Cable-end assembly and optical connector of air-blown multi-core optical cable

Abstract

The present invention relates to a cable-end assembly of an air-blown multi-core optical cable, wherein one or more ferrule housings are arranged in series, and the ferrule housings are configured to be bendable upwardly and downwardly by a predetermined angle, thereby guiding smooth entry into a micro-duct and enabling an air-blown installation operation to be performed quickly and easily. Long grooves are formed on the outer surfaces of the ferrule housings in the longitudinal direction to minimize friction with the micro-duct during air-blown installation and blowing operations, thereby facilitating the air-blown installation operation. Further, when inserting the cable-end assembly of the air-blown multi-core optical cable into the micro-duct during the air-blown installation and blowing operations, insertion resistance is reduced by a rounded portion formed on the front surface of a blowing head, so that insertion is facilitated and smooth passage through the micro-duct is achieved.

Description

Cluster assembly and optical connector of multi-core optical cable for pneumatic installation

[0001] The present invention relates to a multi-core optical cable for pneumatic installation and an optical connector for pneumatic installation into a micro duct during pneumatic installation of optical cables at a FTTH (fiber to the home) installation site, and more particularly, to a multi-core optical cable for pneumatic installation and an optical connector in which at least one ferrule housing is arranged in series and the ferrule housing is configured to be bent at a certain angle in the vertical direction, thereby inducing smooth entry into the micro duct and enabling pneumatic installation work to be performed quickly and easily.

[0002] In general, the IT industry is growing rapidly worldwide. Not only in Korea but also globally, fierce competition and efforts are underway among national and international industries to lead the information age. In particular, in Korea, the government is promoting the construction of ultra-high-speed communication networks, and the development and commercialization of core technologies related to these projects are occurring simultaneously.

[0003] Today, the ubiquitous multimedia era driven by the Internet and mobile devices requires explosive bandwidth for communication networks.

[0004] Today, ultra-high-speed, long-distance, mass data transmission is taken for granted. The demand for high-speed, high-quality Internet access has driven commercial interest and fueled the development of optical communications technology.

[0005] Traditionally, copper-based networks have been the basis of telecommunications, but these are inevitably being replaced by optical networks due to bandwidth limitations that affect the efficiency of large-capacity transmission.

[0006] The power of optical networks has dramatically increased data transmission rates compared to copper-based networks, enabling the transmission of diverse data types (video, audio, and photos) over distances exceeding thousands of kilometers. This dramatic increase in data transmission has spurred a boom in the communications market, leading to increased installation of fiber-optic cables in residential areas, known as fiber-to-the-home (FTTH) networks.

[0007] FTTH technology is a technology that allows the provision of various information, including broadcasting and communications, by connecting optical cables to homes, and is being installed in general homes and newly built apartments.

[0008] The optical fiber in an optical cable transmits optical signals, and unlike metal wires that transmit electrical signals, it can transmit large amounts of information at high speeds without loss.

[0009] There are two methods for assembling connectors on-site after installing optical cables in FTTH networks: mechanical connectors and fusion connectors. The mechanical connector method, also called field-assembled connector, has the disadvantage of a high installation failure rate due to high loss after assembly, while the fusion connector method has the advantage of low loss after assembly, but the disadvantage is that it requires expensive equipment such as a fusion splicer for installation.

[0010] Connector connection is made by pre-adhering the optical fiber to a precision-machined ferrule and then using an optical adapter to secure the facing ferrules tightly.

[0011] An optical connector for connector connection is an element that connects optical fibers to optical fibers in an optical path. It aligns the optical fibers in the central through-hole of a ferrule made of ceramic, etc., and fixes them with adhesive to physically contact the optical fibers at both ends.

[0012] The optical connector is structured to allow repeated attachment and detachment to be used for connecting optical fiber clusters and optical devices to optical fibers.

[0013] Optical connectors are basically connected so that the cores inside the optical fiber are aligned with each other, with the optical fiber inside as the axis.

[0014] Since the core wire of an optical fiber is made to have a small diameter of several to several tens of micrometers (㎛), the technology to precisely align the core wire in the connection structure of an optical connector and thereby increase the precision of optical transmission is very important.

