CN102854575A - Optical fiber connector - Google Patents

Abstract

The present invention provides an optical fiber connector, comprising: an optical fiber connection unit; and an optical fiber fixing device connected to the optical fiber connection unit, wherein the optical fiber fixing device has: a groove body; and cover the groove body to form a space suitable for accommodating and fixing the optical cable.

Description

The optical fiber connector

technical field

The invention relates to an optical fiber connector, in particular to an optical fiber connector which can be assembled on site.

Background technique

Optical fiber connectors are essential components in optical fiber communication systems. Due to the gradual fiberization of local communication networks, especially in order to meet the needs of optical fiber access networks and fiber-to-the-home (FTTH), the demand for optical fiber connectors is also rising, and assembly and grinding production in factories alone can no longer meet the needs, and Its cost is also high, so the assembly of connectors is moving from the factory to the installation engineering site, and there is an increasing demand for fast and easy field-assembled fiber optic connectors.

Connectors suitable for field installation must save time, effort, and ease of operation, and require only a few minutes to assemble a reliable fiber optic connector. A connector installed on site generally includes an optical fiber connection unit for realizing optical fiber connection, and an optical fiber fixing device fixedly connected to the optical fiber connection unit. The operation steps of assembly and connection are generally as follows: first strip a section of the optical cable with the protective layer to expose the bare fiber, so that the bare fiber can be used for splicing. Insert the optical fiber into the optical fiber connection unit through the optical fiber fixing device, and realize the docking with the pre-embedded optical fiber. When the optical fiber is spliced, push the optical fiber forward to make the bare fiber bend slightly in the optical fiber fixing device, so as to ensure that the optical fiber is connected well, and then temporarily fix the optical cable on the optical fiber fixing device. At this time, the optical fiber connection unit will press the butted optical fiber to realize the optical fiber connection, and then loosen the optical cable temporarily fixed on the optical fiber fixing device to restore the straight state of the optical fiber, and then fix the tail sleeve on the optical fiber fixing device to fix the optical cable on the fiber optic connector.

At present, there are many kinds of optical fibers used in the field, such as round cables of various diameters, figure-of-eight optical cables, etc. However, the traditional optical fiber fixing device is only suitable for a specific optical cable, so that the optical fiber connector can only be used to connect a specific optical cable, such as a circular optical cable with a diameter of φ3, and cannot meet various types of on-site optical fibers at the same time. use needs.

Contents of the invention

The object of the present invention is to provide an optical fiber connector, which can meet the needs of many different types of on-site optical fibers. Specifically, the optical fiber fixing device of the optical fiber connector is suitable for optical cables of different signal sizes, which can make Optical fiber connectors are used for splicing optical cables of various models and sizes.

The optical fiber connector according to the present invention includes an optical fiber splicing unit and an optical fiber fixing device connected to the optical fiber splicing unit, wherein the optical fiber fixing device has: a groove body; a cover body, the cover body is suitable for fitting and covering the A space suitable for accommodating and fixing the optical cable is formed on the groove body.

The cover body can be pivotally connected with the groove body. Specifically, the cover body and the groove body are integrally formed, and the connection between the cover body and the groove body forms a hinged structure. Advantageously, the cover body and the groove body are integrally formed of plastic, and the thickness of the joint is reduced to form a hinge structure.

The cover body and the groove body can also be independent parts, and then assembled together. Specifically, the cover body is independent from the groove body, and the cover body is detachably fixed on the groove body by using a locking structure.

Advantageously, the groove body has a substantially semicircular cross section, and the cover body has a substantially semicircular cross section, so that the space forms a substantially circular cross section. Further, both the groove body and the cover body are provided with protrusions that protrude toward the interior of the space. The positions of the protrusions on the groove body and the positions of the protrusions on the cover body are preferably opposite to each other. The protrusions on the groove body and the protrusions on the cover body may both be strip-shaped protrusions arranged substantially perpendicular to the longitudinal direction of the groove body. In addition, the edge of at least one strip-shaped protrusion in contact with the protective layer of the optical fiber to be fixed may be provided with at least one small protrusion protruding toward the interior of the space. The small protrusions may be tapered.

Optionally, the groove body and the cover body are arranged at one end of the optical fiber fixing device; the fiber fixing device is provided with a threaded connection part connected with the groove body, and the threaded connection part is formed with An external thread, the threaded connection part is provided with a through hole for the passage of the bare fiber; the optical fiber connector also includes a fixed boot, and the fixed boot is provided with an internal thread matched with the external thread.

