cable according to claim 1, characterized in that, The outer surface of the outer sheath is provided with anti-slip texture, and its coefficient of friction is 0.3-0.

5.

9. The anti-interference flat pulse oximetry lead cable according to claim 1, characterized in that, A transition adhesive layer is provided between the semiconductive inner sheath and the outer sheath.

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