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WO2014036780A1 - 一种改进型光纤接入插头 - Google Patents

一种改进型光纤接入插头 Download PDF

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Publication number
WO2014036780A1
WO2014036780A1 PCT/CN2012/083387 CN2012083387W WO2014036780A1 WO 2014036780 A1 WO2014036780 A1 WO 2014036780A1 CN 2012083387 W CN2012083387 W CN 2012083387W WO 2014036780 A1 WO2014036780 A1 WO 2014036780A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical fiber
tail
tail pipe
ceramic ferrule
access plug
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2012/083387
Other languages
English (en)
French (fr)
Inventor
杨国
陈林
王七月
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sunsea Telecommunications Co Ltd
Original Assignee
Sunsea Telecommunications Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sunsea Telecommunications Co Ltd filed Critical Sunsea Telecommunications Co Ltd
Publication of WO2014036780A1 publication Critical patent/WO2014036780A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3869—Mounting ferrules to connector body, i.e. plugs
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3887—Anchoring optical cables to connector housings, e.g. strain relief features
    • G02B6/38875—Protection from bending or twisting
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3887—Anchoring optical cables to connector housings, e.g. strain relief features
    • G02B6/3889—Anchoring optical cables to connector housings, e.g. strain relief features using encapsulation for protection, e.g. adhesive, molding or casting resin

Definitions

  • the utility model relates to an optical fiber connecting device, in particular to an improved optical fiber access plug.
  • Optical fiber communication has become one of the main pillars of modern communication, playing a pivotal role in modern telecommunication networks.
  • the development of network technology has made optical fiber widely used as a transmission medium for high-speed and broadband data communication.
  • a fiber optic connector is a detachable (active) connection between an optical fiber and an optical fiber that precisely interfaces the two end faces of the optical fiber such that the optical energy output from the transmitting optical fiber is maximally coupled to the receiving optical fiber. And minimize the impact on the system due to its involvement in the optical link.
  • the commonly used fiber optic connectors can be divided into various forms according to the structure of the connector: FC, SC, ST, LC, D4, DIN, MU, MT, and the like.
  • the FC type fiber optic connector was first developed by NTT Japan.
  • the external reinforcement method is a metal sleeve and the fastening method is a turnbuckle.
  • the SC type fiber optic connector has a rectangular outer casing, and the pin and the coupling sleeve are of the same structural size as the FC type, and the fastening method is a plug-and-pin type.
  • the difference between the ST connector and the SC type fiber connector is that the core of the ST connector is exposed, and the core of the SC connector is inside the connector.
  • the LC connector was developed by the famous Bell Institute and is made with a convenient modular jack (RJ) latching mechanism.
  • the size of the pins and sleeves used is half that of ordinary SC, FC, etc., which is 1.25 ⁇ , and the corresponding interface end face size is 4. 5 ⁇ X 4. 5 ⁇ , which can improve the fiber wiring.
  • the MU (Miniature Unit Coupling) connector is the world's smallest single-core fiber optic connector developed by NTT based on the most widely used SC-type connector. 5 ⁇ X 4. 4 ⁇
  • the optical fiber network is rapidly developing in the direction of larger bandwidth and larger capacity, and the number of optical fiber handovers in the optical access network is increasing.
  • the demand for the transfer capacity of the device is also increasing.
  • the installation density of the fiber connector is required to be higher and higher, and the corresponding volume is getting smaller and smaller.
  • the lateral dimension of the end face of the fiber connector interface is required to be as small as possible to achieve
  • the installation density of the optical fiber connector is increased, but the structure and assembly process of the above existing optical fiber connector are not suitable for such a demand.
  • the outer casing of the existing optical fiber connector is generally divided into two parts.
  • the SC is divided into inner and outer frame sleeves, and the LC is divided into front and rear casings.
  • the process of manufacturing the two-part structure is complicated, and the process required for installation is required. It is also complicated, and the two-part fiber optic connector housings are usually fixedly connected by snaps. Multiple plugging and unplugging may cause the connection strength to be lowered, which is a weak connection between the two, affecting the product. In normal use, only new products can be replaced, which increases waste of manufacturing and use costs.
