Figure 8 optical fiber composite cable

Abstract

The present application provides an 8-shaped optoelectronic composite cable, comprising an optical unit, an electrical unit, and an outer sheath, the outer sheath comprising a first sheath, a second sheath, and a connecting portion, wherein the first sheath and the second sheath are spaced apart along a first direction, the connecting portion is arranged between the first sheath and the second sheath and is respectively connected to the first sheath and the second sheath, the outer diameter of the first sheath is greater than the outer diameter of the second sheath; a first cavity is provided in the first sheath, and a second cavity is provided in the second sheath; the electrical unit is provided in the first cavity, the number of the electrical units is set to at least two, at least two of the electrical units are arranged in sequence along a second direction, the second direction is arranged perpendicular to the first direction, and along the second direction, the width of the first cavity in the first direction increases successively from its two ends to its middle position; the optical unit is provided in the second cavity.

Description

Technical Field

[0001] The present application relates to the field of optoelectronic composite cables, and in particular to an 8-shaped optoelectronic composite cable. Background Art

[0002] Figure-8 optoelectronic composite cables generally house the optical unit and the electrical unit in two separate sheaths, which are then connected. Frequent bending during use can cause cracking at the connection between the outer sheaths of the optical and electrical units. Furthermore, the optical unit is susceptible to breakage due to external forces, impacting the service life of the cable. Summary of the Invention

[0003] The present application provides an 8-shaped optoelectronic composite cable to solve the problem of low service life of the optoelectronic composite cable in the prior art.

[0004] The present application provides an 8-shaped optoelectronic composite cable, comprising an optical unit, an electrical unit, and an outer sheath, the outer sheath comprising a first sheath, a second sheath, and a connecting portion, wherein the first sheath and the second sheath are spaced apart along a first direction, the connecting portion is arranged between the first sheath and the second sheath and is respectively connected to the first sheath and the second sheath, the outer diameter of the first sheath is greater than the outer diameter of the second sheath; a first cavity is provided in the first sheath, and a second cavity is provided in the second sheath; the electrical unit is provided in the first cavity, the number of the electrical units is set to at least two, at least two of the electrical units are arranged in sequence along a second direction, the second direction is arranged perpendicular to the first direction, and along the second direction, the width of the first cavity in the first direction increases successively from its two ends to its middle position; the optical unit is provided in the second cavity.

[0005] In a possible implementation manner, the shape of the first cavity is set to be elliptical.

[0006] In a possible implementation, the first cavity includes a first section and a second section, and along the second direction, the second section is connected to one end of the first section;

[0007] Among them, along the second direction, the width of the first segment in the first direction increases gradually from the end away from the second segment to the end close to the second segment; along the second direction, the width of the second segment in the first direction increases gradually from the end away from the first segment to the end close to the first segment.

[0008] In a possible implementation manner, the number of the electric units is set to two, the two electric units are respectively arranged in the first section and the second section, and the two electric units abut against each other.

[0009] In a possible embodiment, the 8-shaped optoelectronic composite cable also includes a first support member, which is arranged in the first cavity. Along the second direction, the first support member includes a first section and a second section connected in sequence, and the end of the first section away from the second section abuts against the inner wall of the first section, and the end of the second section away from the first section abuts against the inner wall of the second section.

[0010] In a possible embodiment, a first receiving groove is formed at one end of the first section away from the second section, and one of the electrical units is accommodated in the first receiving groove; a second receiving groove is formed at one end of the second section away from the first section, and one of the electrical units is accommodated in the second receiving groove.

[0011] In a possible implementation manner, the electrical unit includes a conductor and an insulating layer wrapped around an outer circumference of the conductor, and the first sheath is wrapped around an outer circumference of the insulating layer.

[0012] In a possible implementation, the light unit includes:

[0013] At least two optical fibers;

[0014] a reinforcement layer, disposed around the outer periphery of the at least two optical fibers;

[0015] The inner protective layer is wrapped around the outer peripheral surface of the reinforcement layer, and the second sheath is wrapped around the outer peripheral surface of the inner protective layer.

