CN115712176A - Optical fiber connector and optical fiber cold connection device - Google Patents

Abstract

The invention provides an optical fiber connector and an optical fiber cold connection device, which comprise an optical fiber lens, an optical fiber container, a pressing plate and a sleeve for pressing the pressing plate and the optical fiber container, wherein one end of the optical fiber lens, which is far away from the optical fiber container, is provided with a lens optical surface, and the pressing plate and the optical fiber container are arranged by penetrating through the sleeve. The optical fiber connector and the optical fiber cold connection device provided by the invention have the advantages that the optical fiber cannot axially move in the optical fiber container, and the reflection and the loss are reduced. And the optical fiber lens is provided with a lens optical surface, the optical path in the optical fiber lens is a relatively long-focus collimation optical path, the optical fiber lens is insensitive to the axial position of the optical fiber, and the optical fiber connection quality is superior to the direct alignment of the traditional cold connection scheme under the condition that the cut end surface of the optical fiber is uneven.

Description

Optical fiber connector and optical fiber cold connection device

Technical Field

The invention belongs to the technical field of optical communication, and particularly relates to an optical fiber connector and an optical fiber cold connection device.

Background

With the wide application of fiber to the home, the usage of fiber access is gradually increased, and the fiber connection method for the fiber access field of the user mainly comprises two methods of welding and cold connection. The cold connection construction is simple, so that the cold connection construction gradually becomes a mainstream optical fiber home-entry optical connection construction scheme.

The optical fiber connector used for cold connection at present comprises an optical fiber container, an optical fiber cover plate, a ceramic contact pin, a spring and the like, wherein the inside of the optical fiber container is filled with refractive index matching liquid, an optical fiber to be connected is inserted into one end of the optical fiber container and is pressed and fixed by the optical fiber cover plate, the ceramic contact pin is inserted into the other end of the optical fiber container, a bare optical fiber in butt joint with the optical fiber to be connected is arranged on the ceramic contact pin, and the spring is used for providing the compression amount of the connector.

Because the bare optical fiber on the ceramic ferrule and the optical fiber to be spliced are directly aligned, the optical fiber to be spliced is required to have higher end face quality. In order to improve the quality of the end face, a professional optical fiber cutter needs to be used for cutting, but along with the abrasion of the cutter, the quality of the end face of the optical fiber is gradually reduced, and the connection quality cannot be guaranteed. A nominal sub-1 dB cold connector is more than 3dB common after field construction. And after the optical fiber to be spliced is inserted and fixed, the spring and the optical fiber to be spliced are driven to move back and forth in the cavity of the optical fiber container along with the insertion of the adapter, so that the distance between the optical fibers is changed, the loss is influenced, and meanwhile, when the distance between the optical fibers is changed, the matching fluid moves along with the optical fiber, and can be separated from the optical fiber alignment plane, so that the reflection and the loss are increased.

Disclosure of Invention

The embodiment of the invention aims to provide an optical fiber connector and an optical fiber cold-jointing device, and aims to solve the technical problems that the quality requirement of the end face of an optical fiber to be jointed is higher, and the optical fiber to be jointed is easy to move, so that the optical fiber jointing quality is poorer, and the reflection and the loss are larger in the prior art when the optical fiber is in cold jointing.

In order to realize the purpose, the invention adopts the technical scheme that: the optical fiber connector comprises an optical fiber lens, an optical fiber container connected with the optical fiber lens, a pressing plate used for pressing an optical fiber in the optical fiber container and a sleeve used for pressing the pressing plate and the optical fiber container, wherein one end, far away from the optical fiber container, of the optical fiber lens is provided with a lens optical surface, and the pressing plate and the optical fiber container are arranged through the sleeve.

Optionally, the optical fiber container has a first receiving groove for receiving the optical fiber and a liquid groove for receiving an index matching fluid, an end of the first receiving groove has a stopping end surface for axially stopping the optical fiber, and the stopping end surface is provided with an opening for communicating the liquid groove with the first receiving groove.

Optionally, one side of the pressing plate, which is far away from the first accommodating groove, is provided with a first guide inclined surface, the interior of the sleeve is provided with a second guide inclined surface for pressing the first guide inclined surface, and the first guide inclined surface and the axial direction of the optical fiber are arranged at an acute angle.