[0015] Typically, optical connectors using a ferrule, which has a relatively simple structure and low connection loss, are widely used to align the core axis of an optical fiber.

[0016] The ferrule is used after the optical fiber is inserted in the axial direction and the end is polished together with the optical fiber, taking into account the connection loss and reflection loss of the optical connector.

[0017] The adoption of FTTH systems has become a global trend, and this FTTH service opens up a new world of possibilities for subscribers, broadening human knowledge, improving health and quality of life, making businesses more productive, and providing many other benefits, and this is just the beginning.

[0018] However, in the case of the in-house connector cluster, which is the most important and expensive part for the successful installation of FTTH, the selection of the right connector and technology is of the utmost importance.

[0019] Looking at the technological development process of optical connectors, reducing insertion loss was the most important issue in the early stages of optical connector development.

[0020] Accordingly, the optical connector of the mid-1970s had a connection loss of about 1.5 dB for graded-index multimode optical fibers using refractive index matching materials in the gap between the lateral offset of 25 ㎛ and the end face of the optical fiber, and later, in the 1980s, a multimode optical connector with an insertion loss of about 0.3 dB was implemented by reducing the gap and using a physical contact (PC) that did not use refractive index matching materials.

[0021] Afterwards, as the use of single-mode optical fiber expanded, technological development focused on reducing the lateral offset of optical connectors and reducing the gap at the end faces of optical fibers without using refractive index matching materials, which made it possible to achieve an average insertion loss of about 0.1 dB. In addition, improvement of reflection loss characteristics by physical contact (PC) and other means became more stringently required.

[0022] Since then, optical connector technology has been focused on the end face shape of optical fibers and ferrules, and from an industrial perspective, research on complete mechanical connectors and interconnection of optical connectors has become necessary.

[0023] Accordingly, in the production of optical connectors, epoxy-free connectors with superior assembly and bonding strength have become mainstream, rather than epoxy-type connectors with excellent compatibility between ST and SC connectors. In terms of structure, single-core optical connectors have reached a stabilization stage and are now being developed in the direction of minimizing reflection loss, while in the case of multi-core optical connectors, development is progressing in the direction of increasing mounting density.

[0024]

[0025] Figure 1 is a perspective view showing a type of general optical connector.

[0026] As shown in Figure 1, representative types of optical connectors currently in use include LC, SC, ST, FC, and MTRJ types depending on the shape of the connector, and in addition, various types of optical connectors are being used.

[0027]

[0028] Figure 2 is a perspective view illustrating air blown cable installation.

[0029] Referring to Fig. 2, pneumatic laying refers to a method of laying an optical cable (optical fiber bundle) into a micro duct (tube) using compressed rotating air generated from a compressor and pneumatic laying equipment.

[0030] Among pneumatically installed optical cables, outdoor cables are often exposed to the elements and subject to significant tensile stress, so they are constructed of durable and flexible materials. Among pneumatically installed optical cables, indoor cables are those distributed from optical distribution panels to optical communication systems or equipment, and those connected from subscriber terminal boxes to indoor terminals. These cables primarily utilize optical cord stranding.

[0031] Indoor or jumper optical cables often require very limited installation space, requiring special structural characteristics for ease of installation. Specifically, they require heat resistance and shock resistance. Indoor cables are introduced into each subscriber's building, where they are connected to an indoor terminal box via a plug or connector.

[0032] Therefore, in the case of optical cables that are introduced indoors, a method is typically used in which an optical connector is installed at the end of the optical cable for introduction into the optical subscriber building where the optical cable is distributed, and the optical fiber is installed so that the connector can be used to directly connect the optical fiber to each terminal box or system inside the building. The method is to pre-attach the connector to the end of the optical cable and then install it.

[0033] During pneumatic laying and blowing work, the fiber optic cable assembly is inserted while blowing air into the micro duct (tube). However, since the conventional fiber optic cable assembly can only be installed as a single core, there is a problem in that, in order to lay a multi-core fiber, only the fiber must be pneumatically laid into the micro duct and then the optical connector must be reassembled on site using mechanical splicing or fusion splicing.

