CN110927889B

CN110927889B - Optical fiber plug connector and assembly in one-time butt joint

Info

Publication number: CN110927889B
Application number: CN201911025724.0A
Authority: CN
Inventors: 杨帅杰; 刘乃常; 王旭涛; 韩云钊; 姚文浩
Original assignee: China Aviation Optical Electrical Technology Co Ltd
Current assignee: China Aviation Optical Electrical Technology Co Ltd
Priority date: 2019-10-25
Filing date: 2019-10-25
Publication date: 2022-01-25
Anticipated expiration: 2039-10-25
Also published as: CN110927889A

Abstract

The invention relates to an optical fiber plug connector in one-time butt joint, which comprises an optical contact part and a butt-joint shell part, wherein the optical contact part comprises an LC plug of which the tail part is fixed in a duplex shell base; an elastic piece for providing force for the locking sheet to be separated from the duplex shell base backwards is arranged between the locking sheet fixed at the front end of the supporting sleeve and the duplex shell base in a pressing mode; the supporting sleeve is provided with an anti-drop part which is matched with the rear end of the duplex shell base to prevent the duplex shell base from separating backwards. The optical contact component of the connector comprises the optical fiber contact element and the elastic element, so that the optical fiber can float in a certain range in the axial direction to be adapted to optical fiber equipment of different models, the elastic force requirement of pin butting is met, the fixing element limits the positions of the optical contact component and the shell element, and the optical contact component is butted with an optical fiber equipment interface while the shell element is plugged, so that one-time installation is realized.

Description

Optical fiber plug connector and assembly in one-time butt joint

Technical Field

The invention relates to the technical field of connectors, in particular to an optical fiber plug connector and an optical fiber plug assembly capable of being butted at one time.

Background

The optical fiber communication technology is developing towards the direction of high transmission rate and high bandwidth, the optical fiber connection technology develops along with the development of the optical fiber communication technology, and the optical fiber connection technology is developed into a series of optical fiber connector products with various varieties, complete types and various structures at present, and becomes one of the most widely applied basic optical passive devices in the optical fiber application field. Due to the development of technology, miniaturization of optical fiber connectors, simple installation steps and adaptability to different types of optical modules become the development trend of optical fiber connectors.

The existing optical fiber connectors are generally divided into two types. The first is a form that the socket is provided with an adapter, the optical fiber plug connector and the socket which are butted at one time are plugged, and then the optical fiber equipment interface and the adapter are connected by a jumper wire.

The second is to insert the optical fiber core into the optical fiber device interface, and then push the housing component to be butted with the socket, but in this connection mode, although the optical fiber plug can be directly butted with the optical fiber device interface, the core needs to be installed first, and then the housing needs to be pushed, two operations are needed, and the operation steps are complicated.

Disclosure of Invention

In order to solve the problems, the invention provides the optical fiber plug connector which is in one-time butt joint, so that the optical fiber plug connector can be installed at one time, the optical fiber plug is directly connected with an optical fiber equipment interface, and meanwhile, the optical fiber in the inner core of the plug can float, and the optical fiber plug connector can be adapted to optical fiber equipment of different models within a certain range.

The purpose of the invention and the technical problem to be solved are realized by adopting the following technical scheme. The optical fiber plug connector capable of being butted at one time comprises an optical contact part and a butting shell part, wherein the optical contact part comprises an LC plug of which the tail part is fixed in a duplex shell base; an elastic piece for providing force for the locking sheet to be separated from the duplex shell base backwards is arranged between the locking sheet fixed at the front end of the supporting sleeve and the duplex shell base in a pressing mode; the supporting sleeve is provided with an anti-drop part which is matched with the rear end of the duplex shell base to prevent the duplex shell base from separating backwards.

The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.

In the optical fiber plug connector with one-time butting, the butting shell part comprises a sleeve and a connecting nut, the optical contact part is assembled in the sleeve, and a fixing part for realizing the fixation between the sleeve and the supporting sleeve is further arranged in the sleeve.