Optionally, one side of the pressing plate, which is used for being away from the optical fiber, is further provided with a first limiting portion, the sleeve is provided with a second limiting portion which is limited by the first limiting portion, and in the axial direction of the optical fiber, the length of the first limiting portion is smaller than that of the second limiting portion.

Optionally, the pressing plate includes a pressing portion for pressing the optical fiber and a cantilever portion connected to the pressing portion by a cantilever, the cantilever portion is spaced from the optical fiber container, the first limiting portion is inserted into the second limiting portion for limiting, in the axial direction of the optical fiber, the length of the first limiting portion is smaller than that of the second limiting portion, the first limiting portion is disposed on the cantilever portion, and a pressing slope is disposed at one end of the first limiting portion, which is far away from the pressing portion.

Optionally, the optical fiber connector further includes an optical fiber introduction portion, the optical fiber lens, the optical fiber container and the optical fiber introduction portion are sequentially connected, the optical fiber introduction portion is provided with an optical fiber introduction hole through which the optical fiber passes, and the optical fiber introduction hole is communicated with the first accommodating groove.

Optionally, the fiber lens and the fiber container are integrally formed; alternatively, the optical fiber lens, the optical fiber container, and the optical fiber introduction part are integrally molded.

Optionally, the optical fiber connector further includes a connector front shell, the end of the optical fiber lens having the lens optical surface extends out of the connector front shell, the optical fiber container, the pressing plate and the sleeve are all disposed in the connector front shell, and an operation hole for exposing at least part of the sleeve is formed in the connector front shell.

Optionally, fiber connector still includes the connector backshell, the connector backshell with the connection can be dismantled to the connector backshell, the connector backshell is kept away from the one end of connector backshell is provided with the loudspeaker external member, the supply of loudspeaker external member optic fibre passes and is used for the joint optic fibre, the loudspeaker end of loudspeaker external member is located the outside of connector backshell, the other end of loudspeaker external member stretch into to the inside of connector backshell.

Optionally, the circumference of the optical lens surface is convexly provided with an annular boss along the axial direction thereof for protecting the lens optical surface.

The invention also provides an optical fiber cold connection device which comprises the optical fiber connector and an adapter flange for connecting the two optical fiber connectors, wherein the optical surfaces of the lenses of the two optical fiber connectors are arranged oppositely.

Optionally, two of the optical lenses are spaced apart.

The optical fiber connector and the optical fiber cold connection device provided by the invention have the beneficial effects that: compared with the prior art, the optical fiber connector comprises the optical fiber lens, the optical fiber container, the pressing plate and the sleeve, the optical fiber is inserted into the optical fiber container, the optical fiber is in butt joint with the optical fiber lens through the refractive index matching fluid, the pressing plate presses the optical fiber in the optical fiber container under the action of the sleeve, and after the pressing plate and the optical fiber container are fixed by the sleeve, the optical fiber cannot axially move in the optical fiber container, so that reflection and loss are reduced. And the optical fiber lens is provided with a lens optical surface, divergent light emitted by the inserted optical fiber can be converted into collimated light for transmission, an optical path inside the optical fiber lens is a relatively long-focus collimated optical path which is insensitive to the axial position of the optical fiber, and the optical fiber connection quality is obviously superior to the direct alignment of the traditional cold connection scheme under the condition that the cut end surface of the optical fiber is uneven.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.

FIG. 1 is a cross-sectional view of an optical fiber connector according to an embodiment of the present invention;

FIG. 2 is an enlarged view of the left end of FIG. 1;

FIG. 3 is an enlarged view of the left end of FIG. 2;

FIG. 4 is a perspective view of a fiber lens, a fiber container and a fiber introduction part according to an embodiment of the present invention;

FIG. 5 is an enlarged view of A in FIG. 4;

FIG. 6 is a perspective view of a platen according to an embodiment of the present invention;

FIG. 7 is a perspective view of a sleeve according to an embodiment of the present invention;

FIG. 8 is an exploded view of a fiber optic connector according to an embodiment of the present invention;

fig. 9 is a perspective structural view of an optical fiber cold junction device provided in an embodiment of the present invention;

fig. 10 is a cross-sectional view of an optical fiber cold-junction device according to an embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

