CN116560009A - Optical fiber transfer contact and assembly method thereof - Google Patents

Abstract

The invention relates to the technical field of optical fiber connectors, and discloses an optical fiber switching contact piece, which comprises: the device comprises a beam expansion type optical fiber contact part and a physical contact type optical fiber contact part, wherein the beam expansion type optical fiber contact part is detachably connected with the physical contact type optical fiber contact part. The optical fiber switching contact piece can be matched with an optical fiber adapter for use, so that the optical fiber connectors with two different structural forms/principles of physical contact type and beam expansion type can be directly connected.

Description

Optical fiber transfer contact and assembly method thereof

technical field

The invention relates to the technical field of optical fiber connectors, in particular to an optical fiber transfer contact and an assembly method thereof.

Background technique

Optical fiber contacts generally have two structural forms/principles, one is the traditional physical contact type, and the other is the expanded beam type. Among them, the expanded beam optical fiber contact piece expands, collimates and converges the beam by setting a lens, so that the diameter of the spot can be increased, and there is no physical contact between the contact pieces, and it has the characteristics of resistance to dirt and vibration and impact. A new type of fiber optic contact.

The function of the fiber optic transition contact is to realize the physical connection of the two connectors on both sides of the contact. Both sides of the existing optical fiber transfer contact are physical contact type or beam expansion type on both sides, and it is impossible to combine two different structural forms/principles of physical contact type and beam expansion type contacts in one transfer contact accomplish.

Therefore, how to provide an optical fiber transition contact that can be directly connected to a physical contact type and an expanded beam type optical fiber connector is an urgent problem to be solved by those skilled in the art.

Contents of the invention

In view of this, the present invention provides an optical fiber transfer contact to solve the problem that the existing physical contact type optical fiber contact and beam expansion type optical fiber contact cannot be realized in one transfer contact.

In order to solve the above technical problems, the present invention adopts the following technical solutions:

An optical fiber transition contact, comprising: an expanded beam optical fiber contact part and a physical contact optical fiber contact part, the expanded beam optical fiber contact part is detachably connected to the physical contact optical fiber contact part.

Preferably, in the above-mentioned optical fiber transition contact, the expanded beam optical fiber contact part includes

a first flange, the first flange is axially provided with a through hole;

a first pin, one end of the first pin is inserted into the through hole, so that the first pin is in interference connection with the first flange;

A lens assembly, where the lens assembly is coaxially and fixedly connected to the first contact pin.

Preferably, in the above optical fiber transition contact, the through hole includes

The first through hole is disposed at one end away from the lens assembly, one end of the first pin is inserted into the first through hole, and the other end is exposed outside the first flange;

A second through hole is disposed near one end of the lens assembly, the second through hole communicates with the first through hole, and the diameter of the second through hole is larger than the diameter of the first through hole.

Preferably, in the above optical fiber transition contact, the lens assembly includes

A sleeve, one end of the sleeve is inserted into the second through hole, and the other end is exposed outside the first flange; the sleeve is provided with a third through hole, and the first pin is exposed in the second through hole. One end of the first flange is inserted into the third through hole, so that the first pin is fixedly connected to the sleeve;

The lens is arranged in the third through hole and connected to the end surface of the first pin, and the axis of the lens is the same as the axis of the first pin.

Preferably, in the above-mentioned optical fiber transition contact piece, anti-reflection coatings are provided on the contact end surfaces of the lens and the first ferrule.

Preferably, in the above optical fiber transition contact, the physical contact optical fiber contact part includes

a second flange, inserted into the first through hole, so that the second flange is connected to the first flange, and the second flange is axially provided with a through hole;

The second pin, one end of the second pin is inserted into the through hole of the second flange, so that the second pin is in interference connection with the second flange.

Preferably, in the above optical fiber transition contact, the through hole of the second flange includes

The fourth through hole is arranged at one end away from the beam expanding optical fiber contact part, one end of the second pin is inserted into the fourth through hole, and the other end is exposed outside the second flange;

The fifth through hole is arranged at one end close to the beam-expanding optical fiber contact part, the fifth through hole communicates with the fourth through hole, and the diameter of the fifth through hole is smaller than the diameter of the fourth through hole .

Preferably, in the above optical fiber transition contact piece, epoxy glue is injected into the fifth through hole;

In the first through hole, a cavity is formed between the first pin and the second flange, and epoxy glue is injected into the cavity.

Preferably, in the above optical fiber transition contact, the first flange is connected to the second flange through a fixing assembly.

