Linear extension part and optical fiber ribbon optical cable with same

Abstract

The invention belongs to the technical field of optical cables, and discloses a linear extension component which is composed of a first extension body, a second extension body, a connecting body, a first extension strip and a second extension strip. The first extension body is composed of a first left side wall, an upper side wall and a first right side wall which are connected in sequence; the second extension body is composed of a second left side wall, a lower side wall and a second right side wall which are connected in sequence; the connector is connected with the first right side wall and the second left side wall; one end of the first extension strip is connected with the lower end of the first left side wall, a first extension groove is formed between the first extension strip and the connecting body, and the first extension groove communicates with the first inner groove; one end of the second extension strip is connected with the upper end of the second right side wall, a second extension groove is formed between the second extension strip and the connecting body, and the second extension groove communicates with the second inner groove. The invention also discloses a fiber optic ribbon cable with a linear extension member. The invention has the main beneficial technical effects that the structure is simple, the assembly is convenient, the convenience of taking and placing the optical fiber ribbon is greatly improved, and the expansion is very convenient.

Description

Technical Field

[0001] The present invention belongs to the technical field of optical cables, and in particular relates to a linear extension component and an optical fiber ribbon cable having the linear extension component. Background Art

[0002] With the growth of bandwidth access demand, the demand for optical fiber ribbon cables is increasing. In the prior art, the commonly used standards for optical fiber ribbon cables are YD / T 981 and YD / T 979, which have three types: central bundle tube type, layer twisted type, and skeleton type. Both central bundle tube type and layer twisted type ribbon cables have loose tubes, and the optical fiber ribbon is placed in the internal space of the loose tube. However, in order to make the optical fiber ribbon not subject to or less subject to external stress during production and use, the inner diameter of the loose tube is usually larger than the length of the cross section of the optical fiber ribbon. When multiple optical fiber ribbons are stacked, the inner diameter of the loose tube is longer than the diagonal length of the stacked body of the optical fiber ribbon. However, with the intensification of competition, people hope that the size of the optical fiber ribbon is as small as possible, so as to meet the requirements of reducing the various auxiliary materials outside the optical fiber ribbon and lowering the cost of the optical cable. To this end, unremitting research has been carried out in the industry, and the main existing technologies are as follows.

[0003] CN118759659A discloses a flame-retardant optical fiber ribbon cable, which includes a loose tube. The loose tube is composed of a tube body and at least two optical fiber ribbons with different core numbers. The tube body is an integrated structure. The tube body is composed of an outer wall body and at least one inner wall body. The inner wall cross-section of the outer wall body is circular. The inner wall body divides the interior of the outer wall body into a plurality of non-communicating accommodating cavities, and at least one curved accommodating cavity is provided. The curved accommodating cavity is used to place an optical fiber ribbon with a large core number. The optical fiber ribbon with a large core number is distributed in a curved manner in the curved accommodating cavity.

[0004] CN118707675A discloses a nested optical fiber ribbon cable, which has a cable core and an outer sheath covering the cable core, wherein the cable core includes a reinforcement member, a first sleeve, a first optical fiber ribbon, a second sleeve, and a second optical fiber ribbon; the first sleeve is composed of a first sleeve wall body in the shape of a circular cylinder, the first sleeve wall body has a curved accommodating cavity, the first sleeve wall body has a retaining channel, and the accommodating cavity has a first optical fiber ribbon; the second sleeve is composed of a second sleeve wall body in the shape of a cylinder and an extension component connected to the second sleeve wall body as a whole, the first sleeve wall body has a curved accommodating cavity, the extension component has an extension cavity, the extension cavity is connected to the accommodating cavity, and the extension cavity and the accommodating cavity have a continuous second optical fiber ribbon; the extension component extends into the retaining channel.

[0005] CN116594130A discloses a ribbon optical cable with a bending component, which has an outer sheath, a cross bending component located inside the outer sheath, four identical second bending bodies, four identical third bending bodies, four identical filling components, four identical first optical fiber ribbons, and four identical second optical fiber ribbons.

