• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The connector (C) comprises: an anchoring element (30) encompassing a bolt (20); a semi-tubular jaw (40) having an anterior end portion (41) inserted into and retained in the anchoring element (30), and a posterior end portion (42) internally provided with internal teeth (43) between which an extension of the jacket (CC) of a single-optical fibre cable (1) is inserted and retained by interference; and a tubular casing (50) encompassing the anchoring element (30) and the jaw (40). The internal teeth (43) of the jaw (40) project radially inwards from the interior surface of the posterior end portion (42) of the jaw (40), each terminating in a cutting edge (43a) contained in a plane orthogonal to the geometric axis of the jaw (40) and anterior to the cross section of the respective internal tooth (43).
    公开号:ES2724900A2
    申请号:ES201990058
    申请日:2018-01-15
    公开日:2019-09-17
    发明作者:Carneiro Matheus Kulcheski
    申请人:Furukawa Ind S A Produtos Eletricos；
    IPC主号:
    专利说明:

    [0001] CONNECTOR FOR SINGLE OPTICAL FIBER CABLE AND BUSHING TO SPRAY A SINGLE OPTICAL FIBER CABLE
    [0002] Field of the Invention
    [0003] The present invention relates to a fiber optic cable connector that has a basic structure suitable for a single fiber optic cable, generally known as a low friction or "low friction" cable, sufficiently robust and sealed so that its application is easy and simple in different installation conditions, generally in the field, where the use of assembly tools is generally difficult and even impracticable. The invention relates to a bushing for crimping the single fiber optic cable, to promote the retention of said optical cable to a connector.
    [0004] State of the art
    [0005] It is well known in the art a type of connector used to connect a single fiber optic cable (optical cable), with a pin-plug fixed in a port of an external, multi-port terminal box, installed in an aerial or underground mode and in whose spikes-plugs the optical fibers of a network are connected to which different users access through said
    [0006] Optical fiber optic cables only.
    [0007] In the type of external application in question, the pin-sockets of the terminal box and the connectors of the individual cables must be constructed to withstand severe conditions of temperature, humidity, exposure to chemical agents and other adverse operating conditions, generally present in an external installation, exposed to the weather.
    [0008] Usually, the connectors are previously fixed to the end of a respective optical connection cable, in general using specific tools, to allow the optical fiber to be connected to one of the optical fibers of the network, by simply fitting the connector into a pin - plug of a terminal box.
    [0009] In patent application BR 1020140164804 of the same depositor, a type of known connector is described which is formed by: a tubular internal body, having a rear end, than an end of an optical cable, and a leading end to which it is coupled a connecting tube to a pin - plug of a terminal box; a tubular housing that includes and retains the internal body; an anchoring means defined by a bushing for crimping, to anchor the cover and the tensile elements of the optical cable to the internal body.
    [0010] In this type of connector, the bushing bushing includes an extension of the tensile elements arranged over a stretch of the internal body, to be crimped, in at least two regions axially spaced from each other and in conjunction with the facing portion of the elements of traction, towards the inside of an external circumferential recess of the internal body and to penetrate the outer cover of the optical cable, anchoring both the cover and the tensile elements to the internal body of the connector.
    [0011] The connector described above requires the provision of the bushing to be crimped and, consequently, of specific tools to perform said crimping operation, making it difficult and even impossible to mount that connector to the end of an optical field cable.
    [0012] In addition to the aforementioned limitation and regarding the requirement to have mounting tools installed in specific locations, the known connector also requires the provision of equipment to ensure the correct introduction of the bare fiber optic, which projects from the end of the tube cover into the inner tubular body, as well as the fitting and retention of the bare fiber optic inside the connector tube, avoiding possible transmission continuity solutions between the optical fiber and the tube and risks of damage in the operation of mounting the optical fiber in the connector.
    [0013] Another known structure and directed to a fiber optic cable connector is described in WO2013 / 129485. In this second structure, the connector also comprises an internal tubular body, which has an anterior end to which a connection tube is attached to a pin - plug of a terminal box and a rear end in which a crimping bushing fitted with internal teeth and configured to receive and lock the cover end of a single fiber optic cable, of the low type is fitted and fixed friction, which will adapt to the connector. Usually external termination and closure elements are provided around the internal body of the connector.