[0016] In one possible embodiment, the figure-8 optical fiber composite cable further includes a second support member, the second support member being disposed within the inner sheath, the second support member including a central portion and a plurality of extension portions, the plurality of extension portions being disposed around an outer circumference of the central portion, one end of the extension portion being connected to the central portion, and the other end thereof being against the inner sheath;

[0017] Wherein, any two adjacent extension parts are arranged at intervals, and a third receiving groove is formed between any two adjacent extension parts, and each of the third receiving grooves receives one of the optical units or the reinforcement member.

[0018] In a possible implementation, an end surface of the extension portion away from the central portion is a curved surface, and surfaces of adjacent sides of any two adjacent extension portions are also curved surfaces.

[0019] The figure-8-shaped optoelectronic composite cable of the present application is designed to have a first sheath containing an electrical unit with an outer diameter greater than a second sheath containing an optical unit. This allows the stress to be primarily concentrated on the first sheath where the electrical unit is located when the figure-8-shaped optoelectronic composite cable is subjected to external force, thereby reducing the stress on the optical unit and preventing breakage of the optical unit. Furthermore, the present application provides a special shape for the first cavity housing the electrical unit, such that the width of the first cavity in the first direction increases gradually from its ends to its center along the second direction. This prevents excessive stress from being transferred to the connecting portion, which could lead to breakage of the connecting portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of an 8-shaped optoelectronic composite cable according to an embodiment of the present application.

[0021] Figure 2 This is a schematic diagram of the internal structure of the first sheath of an embodiment of the figure-8 optical-electrical composite cable of the present application.

[0022] Figure 3 This is a structural schematic diagram of the second supporting member of an embodiment of the figure-8 optical-electrical composite cable of the present application.

[0023] Explanation of the main component symbols: 100, 8-shaped optoelectronic composite cable; X, first direction; Z, second direction; Y, third direction; 10, electrical unit; 11, conductor; 12, insulation layer; 20, optical unit; 21, optical fiber; 22, reinforcement layer; 23, inner sheath; 30, outer sheath; 31, first sheath; 310, first cavity; 3101, first section; 3102, second section; 32, second sheath; 320, second cavity; 33, connecting part; 40, first support member; 41, first section; 410, first receiving groove; 411, support arm; 4110, first extension portion; 4112, second extension portion; 42, second section; 420, second receiving groove; 50, second support member; 51, center portion; 510, limiting portion; 52, extension portion; 520, hook portion; 53, third receiving groove; 60, reinforcement member.

[0024] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0025] The following description will refer to the accompanying drawings to more fully describe the contents of this application. Illustrated in the accompanying drawings are exemplary embodiments of the present application. However, the present application can be implemented in many different forms and should not be construed as being limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make this application thorough and complete and to fully convey the scope of the present application to those skilled in the art. Similar reference numerals represent identical or similar components.

[0026] The terms used herein are for the purpose of describing specific exemplary embodiments only and are not intended to limit the present application. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms as well. In addition, when used herein, "includes" and / or "comprising" and / or "having" integers, steps, operations, components and / or components do not preclude the presence or addition of one or more other features, regions, integers, steps, operations, components and / or groups thereof.

[0027] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. In addition, unless explicitly defined herein, terms such as those defined in common dictionaries should be interpreted as having a meaning consistent with their meaning in the relevant art and the context of this application, and will not be interpreted as idealized or overly formal meanings.

[0028] The specific implementation methods of the present application will be described in further detail below with reference to the accompanying drawings.

[0029] like Figure 1 and Figure 2 As shown, this embodiment provides an 8-shaped optical-electrical composite cable 100, comprising an electrical unit 10, an optical unit 20, and an outer sheath 30. The optical unit 20 and the electrical unit 10 are both disposed in the outer sheath 30, which protects the optical unit 20 and the electrical unit 10.