  • the purpose of the utility model is to provide an improved optical fiber access plug, wherein the outer casing of the optical fiber access plug adopts an integral design, which is different from the existing optical fiber connector structure, and can be greatly reduced under the premise of satisfying the structural strength.
  • the lateral dimension of the end face of the fiber optic connector increases the mounting density of the fiber optic connector, and at the same time makes the structure of the fiber access plug more compact, quicker and more convenient to install and manufacture.
  • An improved fiber optic access plug comprising a housing, a ferrule assembly connected to the optical fiber, and a tail sheath
  • the ferrule assembly includes a ceramic ferrule and a ceramic ferrule tailstock fixed to the ceramic ferrule, wherein the housing is an integrated cavity structure, a front end of the housing is provided with a through hole, and a tail insertion tail
  • the ceramic ferrule passes through the through hole, the front portion of the tail pipe is connected to the inner wall of the casing through the anti-back barb on the outer wall thereof, and the rear portion of the tail pipe is connected with the tail sheath, the inner cavity of the tail pipe
  • the utility model is composed of two through holes, and a tapered hole having a guiding end transitions to a circular through hole at the rear end; a housing inner cavity between the ceramic ferrule tailstock and the tail pipe is provided with a spring to provide a fitting force when the plug is docked.
  • the housing is provided with a resilient cantilever for locking with the insertion portion, the fixed end of the elastic cantilever is facing the tail of the connector, and the free end is facing the insertion end and is provided with a retaining projection.
  • the inner wall of the through hole is provided with a plurality of symmetrically arranged positioning protrusions; the ceramic ferrule tailstock is provided with a positioning groove matched with the positioning protrusion.
  • the anti-back barbs on the tail pipe are arranged in an annular shape and are flattened on both sides.
  • the tail sheath is fixedly connected to the plug through a tail pipe
  • the tail sheath is an elastic rubber or plastic material
  • a fastening sleeve is sequentially arranged from the inside to the outside of the tail sheath and the tail pipe.
  • heat shrink tubing is used to fix the fiber to the tail pipe.
  • the lateral width of the housing is 2. 5 mm to 4. 5 mm.
  • the tail pipe is processed from copper or aluminum.
  • the utility model has the beneficial effects that the utility model provides an improved light access plug and an assembly method thereof, and the outer casing adopts an integrated cavity structure, which is integrally molded by a mold, which is generally composed of two parts.
  • the outer casing is simpler in structure, more convenient and quicker in the production and assembly process, and can avoid the decrease of the connection strength between the components caused by the two-part structure during the process of plugging and unplugging;
  • the new type of spring is disposed in the cavity of the outer casing, and the spring is guided by the cavity of the connector housing, and the two ends are respectively limited by the ceramic ferrule tailstock and the tail pipe, and no additional structure is required for fixing, and can be provided Sufficient fit; at the same time, the inner cavity of the tail pipe is made
  • the tapered hole with guiding function can play a guiding role when the optical fiber is inserted into the access plug, which can effectively prevent the optical fiber from being bent when the plug is inserted, thereby improving the installation efficiency of the optical fiber installation.
  • FIG. 1 is a schematic view showing an assembly structure of an optical fiber access plug provided by an embodiment
  • FIG. 2 is a schematic external structural view of an optical fiber access plug provided by an embodiment
  • Figure 3 is an exploded view of the Figure 2;
  • FIG. 4 is a schematic structural view of an optical fiber access plug housing according to an embodiment
  • Figure 5 is a schematic structural view of the ferrule assembly of the embodiment
  • Figure 6 is a schematic structural view of a tail pipe according to an embodiment
  • Figure 7 is a schematic view showing the internal structure of the tail pipe according to the embodiment.