[0006] However, the above-mentioned prior art still has the following defects: the structure is relatively complex, the assembly is inconvenient, the convenience of taking and placing the optical fiber ribbon needs to be further improved, and the expansion performance needs to be improved. Summary of the invention

[0007] In order to solve the above problems, the purpose of the present invention is to disclose a linear extension component and an optical fiber ribbon cable having the linear extension component, which are implemented by adopting the following technical solutions.

[0008] A linear extension component, characterized in that: the linear extension component is composed of a first extension body, a second extension body, a connector, a first extension strip, and a second extension strip; the first extension body is composed of a first left side wall, an upper side wall, and a first right side wall connected in sequence, the first left side wall is perpendicular to the upper side wall, the upper side wall is perpendicular to the first right side wall, the first left side wall and the first right side wall are both located below the upper side wall, and a first inner groove is formed between the first left side wall, the upper side wall, and the first right side wall; the second extension body is composed of a second left side wall, a lower side wall, and a second right side wall connected in sequence, the second left side wall is perpendicular to the lower side wall, the lower side wall is perpendicular to the second right side wall, the second left side wall and the second right side wall are both located above the lower side wall, and a second inner groove is formed between the second left side wall, the lower side wall, and the second right side wall; one end of the connector is connected to the lower end of the first right side wall, and the other end of the connector is connected to the upper end of the second left side wall; the left surface of the first left side wall and the left surface of the second left side wall are in a first plane, the right surface of the first right side wall and the right surface of the second right side wall are in a second plane, The first plane is parallel to the second plane; one end of the first extension strip is connected to the lower end of the first left side wall, the other end of the first extension strip extends outward and protrudes to the left side of the first plane, a first extension groove is formed between the first extension strip and the connector, and the first extension groove is connected to the first inner groove; one end of the second extension strip is connected to the upper end of the second right side wall, the other end of the second extension strip extends outward and protrudes to the right side of the second plane, a second extension groove is formed between the second extension strip and the connector, and the second extension groove is connected to the second inner groove.

[0009] The linear extension component described above is characterized in that: a first tearing groove is provided on the first extension strip; after the first extension strip is torn along the first tearing groove, the first extension strip no longer protrudes to the left side of the first plane; a second tearing groove is provided on the second extension strip; after the second extension strip is torn along the second tearing groove, the second extension strip no longer protrudes to the right side of the second plane.

[0010] The linear extension component described above is characterized in that the linear extension component is an integrated structure.

[0011] The linear extension component described above is characterized in that the material of the linear extension component is plastic or a metal-containing material. When it is plastic, it is formed by one-time extrusion through an extruder; when it is a metal-containing material, it is formed by continuous casting.

[0012] An optical fiber ribbon cable with a linear extension component comprises a main cable core and an outer sheath outside the main cable core, characterized in that: The main cable core is composed of at least one sub-cable core, and each sub-cable core has at least two identical linear extension components as described above; In each sub-cable core: all the linear extension components are arranged in a linear shape, and in adjacent linear extension components, the outer surface of the other end of the first extension strip of the rear linear extension component is tightly attached to and aligned with the outer surface of the other end of the second extension strip of the front linear extension component, and a first outer groove is formed between the first right side wall of the rear linear extension component and the first left side wall of the front linear extension component, and the first outer groove, the second extension groove of the rear linear extension component, and the second inner groove of the rear linear extension component are connected to form a first fiber-accommodating ribbon groove with two bends; a second outer groove is formed between the second right side wall of the rear linear extension component and the second left side wall of the front linear extension component, and the second outer groove, the first extension groove of the front linear extension component, and the first inner groove of the front linear extension component are connected to form a second fiber-accommodating ribbon groove with two bends; Each first fiber ribbon slot has an optical fiber ribbon in two bends, and each second fiber ribbon slot has an optical fiber ribbon in two bends; Alternatively, each first fiber ribbon groove has at least two optical fiber ribbons in two bent shapes, and all the optical fiber ribbons in the first fiber ribbon groove are distributed in parallel; each second fiber ribbon groove has at least two optical fiber ribbons in two bent shapes, and all the optical fiber ribbons in the second fiber ribbon groove are distributed in parallel; Alternatively, each first fiber ribbon slot has three optical fiber ribbons, which are respectively located in the first outer slot, the second extension slot, and the second inner slot that constitute the first fiber ribbon slot; each second fiber ribbon slot has three optical fiber ribbons, which are respectively located in the second outer slot, the first extension slot, and the first inner slot that constitute the second fiber ribbon slot; When there are multiple sub-cable cores, the multiple sub-cable cores are distributed in a stacked manner, and in the upper and lower adjacent linear extension components, the lower side wall of each upper layer of linear extension components is aligned and tightly attached to the upper side wall of the corresponding linear extension component in the lower layer.