In addition, the present invention also discloses an assembly method for the above-mentioned optical fiber transition contact, including the following steps:

(1) Fit the first pin and the first flange together through tooling interference, and reserve the length of the first pin exposed to the first flange, and then insert the first pin in the first channel of the first flange The hole is filled with epoxy glue, for later use;

(2) Assemble the second pin and the second flange together through tooling interference, and reserve the length of the second pin exposed to the second flange, and then place the second pin on the fifth channel of the second flange The hole is filled with epoxy glue, for later use;

(3) Fix the first flange and the second flange together through the fixing assembly, insert the optical fiber into the center axis of the transfer contact along the axial centerline, and insert the first pin after the epoxy glue is cured Polishing and grinding the end face of the second pin;

(4) Coating the end face of the first contact pin after polishing and grinding and the end face of the lens in contact with the first contact pin with anti-reflection coating, then insert the first contact pin into one end of the bushing, and insert the lens into the other end of the bushing, so that the lens and The focal points of the first pins correspond to each other, and then the sleeve is fixed in the second through hole to obtain an optical fiber transfer contact.

The present invention provides an optical fiber transfer contact, compared with the prior art, its beneficial effect lies in:

The optical fiber transfer contact of the present invention can be used in conjunction with the optical fiber adapter, so that two optical fiber connectors of different structural forms/principles, the physical contact type and the beam expanding type, can be directly connected.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

FIG. 1 is a schematic diagram of the overall structure of an optical fiber transfer contact according to an embodiment of the present invention;

Fig. 2 is a schematic structural view of the expanded-beam optical fiber contact part of the embodiment of the present invention;

Fig. 3 is a schematic diagram of a part of the structure of an expanded-beam optical fiber contact part according to an embodiment of the present invention;

Fig. 4 is a schematic diagram of a part of the structure of an expanded-beam optical fiber contact part according to an embodiment of the present invention;

Fig. 5 is a schematic structural view of a physical contact optical fiber contact part according to an embodiment of the present invention;

Fig. 6 is a partial structural schematic diagram of a beam-expanding optical fiber contact part according to an embodiment of the present invention.

In the figure, 100-beam expansion type optical fiber contact part, 110-first flange, 111-first through hole, 112-second through hole, 120-first pin, 130-sleeve, 131-the first Three through holes, 140-lens, 200-physical contact optical fiber contact part, 210-second flange, 211-fourth through hole, 212-fifth through hole, 220-second pin, 300-fixed components.

Detailed ways

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

In the description of this application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientations or positional relationships indicated by "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying References to devices or elements must have a particular orientation, be constructed, and operate in a particular orientation and therefore should not be construed as limiting the application.

The terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present application, unless otherwise specified, "plurality" means two or more.

In the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application in specific situations.

Both sides of the existing optical fiber transfer contact are physical contact type or beam expansion type on both sides, and it is impossible to combine two different structural forms/principles of physical contact type and beam expansion type contacts in one transfer contact accomplish.

Based on the above situation, as shown in Figure 1, the present invention provides an optical fiber transfer contact that can be directly connected to a physical contact type and an expanded beam optical fiber connector, including: an expanded beam optical fiber contact part 100 and a physical contact type The optical fiber contact part 200 is detachably connected to the beam expanding type optical fiber contact part 100 and the physical contact type optical fiber contact part 200 .

As shown in FIG. 2 , in some embodiments of the present invention, the expanded beam optical fiber contact part 100 includes a first flange 110 , a first ferrule 120 and a lens assembly;

Wherein the first flange 110 is axially provided with a through hole; one end of the first pin 120 is inserted into the through hole so that the first pin 120 is in interference connection with the first flange 110 , and the other end of the first pin 120 It is exposed outside the first flange 110, and the exposed length can be adjusted according to the actual situation; the lens assembly is coaxially fixedly connected with the first ferrule 120, so that the optical fiber can pass through smoothly.

As shown in FIG. 3, in some embodiments of the present invention, the through holes of the first flange 110 include a first through hole 111 and a second through hole 112;

Wherein the first through hole 111 is arranged at one end away from the lens assembly, one end of the first pin 120 is inserted into the first through hole 111, and the other end is exposed outside the first flange 110, and the outer diameter of the first pin 120 is equal to or slightly The diameter is smaller than the diameter of the first through hole 111 so as to realize the interference connection between the first pin 120 and the first flange 110 through the first through hole 111 .

Further, the second through hole 112 is arranged near one end of the lens assembly, the second through hole 112 is connected with the first through hole 111, and the diameter of the second through hole 112 is larger than the diameter of the first through hole 111, and the lens assembly is fixed on the second through hole 111. Inside the hole 112.