100-an optical fiber;

200-a fiber optic connector; 11-a fiber lens; 111-lens optical surface; 112-an annular boss; 12-a fiber optic container; 120-a containment chamber; 121-a first accommodating groove; 122-a liquid tank; 123-stop end face; 124-a fourth axially positioned end face; 125-positioning groove; 126-a first axially located end face; 127-a guide groove; 13-an optical fiber lead-in part; 131-an optical fiber lead-in hole; 2-pressing a plate; 21-a pressing part; 211-a first guiding ramp; 212-a positioning section; 213-second axial locating end face; 22-a cantilever part; 221-a first limiting part; 222-pressing down the bevel; 3-a sleeve; 31-a second guide ramp; 32-a second limiting part; 33-hand pushing the groove; 4-connector front shell; 41-operation hole; 42-a third axial locating end face; 43-buckling; 5-connector back shell; 51-a horn kit; 52-a clamping hole; 6-an elastic member; 7-optical fiber tail sheath;

300-adapter flange.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The optical fiber connector provided by the embodiment of the invention is explained.

Referring to fig. 1 and 2, the optical fiber connector 200 includes a fiber lens 11, a fiber container 12, a pressing plate 2 and a sleeve 3. The fiber lens 11 is connected to the fiber container 12, and an end of the fiber lens 11 away from the fiber container 12 has a lens optical surface 111, and the fiber container 12 is used for accommodating an optical fiber to be spliced, hereinafter referred to as an optical fiber 100. Specifically, after the optical fiber 100 is inserted into the optical fiber container 12, under the action of the lens optical surface 111, the scattered light emitted by the inserted optical fiber 100 is changed into collimated light for transmission, a light spot collimated by the optical fiber lens 11 is large, the tolerance of the large light spot to the end surface of the optical fiber 100 is far greater than that of the optical fiber 100 in direct alignment, the light path inside the optical fiber lens 11 is a relatively long-focus collimated light path, which is insensitive to the axial position of the optical fiber 100, and the splicing quality of the optical fiber 100 is obviously superior to that of the direct alignment of the conventional cold splicing scheme under the condition that the cut end surface of the optical fiber 100 is uneven (within 50um or 30 °). Therefore, the optical fiber connector 200 of the present invention has low requirement for the cutting precision of the end face of the optical fiber 100, and even if the end face of the optical fiber 100 has an angle, a damage, etc., due to the collimation effect of the optical fiber lens 11, the two optical fiber connectors 200 can still ensure good loss after being butted. For example, when two optical fibers 100 are spliced, one of the optical fibers 100 has an end face with an angle of 5 degrees, the loss of the background technical scheme is compared with that of the present embodiment, the background technical scheme is 12.26%, the present embodiment scheme is 98.48%, and the dB units are-9.12 dB and-0.067 dB, respectively.

The pressing plate 2 is used for pressing the optical fiber 100 in the optical fiber container 12, the sleeve 3 is used for pressing and fixing the pressing plate 2 and the optical fiber container 12, so that the inserted optical fiber 100 can be axially fixed, and the pressing plate 2 and the optical fiber container 12 are both arranged through the sleeve 3. By pressing the pressing plate 2 and the optical fiber container 12 with the sleeve 3, the position of the optical fiber 100 does not move in the axial direction thereof, and therefore, the refractive index matching fluid does not move, and the loss in splicing the optical fiber 100 can be reduced.

The optical fiber connector 200 in the above embodiment includes an optical fiber lens 11, an optical fiber container 12, a pressing plate 2 and a sleeve 3, the optical fiber 100 is inserted into the optical fiber container 12, the optical fiber container 12 is provided with a liquid groove 122 for containing a refractive index matching liquid, so that the optical fiber 100 is butted with the optical fiber lens 11 through the refractive index matching liquid, and under the action of the sleeve 3, the pressing plate 2 presses the optical fiber 100 in the optical fiber container 12, and after the sleeve 3 fixes the pressing plate 2 and the optical fiber container 12, the optical fiber 100 does not move axially in the optical fiber container 12, thereby reducing reflection and loss. Moreover, the fiber lens 11 has a lens optical surface 111, which can change the diverging light emitted by the inserted optical fiber 100 into collimated light for transmission, the optical path inside the fiber lens 11 is a relatively long-focus collimated optical path, which is insensitive to the axial position of the optical fiber 100, and the splicing quality of the optical fiber 100 is obviously better than the direct alignment of the traditional cold-splicing scheme under the condition that the cut end surface of the optical fiber 100 is uneven.