[0013] An optical fiber ribbon cable with a linear extension component, comprising a cable core and an outer sheath covering the cable core; the characteristics are: the cable core is composed of two identical linear extension components and two optical fiber ribbons; the linear extension component is any one of the linear extension components described above; The two linear extension components are arranged in a linear shape, the outer surface of the other end of the first extension strip of the second linear extension component is closely attached to and aligned with the outer surface of the other end of the second extension strip of the first linear extension component, a first outer groove is formed between the first right side wall of the first linear extension component and the first left side wall of the second linear extension component, the first outer groove is connected to the second extension groove of the first linear extension component, a second outer groove is formed between the second right side wall of the first linear extension component and the second left side wall of the second linear extension component, the second outer groove is connected to the first extension groove of the second linear extension component, the first outer groove is parallel to the second inner groove, and the second outer groove is parallel to the first inner groove; The first optical fiber ribbon is distributed in the first outer groove, the second extension groove of the first linear extension member, and the second inner groove of the first linear extension member in a curved manner; The second optical fiber ribbon is distributed in the second outer groove, the first extension groove of the second linear extension member, and the first inner groove of the second linear extension member in a bent manner.

[0014] The present application has the following major beneficial technical effects: simple structure, convenient assembly, greatly improved convenience in taking and placing optical fiber ribbons, and extremely convenient for expansion. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the cross-sectional structure of the cable core of Example 1.

[0016] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure after removing the optical fiber ribbon.

[0017] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure of a linear extension component used in.

[0018] Figure 4 Schematic diagram of the cross-sectional structure of another linear extension component used in implementation example 1.

[0019] Figure 5 This is a schematic diagram of the cross-sectional structure of Example 2 after the optical fiber ribbon is removed.

[0020] Figure 6 This is a schematic diagram of the cross-sectional structure of the cable core after removing the optical fiber ribbon in Example 3.

[0021] Figure 7 This is a schematic diagram of the cross-sectional structure of the cable core after removing the optical fiber ribbon according to Example 4.

[0022] Figure 8 This is a schematic diagram of the cross-sectional structure of the cable core after the optical fiber ribbon is removed in Example 5. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand and implement this patent, the marks in the drawings are now described in detail in conjunction with the drawings in the specification.

[0024] In the figure: 1—linear extension component, 2—optical fiber ribbon, 3—outer sheath, 11—first extension body, 12—second extension body, 13—connecting body, 110—first inner groove, 111—first extension strip, 113—first extension groove, 120—second inner groove, 121—second extension strip, 123—second extension groove, 1100—first outer groove, 1200—second outer groove, 1110—first tear groove, 1210—second tear groove.