[0034] The present invention was invented to improve the above-mentioned problems, and the first problem to be solved by the present invention is to provide a multi-core optical cable assembly and optical connector for pneumatic installation, which can perform pneumatic installation work quickly and easily by configuring the ferrule housing to be bent vertically at a certain angle so that at least one ferrule housing is arranged in series and the micro duct can be installed while minimizing friction in a section where the micro duct is bent within 180 degrees, thereby inducing smooth entry into the micro duct.

[0035]

[0036] The second problem to be solved by the present invention is to provide a multi-core optical cable assembly and optical connector for pneumatic laying, which can facilitate pneumatic laying work by minimizing friction with a micro duct during pneumatic laying and blowing work by forming a longitudinal groove on the outer surface of the ferrule housing.

[0037]

[0038] The third problem to be solved by the present invention is to provide a cluster assembly and optical connector of a multi-core optical cable for pneumatic installation, which, when inserting the cluster assembly of a multi-core optical cable for pneumatic installation into a micro duct during pneumatic installation and blowing work, facilitates insertion by reducing resistance due to the rounded portion on the front of the blowing head, and enables smooth passage within the micro duct.

[0039]

[0040] The technical problems of the present invention are not limited to those mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

[0041] In order to achieve the above object, the multi-core optical cable for pneumatic installation according to the present invention is a pneumatic installation and blowing operation, wherein the pneumatic installation and blowing work is performed on an optical fiber cable that is introduced into a micro duct, the pneumatic installation and blowing work comprising: a housing boot that wraps around the outer circumference of the optical cable bundle to support the optical cable bundle and protect the optical cable so that it can be bent without loss change, and has a male coupling portion formed at an end thereof and coupling protrusions formed on both left and right sides of the male coupling portion; an optical cable protection portion for protecting the optical cable, the ferrule housing having a female coupling portion formed at one end thereof and coupling holes formed at both left and right sides of the female coupling portion, and a male coupling portion formed at the other end thereof and coupling protrusions formed at both left and right sides of the male coupling portion; A ferrule assembly including a ferrule inserted into the ferrule housing and configured to receive the optical cable within the central portion to align the optical cable in the axial direction, a ferrule flange fixed to the outer periphery of the ferrule to fix the alignment position of the ferrule, and a spring installed within the ferrule housing to elastically support the ferrule; and a blowing head coupled to a male coupling portion of the ferrule housing to ensure smooth passage within a micro duct during pneumatic laying and blowing work; wherein the technical feature is that at least one ferrule housing is connected in series by a structure in which the male coupling portion is inserted and coupled within the female coupling portion to form a multi-core optical cable.

[0042]

[0043] In addition, the female coupling part has an insertion space part that is open at the top and bottom, and the male coupling part has an insertion protrusion, and is configured to insert the insertion protrusion into the insertion space part and then fasten the coupling protrusion into the coupling hole, and is configured to be able to bend the ferrule housing at a certain angle in the vertical direction with the coupling protrusion fastened into the coupling hole as the center.

[0044]

[0045] Additionally, the male and female coupling portions formed on both sides of the ferrule housing are formed alternately.

[0046]

[0047] Additionally, a longitudinal groove may be formed on the outer surface of the ferrule housing to reduce friction with the micro duct during pneumatic laying and blowing operations.

[0048]

[0049] In addition, the optical cable protection member may be formed in a “C” shape with an upper side open for inserting the optical cable and a left and right side closed for wrapping and supporting the optical cable.

[0050] As described above, the present invention has the following effects.

[0051] First, at least one ferrule housing is arranged in series and configured to be able to bend the ferrule housing at a certain angle in the vertical direction, thereby inducing smooth entry into the micro duct and enabling quick and easy pneumatic installation work.

[0052] Second, a longitudinal groove is formed on the outer surface of the ferrule housing to minimize friction with the micro duct during pneumatic laying and blowing operations, thereby facilitating pneumatic laying operations.

[0053] Third, when inserting a multi-core optical cable assembly for pneumatic installation into a micro duct during pneumatic installation and blowing work, the rounded portion on the front of the blowing head reduces resistance, making insertion easy and enabling smooth passage within the micro duct.