As shown in FIG. 4, in some embodiments of the present invention, the lens assembly includes a sleeve 130 and a lens 140;

Wherein, one end of the sleeve 130 is inserted into the second through hole 112, and the other end is exposed outside the first flange 110; One end is inserted into the third through hole 131, so that the first pin 120 is fixedly connected with the sleeve 130; that is, the sleeve 130 is in the shape of a hollow cylinder as a whole, and the outer diameter of the first pin 120 is equal to or slightly smaller than the third through hole 131 Diameter, so that the other end of the first pin 120 is disposed in the third through hole 131, and the outer diameter of the sleeve 130 is equal to or slightly smaller than the diameter of the second through hole 112, so that the sleeve 130 is disposed in the second through hole 112 , realizing the fixation of the lens assembly;

Furthermore, the lens 140 is arranged in the third through hole 131 and is connected to the end surface of the first ferrule 120, and the axis of the lens 140 is the same as that of the first ferrule 120 to ensure that the optical fiber passes through smoothly; further, the lens 140 An anti-reflection film is provided on the contact end surface with the first pin 120, which can enhance the light transmittance.

As shown in FIG. 5 , in some embodiments of the present invention, the physical contact optical fiber contact part 200 includes a second flange 210 and a second ferrule 220 ;

Wherein the second flange 210 is inserted into the other end of the first through hole 111, so that the second flange 210 is connected with the first flange 110, and the second flange 210 is axially provided with a through hole; the second One end of the pin 220 is inserted into the through hole of the second flange 210, so that the second pin 220 is connected to the second flange 210 with interference, and the other end is exposed outside the second flange 210, and the exposed length can be determined according to Adjust the actual situation.

As shown in FIG. 6, in some embodiments of the present invention, the through holes of the second flange 210 include a fourth through hole 211 and a fifth through hole 212;

Wherein, the fourth through hole 211 is arranged at the end away from the expanded beam optical fiber contact part 100, the diameter of the fourth through hole 211 is equal to or slightly larger than the outer diameter of the second pin 220, and one end of the second pin 220 is inserted into the fourth through hole. In the hole 211, the other end is exposed outside the second flange 210; the fifth through hole 212 is arranged at one end close to the beam expanding optical fiber contact part 100, the fifth through hole 212 is connected with the fourth through hole 211, and the fifth through hole 212 The diameter of the through hole 212 is smaller than the diameter of the fourth through hole 211 .

In some embodiments of the present invention, epoxy glue is injected into the fifth through hole 212; and in the first through hole 111, a cavity is formed between the first pin 120 and the second flange 210, the cavity The cavity is filled with epoxy glue; the first contact pin 120 and the second contact pin 220 are both ceramic contact pins.

In some embodiments of the present invention, the first flange 110 and the second flange 210 are connected through a fixing assembly 300 . Specifically, the fixing component 300 can be a retaining ring, and the fixing method of the retaining ring can be threaded connection or interference press fit. During the fixing process, curing glue can be applied as required, and the expanded beam optical fiber contact can be realized through the retaining ring. The part 100 and the physical contact fiber optic contact part 200 are nested together.

In some embodiments of the present invention, the length of the first flange 110 is greater than the length of the second flange 210, and the first flange 110 is provided with two protrusions, and the second flange 210 is provided with one Protrusion; It should be noted that the protrusion of the second flange 210 cooperates with one of the protrusions of the first flange 110, and is connected through the fixing assembly 300 to realize the expanded beam optical fiber contact part 100 and the physical The fixing of the contact-type optical fiber contact part 200 ; the other protrusion of the first flange 110 is used to adapt to the change of the diameters of the first through hole 111 and the second through hole 112 .

In other embodiments of the present invention, an assembly method of the above-mentioned optical fiber transition contact is also disclosed, and the assembly of the expanded beam optical fiber contact part 100 and the physical contact optical fiber contact part 200 includes the following steps:

Step S100. Fit the first pin 120 and the first flange 110 together through tooling interference, and reserve the length of the first pin 120 exposed to the first flange 110, and then place the first pin 120 on the first flange The first through hole 111 of 110 is filled with epoxy glue, for standby;

Step S200. Fitting the second pin 220 and the second flange 210 together through tooling interference, and reserve the length of the second pin 220 exposed to the second flange 210, and then place the second pin 220 on the second flange The fifth through hole 212 of 210 is filled with epoxy glue for standby;

Step S300. Set the parts obtained in step S100 and step S200 together, set and fix the first flange 110 and the second flange 210 together through the fixing assembly 300, and pass the optical fiber into the adapter along the axial centerline The central axis of the contact piece, after the epoxy glue is cured, the end faces of the first pin 120 and the second pin 220 are polished and ground;

Step S400. Coating the end face of the polished first pin 120 and the end face of the lens 140 in contact with the first pin 120 with an anti-reflection coating, then inserting the first pin 120 into one end of the bushing 130, and inserting the lens 140 into the bushing At the other end of 130, the focus of the lens 140 and the first ferrule 120 correspond, and then the sleeve 130 is fixed in the second through hole 112 to obtain an optical fiber transfer contact.