[0025] Implementation Example 1: Please see Figures 1 to 4 , an optical fiber ribbon cable with a linear extension component, comprising a cable core and an outer sheath covering the cable core; characterized in that: The cable core is composed of two identical linear extension components 1 and two optical fiber ribbons 2; The linear extension component 1 is composed of a first extension body 11, a second extension body 12, a connecting body 13, a first extension strip 111, and a second extension strip 121; The first extension body 11 is composed of a first left side wall, an upper side wall, and a first right side wall connected in sequence, the first left side wall is perpendicular to the upper side wall, the upper side wall is perpendicular to the first right side wall, the first left side wall and the first right side wall are both located below the upper side wall, and a first inner groove 110 is formed between the first left side wall, the upper side wall, and the first right side wall; The second extension body 12 is composed of a second left side wall, a lower side wall, and a second right side wall connected in sequence, the second left side wall is perpendicular to the lower side wall, the lower side wall is perpendicular to the second right side wall, the second left side wall and the second right side wall are both located above the lower side wall, and a second inner groove 120 is formed between the second left side wall, the lower side wall, and the second right side wall; One end of the connecting body 13 is connected to the lower end of the first right side wall, and the other end of the connecting body 13 is connected to the upper end of the second left side wall; The left surface of the first left side wall and the left surface of the second left side wall are in a first plane, the right surface of the first right side wall and the right surface of the second right side wall are in a second plane, and the first plane is parallel to the second plane; One end of the first extension strip 111 is connected to the lower end of the first left side wall, and the other end of the first extension strip 111 extends outward and protrudes to the left side of the first plane. A first extension groove 113 is formed between the first extension strip 111 and the connecting body 13, and the first extension groove 113 is connected to the first inner groove 110; One end of the second extension strip 121 is connected to the upper end of the second right side wall, and the other end of the second extension strip 121 extends outward and protrudes to the right side of the second plane. A second extension groove 123 is formed between the second extension strip 121 and the connecting body 13, and the second extension groove 123 is connected to the second inner groove 120; The two linear extension parts 1 are arranged in a linear shape, the outer surface of the other end of the first extension strip 111 of the second linear extension part 1 is closely attached to and aligned with the outer surface of the other end of the second extension strip 121 of the first linear extension part 1, a first outer groove 1100 is formed between the first right side wall of the first linear extension part 1 and the first left side wall of the second linear extension part 1, the first outer groove 1100 is connected to the second extension groove 123 of the first linear extension part 1, a second outer groove 1200 is formed between the second right side wall of the first linear extension part 1 and the second left side wall of the second linear extension part 1, the second outer groove 1200 is connected to the first extension groove 113 of the second linear extension part 1, the first outer groove 1100 is parallel to the second inner groove 120, and the second outer groove 1200 is parallel to the first inner groove 110; The first optical fiber ribbon is distributed in the first outer groove 1100, the second extension groove 123 of the first linear extension member 1, and the second inner groove 120 of the first linear extension member 1 in a curved manner; The second optical fiber ribbon is distributed in the second outer groove 1200 , the first extension groove 113 of the second linear extension member 1 , and the first inner groove 110 of the second linear extension member 1 in a bent manner.

[0026] The optical fiber ribbon cable with a linear extension component described above is characterized in that: a first tearing groove 1110 is provided on the first extension strip 111; after tearing the first extension strip 111 along the first tearing groove 1110, the first extension strip 111 no longer protrudes to the left side of the first plane, so that the left side of the cable core can be a plane, which is more conducive to the outer sheath covering and makes the structure more compact.

[0027] The optical fiber ribbon cable with a linear extension component described above is characterized in that: a second tear groove 1210 is provided on the second extension strip 121; after tearing the second extension strip 121 along the second tear groove 1210, the second extension strip 121 no longer protrudes to the right side of the second plane, so that the right side of the cable core can be a plane, which is more conducive to the outer sheath covering and makes the structure more compact.

[0028] The optical fiber ribbon cable with a linear extension component described above is characterized in that the optical fiber ribbon is composed of multiple optical fibers and an adhesive layer covering all the optical fibers, and the optical fiber ribbon is an optical fiber ribbon with a rectangular cross-section in the prior art; compared with the prior art, the present application uses spliced ​​and curved grooves to accommodate optical fiber ribbons with a large number of cores, which saves space and material consumption, making the cost lower.