[0030] For ease of subsequent reading, this application introduces a first direction X, a second direction Z, and a third direction Y to describe the embodiments of this application. The first direction X, the second direction Z, and the third direction Y can be three non-parallel linear directions in space; further, the first direction X, the second direction Z, and the third direction Y can be three mutually perpendicular directions in a three-dimensional coordinate system (a three-dimensional Cartesian coordinate system). In the subsequent embodiments, the first direction X is the X-axis direction of the coordinate axis of the three-dimensional coordinate system, the second direction Z is the Z-axis direction of the coordinate axis of the three-dimensional coordinate system, and the third direction Y is the Y-axis direction of the coordinate axis of the three-dimensional coordinate system. The axial extension direction of the figure-8 optical fiber composite cable 100 is parallel to the third direction Y.

[0031] The outer sheath 30 is made of polyvinyl chloride (PVC) or a low-smoke, halogen-free (LSZH) blend, which offers certain UV and rodent-resistant properties. The outer sheath 30 includes a first sheath 31, a second sheath 32, and a connecting portion 33. The first sheath 31 and the second sheath 32 are spaced apart along the first direction X. The connecting portion 33 is located between the first and second sheaths 31, 32, with its ends connected to the first and second sheaths 31, 32, respectively. The first, second, and connecting portions 33 are integrally molded, allowing the entire outer sheath 30 to be directly formed as a single unit onto the outer periphery of the optical unit 20 and the electrical unit 10. This not only reduces the manufacturing complexity of the outer sheath 30 but also minimizes the risk of breakage or damage due to bending during use. Furthermore, the connection between the connecting portion 33 and the first and second sheaths 31, 32 forms a smooth, curved transition to avoid stress concentration at the connection point.

[0032] Optionally, in the second direction Z, the first sheath 31 has a dimension D1, the connecting portion 33 has a dimension D3, and the second sheath 32 has a dimension D2. The ratio D1 / D3 is in the range of 4.5-6.4, and the ratio D2 / D3 is in the range of 3.9-5.3. If D3 is too small, the connecting portion 33 becomes thinner, which can affect mechanical properties, making it prone to tearing and significantly reducing its service life. If D3 is too large, it can affect aesthetics and increase production costs.

[0033] It will be appreciated that the range of D1 / D3 may be 4.5, 4.6, 4.7, 4.8, 4.9, 5.0, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.7, 5.8, 5.9, 6.0, 6.1, 6.2, 6.3, 6.4, and the like.

[0034] The range of D2 / D3 can be 3.9, 4.0, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, 5.0, 5.1, 5.2, 5.3, etc.

[0035] In another embodiment, in the first direction X, the dimension of the first sheath 31 is L1, the dimension of the connecting portion 33 is L3, and the dimension of the second sheath 32 is L2. The ratio of L1 / L3 ranges from 2.1 to 35.0, and the ratio of L2 / L3 ranges from 1.79 to 29.0. If L3 is too large, the outer diameter of the optical-electrical hybrid cable will be too long and unsuitable for the intended use. If L3 is too small, the optical unit 20 and the electrical unit 10 will be close to each other or even almost connected, failing to provide load-bearing performance. Therefore, the dimensions of the connecting portion 33 must meet the aforementioned ratio requirements.

[0036] It is understandable that the range of L1 / L3 can be 2.1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, etc.

[0037] The range of L2 / L3 can be 1.79, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, etc.

[0038] The outer contours of the first and second sheaths 31, 32 are both circular, with the outer diameter of the first sheath 31 being larger than that of the second sheath 32. A first cavity 310 is defined within the first sheath 31, and a second cavity 320 is defined within the second sheath 32. The electrical unit 10 is disposed within the first cavity 310. There are at least two electrical units 10, arranged sequentially along the second direction Z. Along the second direction Z, the width of the first cavity 310 increases from its ends to its center. The optical unit 20 is disposed within the second cavity 320.

