CN218547056U

CN218547056U - Beam expanding contact piece and beam expanding type optical fiber connector

Info

Publication number: CN218547056U
Application number: CN202222771145.4U
Authority: CN
Inventors: 王猛; 杨晓楠; 董伟强; 闫永杰; 赵俊霞; 董玉刚; 李卫可
Original assignee: China Aviation Optical Electrical Technology Co Ltd
Current assignee: China Aviation Optical Electrical Technology Co Ltd
Priority date: 2022-10-20
Filing date: 2022-10-20
Publication date: 2023-02-28
Anticipated expiration: 2032-10-20

Abstract

The utility model relates to a contact and expand beam type fiber connector expand the beam contact, wherein expand the beam contact and include fiber optic inserting needle (2), sleeve pipe (3) and self-focusing lens (4), self-focusing lens (4) insert from the front end of sleeve pipe (3), and fiber optic inserting needle (2) insert from the rear end of sleeve pipe (3), fiber optic inserting needle's preceding terminal surface (21) and self-focusing lens's rear end face (41) interval setting in the front rear direction, and the focus of self-focusing lens (4) is located fiber optic inserting needle's preceding terminal surface (21). Borrow by above-mentioned technical scheme, the utility model discloses make optic fibre contact pin and self-focusing lens set up for axial interval, form the physics space between the two, avoided self-focusing lens to be met the terminal surface easily by optic fibre contact pin and the terminal surface damage problem that causes.

Description

Beam expanding contact piece and beam expanding type optical fiber connector

Technical Field

The utility model belongs to the technical field of the connector contact, concretely relates to contact and expand beam type fiber connector expand the beam.

Background

The beam expanding type optical fiber connector is a novel optical fiber connector, and is different from the traditional terminating type optical fiber connector in that a contact part of the optical fiber connector combines the beam expanding and focusing effects of a lens to realize the non-contact transmission of optical signals. The beam expanding type optical fiber connector becomes the first choice in a harsh environment due to the characteristics of good beam expanding performance and non-contact type connection, the non-contact type structural design ensures that the signal transmission still has high reliability in the harsh environment, the signal is transmitted after beam expanding collimation, the insensitivity to short-distance change can be realized, and the characteristic ensures that the signal transmission is not interrupted in severe vibration and impact environments. In addition, the optical signal can realize that the light beam expands dozens to hundreds of times through the beam expanding type optical fiber connector, and the transmission influence of fine pollutants on the signal is greatly reduced. The existing common beam expanding type optical fiber connector realizes the beam expanding function by packaging a collimator or a contact element with a ball lens in a connector hole cavity, but the collimator is limited by the packaging mode and materials of the collimator, is difficult to realize the dismounting and repairing and is not beneficial to the environment of the on-site dismounting and repairing; the latter is limited by the processing precision of parts at present due to the limitation of the requirement of the ball lens on the focal length and higher requirement on the processing precision, and the transmission with stable optical performance and low loss cannot be ensured.

In the contact element of the existing beam expanding type optical fiber connector, as shown in fig. 1, the self-focusing lens 01 is adhered to one end of a ceramic sleeve 02, and then an optical fiber pin 03 is inserted from the other end of the ceramic sleeve 02, and the beam expanding transmission can be realized by using a 0.25P self-focusing lens and contacting the optical fiber pin 03 with the end surface of the self-focusing lens 01. The prior art has the following defects: 1. the optical fiber contact pin is attached to the surface of the self-focusing lens, so that the self-focusing lens is easy to crack; 2. the self-focusing lens has no limit structure, and the assembly position in the ceramic sleeve is not easy to control; 3. the plugging life of the ceramic bushing is limited.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a expand beam contact and adopt this expand beam contact expand beam type fiber connector to solve the self-focusing lens terminal surface damage problem that leads to when the touching self-focusing lens of optic fibre contact pin.

The purpose of the utility model and the technical problem thereof are realized by adopting the following technical scheme. The foundation the utility model provides a beam expanding contact to its grafting end is the front end, including optic fibre contact pin, sleeve pipe and self-focusing lens, self-focusing lens inserts from the sheathed tube front end, and optic fibre contact pin inserts from the sheathed tube rear end, optic fibre contact pin's preceding terminal surface sets up with the rear end face of self-focusing lens interval in the front and back direction, and the focus of self-focusing lens is located optic fibre contact pin's preceding terminal surface.

Furthermore, the sleeve pipe adopts metal sleeve pipe to increase the plug durability, satisfy the plug of ten thousand times.

Furthermore, the self-focusing lens adopts a 0.23P self-focusing lens, so that the focus of the self-focusing lens is ensured to be outside the lens, and the optical fiber contact pin is not required to be attached to the rear end face of the self-focusing lens when being installed.

Furthermore, the inner wall of the front end of the sleeve is provided with a step, and the step is used for positioning the installation position of the self-focusing lens.

Furthermore, the rear end of the sleeve is provided with a large-diameter section which is convenient for the insertion of the optical fiber contact pin, the front end of the large-diameter end is a small-diameter section, and the small-diameter section is used for being matched with the optical fiber contact pin so that the optical fiber contact pin is positioned in the sleeve in the middle and the optical fiber in the optical fiber contact pin and the focus of the self-focusing lens are ensured to be on the same straight line.