[0029] The cable core in this embodiment is called a sub-cable core. Since there is only one cable core, it can also be called a total cable core.

[0030] Implementation Example 2: Please see Figure 5 , and refer to Figures 1 to 4 , an optical fiber ribbon cable with a linear extension component, which is basically the same as the embodiment 1, except that: it is composed of three identical linear extension components 1 and a plurality of optical fiber ribbons 2; the three identical linear extension components 1 are arranged linearly in sequence; the left side surface of the first extension strip 111 of the third linear extension component 1 is closely attached to and aligned with the right side surface of the second extension strip 121 of the second linear extension component 1; the first extension strip 111 of the first linear extension component has a first tearing groove 1110; after the first extension strip 111 is torn along the first tearing groove 1110, the first extension strip 111 no longer protrudes to the left side. A plane is formed on the left side of the cable core; a second tear groove 1210 is provided on the second extension strip 121 of the third linear extension component; after the second extension strip 121 is torn apart along the second tear groove 1210, the second extension strip 121 no longer protrudes to the right side of the second plane, so that the right side of the cable core is a plane; the outer sheath 3 covers the cable core; the outer edges of the cross sections of the cable core and the outer sheath 3 are both rectangular; another first tear groove 1110 and another second tear groove 1210 are formed between the third linear extension component and the second linear extension component, and referring to implementation example 1, more optical fiber ribbons can be placed in the added grooves.

[0031] Implementation Example 3: Please see Figure 6 , and refer to Figures 1 to 5 , an optical fiber ribbon cable with a linear extension component, which is basically the same as embodiment 1, except that two sub-cable cores of embodiment 1 are arranged linearly and the number of optical fiber ribbons is increased.

[0032] Implementation Example 4: Please see Figure 7 , and refer to Figures 1 to 6 , an optical fiber ribbon cable with a linear extension component, the total cable core adopts two sub-cable cores in embodiment 3, which are aligned up and down.

[0033] Implementation Example 5: Please see Figure 8 , and refer to Figures 1 to 7 , an optical fiber ribbon cable with a linear extension component, the total cable core adopts three sub-cable cores in embodiment 3, which are aligned in the upper, middle and lower parts.

[0034] Of course, the above are only typical implementation examples. Under the inspiration of the above, technical personnel in the relevant field can arrange more linear extension components in a linear shape; and even multiple layers of linear extension components, with at least two linear extension components in each layer; this can further expand the number of optical fiber ribbons to meet the requirements of actual use.

[0035] The optical fiber ribbon cable with a linear extension component in the present application comprises a main cable core and an outer sheath outside the main cable core, and is characterized in that: The main cable core is composed of at least one sub-cable core, and each sub-cable core has at least two identical linear extension components; In each sub-cable core: all the linear extension components are arranged in a linear shape, and in adjacent linear extension components, the outer surface of the other end of the first extension strip of the rear linear extension component is tightly attached to and aligned with the outer surface of the other end of the second extension strip of the front linear extension component, and a first outer groove is formed between the first right side wall of the rear linear extension component and the first left side wall of the front linear extension component, and the first outer groove, the second extension groove of the rear linear extension component, and the second inner groove of the rear linear extension component are connected to form a first fiber-accommodating ribbon groove with two bends; a second outer groove is formed between the second right side wall of the rear linear extension component and the second left side wall of the front linear extension component, and the second outer groove, the first extension groove of the front linear extension component, and the first inner groove of the front linear extension component are connected to form a second fiber-accommodating ribbon groove with two bends; Each first fiber ribbon slot has an optical fiber ribbon in two bends, and each second fiber ribbon slot has an optical fiber ribbon in two bends; Alternatively, each first fiber ribbon groove has at least two optical fiber ribbons in two bent shapes, and all the optical fiber ribbons in the first fiber ribbon groove are distributed in parallel; each second fiber ribbon groove has at least two optical fiber ribbons in two bent shapes, and all the optical fiber ribbons in the second fiber ribbon groove are distributed in parallel; Alternatively, each first fiber ribbon slot has three optical fiber ribbons, which are respectively located in the first outer slot, the second extension slot, and the second inner slot that constitute the first fiber ribbon slot; each second fiber ribbon slot has three optical fiber ribbons, which are respectively located in the second outer slot, the first extension slot, and the first inner slot that constitute the second fiber ribbon slot; When there are multiple sub-cable cores, the multiple sub-cable cores are distributed in a stacked manner, and in the upper and lower adjacent linear extension components, the lower side wall of each upper layer of linear extension components is aligned and tightly attached to the upper side wall of the corresponding linear extension component in the lower layer.

