Inner core assembly of optical fiber connector

Abstract

The utility model discloses an inner core assembly of an optical fiber connector, which comprises a main shaft and a tail sleeve, an optical fiber positioning mechanism is arranged at the front end of the main shaft, an optical cable fixing mechanism is arranged at the rear end of the main shaft, and the inner core assembly is characterized in that the optical cable fixing mechanism comprises a crimping shaft and a crimping sleeve, and the crimping sleeve is sleeved on the crimping shaft. A thin steel wire in the optical cable penetrates through a gap between the crimping sleeve and the crimping shaft, a positioning convex block is integrally arranged on the crimping shaft, a clamping groove and an elastic clamping pin are arranged on the side wall of the rear end of the main shaft, the crimping shaft is inserted into the rear end of the main shaft, the positioning convex block is clamped into the clamping groove, and the elastic clamping pin abuts against the positioning convex block, so that the crimping shaft is fixed in the main shaft; the optical fiber connector has the advantages that the assembling efficiency of the optical fiber connector is well improved by adopting the optical fiber positioning mechanism, and when the optical fiber is broken in the assembling process, the crimping shaft can be detached from the main shaft without damage, so that the main shaft, the crimping shaft and other parts for fixing the optical fiber can be repeatedly used, and the loss cost is reduced.

Description

Technical Field

[0001] The utility model relates to an outdoor waterproof quick connector used for optical fiber communication, in particular to an inner core assembly of an optical fiber connector. Background Art

[0002] In the indoor installation of optical fibers, optical fiber boxes are generally installed in corridors or on the outer walls of buildings. Multiple indoor optical fibers in the same area are connected and communicate with the main optical fiber through the optical fiber boxes, which not only saves costs but also facilitates the installation of optical fibers. The connection of optical fibers is basically to install a quick connector on the optical cable pigtail, and the quick connector is inserted into the connection flange in the optical fiber box to achieve the connection and communication between optical fibers.

[0003] In the current optical fiber quick connectors, the fixing structure for the optical cable is relatively complicated. For example, the Chinese utility model patent with the patent number ZL202222808349.0 discloses an inner core structure of an optical fiber quick connector. After passing the optical cable through the copper sleeve, the front end of the compression ring is sleeved on the copper sleeve and crimped and fixed to the copper sleeve with pliers. The rear end of the compression ring is crimped and fixed to the sheath-wrapped optical fiber. The lug has a wire groove and a lug foot. A bayonet is provided on the main body, a lug foot hole is provided on one side of the main body opposite to the bayonet. The lug is pressed into the bayonet, the sheath is clamped into the wire groove, and the lug foot on the lug is clamped into the lug foot hole, so as to fix the optical cable in the main body. This optical cable fixing structure requires many parts and complex assembly, which reduces the assembly efficiency of the optical fiber connector. Moreover, once the optical fiber in the optical cable is broken, the parts in this optical cable fixing structure cannot be reused. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide an inner core assembly of an optical fiber connector, which improves the assembly efficiency, and when the optical fiber is broken, the parts for fixing the optical fiber can be reused, reducing the cost.

[0005] The technical solution adopted by the utility model to solve the above technical problem is: an inner core assembly of an optical fiber connector, including a main shaft and a tail sleeve. An optical fiber positioning mechanism is arranged at the front end of the main shaft, and an optical cable fixing mechanism is arranged at the rear end of the main shaft. The tail sleeve is sleeved on the rear end of the main shaft and covers the optical cable fixing mechanism. The optical cable fixing mechanism includes a crimping shaft and a crimping sleeve. The crimping shaft is used for passing through the optical fiber of the optical cable. The crimping sleeve is sleeved on the crimping shaft. When the optical fiber passes through the crimping shaft, the thin steel wire in the optical cable passes through the gap between the crimping sleeve and the crimping shaft. A positioning convex block is integrally arranged on the crimping shaft. A clamping groove and an elastic clamping foot are arranged on the side wall of the rear end of the main shaft. The crimping shaft is inserted into the rear end of the main shaft, and the positioning convex block is clamped into the clamping groove, and the elastic clamping foot abuts against the positioning convex block, so that the crimping shaft is fixed in the main shaft.

[0006] Further, a heat shrinkable sleeve for waterproofing is provided at the rear end of the main shaft. The heat shrinkable sleeve simultaneously covers the card slot, the rear end of the crimping sleeve, and the optical cable.