Furthermore, the joint of the small-diameter section and the large-diameter section adopts inclined plane transition, which is beneficial to the insertion of the optical fiber contact pin.

Furthermore, the small-diameter section and the optical fiber inserting needle are in forced fit.

Furthermore, the rear end of the optical fiber contact pin is arranged in an inner hole of the flange plate; the rear end of the sleeve is coaxially sleeved in the inner hole of the flange plate, or the rear end of the sleeve is coaxially sleeved outside the inner hole of the flange plate; the inner hole of the flange plate is in sealing fit with the rear end of the sleeve so as to seal the optical fiber insertion pin.

Furthermore, the rear end face of the self-focusing lens and the front end face of the optical fiber contact pin are parallel to each other and extend along a radial plane vertical to the front-back direction; or the rear end face of the self-focusing lens and the front end face of the optical fiber contact pin are parallel to each other and extend along an inclined plane, and the included angle between the inclined plane and the radial plane is 8 degrees.

The beam expanding type optical fiber connector comprises a connector shell and a beam expanding contact piece arranged in the connector shell, wherein the beam expanding contact piece is any one of the beam expanding contact pieces.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses make optic fibre contact pin and self-focusing lens be the interval setting, form the physics space between the two, avoided self-focusing lens to be met the terminal surface by optic fibre contact pin easily, appear the problem of damage terminal surface.

2. The utility model discloses set up the step that is used for fixing a position the self-focusing lens position in the sleeve pipe, solved the difficult technical problem who confirms of self-focusing lens position.

3. The utility model discloses a sleeve pipe adopts metal sleeve, can increase the plug durability of expanding beam contact spare, satisfies the plug of last ten thousand times.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention can be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are specifically illustrated below, and the detailed description is given in conjunction with the accompanying drawings.

Drawings

Fig. 1 is a schematic diagram of a contact structure of a conventional expanded beam fiber connector.

Fig. 2 is a schematic structural view of the beam expanding contact element of the present invention.

Fig. 3 is a schematic view of a step on the metal sleeve of the present invention.

Fig. 4 is a schematic view of the structure of the sleeve according to the present invention.

Fig. 5 is a schematic diagram of a beam expanding contact according to another embodiment of the present invention.

Fig. 6 is an enlarged view of a portion I in fig. 5.

Description of the reference numerals:

1-a flange plate; 11-inner bore;

2-optical fiber inserting needle; 21-front end face;

3-sleeving a pipe; 31-step; 32-a large diameter section; 33-small diameter section; 34-a bevel;

4-a self-focusing lens; 41-rear end face;

5-physical voids.

Detailed Description

The following detailed description is to be read in connection with the drawings and the preferred embodiments.

An embodiment of an expanded beam contact:

as shown in fig. 2 to 4, a beam expanding contact element uses its plugging end as a front end, and includes a flange plate 1, an optical fiber ferrule 2, a sleeve 3, and a self-focusing lens 4, in this embodiment, the sleeve 3 is a metal sleeve, so as to improve the plugging durability of the beam expanding contact element, and meet the requirement of plugging ten thousand times. The self-focusing lens 4 is arranged in the front end of the sleeve 3, and the self-focusing lens is inserted into the front end of the sleeve from front to back in the installation direction; the optical fiber inserting needle 2 is inserted from the rear end of the sleeve 3, the self-focusing lens 4 adopts a 0.23P self-focusing lens, the focus of the self-focusing lens 4 can be ensured to be behind the lens, so that the optical fiber inserting needle 2 is not required to be attached to the rear end face 41 of the self-focusing lens when being installed in the sleeve 3, the front end face 21 of the optical fiber inserting needle 2 and the rear end face 41 of the self-focusing lens 4 are arranged at intervals in the front-rear direction, namely, a physical gap 5 is formed between the two, and the problem of end face damage caused by the fact that the optical fiber inserting needle touches the self-focusing lens 4 is avoided. After the optical fiber pin 2 and the self-focusing lens 4 are installed in place, the focus of the self-focusing lens 4 is located on the front end face of the optical fiber pin 2, so that the optical fiber in the optical fiber pin can be coupled with the self-focusing lens.

The inner wall of the front end of the sleeve 3 is provided with a step 31, the step 31 is used for positioning the installation position of the self-focusing lens 4, and after the self-focusing lens 4 is bonded with the sleeve, the self-focusing lens and the step are in blocking fit in the backward direction, so that the axial displacement of the self-focusing lens 4 is effectively prevented, and the vibration environment can be adapted.

The rear end of the sleeve 3 is provided with a large-diameter section 32 convenient for inserting the optical fiber inserting needle, the front end of the large-diameter section 32 is a small-diameter section 33, and the joint of the small-diameter section 33 and the large-diameter section 32 adopts an inclined surface 34 for transition, so that the insertion of the optical fiber inserting needle is guided. The small-diameter section 33 is used for being matched with the optical fiber inserting needle 2, so that the optical fiber inserting needle can be centered and positioned in the sleeve 3, and further, the optical fiber in the optical fiber inserting needle 2 and the focus of the self-focusing lens 4 are on the same straight line; the small diameter section 33 and the optical fiber stub 2 can be positioned relative to each other by a strong fit.