[0036] A linear extension component for an optical fiber ribbon cable, characterized in that: the linear extension component is composed of a first extension body, a second extension body, a connector, a first extension strip, and a second extension strip; the first extension body is composed of a first left side wall, an upper side wall, and a first right side wall connected in sequence, the first left side wall is perpendicular to the upper side wall, the upper side wall is perpendicular to the first right side wall, the first left side wall and the first right side wall are both located below the upper side wall, and a first inner groove is formed between the first left side wall, the upper side wall, and the first right side wall; the second extension body is composed of a second left side wall, a lower side wall, and a second right side wall connected in sequence, the second left side wall is perpendicular to the lower side wall, the lower side wall is perpendicular to the second right side wall, the second left side wall and the second right side wall are both located above the lower side wall, and a second inner groove is formed between the second left side wall, the lower side wall, and the second right side wall; one end of the connector is connected to the lower end of the first right side wall, and the other end of the connector is connected to the upper end of the second left side wall; the left surface of the first left side wall and the left surface of the second left side wall are in a first plane, the right surface of the first right side wall and the right surface of the second right side wall are in a second plane, The first plane is parallel to the second plane; one end of the first extension strip is connected to the lower end of the first left side wall, the other end of the first extension strip extends outward and protrudes to the left side of the first plane, a first extension groove is formed between the first extension strip and the connector, and the first extension groove is connected to the first inner groove; one end of the second extension strip is connected to the upper end of the second right side wall, the other end of the second extension strip extends outward and protrudes to the right side of the second plane, a second extension groove is formed between the second extension strip and the connector, and the second extension groove is connected to the second inner groove.

[0037] The linear extension component for optical fiber ribbon cable described above is characterized in that: a first tearing groove is provided on the first extension strip; after the first extension strip is torn along the first tearing groove, the first extension strip no longer protrudes to the left side of the first plane; a second tearing groove is provided on the second extension strip; after the second extension strip is torn along the second tearing groove, the second extension strip no longer protrudes to the right side of the second plane.

[0038] The linear extension component described in the present application is an integrated structure, and the preferred material is plastic, which is extruded in one step by an extruder, or it can be other materials, such as metal-containing materials or other composite materials, which are formed by continuous casting.

[0039] In the present application, the first optical fiber ribbon is composed of a plurality of optical fibers arranged in a line and not in contact with each other, and an adhesive layer covering all the optical fibers; the second optical fiber ribbon is composed of a plurality of optical fibers arranged in a line and not in contact with each other, and an adhesive layer covering all the optical fibers; the original state of the optical fiber ribbon is a rectangular cross-section.

[0040] An optical fiber ribbon cable with a linear extension component in the present application includes a main cable core and an outer sheath located outside the main cable core. At least one protective layer may be provided between the outer sheath and the main cable core. For example, when there is one protective layer, the protective layer is coated on the outside of the main cable core. The material of the protective layer is a water-blocking tape or water-blocking yarn or aramid yarn or polyester yarn or non-woven fabric or polyester tape or water-blocking yarn or glass fiber yarn or steel tape or aluminum tape or copper tape or glass fiber reinforced plastic tape. When the protective layer is a yarn material, it is coated on the outside of the main cable core by spiral coating; when the protective layer is a tape material, it is coated on the outside of the main cable core by spiral or longitudinal coating. When the tape protective layer is spirally or longitudinally coated, it has overlap, and the overlap width is not less than 2 mm, which makes the structure tighter; the outer sheath is coated on the outside of the protective layer. Of course, it can have multiple protective layers, so that the product has multiple protection functions.

