CN100451706C - Environment-resistance optical fiber connector - Google Patents

Abstract

The present invention relates to an environment resistance optical fiber connector. A free end connector and a fixed end connector, or a free end and the free end connector of the present invention adopt a neutral double-bayonet type fast connection and separation structure; when the optical fiber connector is inserted, an optical fiber joint assembly on a positioning hole of the free end connector is inserted with a butt joint hole of the abutted free end connecter or the abutted fixed end connecter, a positioning pin and an abutted guide hole are inserted together, a locking pin and an abutted locking hole are clamped together, and a main casing body made of metallic material and a multiple positioning locking device are used. The optical fiber connector has the properties of vibration resistance, impact resistance, tensile resistance, water resistance, high temperature resistance and corrosion resistance; in addition, the optical fiber connector has the characteristics of accurate positioning, small succession attenuation, high echo coefficient, firm dynamic locking, stable optical fiber transmission, etc.; a flange and a sealing ring which are arranged on the fixed end connector are convenient for sealing and fixing installation. The present invention has the connection form of a free end and another free end and has strong connection randomness and convenient and rapid maintenance. Thereby, the present invention is more suitable for a long distance field communication network.

Description

Environment Resistant Fiber Optic Connectors

technical field

The invention relates to a connector, in particular to an optical fiber connector used in aerospace systems and military equipment systems resistant to harsh environments.

Background technique

At present, optical fiber connectors in commercial and military/aerospace applications include free-end connectors and fixed-end connectors. The connection methods between the free end and the free end, and between the free end and the fixed end are threaded connections, which are cumbersome to connect and slow to connect and separate. , there is no anti-loose safety device; and the locking sleeve is made of plastic parts. Due to the inevitable deformation error in the molding process of the plastic parts, the locking part of the optical fiber plastic part connector is easy to loosen, and it does not have waterproof and salt spray performance. The tensile strength is low, and the docking is easy to shift, resulting in large insertion loss, low return loss, and unstable data transmission.

Contents of the invention

In order to overcome the shortcomings of the prior art, the object of the present invention is to provide an optical fiber connector that is resistant to harsh environments in military and aerospace applications, has small connection attenuation, reliable dynamic locking, and more stable transmission.

The technical solution adopted in the present invention: an environment-resistant optical fiber connector mainly includes a free-end connector and a fixed-end connector. The long wire protection barrel in the inner cavity of the locking sleeve is covered with a copper washer, a head pressure spring, a spring locking cap and a head and tail cover locking cap, which are screwed on the tail of the long wire protection tube in turn, and the head and tail cover The end of the tightening cap is covered with a waterproof rubber sleeve, and the inner cavity of the long protective tube is equipped with an optical cable fixing component; An optical fiber connector assembly is installed in the hole, and an optical fiber ceramic connector is installed in the docking hole; a locking pin is provided on both sides of the cylinder of the locking sleeve interface, and a locking hole and a locking pin are respectively provided on the locking feet protruding from both sides. groove;

The fixed-end connector includes a plug body installed in the inner cavity of the locking sleeve interface, and the tail of the plug body is connected with a long wire protection tube placed in the inner cavity of the locking sleeve. The tightening cap and the head and tail cover tightening cap are screwed on the tail of the long protective tube in turn, the end of the head and tail cover is covered with a waterproof rubber sleeve, and the inner cavity of the long protective tube is equipped with an optical cable fixing component; the plug body is plugged in There are optical fiber positioning holes, docking holes, positioning pins, positioning pin guide holes and end face sealing rings on the surface, optical fiber connector components are installed in the positioning holes, and optical fiber ceramic connectors are installed in the docking holes; there is a lock on both sides of the cylinder of the locking sleeve. There is a locking pin and a locking hole and a locking groove on the locking feet protruding from the other two sides; the cylindrical surface of the locking sleeve is provided with a mounting flange and a flange sealing ring, and the tail of the plug body in the inner cavity of the locking sleeve is connected There is a bowl-shaped Kafala optical cable locking body in the body of the short protective barrel, and there are multiple anti-rotation concave holes on the locking body, which are in a state of cooperation with the stop screw at the end of the short protective barrel;

The optical fiber connector assembly on the positioning hole of the free-end connector is in a mating state with the docking hole on the docked free-end connector or the fixed-end connector, and the positioning pin is in a mating state with the docking guide hole, and the two locks The locking pin is engaged with the locking hole on the docked locking foot.