    [0014] In these field connectors, the internal body is provided with means to direct the bare fiber optic extension, which projects from the end of the cable cover, for later coupling and retention inside the connector tube, this being operation performed manually by the operator without the need for special tools. The internal body has an inspection window to allow the operator to accompany the guided displacement of the naked fiber optic through the interior of the internal body, towards the inside of the tube, for fitting and retention in the bushing to be set inside the rear end of the internal body.
    [0015] In that previous structure, a layer of fiber defined by the acrylate coating, protective coating of the individual optical fiber, is arranged along the inside of the internal body without being attached in relation to the latter, the only one being the one between the optical cable and the internal body, due to the blocking of the cable cover inside the bushing to be crimped and the latter blocking within the rear end of the internal body of the connector. In this structure, the set defined by the naked optical fiber and its fiber layer, acrylate coating, is only guided inside the internal body, even after the naked optical fiber has been embedded and locked inside the tube. It should be noted that, in the type of low friction cable, the pair of traction cables is sectioned at the end of the cable sheath, and said traction cables do not participate in the blocking of the optical cable to the connector.
    [0016] In this second connector of the prior art, no traction cable block is provided in relation to the internal body of the connector, it being evident that its project aims exclusively at the installation of "low friction" cables subjected to relatively tensile stresses. reduced, allowing the blocking of the optical cable connector to be guaranteed exclusively by the blocking of the cable coating on the internal teeth of the bushing, without any blockage of the traction cables to the connector body.
    [0017] Thus, in this known solution of connector for low friction optical cable, the blocking of the cable sheath, before the final sealing of the connector, depends exclusively on the effectiveness of the blockage made by the internal teeth of the bushing to be crimped on the cable cover. .
    [0018] Although the second structure described in WO2013 / 129485 allows the connector to be mounted at the end of a low-friction field optical cable, without the use of special tools, it has the disadvantage of having the internal teeth of the bushing for set provided exclusively on the sides internally of the same and presenting, each, an isosceles triangular cross-section, unable to increase its bite in the cable cover, when the optical cable is subjected to tensile stress in the direction of the connector separation. The degree of blockage obtained by these teeth reduces their efficiency in axial locking of the single fiber optic low-friction optical cable, limiting its use to installations in which the cable is subjected to relatively low tensile stresses.
    [0019] Summary
    [0020] Considering the deficiency of the prior art connectors, the invention has the generic objective of providing a single fiber optic cable connector, subject to different tensile conditions, to be mounted in the field, without the need for special tools to guarantee the effective cable lock to the connector and secure mounting of the bare fiber optic to the connector tube.
    [0021] More specifically, the invention provides a connector and a bushing to be crimped for use in compact, single-fiber, low-friction and generally rectangular rectangular cross-sectional optical cables, without requiring any constructive modification in the internal body, in the tube or in the tubular housing.
    [0022] These and other objectives of the present invention are achieved with a single fiber optic cable connector of the type comprising: a cable cover, a fiber layer and an optical fiber, the connector being of the type comprising: an anchoring element tubular, which has an anterior end, which fixes a tube and a posterior end; a semi-tubular crimping bushing, which has a front end portion, embedded and retained at the rear end of the anchoring element, and a rear end portion internally provided with internal teeth, between which it fits radially and an extension of the cable sheath is axially retained; a tubular housing that includes the anchoring element and the bushing to be crimped and which has a front end that houses the tube, and a rear end on which a lid is locked. In accordance with the invention, the internal teeth of the crimping bushing project radially inwardly, from the internal surface of the rear end portion of the crimping bushing, to each end in a cutting edge contained in a plane orthogonal to the geometric axis of the bushing for crimping and anterior to the cross section of the respective internal tooth.