[0041] Compared with the prior art, the present application creatively adopts a linear extension component and solves the problems existing in the prior art; the bent first fiber ribbon groove and the second fiber ribbon groove allow the optical fiber ribbon to be reasonably bent without generating excessive external stress on the optical fiber, and at the same time, allows a longer optical fiber ribbon to be used in a smaller space, thereby achieving the goal of simplifying the structure, facilitating assembly, greatly improving the convenience of taking and placing the optical fiber ribbon, and being extremely convenient for expansion, etc.

[0042] The present application has the following major beneficial technical effects: simple structure, convenient assembly, greatly improved convenience in taking and placing optical fiber ribbons, and extremely convenient for expansion.

[0043] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A linear extension component, characterized in that: The linear extension component is composed of a first extension body, a second extension body, a connector, a first extension strip, and a second extension strip; the first extension body is composed of a first left side wall, an upper side wall, and a first right side wall connected in sequence, the first left side wall is perpendicular to the upper side wall, the upper side wall is perpendicular to the first right side wall, the first left side wall and the first right side wall are both located below the upper side wall, and a first inner groove is formed between the first left side wall, the upper side wall, and the first right side wall; the second extension body is composed of a second left side wall, a lower side wall, and a second right side wall connected in sequence, the second left side wall is perpendicular to the lower side wall, the lower side wall is perpendicular to the second right side wall, the second left side wall and the second right side wall are both located above the lower side wall, and a second inner groove is formed between the second left side wall, the lower side wall, and the second right side wall; one end of the connector is connected to the lower end of the first right side wall, and the other end of the connector is connected to the upper end of the second left side wall; the left surface of the first left side wall and the left surface of the second left side wall are in a first plane, the right surface of the first right side wall and the right surface of the second right side wall are in a second plane, The first plane is parallel to the second plane; one end of the first extension strip is connected to the lower end of the first left side wall, the other end of the first extension strip extends outward and protrudes to the left side of the first plane, a first extension groove is formed between the first extension strip and the connector, and the first extension groove is connected to the first inner groove; one end of the second extension strip is connected to the upper end of the second right side wall, the other end of the second extension strip extends outward and protrudes to the right side of the second plane, a second extension groove is formed between the second extension strip and the connector, and the second extension groove is connected to the second inner groove.

2. A linear extension member according to claim 1, characterized in that: The first extension strip has a first tearing groove; after the first extension strip is torn along the first tearing groove, the first extension strip no longer protrudes to the left of the first plane; the second extension strip has a second tearing groove; After the second extension strip is torn along the second tear groove, the second extension strip no longer protrudes to the right side from the second plane.

3. A linear extension member according to claim 1 or claim 2, characterized in that: The linear extension member is a one-piece structure.

4. A linear extension member according to claim 1 or claim 2, characterized in that: The material of the linear extension component is plastic or a metal-containing material. When it is plastic, it is formed by one-time extrusion through an extruder; when it is a metal-containing material, it is formed by continuous casting.

