An optical fiber sub-assembly includes: a handle, a rear retainer, an optical cable, a field mountable connector (FMC) assembly, a spindle, and a protection hood fixedly connected to the spindle. An end of the optical cable is connected to the FMC assembly, the optical cable protrudes from a first end of the FMC assembly. The FMC assembly includes a ferrule provided at a second end of the FMC assembly. The spindle is sleeved outside the first end of the FMC assembly, and the protection hood is sleeved outside the second end of the FMC assembly. An end of the spindle that is away from the protection hood is connected to the rear retainer and is used to fasten the optical cable. The handle is sleeved outside the protection hood and the spindle.

The present invention discloses a fiber optic connector comprising a housing, a spring, a ferrule assembly and a crimping seat. Before being inserted into the housing, the ferrule assembly is pre-assembled into the crimping seat in a manner of being movable relative to the crimping seat. The spring is pre-assembled into the housing before the ferrule assembly is inserted into the housing. After the pre-assembled ferrule assembly and crimping seat are inserted into the housing, the crimping seat is snap-fitted in the housing, and the spring pushes the ferrule assembly, so that the ferrule assembly is capable of being moved against the spring relative to the crimping seat. Before inserted into a housing of the fiber optic connector, some components may be pre-assembled together to form an integral assembly having a size less than that of a housing of the fiber optic connector. Accordingly, the integral assembly may be smoothly pulled through a small long pipe. After pulled through the pipe, the integral assembly may be easily and quickly inserted into the housing as a whole at one time.

A fiber optic ferrule includes a body extending from a first end to a second opposite end, with the body including an axial passage extending between the first and the second ends. The axial passage includes a first diameter portion having a diameter of at least 125 microns, a second diameter portion having a diameter of at least 250 microns and less than a diameter of a buffer, and a smooth and continuous transition between the first and the second diameter portions. The second diameter portion is positioned between the first diameter portion and the second end. The axial passage further defines a tapered shape at the second end extending inward from the second end toward the second diameter portion. In certain embodiments, another smooth and continuous transition can be provided between the taper shape and the second diameter portion. In certain embodiments, the axial passage is smooth and continuous between the first and the second ends of the body. A hub holds the ferrule. A method of assembling a terminated fiber optic cable is also provided.

A fiber optical connector includes a connector housing and an optical-fiber component. The connector housing comprises a receiving space. One end of the connector housing forms a connector opening communicating with the receiving space. Two side walls of the connector housing comprise a plurality of buckling portions adjacent to the connector opening. The optical-fiber component is positioned in the receiving space. The optical-fiber component comprises a sleeve piece. The sleeve piece comprises a block member and a threaded portion. The block member is assembled in the connector opening and the block member fully received inside the receiving space. Two sides of the block member respectively form an engaging portion. Each of the engaging portions is engaged with the corresponding buckling portion, and the threaded portion is exposed on the peripheral surface of a tail portion of the sleeve piece and out of the connector opening.

A fiber optic ferrule sub-assembly for insertion into an outer housing of a fiber optic connector includes a ferrule assembly having a ferrule that forms an optical communication connection with another fiber optic device. A back housing includes a back post to be attached to a fiber optic cable. A spring is operatively disposed between the ferrule assembly and the back housing. A linkage connects the ferrule assembly to the back housing such that the spring is compressed and biases the ferrule away from the back housing prior to insertion of the fiber optic ferrule sub-assembly into the outer housing.

A waterproof optical fiber connector includes an SC-type connection member; a connection element including first external threads at a front end, rear second external threads, and a waterproof flange on an outer surface between the first external threads and the second external threads; an internally threaded waterproof inner shell put on the SC-type connection member and threadedly secured to the first external threads; a waterproof outer shell put on a portion of the waterproof inner shell and including external threads at a front end and threadedly secured to an internally threaded cap; and an internally threaded waterproof sleeve threadedly secured to the second external threads.

A multi-fiber fiber optic connector is provided having features that allow for changeability with respect to gender. A pin retention structure is configured to retain a pair of alignment pins and includes a pin-holder body with a pair of pin openings and a U-shaped spring clip. The spring clip including a base portion and two opposing legs, and is movable between a pin retaining position and a pin release position. When the spring clip is in the pin retaining position, the two opposing legs engage with outer sides of each of the alignment pins, and when the spring clip is in the pin release position, the base portion flexes inwardly and the two opposing legs disengage with the outer sides of each of the alignment pins.

A fiber optic connector terminates a drop cable. A connector housing can include a back post where the drop cable to enters the housing. A cable clamp insert is least partially received in the back post. The cable clamp insert defines a passage for receiving the drop cable. A crimp ring is crimped onto the back post to secure the cable clamp insert to the housing and clamp the cable clamp insert onto the drop cable. Fiber optic connectors can also have a cable clamp insert and a cable clamp retainer that couples to the rear end portion of the housing whereby the cable clamp retainer pushes the cable clamp insert forward in the housing and applies an increasing force to create a tight connection between the housing and the cable clamp insert.

The disclosure provides an optic fiber connector, including a ferrule, a holder, a connector body having a plurality of first locking slots, a spring sleeved onto the holder, and a retainer having a plurality of locking hooks. The ferrule is assembled to the holder. The spring, the holder, and the ferrule are received in a space formed between the retainer and the connector body by locking the locking hooks with the locking slots respectively, wherein the spring is compressed by locking such that the retainer, the holder, the spring, and the connector body are abutted with each other.

A crimping method includes covering an outer periphery of the back post is with reinforced fibers. The reinforced fibers are crimped to a front section of a back post. The reinforced fibers are twisted in a circumferential direction of the back post, such that the reinforced fibers extend on the outer periphery of the back post in a non-axial direction. The twisted reinforced fibers are crimped to a rear section of the back post. A crimping device includes a connector including a back post having at least one guiding rib with at least one notch. At least one crimp sleeve is used to crimp reinforced fibers of an optical fiber cable to the back post, and a portion of the reinforced fibers is gathered in the at least one notch.