    [0023] Brief description of the drawings
    [0024] The invention will now be described based on the accompanying drawings, presented by way of example of the possible embodiments of the invention, and
    [0025] where:
    [0026] Figure 1 represents an exploded perspective view of the optical connector in question, illustrating a possible structure of the bushing to be crimped, to be applied to a single fiber optic cable of the low friction type;
    [0027] Figure 2 represents an exploded perspective view of a terminal extension of the low friction type optical cable and a respective bushing bushing;
    [0028] Figure 2A represents a top view of the elements of Figure 2, with the terminal extension of the low friction type optical cable already fitted and retained in the bushing for crimping;
    [0029] Figure 3 represents a plan view of the optical connector in the condition mounted on the end of an optical cable of the low friction type and with a 90 ° rotation in relation to Figure 1; Y
    [0030] Figure 3A is a longitudinal sectional view of the connector of Figure 3, taken along line III-III.
    [0031] Description
    [0032] As shown in the accompanying drawings, the connector in question is constructed to receive and retain the terminal portion of a CO optical cable defined by a single fiber optic cable 1, of the low friction type with a DC cable sheath defined by a external coating 1a, in general of polymeric material, a pair of tensile elements ET, in the form of lateral and opposite CT tensile cables, and of metallic material, a layer of CF fiber, which defines a fitted cover 1b, in general of acrylate and which defines a coating that includes an optical fiber FO.
    [0033] The connector in question basically comprises a plug 10, tubular, in general of plastic material, which defines a terminal piece configured in accordance with the TIA-604-3-B standard, so that it fits into a pin (not shown), in general, mounted and retained through a wall of a terminal box, to receive and block, in a simple, safe and tight manner, the connector, according to the well-known arrangement of the art. Inside the plug 10 is axially mounted a tube 20 having an anterior end 20a projected slightly outward from the plug 10 and a rear end 20b seated by an elastic means 21, generally in the form of a helical spring, within a tubular anchoring element 30, which has an anterior end 31 that includes the tube 20, around which the plug 10 is fitted and locked by any known structure. The anchoring element 30 has a rear end 32 in which an anterior end portion 41 of a semi-tubular crimping bushing 40, having side walls 40a, a bottom wall 40b and an upper opening 40c, is axially engaged and retained axially. , which extend along said front end portion 41. The crimping bushing 40 has a rear end portion 42, internally provided with internal teeth 43 between which it engages. radially and axially retained, by interference, a DC cable sheath extension defined by the outer sheath 1 a of the low friction optical cable 1.
    [0034] The connector in question comprises a tubular housing 50, constructed of any suitable material, plastic or metallic, which includes the anchoring element 30 and the crimping bushing 40 and having an anterior end 50a including the tube 20 and a rear end 50b in which a lid 60 is locked.
    [0035] As best shown in Figure 3A, the front end 50a of the tubular housing 50 is configured to be mounted, indexed and axially locked, as is well known in the art, around part of the plug 10, inside the which tube 20 is housed, constructed in the known manner to receive and retain a fiber optic extension FO in a "bare" condition, which projects from the end of the CF fiber cover of the optical cable 1, which is to be mounted in the connector.
    [0036] The connector further comprises a tubular seal bushing 80, placed between the rear end portion 42 of the crimping bushing 40 and the cover 60, a coupling device 90 that takes the form of a glove 91, with part of its knurled or textured outer surface otherwise, to facilitate manual grip. The glove 91 is mounted, rotatably free, around the tubular housing 50, between the cover 60 of the threaded rear end 20b and an external circumferential rib 54 incorporated in the tubular housing 50. The glove 91 has an anterior portion 92, of reduced external contour and incorporating two opposite radial pins 93, which act as bayonet type coupling elements, for the coupling device 90.
    [0037] The seal bushing 80, in elastomer, guarantees the tightness in the rear region of the connector C, presenting an internal cross-sectional contour corresponding to the external cross-sectional contour of the optical cable 1. The seal bushing 80 incorporates a small outer peripheral flange 81, which is projected radially from the outer circular contour to settle axially and press against the rear end 50b of the tubular housing 50.
    [0038] In addition to ensuring optimum sealing of the rear region of the connector C, the mounting of the seal bushing 80, radially compressed by the cover 60, provides an additional anchoring point of the optical cable 1, in the tubular housing 50, depending on the friction generated by the pressure exerted between the elastomeric material of the seal bushing 80 and the outer cover 1a, of the optical cable 1 and against the inner surface of the cover 60 itself, avoiding the use of known sealing elements defined by a thermo tube retractable
    [0039] The tubular housing 50 incorporates at least one outer circumferential groove 55, into which an elastomer O-ring 56 was placed, to be pressed and elastically deformed against an opposite inner wall of an outlet of an end box (both not shown) .