5. An optical fiber ribbon cable having a linear extension member, comprising a main cable core and an outer sheath located outside the main cable core, characterized in that: The main cable core is composed of at least one sub-cable core, each sub-cable core has at least two linear extension components as described in claim 1 or claim 2, and the linear extension components are identical; In each sub-cable core: all the linear extension components are arranged in a linear shape, and in adjacent linear extension components, the outer surface of the other end of the first extension strip of the rear linear extension component is tightly attached to and aligned with the outer surface of the other end of the second extension strip of the front linear extension component, and a first outer groove is formed between the first right side wall of the rear linear extension component and the first left side wall of the front linear extension component, and the first outer groove, the second extension groove of the rear linear extension component, and the second inner groove of the rear linear extension component are connected to form a first fiber-accommodating ribbon groove with two bends; a second outer groove is formed between the second right side wall of the rear linear extension component and the second left side wall of the front linear extension component, and the second outer groove, the first extension groove of the front linear extension component, and the first inner groove of the front linear extension component are connected to form a second fiber-accommodating ribbon groove with two bends; Each first fiber ribbon slot has an optical fiber ribbon in two bends, and each second fiber ribbon slot has an optical fiber ribbon in two bends; Alternatively, each first fiber ribbon groove has at least two optical fiber ribbons in two bent shapes, and all the optical fiber ribbons in the first fiber ribbon groove are distributed in parallel; each second fiber ribbon groove has at least two optical fiber ribbons in two bent shapes, and all the optical fiber ribbons in the second fiber ribbon groove are distributed in parallel; Alternatively, each first fiber ribbon slot has three optical fiber ribbons, which are respectively located in the first outer slot, the second extension slot, and the second inner slot that constitute the first fiber ribbon slot; each second fiber ribbon slot has three optical fiber ribbons, which are respectively located in the second outer slot, the first extension slot, and the first inner slot that constitute the second fiber ribbon slot; When there are multiple sub-cable cores, the multiple sub-cable cores are distributed in a stacked manner, and in the upper and lower adjacent linear extension components, the lower side wall of each upper layer of linear extension components is aligned and tightly attached to the upper side wall of the corresponding linear extension component in the lower layer.

6. The optical fiber ribbon cable having a linear extension member according to claim 5, characterized in that: There is at least one protective layer between the outer sheath and the main cable core.

7. The optical fiber ribbon cable having a linear extension member according to claim 6, characterized in that: When there is a protective layer, the protective layer is coated on the outside of the total cable core, and the material of the protective layer is water-blocking tape or water-blocking yarn or aramid yarn or polyester yarn or non-woven fabric or polyester tape or water-blocking yarn or glass fiber yarn or steel tape or aluminum tape or copper tape or glass fiber reinforced plastic tape.

8. The optical fiber ribbon cable having a linear extension member according to claim 7, characterized in that: When the protective layer is a yarn material, it is wrapped around the main cable core by spiral wrapping; when the protective layer is a belt material, it is wrapped around the main cable core by spiral or longitudinal wrapping. When the belt-type protective layer is wrapped spirally or longitudinally, it has overlaps, and the overlap width is not less than 2mm; the outer sheath is wrapped around the protective layer.

9. An optical fiber ribbon cable with a linear extension member, comprising a cable core and an outer sheath covering the cable core; characterized in that: The cable core is composed of two linear extension components as described in claim 1 or claim 2 and two optical fiber ribbons; the linear extension components are identical; The two linear extension components are arranged in a linear shape, the outer surface of the other end of the first extension strip of the second linear extension component is closely attached to and aligned with the outer surface of the other end of the second extension strip of the first linear extension component, a first outer groove is formed between the first right side wall of the first linear extension component and the first left side wall of the second linear extension component, the first outer groove is connected to the second extension groove of the first linear extension component, a second outer groove is formed between the second right side wall of the first linear extension component and the second left side wall of the second linear extension component, the second outer groove is connected to the first extension groove of the second linear extension component, the first outer groove is parallel to the second inner groove, and the second outer groove is parallel to the first inner groove; The first optical fiber ribbon is distributed in the first outer groove, the second extension groove of the first linear extension member, and the second inner groove of the first linear extension member in a curved manner; The second optical fiber ribbon is distributed in the second outer groove, the first extension groove of the second linear extension member, and the first inner groove of the second linear extension member in a bent manner.

10. The optical fiber ribbon cable having a linear extension member according to claim 9, characterized in that: The first optical fiber ribbon is composed of a plurality of optical fibers arranged in a line and not in contact with each other, and a bonding layer covering all the optical fibers.

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