In one embodiment of the present invention, referring to fig. 1 and fig. 2, the fiber container 12 has a first receiving groove 121, and the first receiving groove 121 is used for receiving the optical fiber to be spliced. After the optical fiber 100 is inserted from the tail end of the first accommodation groove 121 to the head end of the first accommodation groove 121, the end of the optical fiber 100 abuts against the stopper end face 123 and contacts the refractive index matching liquid, and the head end of the first accommodation groove 121 is disposed close to the fiber lens 11. The head end of the first accommodating groove 121 has a stopper end face 123, and the stopper end face 123 is used for axially stopping the optical fiber 100, and when the optical fiber 100 is inserted, the optical fiber 100 is stopped and positioned. When defining the end of another member, the end closer to the lens optical surface 111 is the leading end of the member, and the end farther from the lens optical surface 111 is the trailing end of the member. Referring to fig. 3 to 5, the optical fiber container 12 further has a liquid groove 122, the liquid groove 122 is used for containing the refractive index matching liquid, the stop end surface 123 has an opening, and the liquid groove 122 and the first containing groove 121 are communicated through the opening.

In one embodiment of the present invention, referring to fig. 2 and 6, a side of the pressing plate 2 away from the first receiving groove 121 has a first guiding inclined surface 211, an inner wall of the sleeve 3 has a second guiding inclined surface 31, and the first guiding inclined surface 211 and the second guiding inclined surface 31 cooperate with each other to press the pressing plate 2 into the optical fiber container 12. The first guide slope 211 is inclined with respect to the axial direction of the optical fiber 100, that is, the first guide slope 211 is disposed at an acute angle with respect to the axial direction of the optical fiber 100, and the second guide slope 31 is disposed parallel to the first guide slope 211. Specifically, after the optical fiber 100 is inserted into the first receiving groove 121, the ferrule 3 is axially moved, and the second guide slope 31 slides with respect to the first guide slope 211, so that the pressing plate 2 is moved toward the central axis of the optical fiber 100, thereby pressing the optical fiber 100. The inclination angles of the first guide slope 211 and the second guide slope 31 are not limited herein. When the optical fibers 100 are connected, the end face of one of the optical fibers 100 is cut, the end of the optical fiber 100 is inserted into the head end of the first accommodating groove 121 from the tail end of the first accommodating groove 121, the end of the optical fiber 100 abuts against the stop end face 123, and then the sleeve 3 is axially moved to press the optical fiber 100 by the pressing plate 2.

Alternatively, referring to fig. 2, from the tail end to the head end of the first receiving groove 121, the distance between the first guiding inclined surface 211 and the central axis of the optical fiber 100 gradually increases, and the direction of the sleeve 3 locking the pressing plate 2 is the direction from the tail end to the head end of the first receiving groove 121 (in fig. 2, the sleeve 3 moves leftwards to lock the pressing plate 2). Or, the distance between the first guiding inclined surface 211 and the central axis of the optical fiber 100 gradually decreases from the tail end to the head end of the first receiving groove 121, and the direction of the sleeve 3 locking the pressing plate 2 is the direction from the head end to the tail end of the first receiving groove 121.

In one embodiment of the present invention, referring to fig. 4, the optical fiber container 12 has a containing cavity 120, the pressing plate 2 can be disposed inside the containing cavity 120, and the bottom of the containing cavity 120 is opened with the first containing groove 121. The first receiving groove 121 may have a V-shaped or arc-shaped cross section. The end of the first receiving groove 121 away from the liquid groove 122 is further communicated with a guide groove 127, and the guide groove 127 gradually increases from the first receiving groove 121 to the direction away from the first receiving groove 121, so that the guide groove 127 gradually increases, and thus the optical fiber 100 can be easily inserted into the first receiving groove 121 through the guide groove 127.