    [0040] As can be seen in FIG. 3A, the tubular housing 50 incorporates, in the region of its rear end 50b, two external radial projections 57 that can be fitted in respective radial windows 67 of the cover 60, allowing the latter to be axially and rotationally locked. on the rear end 50b of the housing 50. This structure allows the cover 60, of elongated tubular format, when fitted on the rear end 50b of the tubular housing 50, includes the seal bushing 80, compressing it tightly, radially , against the outer cover 1a of the fiber optic cable1, mounted to the connector and, axially against the rear end 50b of the tubular housing 50.
    [0041] The connector can also be provided with a tubular protector 100, generally made of elastomer, coupled to a rear end 62 of the cover 60 and which extends axially, along a certain flexible extension, on a respective section of the optical cable CO, adjacent to the connector.
    [0042] In accordance with the invention, the internal teeth 43 of the crimping bushing 40 project radially inwardly, from the internal surface of the rear end portion 42 of the crimping bushing 40, to terminate, each, in a cutting edge 43a contained in a plane orthogonal to the geometric axis of the bushing for crimping 40 and anterior to the cross section of the respective internal tooth 43.
    [0043] Each inner tooth 43a of the crimping bushing 40 has a front face portion 43b, limiting the cutting edge 43a of each inner tooth 43 said front face portion 43b of the respective inner tooth 43.
    [0044] In the configuration illustrated, the crimping bushing 40 has a semi-tubular shape, its rear end portion 42 has an internal surface defined by two opposite lateral sections and by a lower section, each of said sections incorporating a respective internal tooth extension 43.
    [0045] In the exemplary configuration, each inner tooth 43 of the crimping bushing 40 continuously extends through said lateral and lower sections of the inner surface of said rear end portion 42, maintaining the cutting edge 43a of the respective inner tooth extensions 43 in the same plane orthogonal to the longitudinal axis of the bushing for crimping 40.
    [0046] The structure of the internal teeth 43 presented by the invention allows the cutting edges 43a to be induced to penetrate more intensely in the cable sheath CC, when the optical cable CO is subjected to tensile stress in the direction of separation of the connector C. That characteristic of the greater bite of the internal teeth 43 of the present invention is the result of its conformation in which the cutting edge 43a of each is located in a plane orthogonal to the axis of the bushing for crimping that does not section the cross section of the respective inner tooth 43, staying ahead or before said cross section, away or coinciding with an adjacent portion of the front face of said inner dent 43.
    [0047] Still in accordance with the invention, the crimping bushing 40 comprises, in a middle region 44, defined between the front and rear end portions 41, a pair of internal guides 45 sideways and facing each other, between which it is radially housed and guided , an extension of the fiber cover (CF).
    [0048] According to the application of the connector in question, the extension of the CF fiber housing housed and guided between the pair of internal guides 45 is defined by an adjusted cover extension 1b, which defines an acrylate fiber optic coating, of an optical cable 1 of the low friction type provided with a pair of tensile elements ET, the cover extension of the DC cable being embedded and retained in the internal teeth 43 of the crimping bushing 40, defined by an extension of the cover external 1a of said optical cable 1.
    [0049] The structure of the internal teeth 43 allows a more effective nailing of its cutting edges 43a in the cable sheath CC, guaranteeing an axial retention more resistant to greater tensile stresses, without risks of the cable being released or of stress being applied. excessive over fiber optics.
    [0050] Once the fixation of the optical cable 1 on the crimping bushing 40 is completed, the front end portion 41 of the latter can then be fitted and locked at the rear end 32 of the anchoring element 30, with the cover fitted 1b and with an axial fiber extension Naked FO optics projected from said fitted cover 1b, which is inserted inside the anchoring element 30, for its fitting and retention inside the tube 20.