In the optical fiber plug connector subjected to one-time butt joint, the fixing piece is sleeved on the support sleeve, the front end of the fixing piece is provided with a fixing groove for accommodating the flange plate on the support sleeve, and the front end of the fixing groove is also provided with an elastic clamping claw for clamping the front end surface of the flange plate to prevent the flange plate from being separated.

In the optical fiber plug connector in one-time butt joint, the fixing groove is surrounded by the elastic claw with the hook at the front end.

In the optical fiber plug connector subjected to one-time butt joint, the rear end face of the fixing piece is stopped on the step face in the sleeve, and the rear end face of the fixing piece extends out of the elastic claw which is used for being in clamping fit with the backward step face on the rear side of the sleeve.

In the optical fiber plug connector in one butt joint, one or more anti-rotation convex keys matched with the key slots in the sleeve are further arranged on the outer peripheral surface of the fixing piece.

In the optical fiber plug connector in one-time butt joint, the duplex housing base is open at the upper part, and the duplex housing cover plate is buckled on the duplex housing base and flattens the locking wings of the LC plug.

In the optical fiber plug connector in one-time butt joint, the LC plug and the duplex housing base are fixed in position by the clamping groove.

In the optical fiber plug connector in one butt joint, the anti-falling part on the outer side of the support sleeve is a barb which is matched with the inverted edge at the rear end of the duplex shell base for limiting.

The purpose of the invention and the technical problem to be solved are realized by adopting the following technical scheme. According to the invention, the optical fiber connector assembly comprises a plug and a socket, wherein the plug is the plug connector.

Compared with the prior art, the invention has obvious advantages and beneficial effects. By means of the technical scheme, the invention can achieve considerable technical progress and practicability, has wide industrial utilization value and at least has the following advantages:

the optical contact component of the connector comprises an optical fiber contact element and an elastic element, so that the optical fiber can float in a certain range in the axial direction to be adapted to optical fiber equipment of different models, and the elastic force requirement of pin butting is met; the fixing piece carries out position limitation on the optical contact component and the shell piece through the elastic claw structure, the optical contact component is butted with an optical fiber equipment interface while the shell piece is inserted, one-time installation is realized, and the optical contact component is prevented from rotating through the matching of a key of the fixing piece and a key groove of the shell piece.

The invention simplifies the installation of the secondary steps and makes the operation more convenient; the floating of the optical contact component avoids the situation that the optical fiber is excessively bent, even broken or the optical fiber is in poor contact with the optical fiber contact member when the optical fiber connector is adapted to different modules, and the normal transmission of signals is influenced.

Drawings

FIG. 1 is a schematic structural diagram of a single-splice fiber optic plug connector according to the present invention;

FIG. 2 is a front view of the optical contact component of the single-fiber plug connector of the present invention;

FIG. 3 is a top view of the optical contact component of the fiber optic plug connector of the present invention in one mating arrangement;

fig. 4 is an overall schematic view of the optical contact component of the optical fiber plug connector of the present invention.

[ description of main element symbols ]

1: LC plug

101: clamping groove

2: duplex casing base

3: duplex shell cover plate

4: elastic piece

5: locking sheet

6: support sleeve

61: barb

7: connecting nut

8: spring

9: sleeve barrel

10: fixing piece

11: crimping sleeve

12: rubber ring

13: nut

14: protective sleeve

15: optical cable

16: check ring

17: convex key

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description will be made on the specific implementation, structure, features and effects of the optical fiber plug connector according to the present invention with reference to the accompanying drawings and preferred embodiments.

Please refer to fig. 1-4, which are schematic structural diagrams of parts of an optical fiber plug connector for one-time docking according to the present invention, the plug connector includes an optical contact component and a docking housing component, wherein the optical contact component includes an LC plug 1, a tail of the LC plug 1 is fixed in a duplex housing base 2 provided with a duplex housing cover plate 3, and a locking wing of the LC plug is pressed flat by the duplex housing cover plate to prevent unlocking from being limited by an interface of an optical fiber device. In the embodiment of the invention, the LC plug 1 and the duplex shell base are fixed by the clamping groove, the clamping grooves 101 are arranged on the front side and the rear side of the tail part of the LC plug 1, the inner side of the duplex shell base is provided with a bulge corresponding to the clamping groove 101, when the tail part of the LC plug 1 enters the duplex shell base, the bulge is positioned in the clamping groove to realize axial limit between the LC plug and the duplex shell base, and the duplex shell cover plate 3 covers the duplex shell base to realize vertical limit between the LC plug and the duplex shell base.