Further, the threaded connection part is provided with a longitudinal slot, and the longitudinal slot extends radially inward to the through hole, and the bare fiber is suitable for radially bending into the longitudinal slot.

Further, a missing thread portion extending longitudinally across the entire threaded connection portion is formed on the threaded connection portion. Advantageously, the missing thread portion retains part of the thread teeth, and the missing thread portion and the internal thread form a first fixing structure suitable for placing and fixing a reinforcing rib of a circular optical cable. Optionally, a groove extending longitudinally across the entire threaded connection portion is provided at a position different from that of the missing thread portion on the threaded connection portion, and the groove is suitable for accommodating the sheath of a figure-eight optical cable, so The groove and the internal thread form a second fixing structure suitable for placing and fixing the outer skin of the 8-shaped optical cable; the end side of the groove body or the cover close to the threaded connection part is adjacent to the groove An opening is formed at the position, and the sheath of the figure-eight optical cable is adapted to lead out from the space into the groove through the opening. Optionally, both the groove body and the cover body have notches near the connection on the end side close to the threaded connection, and the notches of the groove body and the notch of the cover body are in common An opening is formed, and the sheath of the 8-shaped optical cable is adapted to be drawn out from the space through the opening; a groove extending longitudinally across the entire threaded connection is provided on the threaded connection at a position corresponding to the opening, and the The groove is suitable for accommodating the sheath of the figure-eight optical cable led out from the opening, and the groove and the internal thread form a second fixing structure suitable for placing and fixing the sheath of the figure-eight optical cable.

Advantageously, the threaded connection part is provided with a longitudinal slot at a position different from the groove and the missing thread part, and the longitudinal slot extends radially inward to the through hole, and the bare fiber is suitable for bent into the longitudinal slot.

Advantageously, the other end of the optical fiber fixing device is also provided with an insertion fitting end, and the threaded connection part is arranged between the insertion fitting end and the groove body; in the hole. Specifically, a pair of matching holes are provided on opposite sides of the optical fiber splicing unit; a pair of matching protrusions suitable for snap-fitting in the matching holes are provided on the insertion matching end.

The optical fiber connector of the present invention can at least meet the needs of field optical fiber splicing of round optical cables and figure-of-eight optical cables at the same time.

Description of drawings

FIG. 1 is a schematic perspective view of an optical fiber connector according to an embodiment of the present invention;

FIG. 2 is a schematic perspective view of an optical fiber fixing device according to an embodiment of the present invention;

3 is a side view of an optical fiber securing device showing a groove on a threaded connection, with the cover removed, according to one embodiment of the present invention;

4 is a side view of an optical fiber fixture according to one embodiment of the present invention, showing the missing thread on the threaded connection, with the cover removed;

Fig. 5 is a right side view of the optical fiber fixing device in Fig. 2 .

Detailed ways

Exemplary embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals designate the same or similar elements. The embodiments described below with reference to the figures are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

As shown in FIG. 1, the optical fiber connector according to the present invention includes an optical fiber splicing unit 4 and an optical fiber fixing device 5 connected to the optical fiber splicing unit 4, the optical fiber fixing device 5 has a groove body 2 and a cover body 1, The cover body 1 is adapted to fit and cover the groove body 2 to form a space suitable for accommodating and fixing the optical cable.

The cover body 1 can be pivotally connected with the groove body 2 .

The cover body 1 and the groove body 2 can be integrally formed, and the joint E of the cover body 1 and the groove body 2 forms a hinged structure. Specifically, one side of the cover body 1 is pivotally connected to the one side of the groove body 2 . When the cover body 1 covers the groove body 2, the other side of the cover body 1 covers the other side of the groove body 2 so that the groove body 2 and the cover The body 1 forms a space suitable for compressing and fixing the optical cable. For example, by fastening the cover body 1 on the groove body 2, the optical cable can be compressed and fixed.

Advantageously, the cover body 1 and the groove body 2 are integrally formed of plastic, and the thickness of the joint is reduced to form a hinge structure.

Although not shown, the cover body 1 and the groove body 2 can also be separate parts and then assembled together. Specifically, the cover body 1 is independent from the groove body 1, and the cover body 1 is detachably fixed on the groove body 2 by using a locking structure.