The above-mentioned optical cable fixing component includes a crimping body, a locking ring, and a locking sleeve. The cylindrical surface of the crimping body is provided with a plurality of optical cable skeletons that are locked by the locking ring and the locking sleeve. The hole is matched with the stop screw at the end of the long grommet.

Two backstop screws are provided at the joint between the tail end of the plug body and the long protective barrel, and a sealing ring and a positioning groove are provided on the cylindrical surface of the plug body.

The optical fiber joint assembly in the positioning hole includes an optical fiber ceramic joint fixed in a positioning sleeve, the positioning sleeve is covered with an inner sheath and an outer sheath, and the outer sheath is screwed on the positioning hole.

The optical fiber ceramic connector tailstock is covered with a compression spring and a compression spring sleeve, and is limited by a cover plate locked at the tail end of the plug body.

2-5 sealing rings are arranged on the spring fastening cap.

The tail end of the free-end connector or the fixed-end connector can be connected with a wire protection spring sleeved on the optical cable.

The locking sleeves of the free-end and fixed-end connectors are made of aluminum alloy, copper alloy or stainless steel.

The invention adopts a neutral double bayonet fast connection and separation structure, and adopts a unique metal main shell material structure and multiple positioning locking devices, so that the connector has anti-vibration, impact resistance, tensile resistance, waterproof, high temperature resistance, Corrosion resistance and other properties, and has the characteristics of accurate positioning, small connection attenuation, high echo coefficient, reliable dynamic locking, and more stable and reliable optical fiber transmission. The connector has the connection form of free end and free end, free end and fixed end, especially the connection form of free end and free end, which has strong connection randomness, convenient and quick maintenance, and is more suitable for long-distance field connection and transmission.

Description of drawings

Fig. 1 is a schematic structural view of the free end connector of the present invention;

Fig. 2 is a schematic structural view of the fixed end connector of the present invention;

Fig. 3 is a schematic diagram of the connection between the free end connector and the fixed end connector of the present invention;

Fig. 4 is a schematic diagram of the connection between the free-end connector and the free-end connector of the present invention.

In the accompanying drawings, locking foot 1, locking hole 2, end face sealing ring 3, plug body 4, locking sleeve 5, sealing ring 6, stop screw 7, positioning groove 8, locking sleeve inner wall convex key 9, length Protective barrel 10, copper washer 11, head pressure spring 12, sealing ring 13, spring tightening cap 14, stop screw 15, anti-rotation concave hole 16, head and tail cover tightening cap 17, waterproof rubber sleeve 18, optical cable 19 , tightening sleeve 20, locking ring 21, crimping body 22, optical cable skeleton 23, optical fiber 24, fastening screw 25, cover plate 26, compression spring sleeve 27, compression spring 28, locking sleeve 29, positioning guide hole 30 , docking hole 31, inner sheath 32, locking groove 33, optical fiber ceramic connector 34, 35, positioning sleeve 36, outer sheath 37, positioning pin 38, optical fiber positioning hole 39, mounting flange 40, flange sealing ring 41, short wire protection barrel 42, anti-rotation concave hole 43, back-stop screw 44, Kafala optical cable locking body 45.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