[0054] Fourth, it can secure the reliability of data transmission and reception by preventing the optical cable from being excessively bent or kinked, and the optical connector structure for fixing the multi-core optical cable inside the optical adapter of the optical distribution box is simple, so the work time can be drastically shortened.

[0055]

[0056] The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

[0057] Figure 1 is a perspective view showing the types of general optical connectors.

[0058] Figure 2 is a perspective view showing air blown cable installation.

[0059] Figure 3 is a perspective view showing a cluster assembly of a multi-core optical cable for pneumatic installation according to a preferred embodiment of the present invention.

[0060] Figure 4 is a perspective view of Figure 3

[0061] FIG. 5 is a perspective view showing a ferrule assembly in a cluster assembly of a multi-core optical cable for pneumatic installation according to a preferred embodiment of the present invention.

[0062] Figures 6 to 8 are enlarged views of the main part of Figure 4.

[0063] Figure 9 is an enlarged view of the main part of the ferrule housing in the assembly of a multi-core optical cable for pneumatic installation according to a preferred embodiment of the present invention.

[0064] Figure 10 is a perspective view showing a cluster assembly of a multi-core optical cable after pneumatic laying.

[0065] Figure 11 is a drawing showing a process of bending a multi-core optical cable assembly with one or more ferrule housings arranged in series at a certain angle within a micro duct during pneumatic laying.

[0066] Figure 12 is a drawing showing a multi-core optical fiber cable.

[0067] Figure 13 is a perspective view showing a ferrule assembly installed at the end of an optical cable.

[0068] Figures 14 and 15 are perspective views showing the connection between the ferrule assembly and the stop ring (stopper).

[0069] Figure 16 is a perspective view of an optical connector installed to connect an optical cable to an optical communication facility.

[0070] Hereinafter, with reference to the attached drawings, a detailed description will be given of a multi-core optical cable assembly and an optical connector for pneumatic installation according to a preferred embodiment of the present invention.

[0071] FIG. 3 is a perspective view showing a terminal assembly of a multi-core optical cable for pneumatic installation according to a preferred embodiment of the present invention, FIG. 4 is an exploded perspective view of FIG. 3, FIG. 5 is a perspective view showing a ferrule assembly in a terminal assembly of a multi-core optical cable for pneumatic installation according to a preferred embodiment of the present invention, and FIGS. 6 to 8 are enlarged views of main parts of FIG. 4.

[0072] FIG. 9 is an enlarged view of a main portion of a ferrule housing in a multi-core optical cable assembly for pneumatic installation according to a preferred embodiment of the present invention, and FIG. 10 is a perspective view showing a multi-core optical cable assembly after pneumatic installation is completed.

[0073] Fig. 11 is a drawing showing a process of bending a multi-core optical cable assembly with one or more ferrule housings arranged in series at a certain angle within a micro duct during pneumatic installation, and Fig. 12 is a drawing showing a multi-core optical fiber cable.

[0074] Referring to the above drawing, the cluster assembly (100) of a multi-core optical cable for pneumatic installation according to a preferred embodiment of the present invention is a cluster assembly of an optical fiber cable that is smoothly inserted into a micro duct (20) (shown in FIG. 10) during pneumatic installation and blowing work.

[0075] A multi-core optical cable bundle assembly (100) for pneumatic installation according to a preferred embodiment of the present invention comprises: a housing boot (110) for wrapping and protecting an optical cable bundle (11); a ferrule housing (120) coupled to the housing boot (110) and having at least one or more ferrule housings arranged in series; a ferrule assembly (130); and a blowing head (140) coupled to a male coupling portion (50) of the ferrule housing (120) for smooth passage within a micro duct (20) during pneumatic installation and blowing work; wherein the blowing head is configured to be bent at a predetermined angle, i.e., to be bent, by at least one or more ferrule housings (120) arranged in series.

[0076]

[0077] Hereinafter, a cluster assembly of a multi-core optical cable for pneumatic installation according to a preferred embodiment of the present invention will be examined in more detail.