As shown in Fig. 1-2, the groove body 2 has a substantially semicircular cross section, and the cover body 1 has a substantially semicircular cross section, so that the space forms a substantially circular cross section. In the present invention, the side end of the cover body 1 can extend to a certain distance above the opposite side of the groove body 2, and the end of the cover body 1 is connected to the opposite side of the groove body 2 by pressing the cover body 1 down. contact, thereby compressing the optical cable. In another embodiment of the present invention, the end of the cover body 1 can also extend to the outside of the opposite side of the groove body 2, so that the optical cable can be compressed by fixing the cover body to the side of the groove body. At this time, the other side of the cover body 1 can be detachably locked on the other side of the groove body 2 by using a locking device.

As shown in FIGS. 1-3 , both the groove body 2 and the cover body 1 are provided with protrusions 11 protruding into the space, so as to further limit the space and fix the optical cable more firmly. As shown in FIGS. 1-2 , the positions of the protrusions 11 on the groove body 2 and the positions of the protrusions 11 on the cover body 1 are opposite to each other. However, the protrusions 11 on the groove body 2 and the protrusions 11 on the cover body 1 can also be staggered from each other.

Preferably, the protrusions 11 on the groove body 2 and the protrusions 11 on the cover body 1 are strip-shaped protrusions arranged substantially perpendicular to the longitudinal direction of the groove body 2 . Further, as shown in FIGS. 2-3 , at least one small protrusion 12 is provided on the edge of at least one strip-shaped protrusion in contact with the protective layer of the optical fiber to be fixed, and the small protrusion 12 protrudes toward the interior of the space. Advantageously, said edge of each strip-shaped protrusion is provided with at least one small protrusion 12, so that said space can be further defined. The small protrusion 12 can be tapered, but can also adopt other shapes, such as cylindrical, as long as it is suitable for clamping the protective layer of the optical fiber to be fixed.

With the above-mentioned structure with protrusions 11, the protective layer of the optical fiber can be effectively fixed.

As shown in Figure 1, the groove body 2 and the cover body 1 are arranged at one end of the optical fiber fixing device 5; the fiber fixing device 5 is provided with a threaded connection part connected with the groove body 2 52, the threaded connection portion 52 is formed with external threads, the threaded connection portion 52 is internally provided with a through hole 54 for the bare fiber D to pass through; the optical fiber connector also includes a fixed boot 7, the fixed boot 7 inside An internal thread matched with the external thread is provided. After the optical fiber splicing unit 4 finishes splicing the optical fibers, the tail sleeve 7 is fixed to fix the optical cable on the optical fiber fixing device 5 .

As shown in Fig. 2-3, described screw connection part 52 is provided with longitudinal groove 53, and this longitudinal groove 53 radially inwardly extends to described through hole 54 (at this moment, this through hole actually forms groove form), and when the bare fiber D is bent under force, the bare fiber D is suitable for radially bending into the longitudinal slot. The bending of the bare fiber D can be seen by means of the longitudinal slot 53 .

As shown in FIG. 5 , a missing thread portion 521 extending longitudinally across the entire threaded connection portion 52 is formed on the threaded connection portion 52 . Advantageously, the thread missing part 521 retains part of the thread teeth (that is, the thread missing part 521 still retains the thread, and does not "damage" the small diameter of the threaded connection part 52), and the thread missing part 521 and the internal thread Forming a first fixing structure suitable for placing and fixing a reinforcing rib, such as Kevlar, of a circular optical cable. After the fixed boot 7 is threaded on the threaded connection part, the protective layer of the circular optical cable can be fixed, thereby fixing the circular optical cable. Of course, the sheath of the figure-eight optical cable can also be fixed by the thread missing part 521 .

As shown in FIG. 2 , the first side of the groove body 52 and the first side of the cover body 1 are both formed with notches 21 on the end side close to the threaded connection portion 52 , the groove body The notch 21 and the notch 21 of the cover jointly form an opening through which the sheath of the figure-eight optical cable is adapted to be drawn out from the space; The groove 523 of the entire threaded connection part is suitable for accommodating the sheath of the figure-eight optical cable drawn out from the opening, and the groove 523 and the internal thread form a shape suitable for placing and fixing the figure-eight optical cable. The second fixed structure of the outer skin.