The rear end of the optical fiber pin 2 is arranged in an inner hole 11 of the flange plate 1, the inner hole 11 is a step hole, and the flange plate 1 is used for integrally positioning the beam expanding contact piece in the beam expanding type optical fiber connector. The rear end of the sleeve 3 can be arranged in the inner hole 11 of the flange plate, or can be arranged outside the inner hole 11 of the flange plate and wrap the peripheral surface of the flange plate. However, no matter the rear end of the sleeve is positioned in the inner hole of the flange plate or outside the inner hole, the flange plate and the rear end of the sleeve form a coaxially sleeved contact relation, so that the direct action of force on the optical fiber contact pin caused by radial stress of the beam expanding contact element is avoided; in addition, the inner hole of the flange plate can also play a role in sealing the optical fiber contact pin after being matched with the rear end of the sleeve.

The rear end face 41 of the self-focusing lens and the front end face 21 of the optical fiber stub are parallel to each other, and in this embodiment, as shown in fig. 2 and 6, both the rear end face 41 of the self-focusing lens and the front end face 21 of the optical fiber stub extend along a radial plane a perpendicular to the front-rear direction (axial direction); in another embodiment, as shown in fig. 5 and 6, the rear end face 41 of the self-focusing lens and the front end face 21 of the optical fiber stub are parallel to each other and both extend along an inclined plane B, which forms an angle of 8 ° with the radial plane a, because the optical fiber stub has the front end face 21 inclined by 8 ° in the prior art, and the return loss can be increased when the inclination angles of the front end face 21 and the rear end face 41 are inclined by 8 °.

Embodiment of the beam-expanding fiber connector:

the beam expanding type optical fiber connector comprises a connector shell and a beam expanding contact piece arranged in the connector shell, wherein the beam expanding contact piece is the beam expanding contact piece in the embodiment of the beam expanding contact piece, and the details are not repeated here.

The foregoing is only a preferred embodiment of the present invention, and nothing in detail is prior art; any person skilled in the art can make any simple modification, equivalent change and modification to the above embodiments according to the technical spirit of the present invention without departing from the scope of the technical solution of the present invention, and still fall within the scope of the technical solution of the present invention.

Claims

1. The utility model provides a contact piece expands to its grafting end is the front end, including optic fibre contact pin (2), sleeve pipe (3) and self-focusing lens (4), self-focusing lens (4) insert from the front end of sleeve pipe (3), and optic fibre contact pin (2) insert from the rear end of sleeve pipe (3), its characterized in that: the front end face (21) of the optical fiber plug pin and the rear end face (41) of the self-focusing lens are arranged at intervals in the front-rear direction, and the focus of the self-focusing lens (4) is located on the front end face (21) of the optical fiber plug pin.

2. The beam expanding contact of claim 1, wherein: the sleeve (3) is a metal sleeve.

3. The beam expanding contact of claim 1, wherein: the self-focusing lens (4) adopts a 0.23P self-focusing lens.

4. The beam expanding contact of claim 1, wherein: the inner wall of the front end of the sleeve (3) is provided with a step (31), and the step (31) is used for positioning the installation position of the self-focusing lens (4).

5. The beam expanding contact of claim 1, wherein: the rear end of the sleeve (3) is provided with a large-diameter section (32) convenient for inserting the optical fiber inserting needle, the front end of the large-diameter section (32) is a small-diameter section (33), and the small-diameter section (33) is matched with the optical fiber inserting needle (2) so that the optical fiber inserting needle (2) is positioned in the sleeve (3) in the center.

6. The beam expanding contact of claim 5, wherein: the joint of the small-diameter section (33) and the large-diameter section (32) adopts an inclined plane (34) for transition.

7. The beam expanding contact of claim 5, wherein: the small diameter section (33) and the optical fiber insertion pin (2) are in forced fit.

8. The beam expanding contact of claim 1, wherein: the rear end of the optical fiber inserting needle (2) is arranged in an inner hole (11) of the flange plate;

the rear end of the sleeve (3) is coaxially sleeved in the inner hole (11) of the flange plate, or the rear end of the sleeve (3) is coaxially sleeved outside the inner hole (11) of the flange plate; the inner hole (11) of the flange plate is in sealing fit with the rear end of the sleeve (3).

9. The beam expanding contact of claim 1, wherein:

the rear end surface (41) of the self-focusing lens and the front end surface (21) of the optical fiber pin are parallel to each other and extend along a radial plane vertical to the front-back direction;

or the rear end surface (41) of the self-focusing lens and the front end surface (21) of the optical fiber inserting needle are parallel to each other and extend along an inclined plane, and the included angle between the inclined plane and the radial plane is 8 degrees.

10. Expand beam type fiber connector, including connector housing and set up the contact piece that expands in connector housing, its characterized in that: the beam expanded contact is according to any one of claims 1-9.