[0078] The housing boot (110) of the present invention wraps around the outer circumference of an optical cable bundle (11) to support the optical cable bundle (11) and protect the optical cable (10) so that it can be bent without loss change, and a male coupling portion (50) is formed at the end thereof, and coupling protrusions (51) are formed on both the left and right sides of the male coupling portion (50). The optical cable bundle (11) refers to a bundle of optical cables (10).

[0079]

[0080] In addition, the ferrule housing (120) is provided with an optical cable protection part (125) for protecting the optical cable (10), and is configured such that a female coupling part (60) is formed on one end, coupling holes (61) are formed on both left and right sides of the female coupling part (60), a male coupling part (50) is formed on the other end, and coupling protrusions (51) are formed on both left and right sides of the male coupling part (50).

[0081] For connection between at least one ferrule housing (120), male coupling portions (50) and female coupling portions (60) are alternately formed on both sides of the ferrule housing (120).

[0082] As illustrated in Fig. 3, four ferrule housings (120) are arranged in series, and are configured to be able to rotate (bend) at a certain angle in the vertical direction, centered on a coupling projection (51) fastened in a coupling hole (61).

[0083] For example, if one ferrule housing (120) rotates at 15°, four ferrule housings (120) can rotate at most 60°, so that pneumatic laying work can be performed very easily and quickly while bending the ferrule housings (120).

[0084] That is, as illustrated in FIGS. 3 to 12, the female coupling part (60) has an insert space (S) (illustrated in FIG. 7) that is open at the top and bottom, and the male coupling part (50) has an insertion protrusion (50a), and is configured so that after inserting the insertion protrusion (50a) into the insertion space (S), a coupling protrusion (51) is fastened into a coupling hole (61), and the ferrule housing (120) is configured so that it can be bent (bent) at a certain angle in the vertical direction with the coupling protrusion (51) fastened into the coupling hole (61) as the center, thereby inducing smooth progress into the micro duct (20) during pneumatic installation work.

[0085] When performing pneumatic laying and blowing operations, a longitudinal groove (121) may be formed on the outer surface of the ferrule housing (120) to ensure smooth entry of the ferrule housing (120) and reduce friction with the micro duct (20). As air passes through the groove (121), friction between the ferrule housing (120) and the micro duct (20) is reduced, thereby improving the pneumatic laying workability and effectively preventing damage to the ferrule housing (120).

[0086]

[0087] The above optical cable protection member (125) has an upper side that is open for inserting an optical cable (10) and a left and right side that is closed for wrapping and supporting the optical cable (10), and can be roughly formed into a “C”-shaped structure (as shown in FIG. 9).

[0088]

[0089] Additionally, as illustrated in FIG. 5, the ferrule assembly (130) includes a ferrule (131), a ferrule flange (132), and a spring (134).

[0090] The above ferrule (131) is inserted into the ferrule housing (120) and accommodates the optical cable (10) into the central portion to align the optical cable (10) in the axial direction.

[0091] The above ferrule flange (132) is fixed to the outer circumference of the ferrule (131) to fix the alignment position of the ferrule (131).

[0092] The above spring (134) is installed inside the ferrule housing (120) to elastically support the ferrule (131).

[0093]

[0094] In addition, as shown in FIGS. 3 to 8, the blowing head (140) is fastened to the front end of the ferrule housing (120), i.e., the male coupling portion (50) of the ferrule housing (120), for smooth passage within the micro duct (20) during pneumatic laying and blowing operations. The male coupling portion (50) is fastened within the coupling groove (141) of the blowing head (140).

[0095]

[0096] As illustrated in FIGS. 3 to 8, a multi-core optical cable for pneumatic installation according to a preferred embodiment of the present invention, a multi-core optical cable assembly (100), has a structure in which a male coupling part (50) is inserted and coupled into a female coupling part (60), thereby connecting at least one ferrule housing (120) in series to form a multi-core optical cable (optical fiber bundle) (illustrated in FIG. 12).

[0097] And as shown in Fig. 11, during pneumatic installation, a multi-core optical cable cluster assembly (100) having one or more ferrule housings arranged in series can be bent at a certain angle within a micro duct (20) to enable quick and easy operation.