The above-mentioned openings may only be provided on the groove body or the cover body. Specifically, a groove 523 extending longitudinally across the entire threaded connection portion 52 is provided at a position different from that of the missing thread portion 521 on the threaded connection portion 52, and the groove 523 is suitable for accommodating a figure-eight optical cable. The outer skin of the groove 523 and the inner thread form a second fixing structure suitable for placing and fixing the outer skin of the 8-shaped optical cable; the groove body 2 or the cover body 1 is close to the threaded connection part 52 An opening is formed on the end side adjacent to the groove 523 , and the sheath of the figure-eight optical cable is adapted to lead out from the space into the groove 523 through the opening.

After the fixed tail sleeve 7 is threaded on the threaded connection part, the sheath of the figure-eight optical cable can be fixed, thereby fixing the figure-eight optical cable.

In fact, the groove 523 , the missing thread portion 521 and the longitudinal slot 53 can be simultaneously provided on the threaded connection portion 52 . Specifically, the threaded connection portion 52 is provided with a longitudinal slot 53 at a position different from the groove 523 and the missing thread portion 521, and the longitudinal slot 53 extends radially inward to the through hole 54 ( At this time, the through hole actually forms a groove), and when the bare fiber D is bent under force, the bare fiber D is suitable for radially bending into the longitudinal slot 53 . The bending of the bare fiber D can be seen by means of the longitudinal slot 53 .

As shown in Figure 1, the other end of the optical fiber fixing device 5 is also provided with an insertion fitting end 55, and the threaded connection portion 52 is arranged between the insertion fitting end 55 and the groove body 2; the insertion fitting The end 55 is insertion-fitted into the insertion hole of the optical fiber splicing unit 4 . A buckle structure can be provided between the optical fiber fixing device 5 and the optical fiber connection unit 4, specifically, a pair of matching holes 41 are provided on opposite sides of the optical fiber connection unit 4; A pair of matching protrusions 51 in the matching hole 41 .

The usage method of the optical fiber connector of the present invention is introduced as follows. First strip a section of the optical cable with the protective layer to expose the optical fiber, so that the optical fiber can be used for splicing; the optical fiber is passed through the interior of the optical fiber fixing device 5, and pushed forward, so that the optical fiber is bent inside the optical fiber fixing device 5, from the groove ( or through hole) and the longitudinal slot 53 directly above the external thread can easily see the bending of the optical fiber, so as to ensure that the optical fiber is connected well; Fix on the optical fiber fixing device 5, so as to finally fix the optical cable; then put on the shell and the protective cover, and the connection of the optical fiber connector is completed.

When splicing the optical fibers of the circular optical cable, the circular optical cable is placed in the space formed by the groove body and the cover body. The reinforcing rib A of the optical cable, such as Kevlar, is placed at the thread missing part 521 of the external thread. When the internal thread of the fixed boot 7 is fixedly connected with the external thread, the Kevlar is fixed at the same time, thereby fixing the circular optical cable .

When splicing the figure-eight optical cable, cut off the sheath B on the upper side of the figure-eight optical cable, and extend the sheath C on the lower side into the groove 523 at the corresponding position of the external thread through the opening. At this time, when the internal thread of the fixed boot 7 is fixedly connected with the external thread, the figure-eight optical cable sheath is fixed therein at the same time, thereby fixing the figure-eight optical cable.

However, it should be pointed out that only by using the above-mentioned matching structure of the groove body 2 and the cover body 1, the sheath of the figure-eight optical cable can also be fixed in the space formed by the groove body 2 and the cover body 1, and There is no need to lead the sheath of the figure-eight cable out of the space into the groove 523 through the opening.

While embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention. The scope of application of the present invention is defined by the appended claims and their equivalents.

Claims (19)

1. joints of optical fibre comprise:

Fibre junction unit (4); And

Optic fibre fixing device (5) is connected with described fibre junction unit,

Wherein:

Described optic fibre fixing device has:

Groove body (2); And

Lid (1), described lid are suitable for cooperating and cover on the described groove body and form and be suitable for holding and the fixing space of optical cable.

2. the joints of optical fibre according to claim 1, wherein:

Described lid (1) pivots with described groove body (2) and is connected.

3. the joints of optical fibre according to claim 2, wherein:

Described lid (2) is one-body molded with described groove body (2), and the junction of lid and groove body forms articulated structure.

4. the joints of optical fibre according to claim 3, wherein:

Described lid (1) and described groove body (2) are one-body molded by plastic cement, and the thickness of described junction reduces to form articulated structure.

5. the joints of optical fibre according to claim 1, wherein:

Described lid (1) is independent of described groove body (2), and described lid utilizes buckle structure removably to be fixed on the described groove body.