The free-end connector shown in Figure 1 is composed of a locking sleeve 5, a plug body 4, a long grommet 10, and a tail assembly. The plug body 4 is placed in the inner cavity of the locking sleeve 5, and the tail of the plug body is connected to the long grommet. 10. It is positioned by two stop screws 7 at the end of the plug body to prevent loose connection with the long wire protection barrel; the head pressure spring 12 on the long wire protection barrel can keep the plug body in good condition under high vibration or impact environment The dynamic connection state can ensure the airtight fit of the butt joint surface; the cylinder of the plug body is covered with a sealing ring 6, so that the cylinder surface is sealed with the inner wall of the locking sleeve 5, and is more waterproof; the positioning groove 8 of the cylinder surface of the plug body 4 is in contact with the lock The convex keys 9 on the inner wall of the tight sleeve cooperate to limit each other, so that the optical fiber will not be twisted due to the rotation of the plug body, and fast docking is ensured; multiple sealing rings 13 on the cylindrical surface of the spring tightening cap 14 screwed on the tail end of the long grommet and the The inner wall of the tail end of the locking sleeve 5 is closely matched to ensure that the tail of the locking sleeve is waterproof, and the connection between the head and tail cover splicing cap 17 with the cable waterproof rubber sleeve 18 and the tail end of the long wire protection tube in the locking sleeve is connected, so that the The optical cable 19 wherein is more waterproof, anti-bending. The mating surface of the plug body is provided with a positioning pin 38, a guide hole 30 and a sealing ring 3. When the free end and the free end or the free end and the fixed end connector are mated, they play the role of mutual positioning, mutual guidance and mutual sealing; The mating surface of the body is also provided with a positioning hole 39 and a docking hole 31. An optical fiber ceramic connector 34 is installed in the docking hole, and an optical fiber connector assembly is installed in the positioning hole. The outer sheath 37 on the optical fiber ceramic connector 35 is screwed tightly to the positioning hole 39. On the surface, it not only protects the ceramic connector, but also accurately docks with the docking holes on the end face of the docked plug body, which ensures the precise contact of the optical fiber ceramic connectors in the two holes when mating, and the stable connection of data signal transmission. The cover plate 26 fixed on the tail end of the plug body 4 by the fastening screw 25 can press the two ceramic connectors 34, 35 more tightly to the docking hole 31 and position them through the compression spring 28 and the compression spring sleeve 27 on the ceramic connector tailstock. Inside hole 39. The optical cable 19 passes through the rubber sleeve 18, the head and tail cover tightening cap 17 and enters the inner hole of the spring tightening sleeve 14, and the optical cable skeleton 23 is fixed on the crimping body 22 in the long wire protection barrel 10, and is tightened by the locking ring 21, The sleeve 20 is compressed to prevent the optical cable from being broken by external force, and the optical fiber 24 is pierced through the inner hole of the crimping body 22 to connect the positioning hole and the ceramic joint in the docking hole respectively.

As shown in Figure 2, the flange 40 on the outer cylindrical surface of the locking sleeve of the fixed end connector is installed on the equipment panel, and its flange sealing ring 41 can be sealed and matched with the equipment to play a waterproof and anti-vibration role; the tail of the plug body is connected The short grommet 42 has a bowl-shaped kafala locking body 45 in its inner cavity, which can fix the kafala on the optical cable in the short grommet, so that the optical fiber will not be broken due to external force. Except for the above-mentioned connection structure of the fixed end connector, the structure of other parts is the same as that of the free end connector.

As shown in Figure 3, locking pins 29 are provided on both sides of the interface cylinder of the locking sleeve 5 of the free-end connector and the fixed-end connector, and locking pins 29 are also provided on the locking feet 1 protruding from the other two sides. Groove 33 and locking hole 2. When the free-end connector is mated with the fixed-end connector, the locking pin 29 rotates clockwise along the docking locking groove and falls into the locking hole, and a crisp locking sound can be heard, making them connected to each other. Lock tightly. When separating, turn counterclockwise until the locking pin slides out of the butted locking hole and locking groove, then it can be pulled out. The fixed-end connector can also be equipped with a demultiplexer, which can transmit multiple data signals. The end of the connector can also be equipped with a protective wire spring, which can resist the bending of the optical cable. This mating method is suitable for the connection between optical cables and equipment, and can be widely used in optical fiber LAN and fiber-to-the-home, etc.

The free-end connector shown in FIG. 4 is mated and separated from the free-end connector in the same way as the connection shown in FIG. 3 . This mating method is suitable for long-distance field connection between optical cables, and can be widely used in field optical cables, communication networks, and fiber to the roadside.