The stopping end face 123 can be protruded from the inner wall of the accommodating cavity 120, the area of the stopping end face 123 relative to the side wall of the accommodating cavity 120 is small, and only the stopping end face 123 can be finished, so that the stopping end face 123 is smoother.

Optionally, the pressing plate 2 is provided with a second receiving groove facing the optical fiber 100, and a cross section of the second receiving groove may be V-shaped or arc-shaped. The first receiving groove 121 and the second receiving groove together constitute a receiving groove for receiving the optical fiber 100.

In one embodiment of the present invention, referring to fig. 4 and fig. 6, a positioning groove 125 is formed at a head end of the accommodating cavity 120 (disposed adjacent to a head end of the first accommodating groove 121), a positioning portion 212 is convexly disposed at an end portion of the pressing plate 2, and two opposite sides of the positioning groove 125 can limit two opposite sides of the positioning portion 212, so as to limit a left-right position (a width direction of the pressing plate 2) of the pressing plate 2. Two first axial positioning end surfaces 126 are formed at the head end of the accommodating cavity 120 and at two sides of the positioning groove 125, respectively, one end of the pressing plate 2 is correspondingly provided with a second axial positioning end surface 213, and when the pressing plate 2 is fixed, the first axial positioning end surface 126 and the second axial positioning end surface 213 are abutted with each other, so that the pressing plate 2 is axially positioned.

In one embodiment of the present invention, referring to fig. 2, fig. 6 and fig. 7, a first position-limiting portion 221 is disposed on a side of the pressing plate 2 away from the optical fiber 100, a second position-limiting portion 32 is disposed on the sleeve 3, and the first position-limiting portion 221 and the second position-limiting portion 32 are in position-limiting engagement. When the sleeve 3 moves in the reverse direction to release the platen 2, the second stopper 32 moves to abut against the first stopper 221, and the axial position of the sleeve 3 is restricted.

Alternatively, the length of the first stopper portion 221 is smaller than the length of the second stopper portion 32 in the axial direction of the optical fiber 100. When the sleeve 3 axially moves and presses the pressing plate 2, one end of the second limiting part 32 moves to be mutually abutted with one end of the first limiting part 221, so that the pressing plate 2 is axially pressed on the optical fiber container 12; when the sleeve 3 moves in the reverse direction to release the platen 2, the other end of the second stopper portion 32 moves to abut against the other end of the first stopper portion 221, and the axial position of the sleeve 3 is defined.

Optionally, referring to fig. 6 and 7, the first position-limiting portion 221 and the second position-limiting portion 32 are inserted and matched in a position-limiting manner, the first position-limiting portion 221 is a position-limiting protrusion, the second position-limiting portion 32 is a position-limiting groove, and the position-limiting protrusion is inserted into the position-limiting groove. Or the first limiting part is a limiting groove, and the second limiting part is a limiting bulge.

In one embodiment of the present invention, referring to fig. 6, the pressing plate 2 includes a pressing portion 21 and a cantilever portion 22, the pressing portion 21 is used for pressing the optical fiber 100 to the optical fiber container 12, and the second receiving groove is disposed on the pressing portion 21. The cantilever portion 22 is cantilever-connected to the pressing portion 21, a gap is formed between the cantilever portion 22 and the optical fiber container 12, and the first limiting portion 221 is disposed on the cantilever portion 22. One end of the first limiting portion 221, which is far from the pressing portion 21, is provided with a downward pressing slope 222, when the sleeve 3 axially presses the pressing plate 2, the second limiting portion 32 is in contact with the downward pressing slope 222, and has a downward pressing tendency (downward direction in fig. 2) on the cantilever portion 22, when the sleeve 3 moves in the reverse direction, so that the pressing plate 2 is loosened from the optical fiber container 12, under the mutual sliding action of the second limiting portion 32 and the downward pressing slope 222, the head end (end close to the stop end) of the pressing plate 2 is tilted upward (see fig. 2), so that the optical fiber 100 can be taken out more easily.