  • 1 housing; 2: ferrule assembly; 3: tail sheath; 4: tail tube; 5: spring; 6: fastening sleeve; 7: heat shrink tube;
  • a specific embodiment of the improved light access plug of the present invention which comprises a housing 1, a ferrule assembly 2 connected to the optical fiber, and a tail sheath 3, wherein
  • the ferrule assembly 2 comprises a ceramic ferrule 21 and a ceramic ferrule tailstock 22 fixed to the ceramic ferrule;
  • the housing 1 is an integral cavity structure, the front end of the housing 1 is provided with a through hole 11, the tail is inserted into the tail pipe 4, ceramic Ferrule 21 from through hole 11
  • the front part of the tail pipe 4 is connected to the inner wall of the casing 1 through the anti-back barbs 41 on the outer wall thereof, the tail pipe 4 is connected to the tail casing 3 at the rear, and the inner cavity of the tail pipe 4 is a two-section through hole.
  • the inner cavity of the tail pipe 4 is transformed from the tapered hole 42 having a guiding end to the circular through hole 43 at the rear end, and the front end of the inner cavity of the tail pipe 4 is formed as a tapered hole 42 having a guiding action.
  • the optical fiber When the optical fiber is inserted into the access plug, it plays a guiding role, which can effectively prevent the optical fiber from being bent when the plug is inserted, thereby improving the installation efficiency of the optical fiber installation, and guiding the optical fiber during fiber de-fibering, thereby effectively preventing the fiber from being broken.
  • the housing cavity between the ceramic ferrule tailstock 22 and the tail pipe 4 is provided with a spring 5 to provide a fitting force when the plug is docked.
  • the housing 1 is provided with an elastic cantilever 12 for locking with the insertion portion.
  • the fixed end 121 of the elastic cantilever 12 faces the tail of the connector, and the free end 122 faces the insertion end and is provided with the retracting projection 1221;
  • the end of the elastic cantilever 12 has a beveled retracting projection 1221.
  • the anti-retracting projection 1221 can be inserted from the corresponding adapter under the elastic force of the elastic cantilever 12 when the optical fiber connector is inserted into a design position such as an adapter module.
  • the groove is ejected to form a lock; when exiting, the lower arm is pressed accordingly, and the retracting projection 1221 is withdrawn from the groove on the adapter, and the bevel structure is automatically driven from the adapter slot by the elastic force of the elastic cantilever 12 itself.
  • the fixed end 121 of the elastic cantilever 12 is located at the rear end of the connector housing 1 and has a free end 122 facing the connector insertion end. During the exit process, the pulling of the adjacent fiber is not formed, thereby effectively avoiding misoperation and adjacent fibers. At the same time, it can be easily inserted from the free end by means of a lasso and the like, thereby pulling out the connector and effectively solving the problem.
  • the disadvantages of high-density connectors are inconvenient to pull out.
  • the inner wall of the through hole 11 is provided with a plurality of symmetrically arranged positioning protrusions 111.
  • the ceramic ferrule tailstock 22 is provided with a positioning groove 221 which cooperates with the positioning protrusion, and the positioning protrusion 111 and the positioning groove 221 cooperate with each other. To limit the rotation of the ceramic ferrule assembly 2, and to guide the axial movement of the ceramic ferrule assembly 2.
  • the housing 1 of the light access plug adopts an integral cavity structure, and the outer casing 1 is integrally formed by a mold.
  • the structure is simple, and it is convenient and quick in the process of production and assembly, and the connection strength between the two parts can be avoided, and the connection strength between the components can be reduced. The resulting connector cannot be used.
  • the tail pipe 4 and the cavity of the casing 1 are straight through holes, on the one hand, as a fiber channel, and on the other hand, have a large inner diameter, which can serve as a curved accommodation space when the fiber is retracted when the plug is docked.
  • the tail pipe 4 is made of copper or aluminum.
  • the copper or aluminum material can increase the structural strength of the tail pipe 4, and at the same time facilitate the processing of the tail pipe;
  • the tail pipe 4 has a check barb 41, which is The unwinding hooks 41 are distributed in an annular shape and are flattened on both sides thereof.
  • the outer casing 1 is provided with an annular groove 13 which cooperates with the retaining barbs 41, and passes through the anti-back barbs 41 and the annular grooves.
  • the interference fit of 13 can make the tail pipe 4 and the outer casing 1 fixedly connected; the both sides of the anti-back barb 41 can be flattened, and the lateral width of the outer casing 1 can be further reduced while preventing the rotation of the tail pipe 4,
  • the lateral width of the outer casing 1 is 2. 5 mm to 4. 5 mm.