The duplex shell base 2 is internally provided with a locking sheet 5 and a supporting sleeve 6 along the length sliding direction, an elastic part 4 for maintaining the trend that the locking sheet 5 is separated from the duplex shell base 2 backwards is arranged between the front end of the locking sheet 5 and the duplex shell base 2, and the rear end of the locking sheet 5 is fixedly connected with the supporting sleeve 6.

In the embodiment of the present invention, the elastic member 4 is a spring, but is not limited thereto. Support 6 outsides and be equipped with barb 61, realize spacingly through the cooperation on this barb 61 and the duplex casing base 2 rear end enstrophe edge, make support 6 only can the axial move forward for duplex casing base 2 and prevent that it breaks away from duplex casing base 2. The support sleeve and the duplex shell base limit positions in a single direction, relative movement in the other direction can be realized, and bending of the optical fiber in the duplex shell base is realized.

The core of the optical cable 15 passes through the support sleeve 6 and enters the duplex housing base 2 to be assembled with the rear end of the LC plug 1, and the crimping sleeve 11 is sleeved on the tail of the support sleeve 6 and the outer skin of the cable 15 to realize the connection of the support sleeve 6 and the cable 15.

When the LC plug 1 is in butt joint with the interface of the optical fiber equipment, axial thrust can be generated on the LC plug 1, then the LC plug 1 and the duplex shell base 2 compress the elastic part 4, the duplex shell base 1 and the duplex shell base 2 move backwards in the axial direction relative to the locking sheet 5 and the supporting sleeve 6, so that the optical fiber can be bent in the duplex shell base 2, and the phenomenon that the elastic force of an optical fiber contact pin is overlarge and even the optical fiber is broken due to different interface positions of the optical fiber equipment and different axial displacements generated on the LC plug 1 is avoided.

The plug shell component comprises a sleeve 9, a connecting nut 7 is sleeved outside the sleeve 9, a bulge is arranged on the inner circumferential surface of the connecting nut 7, a spring 8 is pressed between the bulge and a boss on the outer circumferential surface of the sleeve 9, and a check ring 16 assembled in an annular groove on the outer circumferential surface of the sleeve 9 is blocked at the front end of the bulge. In the embodiment of the invention, the front end of the inner projection of the coupling nut is provided with a groove matching the collar 16, so that the lower end of the collar 16 is located in the annular groove on the sleeve 9 and the upper end is located in the groove on the inner projection of the coupling nut, but this is not the case.

In order to realize one-time butt joint, the duplex shell base 2 of the optical contact component is assembled in a sleeve 9, the duplex shell base is fixed with the sleeve 9 through the connection of a supporting sleeve 6 and a fixing piece 10 fixed in the sleeve 9, when a connector is inserted, the sleeve 9 is inserted into a socket, a locking piece on the socket is matched with the sleeve 9 and a connecting nut 8, the butt joint and locking of a plug connector and the socket are realized, meanwhile, because the fixing piece 10 fixes the optical contact component on the sleeve 9, an LC plug 1 is simultaneously in butt joint with an optical fiber equipment interface in the socket, and the conduction of an optical path is realized.

In the embodiment of the invention, a flange is arranged on the periphery of the rear end of the support sleeve 6, a fixing groove for accommodating the flange is arranged at the front end of a fixing part 10 sleeved on the support sleeve 6, and an elastic claw for clamping the front end surface of the flange to prevent the flange from separating from the fixing groove is further arranged at the front end of the fixing groove. In another embodiment of the present invention, the fixing groove is composed of a latch having a hook at a front end thereof, but is not limited thereto.