[0039] Thus, the figure-eight optical composite cable 100 of the present application sets the outer diameter of the first sheath 31 containing the electrical unit 10 to be larger than the second sheath 32 containing the optical unit 20. This allows the figure-eight optical composite cable 100 to be subjected to external forces, with stress primarily concentrated on the first sheath 31 where the electrical unit 10 is located. This reduces the stress on the optical unit 20 and prevents breakage of the optical unit 20. Furthermore, the present application sets the first cavity 310 containing the electrical unit 10 into a special shape, such that along the second direction Z, the width of the first cavity 310 in the first direction X increases gradually from its two ends to its middle position. This prevents excessive stress from being transferred to the connection portion 33, which could cause the connection portion 33 to break.

[0040] Please combine again Figure 1 and Figure 2 In one embodiment, the shape of the first cavity 310 is set to be elliptical. Along the second direction Z, the dimensions of the two ends of the first cavity 310 are smaller than the dimension of the middle area thereof.

[0041] Specifically, along the second direction Z, the first cavity 310 includes a first section 3101 and a second section 3102 symmetrically arranged in sequence. Along the second direction Z, the second section 3102 is connected to one end of the first section 3101 .

[0042] Along the second direction Z, the width of the first section 3101 in the first direction X increases gradually from its end away from the second section 3102 to its end closer to the second section 3102. Along the second direction Z, the width of the second section 3102 in the first direction X increases gradually from its end away from the first section 3101 to its end closer to the first section 3101.

[0043] As such, because the first sheath 31 is circular and the first cavity 310 is elliptical, the thickness of the first sheath 31 changes accordingly with the shape of the first cavity 310. When the first sheath 31 is subjected to an external force in the second direction Z, as stress is transferred from the thinner end regions of the first sheath 31 to the thicker middle regions, the stress release increases with increasing thickness. This can minimize the stress reaching the connecting portion 33, thereby reducing the stress reaching the optical unit 20 and preventing breakage of the connecting portion 33 or the optical unit 20.

[0044] In this embodiment, there are two electrical units 10, one located in the first section 3101 and the other in the second section 3102. Along the second direction Z, the adjacent sides of the two electrical units 10 abut against each other, while the opposite sides of the two electrical units 10 abut against the inner wall of the first section 3101 and the inner wall of the second section 3102, respectively, thereby firmly securing the two electrical units 10 within the first cavity 310.

[0045] Please combine again Figure 1 and Figure 2 In one embodiment, the figure-8 optical fiber composite cable 100 further includes a first support member 40 disposed within the first cavity 310. Along the second direction Z, the first support member 40 includes a first section 41 and a second section 42 connected in sequence. The end of the first section 41 facing away from the second section 42 abuts against the inner wall of the first section 3101, while the end of the second section 42 facing away from the first section 41 abuts against the inner wall of the second section 3102. This allows the first sheath 31 to be partially transferred to the first support member 40 through contact with the first sheath 31 when subjected to external force, preventing significant stress from being transferred to the connection portion 33 and the optical unit 20, thereby reducing the risk of breakage of the connection portion 33 and the optical unit 20.

[0046] Optionally, the first support member 40 may be made of a foam material with buffering properties, so that a portion of the stress can be buffered through the body of the first support member 40 .

[0047] In this embodiment, a first receiving groove 410 is defined at one end of the first portion 41, distal from the second portion 42. The first receiving groove 410 accommodates one electrical unit 10. A second receiving groove 420 is defined at one end of the second portion 42, distal from the first portion 41. The second receiving groove 420 accommodates one electrical unit 10. This ensures that the two electrical units 10 are securely positioned within the first receiving groove 410 and the second receiving groove 420, respectively, enhancing the secure installation of the two electrical units 10.

[0048] In particular, along the first direction X, two adjacent inner walls of the first receiving groove 410 are curved surfaces, so as to guide the electrical unit 10 to fall into the bottom wall of the first receiving groove 410 and abut against the inner wall of the first receiving groove 410, thereby ensuring the stability of the electrical unit 10. Accordingly, along the first direction X, two adjacent inner walls of the second receiving groove 420 are curved surfaces, so as to guide the electrical unit 10 to fall into the bottom wall of the second receiving groove 420 and abut against the inner wall of the second receiving groove 420, thereby ensuring the stability of the electrical unit 10.