  • the access plug of the present invention has a smaller width, which can greatly improve the installation density of the optical fiber access plug.
  • the spring 5 disposed between the ceramic ferrule tailstock 22 and the tail pipe 4, the spring 5 being compressed between the ceramic ferrule tailstock 22 and the tail pipe 4, one end of which is sleeved on the ceramic ferrule 22, and the other end
  • the sleeve is connected to the tail pipe 4 and is compressed and fixed by the tail pipe 4.
  • the elastic butt joint can make the ceramic ferrule 21 and the adapter fit more closely; and the cavity of the outer casing 1 forms a circumferential constraint on the spring 5, and the ceramic ferrule tailstock 22 and the tail pipe 4 provide a limit, which does not need In addition, other structures are added to provide the limit and fixing of the spring 5.
  • the optical fiber access plug further has a tail sheath 3, and the tail sheath 3 is fixedly connected to the plug through the tail pipe 4, the tail sheath 3 is an elastic rubber or material material, and is a thick and thin cone a structure between the tail sheath 3 and the tail pipe 4, which is provided with a fastening sleeve 6 and a heat shrinkable tube 7 from the inside to the outside for the light to be used
  • the fiber is fixed in the tail pipe 4, wherein the heat shrinkable tube 7 is disposed in the tail sheath 3.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Coupling Of Light Guides (AREA)

Description

一种改进型光纤接入插头 技术领域
本实用新型涉及光纤连接装置， 尤其涉及一种改进型光纤接入插头。
背景技术
光纤通信已成为现代通信的主要支柱之一，在现代电信网中起着举足轻重的 作用， 网络科技的发展， 使光纤作为一种高速、 宽带数据通信的传输媒介得到 了日益广泛的使用。 光纤连接器是光纤与光纤之间进行可拆卸 （活动） 连接的 器件， 它把光纤的两个端面精密地对接起来， 以使发射光纤输出的光能量能最 大限度地耦合到接收光纤中去， 并使由于其介入光链路而对系统造成的影响减 到最小。 目前常用的光纤连接器按连接头结构形式可分为： FC、 SC、 ST、 LC、 D4、 DIN, MU、 MT等各种形式。