The rear end face of the fixing member 10 is stopped on the step face in the sleeve 9 to prevent the fixing member from moving backward relative to the sleeve 9, and the elastic claw extending from the rear end face of the fixing member is clamped on the backward step face on the rear side of the sleeve 9 to prevent the fixing member from moving forward relative to the sleeve 9.

One or more convex keys 17 are also arranged on the outer peripheral surface of the fixing piece 10, and the convex keys are matched with the key grooves in the sleeve 9 to realize the rotation prevention between the two.

The cable 15 is sealed with the sleeve 9 by a rubber ring 12, and a sheath 14 for protecting the cable is further provided at the tail of the sleeve 9, and in the embodiment of the present invention, the sheath 14 is fixed on the sleeve by a nut 13, but the present invention is not limited thereto.

The optical fiber connector is provided with the fixing piece which can fix the optical contact component and the protection and insertion shell piece, when the optical contact component is in butt joint with the socket, the optical contact component is in butt joint with the optical fiber equipment interface firstly, and then the shell piece is in butt joint with the socket, so that one-time installation is realized. When the optical contact piece is in butt joint with the optical fiber equipment interface, the elastic force of the optical contact piece can be provided through the spring, so that the optical contact piece is in tight butt joint with the optical fiber equipment interface, meanwhile, the optical contact piece can float, the phenomenon that the insertion loss is too large due to the fact that the optical fiber cannot move, even the optical fiber is broken, and the optical contact piece can be matched with the optical fiber equipment interfaces at different positions.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A fiber optic plug connector for one-time mating, comprising an optical contact component and a mating housing component, characterized in that: the optical contact component comprises an LC plug with the tail part fixed in a duplex shell base, and a support sleeve for the optical cable core to penetrate into and be assembled with the LC plug is assembled in the duplex shell base in a sliding mode along the length direction; an elastic piece for providing force for the locking sheet to be separated from the duplex shell base backwards is arranged between the locking sheet fixed at the front end of the supporting sleeve and the duplex shell base in a pressing mode; the supporting sleeve is provided with an anti-drop part which is matched with the rear end of the duplex shell base to prevent the duplex shell base from separating backwards;

the optical contact component is assembled in the sleeve and fixedly connected with the sleeve through the connection of the tail supporting sleeve and the fixing piece in the sleeve, so that the optical contact component and the opposite insertion shell component are synchronously butted when the optical fiber plug connector is plugged.

2. The one-time-mated optical fiber plug connector of claim 1, wherein: the fixing part is sleeved on the supporting sleeve, a fixing groove used for accommodating the flange plate on the supporting sleeve is arranged at the front end of the fixing part, and an elastic clamping claw used for clamping the front end face of the flange plate to prevent the flange plate from being separated from the fixing groove is further arranged at the front end of the fixing groove.

3. The one-time-mated optical fiber plug connector of claim 2, wherein: wherein the fixed groove is surrounded by the elastic claw with a hook at the front end.

4. The fiber optic plug connector of one-time mating of claims 2 or 3, wherein: the rear end face of the fixing piece is blocked on a step face in the sleeve, and an elastic claw which is used for being in clamping fit with the backward step face on the rear side of the sleeve extends out of the rear end face of the fixing piece.

5. The one-time-mated optical fiber plug connector of claim 4, wherein: one or more convex keys matched with the key grooves in the sleeve for preventing rotation are further arranged on the outer peripheral surface of the fixing piece.

6. The one-time-mated optical fiber plug connector of claim 1, wherein: the upper part of the duplex shell base is open, and the duplex shell cover plate is buckled on the duplex shell base and flattens the locking wings of the LC plug.

7. The one-time-mated optical fiber plug connector of claim 6, wherein: and the LC plug and the duplex shell base are fixed in position through the clamping groove.

8. The one-time-mated optical fiber plug connector of claim 1, wherein: the anti-falling part outside the supporting sleeve is an agnail matched with the inverted edge at the rear end of the duplex shell base for limiting.

9. A single mating fiber optic connector assembly comprising a plug and a receptacle, characterized in that: wherein the plug is a plug connector according to any one of claims 1 to 3.