[0049] It is worth noting that the shape of the first support member 40 can be selected according to actual design requirements. For example, a rectangular structure connecting the first section 41 and the second section 42 can be provided between the first section 41 and the second section 42.

[0050] Optionally, the surface of the portion where the first support member 40 abuts against the first sheath 31 is an arc-shaped surface, so as to reduce the probability of the first sheath 31 being damaged by the first support member 40 when subjected to external force.

[0051] Optionally, the first section 41 and the second section 42 have the same structure and possess a certain degree of elasticity. Taking the first section 41 as an example, along the first direction X, the first section 41 includes two opposing support arms 411, each of which includes a first extension 4110 and a second extension 4112 connected to each other. The first extension 4110 extends away from the second section 42, and the dimensions of the two opposing first extensions 4110 in the first direction X gradually decrease as they move away from the second section 42. The second extension 4112 extends from the first extension 4110 toward the second section 42, and the dimensions of the two opposing second extensions 4112 in the first direction X gradually decrease as they move closer to the second section 42, eventually decreasing to a size smaller than the outer diameter of the electrical unit 10. This structural design of the first section 41 effectively secures the electrical unit 10 in place, and the design of the second extension 4112 facilitates guiding the electrical unit 10 into the first section 41.

[0052] Please combine again Figure 1 and Figure 2In one embodiment, the electrical unit 10 includes a conductor 11 and an insulating layer 12 surrounding the outer periphery of the conductor 11. The conductor 11 is a metal conductive wire such as a copper wire or an aluminum wire. The first sheath 31 is surrounding the outer periphery of the insulating layer 12.

[0053] The insulating layer 12 is made of polyvinyl chloride or a low-smoke zero-halogen mixture, and the insulating layers 12 of the two electrical units 10 are respectively distinguished by red or blue, so as to facilitate identification of the two electrical units 10 .

[0054] Please combine again Figures 1 to 3 In one embodiment, the optical unit 20 includes at least two optical fibers 21, a reinforcement layer 22, and an inner sheath 23. The optical fibers 21 in the optical unit 20 may also be in the form of an optical fiber ribbon. The reinforcement layer 22 is disposed around the outer periphery of the at least two optical fibers 21. The inner sheath 23 is disposed around the outer periphery of the reinforcement layer 22, and the second jacket 32 ​​is disposed around the outer periphery of the inner sheath 23.

[0055] Furthermore, the figure-8 optical fiber composite cable 100 includes a second support member 50. The second support member 50 is disposed within the inner sheath 23. The second support member 50 includes a central portion 51 and a plurality of extensions 52. The extensions 52 are arranged around the outer circumference of the central portion 51 and are spaced apart in sequence. One end of the extension 52 is connected to the central portion 51, and the other end thereof abuts the inner sheath 23.

[0056] Any two adjacent extensions 52 are spaced apart, and a third receiving groove 53 is formed between any two adjacent extensions 52. Each third receiving groove 53 accommodates an optical fiber 21 or a reinforcement member 60. When the number of optical fibers 21 is less than the number of third receiving grooves 53, the third receiving grooves 53 not accommodating optical fibers 21 will accommodate reinforcement members 60 to enhance structural strength. Reinforcement members 60 are non-metallic reinforcement elements such as reinforcing ropes.

[0057] In one possible embodiment, the end surface of the extension 52 away from the central portion 51 is curved to better conform to the inner circumference of the inner protective layer 23 and reduce the possibility of shaking. In addition, the surface of the adjacent side of any two adjacent extensions 52 is also curved to facilitate the placement of the light guide unit 20 or the reinforcement member 60 within the third receiving groove 53.