    [0051] To facilitate the addressing of the adjusted cover 1b, the anchoring element 30 is provided, near its rear end 32, with an inspection window 35, to be aligned with the upper opening 40c of the crimping bushing 40, when the fitting and retention at the rear end 32 of the anchoring element 30, allowing the assembly operator to visualize the address of the adjusted cover 1b and the bare fiber optic FO within the anchoring element 30 until it engages, which can be provided with the use of disposable guides, not illustrated here, because they are not part of the invention.
    [0052] The anchoring element 30 is provided internally in a middle region, before the inspection window 35, of a steering cone, with the major base facing the inspection window 35 and with the minor base facing the tube 20 and having an inner diameter slightly larger than that of the fitted cover 1b and which is aligned with the geometric axis of the tube 20.
    [0053] The anchoring system proposed by the present invention allows the axial locking of the optical cable 1 of the low friction type to have a more intense bite of the inner teeth 43 of the bushing for crimping 40 in the outer cover 1a of the optical cable 1. This retention it prints a greater reliability to the fixation of the optical cable 1 to the connector, even considering that, in this case, the two traction cables CT do not participate in the axial retention.
    [0054] Although only one structure has been described for the connector and for the bushing to be crimped, it will be understood that changes in the form of the components involved can be made without departing from the concept of the invention defined in the context of the claims accompanying this report. .
    权利要求:
    Claims (15)
    [1]
    1. A single fiber optic cable connector of the type comprising a cable cover (CC) that includes tensile elements (ET), a fiber cover (CF) and an optical fiber (FO), the type connector being which includes:
    a tubular anchoring element (30), with a leading end (31), which includes a tube (20) and a trailing end (32);
    a semi-tubular crimping bushing (40), which has side walls (40a), a bottom wall (40b) and an upper opening (40c) extending through an anterior end portion (41) of the crimping bushing (40 ), fitted and retained at the rear end (32) of the anchoring element (30), and by a rear end part (42) of the crimping bushing (40) internally provided with internal teeth (43), among which an extension of the cable sheath (CC) fits radially and is axially retained, by interference;
    a tubular housing (50) that includes the anchoring element (30) and the crimping bushing (40) and that has an anterior end (50a) that includes the tube (20), and a rear end (50b) in which lock a lid (60); characterized in that the internal teeth (43) of the crimping bushing (40) project radially inwardly, from the internal surface of the rear end portion (42) of the crimping bushing (40), to each end in a sharp edge (43a) contained in a plane orthogonal to the geometric axis of the bushing to be crimped (40) and anterior to the cross section of the respective internal tooth (43).
    [2]
    2. The connector according to claim 1, characterized in that each internal tooth (43a) of the crimping bushing (40) has a front face portion (43b), where the cutting edge (43a) of each internal tooth (43 ) limits the front face portion (43b) of the respective inner tooth (43).
    [3]
    3. The connector according to any of claims 1 or 2, characterized in that the inner surface of the rear end portion (42) of the crimping bushing (40) is defined by two opposite side sections and by a lower section, incorporating each of said sections a respective extension of the inner tooth (43).
    [4]
    The connector according to claim 3, characterized in that each inner tooth (43) of the crimping bushing (40) extends, continuously, through said lateral and lower sections of the inner surface of the extreme rear portion ( 42) of the crimping bushing (40), keeping the cutting edge (43a) its internal tooth extensions (43) in the same plane orthogonal to the longitudinal axis of the crimping bushing (40).
    [5]
    5. The connector according to claim 4, characterized in that the bushing bushing (40) comprises, in a middle region (44), defined between the front (41) and rear (42) end portions, a pair of guides internal (45), lateral and mutually facing, between which an extension of the fiber cover (CF) is radially housed and guided.
    [6]
    The connector according to claim 5, characterized in that the fiber cover extension (CF) housed and guided between the pair of internal guides (45) is defined by an adjusted cover extension (1b) in the form of a Acrylic fiber optic coating of an optical cable (1) of the low friction type provided with a pair of tensile elements (ET), the cable cover extension (CC) being embedded and retained in the inner teeth (43) of the crimping bushing (40), and defined by an outer covering extension (1a) of said optical cable (1).
    [7]
    7. The connector according to any of claims 1 to 6, characterized in that the anchoring element (30) must be provided with a window of inspection (35) that will align with the upper opening (40c) of the crimping bushing (40), in the portion of the anterior end (41) of the latter, when fitting and retention is carried out at the rear end (32) of the anchoring element (30).