It can be understood that the lens 140 and the sleeve 130 can be bonded to the first pin 120 and the first flange 110 by adhesive such as glue, in order to ensure that the lens 140 and the first pin 120 are relatively The position and focus position can be adjusted by the fine-tuning frame and other tooling.

The optical fiber transition contact in the embodiment of the present invention can be used in conjunction with the optical fiber adapter to solve the problem that the physical contact type and the expanded beam type optical fiber connector cannot be directly connected.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, some improvements and replacements can also be made, these improvements and replacements It should also be regarded as the protection scope of the present invention.

Claims (10)

1. An optical fiber transfer contact, comprising: the device comprises a beam expansion type optical fiber contact part and a physical contact type optical fiber contact part, wherein the beam expansion type optical fiber contact part is detachably connected with the physical contact type optical fiber contact part.

2. The fiber optic adapter contact of claim 1, wherein the expanded beam fiber optic contact portion comprises

The first flange plate is axially provided with a through hole;

the first contact pin is inserted into the through hole at one end, so that the first contact pin is in interference connection with the first flange plate;

and the lens assembly is coaxially and fixedly connected with the first contact pin.

3. The fiber optic adapter contact according to claim 2, wherein the through hole comprises

The first through hole is arranged at one end far away from the lens component, one end of the first contact pin is inserted into the first through hole, and the other end of the first contact pin is exposed out of the outer side of the first flange plate;

the second through hole is arranged near one end of the lens component, the second through hole is communicated with the first through hole, and the diameter of the second through hole is larger than that of the first through hole.

4. The fiber optic adapter contact according to claim 2, wherein the lens assembly comprises

One end of the sleeve is inserted into the second through hole, and the other end of the sleeve is exposed out of the first flange; the sleeve is provided with a third through hole, and one end of the first contact pin, which is exposed out of the first flange, is inserted into the third through hole so that the first contact pin is fixedly connected with the sleeve;

the lens is arranged in the third through hole and connected with the end face of the first contact pin, and the axis of the lens is the same as the axis of the first contact pin.

5. The fiber optic adapter contact of claim 4, wherein the contact end surfaces of the lens and the first pin are each provided with an anti-reflection film.

6. The fiber optic adapter contact of claim 3, wherein the physical contact fiber optic contact portion comprises

The second flange plate is inserted into the first through hole so as to be connected with the first flange plate, and the second flange plate is axially provided with a through hole;

and one end of the second contact pin is inserted into the through hole of the second flange plate, so that the second contact pin is in interference connection with the second flange plate.

7. The fiber optic adapter contact according to claim 6, wherein the through-hole of the second flange includes

The fourth through hole is arranged at one end far away from the beam expansion type optical fiber contact part, one end of the second contact pin is inserted into the fourth through hole, and the other end of the second contact pin is exposed out of the second flange plate;

and the fifth through hole is arranged near one end of the beam expansion type optical fiber contact part, the fifth through hole is communicated with the fourth through hole, and the diameter of the fifth through hole is smaller than that of the fourth through hole.

8. The fiber optic adapter contact according to claim 7, wherein the fifth through hole is filled with epoxy glue;

and a cavity is formed between the first contact pin and the second flange plate in the first through hole, and epoxy glue is injected into the cavity.

9. The fiber optic adapter contact according to any of claims 6-8, wherein the first flange is connected to the second flange by a securing assembly.

10. A method of assembling an optical fiber transition contact according to any one of claims 1-9, comprising the steps of:

(1) The first contact pin and the first flange are assembled together through fixture interference, the length of the first contact pin exposed out of the first flange is reserved, and then epoxy glue is filled in a first through hole of the first flange for standby;

(2) The second contact pin and the second flange are assembled together through fixture interference, the length of the second contact pin exposed out of the second flange is reserved, and then epoxy glue is filled in a fifth through hole of the second flange for standby;

(3) The first flange plate and the second flange plate are sleeved and fixed together through the fixing assembly, the optical fiber penetrates into the middle shaft of the transfer contact along the axial center line, and the end faces of the first contact pin and the second contact pin are polished and ground after the epoxy glue is solidified;

(4) Plating an antireflection film on the end face of the first contact pin and the end face of the lens contacted with the first contact pin after polishing and grinding, then inserting the first contact pin into one end of the sleeve and inserting the lens into the other end of the sleeve, enabling the lens to correspond to the focus of the first contact pin, and fixing the sleeve in the second through hole to obtain the optical fiber switching contact piece.