6. the joints of optical fibre according to claim 1, wherein:

Described groove body (2) has roughly semi-circular cross-section, and described lid (1) has roughly semi-circular cross-section, thereby described space forms the circular xsect.

7. the joints of optical fibre according to claim 1, wherein:

Be provided with the projection (11) of protruding to described interior volume in described groove body and the described lid.

8. the joints of optical fibre according to claim 7, wherein

The position of the projection on the groove body and the position of the projection on the lid are toward each other.

9. the joints of optical fibre according to claim 8, wherein:

Projection (11) on projection (11) on the described groove body and the described lid is the fillet of the vertical layout that is approximately perpendicular to the groove body.

10. the joints of optical fibre according to claim 9, wherein:

The edge that the protective seam with treating fixed fiber of at least one described fillet contacts is provided with at least one kick (12), and this kick is protruded towards described interior volume.

11. each described joints of optical fibre according to claim 1-10, wherein:

Described groove body (2) and described lid (1) are arranged on an end of described optic fibre fixing device (5);

Described optic fibre fixing device is provided with the threaded joints (52) that is connected with described groove body, described threaded joints is formed with external thread, and this threaded joints inside is provided with the through hole (54) that the naked fibre of the confession that communicates with described spatial accommodation (D) passes through;

The described joints of optical fibre also comprise fixedly tail cover (7), the inner internal thread that cooperates with described external thread that is provided with of described fixedly tail cover.

12. the joints of optical fibre according to claim 11, wherein:

Be provided with longitudinal grooved (53) on the described threaded joints (52), this longitudinal grooved extends radially inwardly to described through hole (54), and naked fibre (D) is suitable for radially bending in the described longitudinal grooved (53).

13. the joints of optical fibre according to claim 11, wherein:

Be formed with the screw thread disappearance section (521) that extended longitudinally whole described threaded joints on the described threaded joints (52).

14. the joints of optical fibre according to claim 13, wherein:

The upper position different from the position at described screw thread disappearance section (521) place of described threaded joints (52) is provided with longitudinal extension and crosses the groove of whole described threaded joints (523), this groove is suitable for holding the crust (C) of 8-shaped optical cable, and described groove and described internal thread form and be suitable for placing and fixing the second fixed sturcture of the crust of 8-shaped optical cable;

Described groove body or described lid are formed with opening near the distolateral position at contiguous described groove of described threaded joints, and the crust of 8-shaped optical cable (C) is suitable for being drawn out to the groove (523) from described space by this opening.

15. the joints of optical fibre according to claim 13, wherein:

Described groove body and described lid are near the distolateral breach (21) that all is formed with described junction near described threaded joints, opening of the common formation of the breach of described groove body and the breach of described lid, the crust of 8-shaped optical cable (C) is suitable for drawing from described space by this opening;

The upper position corresponding to described opening of described threaded joints (52) is provided with longitudinal extension and crosses the groove of whole described threaded joints (523), described groove is suitable for holding the crust (C) of the 8-shaped optical cable of drawing from described opening, and described groove and described internal thread form and be suitable for placing and fixing the second fixed sturcture of the crust of 8-shaped optical cable.

16. the joints of optical fibre according to claim 14, wherein:

Described threaded joints (52) is provided with longitudinal grooved (53) in the position that is different from described groove (523) and described screw thread disappearance section (521), this longitudinal grooved extends radially inwardly to described through hole, and naked fibre (D) is suitable for radially bending in the described longitudinal grooved.

17. the joints of optical fibre according to claim 15, wherein:

Described threaded joints (52) is provided with longitudinal grooved (53) in the position that is different from described groove (523) and described screw thread disappearance section (521), this longitudinal grooved extends radially inwardly to described through hole, and naked fibre (D) is suitable for radially bending in the described longitudinal grooved.

18. the joints of optical fibre according to claim 11, wherein:

The other end of described optic fibre fixing device (5) also is provided with and inserts abutting end (55), and threaded joints (52) is arranged between described insertion abutting end (55) and the described groove body (2);

Described insertion abutting end (55) inserts and is coupled to inserting in the hole of fibre junction unit (4).

19. the joints of optical fibre according to claim 18, wherein:

The opposite flank of described fibre junction unit (4) is provided with a pair of mating holes (41);

Described insertion abutting end (55) is provided with a pair of fitting projection (51) that is suitable for snapping in the described mating holes.

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