FC型光纤连接器最早是由日本 NTT研制， 其外部加强方式是采用金属套， 紧固方式为螺丝扣。
SC型光纤连接器其外壳呈矩形， 所采用的插针与耦合套筒的结构尺寸与 FC 型完全相同， 紧固方式是采用插拔销闩式。
ST连接器与 SC型光纤连接器的区别在于 ST连接器的芯外露， SC连接器的 芯在接头里面。
LC型连接器是著名 Bel l (贝尔） 研究所研究开发出来的， 采用操作方便的 模块化插孔 （RJ ) 闩锁机理制成。 其所采用的插针和套筒的尺寸是普通 SC、 FC 等所用尺寸的一半， 为 1. 25匪， 其相应的接口端面尺寸为 4. 5匪 X 4. 5匪， 可以 提高光纤配线架中光纤连接器的密度。 目前， 在单模 SFF方面， LC类型的连接 器实际已经占据了主导地位， 在多模方面的应用也增长迅速。 MU (Miniature Unit Coupling) 连接器是以目前使用最多的 SC型连接器为 基础， 由 NTT研制开发出来的目前世界上最小的单芯光纤连接器。 该连接器采 用 1. 25mm直径的铝管和自保持机构， 其优势在于能实现高密度安装， 但其接口 端面尺寸依然达到了 6. 5mm X 4. 4mm。
随着 FTTH (Fiber To The Home, 光纤到家） 的大规模推进， 光纤网络向更 大带宽、 更大容量的方向迅速发展， 光接入网中光纤交接的数量需求愈来愈多， 对相应硬件设备的交接容量需求也越来越大， 要求光纤连接器的安装密度越来 越高， 相应的体积越来越小， 尤其是要求光纤连接器接口端面的横向尺寸尽可 能地缩小， 以实现在现有设备物理容积不变的基础上， 提高光纤连接器的安装 密度， 但上述现有的光纤连接器的结构和装配工艺均无法胜任这种需求。
同时， 现有的光纤连接器的外部壳体一般分为两部分， 例如， SC分为内外 框套， LC分为前后壳， 两部分结构的外壳在制造的过程比较复杂， 安装时需要 的过程也比较繁杂， 且由两部分组成的光纤连接器外壳之间通常是通过卡扣来 固定连接的， 多次的插拔可能造成连接强度降低， 是两者之间的连接不牢固， 影响产品的正常使用， 只能更换新的产品， 在造成浪费的同时， 使制造和使用 成本提高。
实用新型内容
本实用新型的目的在于提出一种改进型光纤接入插头， 该光纤接入插头的 外壳采用整体式设计， 其不同于现有的光纤连接器结构， 在满足结构强度的前 提下， 可大幅缩小光纤连接器接口端面的横向尺寸， 提高光纤连接器的安装密 度， 同时使光纤接入插头的结构更紧凑、 安装和制造更加快捷、 方便。
为达此目的， 本实用新型采用以下技术方案：
一种改进型光纤接入插头， 包括壳体、 同光纤连接的插芯组件以及尾护套， 所述插芯组件包括陶瓷插芯以及与所述陶瓷插芯固定的陶瓷插芯尾座， 其中， 所述壳体为一体式空腔结构， 所述壳体前端设置有通孔， 尾部插入尾管， 所述 陶瓷插芯自通孔穿出， 所述尾管前部通过其外壁上的止退倒钩与壳体内壁过盈 连接， 尾管后部连接尾护套， 所述尾管内腔为两段通孔组成， 由前端具有导向 作用的圆锥孔过渡至后端的圆通孔； 在所述陶瓷插芯尾座和尾管之间的壳体内 腔设置有弹簧提供插头对接时的贴合力。
进一步， 所述壳体上设置有用于同插入处锁定的弹性悬臂， 所述弹性悬臂 的固定端朝向连接器的尾部， 自由端朝向插入端并设置有止退凸块。
进一步， 所述通孔内壁设置有若干条对称布置的定位凸起； 所述陶瓷插芯 尾座上设置有与所述定位凸起相配合的定位凹槽。
进一步， 所述尾管上的止退倒钩呈环状布置， 并在两侧作削平处理。
进一歩， 所述尾护套通过尾管与所述插头固定连接， 所述尾护套为弹性橡 胶或塑料材料， 所述尾护套与尾管之间由内到外依次设置有紧固套和热缩管用 于将光纤同尾管固定。
优选的， 所述壳体横向宽度为 2. 5mm至 4. 5mm。
优选的， 所述尾管采用铜材或铝材加工而成。