    [8]
    8. The connector according to any of claims 1 to 7, characterized in that the tubular and elongated cover (60) is fitted and locked on the rear end (50b) of the tubular housing (50), said cover (60 ) includes a seal bushing (80), and compresses it radially, tightly, against the outer sheath (1a) of the optical cable (1), and axially, against the rear end (50b) of the tubular housing (50) .
    [9]
    9. The connector according to claim 8, characterized in that the tubular housing (50) incorporates two external radial projections (57) while the cover (60) is provided with a pair of radial windows (67) in each of which is fitted and a respective external radial projection (57) of the tubular housing (50) is locked.
    [10]
    10. A bushing for crimping for the single fiber optic cable, for attaching an optical cable (1) to a connector provided with an anchoring element (30), where the optical cable has an optical cable (CC) cover that includes the tensile elements (ET), and a fiber cover (CF) that surrounds an optical fiber (FO), said mordant (40) being semi-tubular and having an anterior end portion (41) fitted and retained at a rear end (32) of the anchoring element (30) and a rear end portion (42) provided internally with facing internal teeth (43), between which the cable cover (CC) is fitted and retained by interference, characterized in that the internal teeth (43) of the crimping bushing (40) project radially inwardly, from the internal surface of the rear portion (42) of the crimping bushing (40), to terminate, each, in a cutting edge (43a ) contained in a plane orthogonal to the geometric axis of the bushing to be crimped (40) and anterior to the cross section of the respective internal tooth (43).
    [11]
    11. The crimping bushing according to claim 10, characterized in that each inner tooth (43a) of the crimping bushing (40) has a front face portion (43b), wherein the cutting edge (43a) of each inner tooth (43) limits the front face portion (43b) of the respective inner tooth (43).
    [12]
    12. The crimping bushing according to any of claims 10 and 11, characterized in that the rear end portion (42) of the crimping bushing (40) has its internal surface defined by two opposite side sections and by a lower section, where each of said sections incorporates a respective extension of the internal tooth (43).
    [13]
    13. The crimping bushing according to claim 12, characterized in that each inner tooth (43) of the crimping bushing (40) extends continuously through said lateral and lower sections of the inner surface of the rear end portion ( 42) of the crimping bushing (40), keeping the cutting edge (43a) of their respective internal tooth extensions (43) in the same plane orthogonal to the longitudinal axis of the crimping bushing (40).
    [14]
    14. The crimping bushing according to claim 13, characterized in that the crimping bushing (40) comprises, in a middle region (44) which is defined between the front (41) and rear (42) end portions, at minus a pair of internal guides (45), laterally and mutually facing each other, among which an extension of the fiber cover (CF) is radially housed and guided.
    [15]
    15. The crimping bushing according to any of claims 10 to 14, characterized in that the fiber cover extension (CF) housed and guided between the pair of internal guides (45) is defined by an adjusted cover extension ( 1b) in form of an acrylate fiber optic sheath, of a low friction type optical cable (1) provided with a pair of tensile elements (ET), where the extension of the cable sheath (CC), which is fitted and retained in the internal teeth (43) of the crimping bushing (40), is defined by an extension of the outer cover (1a) of said optical cable (1).
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    同族专利:
    公开号 | 公开日
    AR110885A1|2019-05-15|
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    CL2019001985A1|2019-12-20|
    MX2019008547A|2020-02-07|
    ES2724900R1|2020-02-03|
    ES2724900B2|2020-06-02|
    PE20191439A1|2019-10-15|
    US20180203192A1|2018-07-19|
    CO2019006439A2|2019-08-30|
    WO2018132885A1|2018-07-26|
    US10509179B2|2019-12-17|
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    优先权:
    申请号 | 申请日 | 专利标题
    BR102017000982-3A|BR102017000982A2|2017-01-17|2017-01-17|SINGLE OPTICAL FIBER CABLE CONNECTOR FOR SINGLE OPTICAL FIBER CABLE|
    PCT/BR2018/050007|WO2018132885A1|2017-01-17|2018-01-15|Connector for a single-optical fibre cable and jaw for a single-optical fibre cable|
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