In one embodiment of the present invention, referring to fig. 4, the optical fiber connector 200 further includes an optical fiber lead-in portion 13, and the optical fiber lead-in portion 13 is disposed to facilitate the insertion of the optical fiber 100 into the first receiving groove 121 of the optical fiber container 12. Specifically, the optical fiber lens 11, the optical fiber container 12, and the optical fiber introduction part 13 are connected in this order, the optical fiber introduction part 13 is provided with an optical fiber introduction hole 131, the optical fiber introduction hole 131 is provided axially through the optical fiber introduction part 13, and the optical fiber introduction hole 131 is communicated with the first accommodation groove 121. When the optical fibers 100 are spliced, the end face of one of the optical fibers 100 is cut, the end of the optical fiber 100 is inserted into the first receiving groove 121 from the optical fiber introduction hole 131, the end of the optical fiber 100 abuts against the stop end face 123, and then the sleeve 3 is axially moved to press the optical fiber 100 by the pressing plate 2.

The fiber lens 11 and the fiber introduction part 13 may be cylindrical.

Alternatively, the optical fiber lens 11 and the optical fiber container 12 are integrally formed, and both of them may be made of plastic material and integrally injection-molded. Alternatively, the fiber lens 11, the fiber container 12 and the fiber introduction part 13 may be integrally molded, and all of them may be made of plastic, and they may be integrally injection molded.

In one embodiment of the present invention, the outer diameter of the standard fiber optic connector pin is D0, the outer diameter D1 of the fiber lens 11 can be the same as D0, or the difference between D1 and D0 can be set to 1-2 um to compensate for the machining tolerance. The lens optical surface 111 may be spherical or aspherical with a focal length of between 2 and 4 mm.

Alternatively, the volume of the refractive index matching fluid is not less than the sum of the volume of the fluid groove 122 and the volume of the 1mm optical fiber 100, so that the optical fiber 100 does not affect the splicing quality of the optical fiber 100 when the optical fiber 100 is moved at a fine pitch in the axial direction.

In one embodiment of the present invention, referring to fig. 3, the annular protrusion 112 is protruded from the circumference of the lens optical surface 111 along the axial direction thereof, the annular protrusion 112 is disposed around the circumference of the lens optical surface 111, and the top surface of the annular protrusion 112 protrudes from the lens optical surface 111, so as to prevent the lens optical surface 111 from being scratched and contaminated. Moreover, the lens optical surface 111 does not contact with other components during the splicing process of the whole optical fiber 100, so that the cleanness and the integrity of the lens optical surface 111 are ensured.

In one embodiment of the present invention, referring to fig. 2 and 3, the optical fiber connector 200 further includes a front connector housing 4, the end of the optical fiber lens 11 having the lens optical surface 111 is disposed to extend out of the front connector housing 4, and the optical fiber container 12, the pressing plate 2 and the sleeve 3 are disposed in the front connector housing 4. The head end of the connector front shell 4 has a third axial positioning end face 42, the optical fiber container 12 is connected with the optical fiber lens 11 in a step shape, so that the head end of the optical fiber container 12 has a fourth axial positioning end face 124, and the fourth axial positioning end face 124 abuts against the third axial positioning end face 42, thereby limiting the axial position of the optical fiber container 12.

The front shell assembly is composed of the connector front shell 4, the optical fiber lens 11, the optical fiber container 12, the pressing plate 2 and the sleeve 3, and the front shell assembly can be assembled into a whole in advance.

Referring to fig. 2, the front connector housing 4 is provided with an operation hole 41, and the operation hole 41 exposes at least a portion of the sleeve 3, so as to facilitate operations such as axial movement of the sleeve 3. The shape and size of the operation hole 41 are not limited herein, and it is sufficient to facilitate the operation of the sleeve 3. Referring to fig. 7, a push slot 33 is formed on the sleeve 3, and the push slot 33 is exposed through the operation hole 41, so that the optical fiber 100 connecting person can move the sleeve 3 conveniently. In other embodiments, the sleeve 3 may also be provided with a hand-pushing portion, or a pattern, an anti-slip pattern, or other structures for increasing friction.

In one embodiment of the present invention, referring to fig. 1, the optical fiber connector 200 further includes a connector rear housing 5, and the optical fiber 100 is partially located in the connector front housing 4 and partially located in the connector rear housing 5. The connector front case 4 and the connector rear case 5 are detachably connected. In splicing the optical fibers 100, the end of one of the optical fibers 100 is cut, passed through the connector rear housing 5, and then inserted into the front housing assembly, so that the cut end of the optical fiber 100 abuts against the stopper end face 123, the sleeve 3 is moved so that the pressing plate 2 presses the optical fiber 100, and then the connector rear housing 5 is connected to the connector front housing 4.