[0098]

[0099] The operational effects of the cluster assembly of the multi-core optical cable for pneumatic installation according to a preferred embodiment of the present invention configured as described above are as follows.

[0100] When performing pneumatic laying and blowing work, the multi-core optical cable assembly (100) for pneumatic laying is inserted into the micro duct (20). At this time, the rounded portion on the front of the blowing head (140) reduces resistance, making it easy to insert the multi-core optical cable assembly (100) and to allow smooth passage within the micro duct (20) (see FIGS. 3 and 11).

[0101] In a multi-core optical cable assembly (100) for pneumatic installation according to a preferred embodiment of the present invention, at least one ferrule housing (120) is arranged in series, and the ferrule housing (120) is configured to be bent at a certain angle in the vertical direction with the coupling protrusion (51) fastened in the coupling hole (61) as the center, thereby inducing smooth progress into the micro duct (20).

[0102] Furthermore, a longitudinal groove (121) is formed on the outer surface of the ferrule housing (120) to minimize friction with the micro duct (20) during pneumatic laying and blowing operations, thereby facilitating pneumatic laying operations (as shown in FIGS. 8 and 9).

[0103]

[0104] Also, Fig. 13 is a perspective view showing a ferrule assembly installed at the end of an optical cable.

[0105] Figures 14 and 15 are perspective views showing the combination of a ferrule assembly and a stop ring (stopper), and Figure 16 is a perspective view showing a connector installed so as to connect an optical cable to an optical communication facility.

[0106] Referring to the drawing above, in the present invention, a multi-core optical cable (10) can be configured and a ferrule assembly (130) can be configured for each optical cable (10).

[0107] An optical connector (200) according to a preferred embodiment of the present invention may be configured to include: an optical connector boot (210) that wraps around the outer circumference of an optical cable (10) to support the optical cable (10) and protects the optical cable (10) so that it can be bent without loss change; a ferrule assembly (130) having a ferrule (131), a ferrule flange (132), a ferrule protection cap (133) (shown in FIG. 16), and a spring (134); an optical connector plug (220) for coupling with an optical adapter (not shown); and a stop ring (stopper) (230) that wraps around the ferrule assembly (130) and connects the optical connector boot (210) and the optical connector plug (220).

[0108] The above ferrule protection cap (133) is attached to the front end of the ferrule (131) to protect the ferrule (131) from scratches or contaminants.

[0109] As described above, the ferrule assembly (130) is inserted into the ferrule housing (120) and includes a ferrule (131) that receives the optical cable (10) in the central portion to align the optical cable (10) in the axial direction; a ferrule flange (132) that is fixed to the outer periphery of the ferrule (131) to fix the alignment position of the ferrule (131); and a spring (134) that is installed in the ferrule housing (120) to elastically support the ferrule (131).

[0110] As shown in Fig. 15, the stop ring (stopper) (230) may be configured in a “C” type shape, and a stopper portion (231) may be formed in the middle and a close-fitting protrusion portion (232) may be formed at the end.

[0111]

[0112] The type of optical connector (200) according to a preferred embodiment of the present invention is not limited to SC, and can be equally applied to other types such as LC, SC, ST, FC, and MTRJ types.

[0113]

[0114] As described above, the present invention has the following effects.

[0115] First, at least one ferrule housing is arranged in series and configured to be able to bend the ferrule housing at a certain angle in the vertical direction, thereby inducing smooth entry into the micro duct and enabling quick and easy pneumatic installation work.

[0116] Second, a longitudinal groove is formed on the outer surface of the ferrule housing to minimize friction with the micro duct during pneumatic laying and blowing operations, thereby facilitating pneumatic laying operations.

[0117] Third, when inserting a multi-core optical cable assembly for pneumatic installation into a micro duct during pneumatic installation and blowing work, the rounded portion on the front of the blowing head reduces resistance, making insertion easy and enabling smooth passage within the micro duct.

[0118] Fourth, it can secure the reliability of data transmission and reception by preventing the optical cable from being excessively bent or kinked, and the optical connector structure for fixing the multi-core optical cable inside the optical distribution box is simple, so the work time can be drastically shortened.