[0007] Further, the optical fiber positioning mechanism includes a ceramic ferrule, a ferrule sleeve, and a spring. The ceramic ferrule is inserted into the front end of the main shaft. The spring abuts between the front end of the main shaft and the ceramic ferrule. The optical fiber passes through the ceramic ferrule. The ferrule sleeve is sleeved on the ceramic ferrule, and a locking mechanism is provided between the ferrule sleeve and the front end of the main shaft.

[0008] Further, the locking mechanism includes a locking protrusion provided on the outer surface of the front end of the main shaft. A locking hole is provided on the side wall of the ferrule sleeve. The locking protrusion cooperates with the locking hole.

[0009] Further, a clamping block for docking with the connecting flange is integrally provided on the outer surface of the ferrule sleeve.

[0010] Further, a connecting nut is sleeved on the main shaft. The connecting nut is provided with an internal thread. Through the internal thread, the connecting nut can be connected to different types of outer sleeves.

[0011] Compared with the prior art, the advantages of the present utility model are that the optical fiber positioning mechanism fixes the optical cable by the cooperation of the crimping shaft and the crimping sleeve, which greatly improves the assembly efficiency of the optical fiber connector. Compared with the traditional optical fiber connector, its assembly efficiency is increased by more than 50%. And when the optical fiber breaks during the assembly process, the crimping shaft can be removed from the main shaft without damage, so that the main shaft, the crimping shaft and other components for fixing the optical fiber can be reused, reducing the loss cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a perspective structural view of the present utility model;

[0013] Figure 2 is a cross-sectional view of the present utility model;

[0014] Figure 3 is an exploded view of the present utility model;

[0015] Figure 4 is a connection schematic diagram of the present utility model with different types of outer sleeves I;

[0016] Figure 5 is a connection schematic diagram of the present utility model with different types of outer sleeves II;

[0017] Figure 6This is the third schematic diagram of the connection between the present utility model and different types of outer sleeves. Detailed implementation manners

[0018] The present utility model will be further described in detail below in conjunction with the embodiments with reference to the drawings.

[0019] As shown in the figure, an inner core assembly of an optical fiber connector includes a main shaft 1 and a tail sleeve 2. A fiber optic positioning mechanism is provided at the front end of the main shaft 1. The fiber optic positioning mechanism includes a ceramic ferrule 3, a ferrule sleeve 4 and a spring 5. The ceramic ferrule 3 is inserted into the front end of the main shaft 1. The spring 5 abuts between the front end of the main shaft 1 and the ceramic ferrule 3. The optical fiber 101 passes through the ceramic ferrule 3. The ferrule sleeve 4 is sleeved on the ceramic ferrule 3, and a locking mechanism is provided between the ferrule sleeve 4 and the front end of the main shaft 1. The locking mechanism includes a locking protrusion 11 provided on the outer surface of the front end of the main shaft 1. A locking hole 41 is provided on the side wall of the ferrule sleeve 4. The locking protrusion 11 cooperates with the locking hole 41. A clamping block 42 for docking with a connection flange in an optical fiber box is integrally provided on the outer surface of the ferrule sleeve 4. A cable fixing mechanism is provided at the rear end of the main shaft 1. The cable fixing mechanism includes a crimping shaft 6 and a crimping sleeve 7. The crimping shaft 6 is used for threading the optical fiber 101 in the optical cable 100. The crimping sleeve 7 is sleeved on the crimping shaft 6. When the optical fiber 101 passes through the crimping shaft 6, the fine steel wire 102 in the optical cable 100 passes through the gap between the crimping sleeve 7 and the crimping shaft 6. A positioning protrusion 61 is integrally provided on the crimping shaft 6. A card slot 12 and an elastic clamping foot 13 are provided on the side wall of the rear end of the main shaft 1. The crimping shaft 6 is inserted into the rear end of the main shaft 1, and the positioning protrusion 61 is snapped into the card slot 12, and the elastic clamping foot 13 abuts against the positioning protrusion 61, so that the crimping shaft 6 is fixed in the main shaft 1. A heat shrinkable sleeve 8 for waterproofing is provided at the rear end of the main shaft 1. The heat shrinkable sleeve 8 simultaneously covers the card slot 12, the rear end of the crimping sleeve 7 and the optical cable 100. The tail sleeve 2 is tightly sleeved on the rear end of the main shaft 1 and covers the cable fixing mechanism. A connection nut 9 is sleeved on the main shaft 1. The connection nut 9 is provided with an internal thread, and the connection nut 9 can be connected to different types of outer sleeves 200 through the internal thread.