[0058] Or, as Figure 3As shown, two adjacent second extensions 52 are further provided with stoppers 510 extending from the central portion 51. The stoppers 510 have a lower hardness than the extensions 52. The stoppers 510 may be formed of a foam material, and the side facing the light unit 20 is provided with an arc portion adapted to the shape of the light unit 20. The foam material structure of the stoppers 510 can also buffer some stress, thereby reducing the probability of damage to the light unit 20. Furthermore, the ends of the second extensions 52 away from the central portion 51 are further provided with elastic hooks 520. The hooks 520 at the ends of the two adjacent second extensions 52 are arranged opposite each other, and the distance between the two opposing hooks 520 is less than the outer diameter of the light unit 20, thereby better defining the position of the light unit 20.

[0059] In particular, the outer periphery of the second support member 50 is provided with a water-blocking tape layer, and the inner sheath 23 is wrapped around the outer periphery of the water-blocking tape layer to ensure the roundness of the cable. The water-blocking tape layer is wrapped longitudinally to reduce the difficulty of cable stripping.

[0060] The following is an illustration of the beneficial effects of this application using actual product tests:

[0061] Example 1: The figure-8-shaped optical-electrical composite cable 100 of this embodiment includes an electrical unit 10, an optical unit 20, and an outer sheath 30. The outer sheath 30 includes a first sheath 31, a second sheath 32, and a connecting portion 33. The outer diameter of the first sheath 31 is larger than that of the second sheath 32. The first cavity 310 of the first sheath 31 is elliptical. There are two electrical units 10, one of which is disposed within the first section 3101 and the second section 3102 of the first cavity 310, respectively. There is one optical unit 20, which is disposed within the second cavity 320 of the second sheath 32. The second cavity 320 is circular. In the second direction Z, the dimension D1 of the first sheath 31 is 9 mm, the dimension D3 of the connecting portion 33 is 1.5 mm, and the dimension D2 of the second sheath 32 is 6 mm. In the first direction X, the dimension L1 of the first sheath 31 is 9 mm, the dimension L3 of the connecting portion 33 is 2.4 mm, and the dimension L2 of the second sheath 32 is 6 mm.

[0062] According to the GB / T7424.21 test standard for optical fiber composite cables, the bending performance of the figure-8 shaped optical fiber composite cable 100 of Example 1 was tested using a repeated bending test. The figure-8 shaped optical fiber composite cable 100 was subjected to a 20N load at 23°C. The test core diameter was no greater than 10 times the minor axis length. The number of cycles was 25. The residual additional attenuation of the optical fiber 21 tested in the figure-8 shaped optical fiber composite cable 100 was ≤0.118dB at 1550nm. After repeated bending tests with a load of 250N, a core radius no greater than the dynamic bending radius of the figure-8 shaped optical fiber composite cable 100, and 30 cycles, the additional attenuation of the optical fiber 21 was no greater than 0.4dB at 1550nm. Visual inspection revealed no damage to the figure-8 shaped optical fiber composite cable 100. Under a load of 250N, the cable was twisted 90° for 10 cycles. After 10 cycles, the optical fiber 21 showed no significant additional attenuation, returned to its original position, and returned to its original position. The outer jacket 30 showed no cracking.

[0063] Embodiment 2: The figure-8 optical-electrical composite cable 100 of this embodiment is additionally provided with a first support member 40 on the basis of embodiment 1, and the two electrical units 10 are respectively disposed in the first receiving groove 410 and the second receiving groove 420 .

[0064] Testing conducted according to the test method and conditions of Example 1 revealed that the residual additional attenuation of the optical fiber 21 for the figure-8-shaped optical fiber composite cable 100 was 0.072dB at 1550nm. A repeated bending test with a core diameter of 50mm revealed a residual additional attenuation of 0.167dB at 1550nm for the optical fiber 21. The figure-8-shaped optical fiber composite cable 100 exhibited no cracking. Torsional testing of the figure-8-shaped optical fiber composite cable 100 revealed an additional attenuation of 0.032dB for the optical fiber 21 and a residual additional attenuation of 0.0067dB. The outer jacket 30 exhibited no cracking. The additional attenuation of the optical fiber 21 was ≤0.030dB, indicating uncertainty and indicating no significant additional attenuation.