[0119]

[0120] Meanwhile, the present specification and drawings disclose preferred embodiments of the present invention, and although specific terms are used, they are used only in a general sense to easily explain the technical contents of the present invention and to help understanding of the invention, and are not intended to limit the scope of the present invention.

[0121] It will be apparent to those skilled in the art that other modifications based on the technical idea of ​​the present invention are possible in addition to the embodiments disclosed herein.

Claims

1. In the case of a cluster assembly of optical fiber cables inserted into a micro duct (20) during pneumatic laying and blowing work, A housing boot (110) that wraps around the outer circumference of an optical cable bundle (11) to support the optical cable bundle (11) and protect the optical cable (10) so that it can be bent without loss change, and has a male coupling portion (50) formed at the end and coupling protrusions (51) formed on both left and right sides of the male coupling portion (50); At least one ferrule housing (120) having an optical cable protection member (125) for protecting the optical cable (10), a female coupling member (60) formed on one end, coupling holes (61) formed on both left and right sides of the female coupling member (60), a male coupling member (50) formed on the other end, and coupling protrusions (51) formed on both left and right sides of the male coupling member (50); A ferrule assembly (130) having a ferrule (131) inserted into the ferrule housing (120) and accommodating the optical cable (10) in the central portion to align the optical cable (10) in the axial direction, a ferrule flange (132) fixed to the outer periphery of the ferrule (131) to fix the alignment position of the ferrule (131), and a spring (134) installed in the ferrule housing (120) to elastically support the ferrule (131); and Including a blowing head (140) that is connected to the male joint (50) of the ferrule housing (120) for smooth passage within the micro duct (20) during pneumatic laying and blowing work; A multi-core optical cable assembly for pneumatic installation, which comprises a multi-core optical cable by connecting at least one ferrule housing (120) in series by a structure in which the male-type coupling part (50) is inserted and coupled into the female-type coupling part (60).

2. In paragraph 1, The female-shaped coupling part (60) has an insertion space (S) that is open at the top and bottom, and the male-shaped coupling part (50) has an insertion protrusion (50a), and is configured so that the insertion protrusion (50a) is inserted into the insertion space (S) and then the coupling protrusion (51) is fastened into the coupling hole (61). A multi-core optical cable assembly for pneumatic installation, characterized in that the ferrule housing (120) is configured to be bent at a certain angle in the vertical direction with the coupling projection (51) fastened in the coupling hole (61) as the center.

3. In paragraph 1, A multi-core optical cable assembly for pneumatic installation, characterized in that the male coupling portions (50) and female coupling portions (60) formed on both sides of the ferrule housing (120) are formed alternately.

4. In paragraph 1, A multi-core optical cable assembly for pneumatic laying, characterized in that a longitudinal groove (121) is formed on the outer surface of the ferrule housing (120) to reduce friction with the micro duct (20) during pneumatic laying and blowing operations.

5. In paragraph 1, A multi-core optical cable assembly for pneumatic installation, characterized in that the optical cable protection part (125) has a structure in which the upper side is open for inserting the optical cable (10) and the left and right sides are closed for wrapping and supporting the optical cable (10).

6. In paragraph 5, A cluster assembly of a multi-core optical cable for pneumatic installation, characterized in that the above optical cable protection member (125) has a “C”-shaped structure.

7. In the case of a cluster assembly of optical fiber cables inserted into a micro duct (20) during pneumatic laying and blowing work, A housing boot (110) that wraps and protects an optical cable bundle (11); a ferrule housing (120) that is connected to the housing boot (110) and is arranged in series with at least one ferrule housing; A ferrule assembly (130); and a blowing head (140) that is connected to the male joint (50) of the ferrule housing (120) for smooth passage within the micro duct (20) during pneumatic laying and blowing operations; including, A cluster assembly of a multi-core optical cable for pneumatic installation, characterized in that it is configured to be bent at a certain angle by at least one ferrule housing (120) arranged in series.

8. In paragraph 7, A multi-core optical cable assembly for pneumatic installation, characterized in that male coupling parts (50) and female coupling parts (60) are alternately formed on both sides of the ferrule housing (120) for connection between the ferrule housings (120).

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