本实用新型的有益效果为： 本实用新型提供了一种改进型光线接入插头及 其装配方法， 其外壳通过采用一体式空腔结构， 其通过模具整体压缩成型， 其 相对于一般由两部分组成的外壳， 结构更加简单， 在生产和组装过程中更加方 便、 快捷， 可以避免由两部分组成的结构在相互插拔的过程中造成的部件之间 的连接强度的降低而不能使用； 本实用新型中的弹簧设置在外壳的空腔内， 弹 簧由连接器外壳的空腔提供导向， 其两端分别通过陶瓷插芯尾座和尾管限位， 无需另外增加其它结构来固定， 并能提供足够的贴合力； 同时将尾管内腔做成 具有导向作用的圆锥孔， 可以在光纤插入接入插头时起到导向的作用， 能够有 效的防止光纤在插入插头时发生弯曲， 进而可以提高光纤安装的安装效率。 附图说明
下面结合附图并通过具体实施方式来进一步说明本实用新型的技术方案。 图 1是实施例提供的光纤接入插头的装配结构示意图；
图 2是实施例提供的光纤接入插头的外部整体结构示意图；
图 3是所述图 2的分解图；
图 4是实施例所述光纤接入插头壳体的结构示意图；
图 5是实施例所述插芯组件的结构示意图；
图 6是实施例所述尾管的结构示意图；
图 7是实施例所述尾管的内部结构示意图；
其中：
1： 壳体； 2: 插芯组件； 3: 尾护套； 4: 尾管； 5 : 弹簧； 6: 紧固套； 7: 热缩管； 8: 光纤；
11： 通孔； 12 : 弹性悬臂； 13 : 环形沟槽； 21 : 陶瓷插芯； 22 : 陶瓷插芯 尾座； 41 : 止退倒钩； 42: 圆锥孔； 43 : 圆通孔；
111： 定位凸起； 121 : 固定端； 122: 自由端； 221 : 定位凹槽；
1221： 止退凸块；
具体实施方式
如图 1至 6所示， 给出了本实用新型所述改进型光线接入插头的一个具体 实施例， 其包括壳体 1、 同光纤连接的插芯组件 2以及尾护套 3， 其中， 插芯组 件 2包括陶瓷插芯 21以及与陶瓷插芯固定的陶瓷插芯尾座 22;壳体 1为一体式 空腔结构， 壳体 1前端设置有通孔 11， 尾部插入尾管 4， 陶瓷插芯 21 自通孔 11 穿出； 尾管 4前部通过其外壁上的止退倒钩 41与壳体 1内壁过盈连接， 尾管 4 后部连接尾护套 3， 并且尾管 4的内腔为两段通孔组成， 如图所示， 尾管 4的内 腔由前端具有导向作用的圆锥孔 42过渡至后端的圆通孔 43，将尾管 4的内腔前 端做成具有导向作用的圆锥孔 42，可以在光纤插入接入插头时起到导向的作用， 能够有效的防止光纤在插入插头时发生弯曲， 进而可以提高光纤安装的安装效 率， 在光纤退纤时可起到导向作用， 可有效避免光纤的断折； 陶瓷插芯尾座 22 和尾管 4之间的壳体内腔设置有弹簧 5提供插头对接时的贴合力。
壳体 1上设置有用于同插入处锁紧定的弹性悬臂 12，弹性悬臂 12的固定端 121朝向连接器的尾部， 自由端 122朝向插入端并设置有止退凸块 1221 ; 在此 实施方式中， 弹性悬臂 12的末端具有带斜面的止退凸块 1221， 止退凸块 1221 能够在光纤连接器插入到诸如适配器模块设计位置时， 在弹性悬臂 12 自身弹力 的作用下， 从对应适配器上的凹槽弹出， 形成锁定； 在退出时， 相应按压下弹 臂， 止退凸块 1221退出适配器上的凹槽， 借助斜面结构， 在弹性悬臂 12 自身 的弹力作用下， 自动从适配器插槽中退出； 弹性悬臂 12固定端 121位于连接器 壳体 1后端， 其自由端 122朝向连接器插入端， 在退出过程中不会形成对旁边 光纤的拉挂， 有效避免了误操作和对邻近光纤的破坏； 同时， 可以方便的借助 套索等工具从自由端套入， 从而将该连接器拔出， 有效地解决了高密度连接器 不方便拔出的弊病。
通孔 11内壁设置有若干条对称布置的定位凸起 111 ; 同时陶瓷插芯尾座 22 上设置有与定位凸起相配合的定位凹槽 221，定位凸起 111和定位凹槽 221相互 配合用来限制陶瓷插芯组件 2的转动， 并可以对陶瓷插芯组件 2的轴向运动起 到导向的作用。
光线接入插头的壳体 1采用一体式的空腔结构， 该外壳 1由模具整体成型， 相对于现有的一般由两部分组成的外壳， 其结构简单， 在生产和组装的过程中 比较方便、 快捷， 可以避免了两部分结构之间相互插拔造成部件之间的连接强 度的降低， 造成的连接器的不能使用。