[0065] Example 3: The 8-shaped optoelectronic composite cable 100 of this embodiment is additionally provided with a second support member 50 on the basis of Example 1. The second support member 50 is provided with four third receiving grooves 53, wherein two of the third receiving grooves 53 are respectively provided with an optical fiber 21, and the other two third receiving grooves 53 are respectively provided with a reinforcement member 60, which is a filling rope.

[0066] Testing conducted according to the test method and conditions of Example 1 revealed that the residual additional attenuation of the optical fiber 21 for the figure-8-shaped optical fiber composite cable 100 was 0.065dB at 1550nm. A repeated bending test with a core diameter of 50mm revealed a residual additional attenuation of 0.158dB at 1550nm for the optical fiber 21. The figure-8-shaped optical fiber composite cable 100 exhibited no cracking. Torsional testing of the figure-8-shaped optical fiber composite cable 100 revealed an additional attenuation of 0.029dB for the optical fiber 21 and a residual additional attenuation of 0.0059dB. The outer jacket 30 exhibited no cracking. The additional attenuation of the optical fiber 21 was ≤0.030dB, indicating uncertainty and indicating no significant additional attenuation.

[0067] Embodiment 4: The figure-8 optical fiber composite cable 100 of this embodiment is additionally provided with the first supporting member 40 in embodiment 2 and the second supporting member 50 in embodiment 3 on the basis of embodiment 1.

[0068] Testing conducted according to the test method and conditions of Example 1 revealed that the residual additional attenuation of the optical fiber 21 for the figure-8-shaped optical fiber composite cable 100 was 0.057dB at 1550nm. A repeated bending test with a core diameter of 50mm revealed a residual additional attenuation of 0.149dB at 1550nm for the optical fiber 21. The figure-8-shaped optical fiber composite cable 100 exhibited no cracking. Torsional testing of the figure-8-shaped optical fiber composite cable 100 revealed an additional attenuation of 0.026dB for the optical fiber 21 and a residual additional attenuation of 0.0051dB. The outer jacket 30 exhibited no cracking. The additional attenuation of the optical fiber 21 was ≤0.030dB, indicating uncertainty and indicating no significant additional attenuation.

[0069] Comparative Example 1: The figure-8-shaped optoelectronic composite cable 100 of this embodiment includes an electrical unit 10, an optical unit 20, and an outer sheath 30. The outer sheath 30 includes a first sheath 31, a second sheath 32, and a connecting portion 33. The outer diameter of the first sheath 31 is larger than the outer diameter of the second sheath 32. The first cavity 310 of the first sheath 31 is circular in shape. Two electrical units 10 are disposed within the first cavity 310. One optical unit 20 is disposed within the second cavity 320 of the second sheath 32. The second cavity 320 is circular in shape. In the second direction Z, the dimension D1 of the first sheath 31 is 9 mm, the dimension D3 of the connecting portion 33 is 1.1 mm, and the dimension D2 of the second sheath 32 is 6 mm.

[0070] According to the test method and test conditions of Example 1, the residual additional attenuation of the optical fiber 21 tested by the 8-shaped optical fiber composite cable 100 is ≤0.15dB@1550nm. After repeated bending tests with a load of 250N, a core shaft radius no greater than the dynamic bending radius of the 8-shaped optical fiber composite cable 100, and 30 cycles, at 1550nm, the additional attenuation of the optical fiber 21 is no greater than 0.4dB. A visual inspection of the 8-shaped optical fiber composite cable 100 shows no damage. Under a load of 250N, the optical fiber 21 is twisted 90° for 10 times with a length of 1m. After 10 times, the optical fiber 21 has obvious additional attenuation and returns to its original position with a certain amount of residual additional attenuation.

[0071] It should be noted that, in the above four embodiments and one comparative example, except for the structure described above, the other disclosed structures and dimensions are the same.