[0020] In the above embodiments, the connection process between the inner core component and the optical fiber is as follows: successively sleeving the tail sleeve 2, heat shrinkable sleeve 8, crimping sleeve 7, and crimping shaft 6 on the optical cable 100, passing the optical fiber 101 in the optical cable 100 through the crimping shaft 6, placing the fine steel wire 102 in the optical cable 100 outside the crimping shaft 6, and sleeving the crimping sleeve 7 on the crimping shaft 6, so that the fine steel wire 102 passes through the gap between the crimping sleeve 7 and the crimping shaft 6, then folding the fine steel wire 102 backward and attaching it to the outer surface of the crimping sleeve 7, and then inserting the crimping shaft 6 with the crimping sleeve 7 sleeved thereon into the rear end of the main shaft 1. The positioning convex block 61 on the crimping shaft 6 is snapped into the card slot 12 on the main shaft 1, and the elastic clamping feet 13 are abutted against the positioning convex block 61, so that the crimping shaft 6 is fixed in the main shaft 1. At the same time, the crimping sleeve 7 is deformed under the extrusion of the main shaft 1, so that the fine steel wire 102 is tightly fixed between the crimping sleeve 7 and the crimping shaft 6. Heating the heat shrinkable sleeve 8 to tightly wrap the card slot 12, the rear end of the crimping sleeve 7, and the optical cable 100 to play a role in dust and water prevention. Then tightly sleeving the tail sleeve 2 on the rear end of the main shaft 1, passing the optical fiber 101 successively through the main shaft 1, spring 5, and ceramic ferrule 3, inserting the ceramic ferrule 3 into the front end of the main shaft 1, with the spring 5 abutted between the front end of the main shaft 1 and the ceramic ferrule 3. Finally, sleeving the ferrule 4 on the ceramic ferrule 3, and the locking hole 41 on the ferrule 4 is buckled with the locking convex block 11 on the main shaft 1 to complete the connection between the optical fiber and the inner core component.

[0021] The protection scope of the present utility model includes but is not limited to the above embodiments. The protection scope is subject to the claims. Any replacement, deformation, and improvement that are easily conceivable by those skilled in the art to this technology fall within the protection scope of the present utility model.

Claims

1. An inner core assembly of an optical fiber connector, comprising a main shaft and a tail sleeve. An optical fiber positioning mechanism is provided at the front end of the main shaft, and an optical cable fixing mechanism is provided at the rear end of the main shaft. The tail sleeve is sleeved on the rear end of the main shaft and covers the optical cable fixing mechanism, and is characterized in that: The described optical cable fixing mechanism includes a crimping shaft and a crimping sleeve. The crimping shaft is used to pass through the optical fiber of the optical cable. The crimping sleeve is sleeved on the crimping shaft. When the optical fiber passes through the crimping shaft, the fine steel wire in the optical cable passes through the gap between the crimping sleeve and the crimping shaft. A positioning convex block is integrally provided on the crimping shaft. A card slot and an elastic card foot are provided on the rear side wall of the main shaft. The crimping shaft is inserted into the rear end of the main shaft, and the positioning convex block is snapped into the card slot, and the elastic card foot abuts against the positioning convex block, so that the crimping shaft is fixed in the main shaft.

2. The inner core assembly of an optical fiber connector according to claim 1, characterized in that: A heat shrinkable sleeve for waterproofing is provided at the rear end of the main shaft. The heat shrinkable sleeve simultaneously covers the card slot, the rear end of the crimping sleeve and the optical cable.

3. The inner core assembly of an optical fiber connector according to claim 1, characterized in that: The described optical fiber positioning mechanism includes a ceramic ferrule, a ferrule sleeve and a spring. The ceramic ferrule is inserted into the front end of the main shaft. The spring abuts between the front end of the main shaft and the ceramic ferrule. The optical fiber passes through the ceramic ferrule. The ferrule sleeve is sleeved on the ceramic ferrule, and a locking mechanism is provided between the ferrule sleeve and the front end of the main shaft.

4. The inner core assembly of an optical fiber connector as claimed in claim 3, wherein: The described locking mechanism includes a locking convex block provided on the outer surface of the front end of the main shaft. A locking hole is provided on the side wall of the ferrule sleeve. The locking convex block cooperates with the locking hole.

5. The inner core assembly of an optical fiber connector according to claim 3, characterized in that: A clamping block for docking with the connection flange is integrally provided on the outer surface of the ferrule sleeve.

6. The inner core assembly of an optical fiber connector according to claim 1, characterized in that: A connection nut is sleeved on the main shaft. The connection nut is provided with an internal thread, and through the internal thread, the connection nut can be connected to different types of outer sleeves.

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