尾管 4与所述壳体 1的空腔为直通的孔， 一方面作为光纤通道， 另一方面 其具有较大的内直径， 可作为插头对接时， 光纤后退时的弯曲容纳空间。尾管 4 采用铜材或铝材加工而成， 采用铜材或铝材可以增加尾管 4 的结构强度， 同时 可以方便尾管的加工；该尾管 4上具有止退倒钩 41，该止退倒钩 41呈环状分布， 并在其两侧做削平处理， 同时， 在外壳 1上设置有与止退倒钩 41相配合的环形 沟槽 13， 通过止退倒钩 41和环形沟槽 13的过盈配合， 能够使尾管 4和外壳 1 固定连接； 止退倒钩 41的两侧做削平处理， 在防止尾管 4转动的同时， 可以进 一步的减小外壳 1的横向宽度， 能够实现外壳 1的横向宽度为 2. 5mm至 4. 5mm, 相对于现有的连接器， 本实用新型的接入插头具有更小的宽度， 可极大的提高 光纤接入插头的安装密度。
设置在陶瓷插芯尾座 22和尾管 4之间的弹簧 5， 该弹簧 5被压缩在陶瓷插 芯尾座 22和尾管 4之间， 其一端套接于陶瓷插芯 22上， 另一端套接于尾管 4 上， 在尾管 4的作用下被压缩固定， 陶瓷插芯 21在与诸如适配器相互对接后， 弹簧 5为陶瓷插芯 21提供对接时的贴合力， 实现陶瓷插芯 21的弹性对接， 可 以使陶瓷插芯 21和适配器配合的更加紧密； 并且由外壳 1的空腔对弹簧 5形成 周向约束， 并由陶瓷插芯尾座 22和尾管 4提供限位， 不需要另外增加其它的结 构为弹簧 5提供限位和固定。
为了对光纤进行保护， 光纤接入插头还具有尾护套 3， 尾护套 3通过尾管 4 与插头固定连接， 该尾护套 3为弹性橡胶或料材料， 并且为头粗尾细的锥形结 构； 尾护套 3与尾管 4之间由内到外依次设置有紧固套 6和热缩管 7用于将光 纤固定在尾管 4内， 其中热缩管 7设置在尾护套 3内。
上述说明是针对本实用新型可行的实施例的具体说明， 而该实施例并非用 以限制本实用新型的专利范围， 凡未脱离本实用新型技术精神所做出的等效实 施或变更的方式均应包含于本申请所请求保护的专利范围中。

Claims

权 利 要 求 书
1、 一种改进型光纤接入插头， 包括壳体、 同光纤连接的插芯组件以及尾护 套， 所述插芯组件包括陶瓷插芯以及与所述陶瓷插芯固定的陶瓷插芯尾座， 其 特征在于， 所述壳体为一体式空腔结构， 所述壳体前端设置有通孔， 尾部插入 尾管， 所述陶瓷插芯自通孔穿出， 所述尾管前部通过其外壁上的止退倒钩与壳 体内壁过盈连接， 尾管后部连接尾护套， 所述尾管内腔为两段通孔组成， 由前 端具有导向作用的圆锥孔过渡至后端的圆通孔； 在所述陶瓷插芯尾座和尾管之 间的壳体内腔设置有弹簧提供插头对接时的贴合力。
2、 根据权利要求 1所述的光纤接入插头， 其特征在于， 所述壳体上设置有 用于同插入处锁定的弹性悬臂， 所述弹性悬臂的固定端朝向连接器的尾部， 自 由端朝向插入端并设置有止退凸块。
3、 根据权利要求 1所述的光纤接入插头， 其特征在于， 所述通孔内壁设置 有若干条对称布置的定位凸起； 所述陶瓷插芯尾座上设置有与所述定位凸起相 配合的定位凹槽。
4、 根据权利要求 1所述的光纤接入插头， 其特征在于， 所述尾管上的止退 倒钩呈环状布置， 并在两侧作削平处理。
5、 根据权利要求 1所述的光纤接入插头， 其特征在于， 所述尾护套通过尾 管与所述插头固定连接， 所述尾护套为弹性橡胶或塑料材料， 所述尾护套与尾 管之间由内到外依次设置有紧固套和热缩管用于将光纤同尾管固定。
6、 根据权利要求 1至 5所述的任一种光纤接入插头， 其特征在于， 所述壳 体横向宽度为 2. 5mm至 4. 5mm。
7、 根据权利要求 1至 5所述的任一种光纤接入插头， 其特征在于， 所述尾 管采用铜材或铝材加工而成。
PCT/CN2012/083387 2012-09-06 2012-10-23 一种改进型光纤接入插头 Ceased WO2014036780A1 (zh)

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