[0072] The specific embodiments of the present application have been described above with reference to the accompanying drawings. However, those skilled in the art will appreciate that various modifications and substitutions may be made to the specific embodiments of the present application without departing from the ratio ranges of the present application. These modifications and substitutions are all within the ratio ranges defined in the present application.

Claims

1. An 8-shaped optical-electric composite cable, characterized in that: include: The outer sheath comprises a first sheath, a second sheath, and a connecting portion, wherein the first sheath and the second sheath are both circular in shape, and the first sheath and the second sheath are spaced apart along a first direction, the connecting portion is arranged between the first sheath and the second sheath and is respectively connected to the first sheath and the second sheath, the outer diameter of the first sheath is larger than the outer diameter of the second sheath; a first cavity is provided in the first sheath, and the shape of the first cavity is elliptical, the first cavity comprises a first section and a second section, and along the second direction, the second section is connected to one end of the first section, and the second direction is perpendicular to the first direction; along the second direction, the width of the first section in the first direction increases gradually from the end thereof farthest from the second section to the end thereof close to the second section; along the second direction, the width of the second section in the first direction increases gradually from the end thereof farthest from the first section to the end thereof close to the first section; a second cavity is provided in the second sheath, and the shape of the second cavity is circular; An electrical unit is disposed in the first cavity. The number of the electrical units is set to two. The two electrical units are arranged sequentially along the second direction, and the two electrical units are respectively disposed in the first section and the second section, and the two electrical units abut against each other. Along the second direction, the width of the first cavity in the first direction increases sequentially from its two ends to its middle position. Along the first direction, the length of the first sheath is L1, the length of the connecting portion is L3, and the length of the second sheath is L2. The range of L1 / L3 is 2.1-35.0, and the range of L2 / L3 is 1.79-29.

0. Along the second direction, the size of the first sheath is D1, the size of the connecting portion is D3, and the size of the second sheath is D2. The range of D1 / D3 is 4.5-6.4, and the range of D2 / D3 is 3.9-5.

3. The light unit is disposed in the second cavity.

2. The figure-8 optical-electric composite cable according to claim 1, wherein: The 8-shaped optoelectronic composite cable also includes a first support member, which is arranged in the first cavity. Along the second direction, the first support member includes a first section and a second section connected in sequence. The end of the first section away from the second section abuts against the inner wall of the first section, and the end of the second section away from the first section abuts against the inner wall of the second section.

3. The figure-8 optical-electric composite cable according to claim 2, wherein: The first section has a first receiving groove at one end away from the second section, and the first receiving groove accommodates one of the electrical units. The second section has a second receiving groove at one end away from the first section, and the second receiving groove accommodates one of the electrical units.

4. The figure-8 optical-electric composite cable according to claim 1, wherein: The electrical unit includes a conductor and an insulating layer wrapped around an outer circumference of the conductor, and the first sheath is wrapped around an outer circumference of the insulating layer.

5. The figure-8 optical-electric composite cable according to claim 1, wherein: The light unit comprises: At least two optical fibers; a reinforcement layer, disposed around the outer periphery of the at least two optical fibers; The inner protective layer is wrapped around the outer peripheral surface of the reinforcement layer, and the second sheath is wrapped around the outer peripheral surface of the inner protective layer.

6. The figure-8 optical-electric composite cable according to claim 5, characterized in that: The 8-shaped optical-electric composite cable further includes a second support member, which is arranged in the inner sheath. The second support member includes a central portion and a plurality of extension portions, and the plurality of extension portions are arranged around the outer circumference of the central portion. One end of the extension portion is connected to the central portion, and the other end thereof abuts against the inner sheath. Wherein, any two adjacent extension parts are arranged at intervals, and a third receiving groove is formed between any two adjacent extension parts, and each of the third receiving grooves receives one optical fiber or reinforcement member.

7. The figure-8 optical-electrical composite cable according to claim 6, wherein: An end surface of the extension portion away from the central portion is a curved surface, and surfaces of adjacent sides of any two adjacent extension portions are also curved surfaces.

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