Claims (6)

1, a kind of environment-resistance optical fiber connector, mainly comprise free connector, stiff end connector, it is characterized in that: free connector comprises that lock sleeve (5) interface inner chamber is equipped with plug body (4), the connection of plug body afterbody places the length of lock sleeve inner chamber to protect line tube (10), long protecting is with copper washer (11), a stage clip (12) on the line tube, spring piece together tight cap (14) and end to end cover piece together tight cap (17) and be tightened in the long line tube afterbody that protects successively, the tight cap tail end of cover assembly is with water-proof rubber sleeve (18) end to end, and length is protected the line tube inner chamber and is provided with the optical cable fixation kit; The plug body face of plugging together is provided with fiber orientation hole (39), butt hole (31), register pin (38), register pin pilot hole (30) and end-face seal ring (3), and the fibre-optical splice assembly is housed in the pilot hole, and optical fiber ceramic joint (34) is housed in the butt hole; Lock sleeve interface cylinder both sides respectively are provided with a locking pin (29), respectively are provided with a locking hole (2) and a locking slot (33) on the locking pin (1) that stretch out both sides in addition;

Described stiff end connector comprises that lock sleeve interface inner chamber is equipped with plug body, the connection of plug body afterbody places the length of lock sleeve inner chamber to protect the line tube, long protecting is with copper washer, a stage clip on the line tube, spring piece together tight cap and end to end cover piece together tight cap and be tightened in the long line tube afterbody that protects successively, the tight cap tail end of cover assembly is with water-proof rubber sleeve end to end, and length is protected the line tube inner chamber and is provided with the optical cable fixation kit; The plug body face of plugging together is provided with fiber orientation hole, butt hole, register pin, register pin pilot hole and end-face seal ring, and the fibre-optical splice assembly is housed in the pilot hole, and the optical fiber ceramic joint is housed in the butt hole; Lock sleeve interface cylinder both sides respectively are provided with a locking pin, respectively are provided with a locking hole and a locking slot on the locking pin that stretch out both sides in addition; The lock sleeve cylinder is provided with mounting flange and flange seal circle, the weak point that lock sleeve inner chamber plug body afterbody connects protects and is provided with a bowl-type block-regulations in the line tube cylindrical shell and draws the optical cable locking body, and locking body is provided with many anti-rotation shrinkage pools and is mated condition with the short stopping screw that protects line tube tail end;

Fibre-optical splice assembly on the pilot hole of described free connector (39) is the state of plugging together with butt hole on free connector that docks or the stiff end connector, register pin (38) is the state of plugging together with the pilot hole that docks, and two locking pins (29) are fastening state with locking hole on the locking pin that docks;

Described optical cable fixation kit comprises line ball body (22), retaining ring (21), pieces together tight cover (20), line ball scapus face is provided with many optical cable skeletons (23) by retaining ring and the tight cover locking of assembly, piece together tightly to put being provided with many anti-rotation shrinkage pools (16), be mated condition with the long stopping screw (15) that protects line tube tail end;

Described plug body tail end protects line tube junction with length and is provided with two stopping screws (7), and the plug body cylinder is provided with O-ring seal (6) and locating slot (8), and locating slot and the protruding key of lock sleeve inwall (9) are the location mated condition.

2, a kind of environment-resistance optical fiber connector according to claim 1, it is characterized in that: the fibre-optical splice assembly in the described pilot hole comprises that optical fiber ceramic joint (35) is fixed in the locating sleeve (36), be with inner sheath (32) and oversheath (37) on the locating sleeve, oversheath is tightened on the pilot hole (39).

3, a kind of environment-resistance optical fiber connector according to claim 1 is characterized in that: be with stage clip (28) and compression spring sleeve (27) on described optical fiber ceramic joint (34) (35) tailstock, and spacing by the cover plate that lock onto the plug body tail end (26).

4, a kind of environment-resistance optical fiber connector according to claim 1 is characterized in that: described spring is pieced together tight cap (14) and is provided with 2-5 O-ring seal (13).

5, a kind of environment-resistance optical fiber connector according to claim 1 is characterized in that: described free connector or stiff end connector tail end connect the wire spring that protects that is placed on the optical cable.

6, a kind of environment-resistance optical fiber connector according to claim 1 is characterized in that: the lock sleeve of described free end and stiff end connector adopts aluminium alloy or aldary or stainless steel material.

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