Alternatively, referring to fig. 8, the front connector housing 4 and the rear connector housing 5 are snap-connected, the front connector housing 4 is provided with a snap 43, and the rear connector housing 5 is provided with a snap hole 52. In other embodiments, the front connector housing 4 is provided with a locking hole, and the rear connector housing 5 is provided with a locking buckle.

Alternatively, an elastic member 6 is disposed between the connector front shell 4 and the connector rear shell 5, and the elastic member 6 may abut between a tail end of the connector front shell 4 and a head end of the connector rear shell 5. The elastic member 6 functions to stabilize the connection between the connector front case 4 and the connector rear case 5 and prevent the connector front case 4 and the connector rear case 5 from shaking each other. The elastic member 6 may be a spring, and the spring may be sleeved on the outer circumference of the optical fiber introduction part 13.

Optionally, referring to fig. 1, the optical fiber connector 200 further includes a horn set 51, the horn set 51 is for the optical fiber 100 to pass through, and the horn set 51 is used for clamping the optical fiber 100, so that the optical fiber 100 cannot move axially. The horn end of the horn kit 51 is located outside the connector rear case 5, and the other end of the horn kit 51 protrudes into the inside of the connector rear case 5.

Optionally, referring to fig. 1 and 8, the optical fiber connector 200 further includes a fiber tail sheath 7, the fiber tail sheath 7 is threadably connected to the connector rear shell 5, and the fiber tail sheath 7 is used for protecting the optical fiber 100 at the tail portion.

Referring to fig. 9 and 10, the present invention further provides an optical fiber cold connecting apparatus, which includes two optical fiber connectors 200 in any of the above embodiments, and further includes an adapter flange 300, wherein the adapter flange 300 connects the two optical fiber connectors 200, and the lens optical surfaces 111 of the two optical fiber connectors 200 are disposed opposite to each other.

Specifically, when the optical fiber 100 is spliced, one of the optical fibers 100 is stripped, the loose tube of the inner optical fiber 100 is removed by using a tool such as a wire stripper, the bare optical fiber 100 is exposed, the end of the optical fiber 100 is cut, the optical fiber 100 is sequentially passed through the optical fiber tail jacket 7 and the connector front shell 4, the optical fiber 100 is inserted into the front shell assembly, the end face of the optical fiber 100 abuts against the stopper end face 123, the connector front shell 4 and the connector rear shell 5 are connected, and the optical fiber tail jacket 7 is connected to the connector rear shell 5. The other optical fiber 100 is repeatedly operated according to the above-described steps, thereby obtaining two optical fiber connectors 200 to which the optical fibers 100 are assembled. Finally, the two optical fiber connectors 200 are connected by the adapter flange 300, thereby completing the splicing of the two optical fibers 100.

The optical fiber cold-connection device provided by the invention adopts the optical fiber connector 200, the optical fiber 100 is inserted into the optical fiber container 12, the optical fiber container 12 is provided with the liquid groove 122 for containing the refractive index matching liquid, the optical fiber 100 is butted with the optical fiber lens 11 through the refractive index matching liquid, the pressing plate 2 presses the optical fiber 100 in the optical fiber container 12 under the action of the sleeve 3, and after the sleeve 3 fixes the pressing plate 2 and the optical fiber container 12, the optical fiber 100 cannot move axially in the optical fiber container 12, thereby reducing reflection and loss. Moreover, the fiber lens 11 has a lens optical surface 111, so that divergent light emitted by the inserted optical fiber 100 can be converted into collimated light for transmission, an optical path inside the fiber lens 11 is a relatively long-focus collimated optical path, which is insensitive to the axial position of the optical fiber 100, and the splicing quality of the optical fiber 100 is obviously superior to the direct alignment of the traditional cold-splicing scheme under the condition that the cut end surface of the optical fiber 100 is uneven.

In one embodiment of the present invention, referring to fig. 2, two fiber lenses 11 are disposed at intervals, so that the optical fiber cooling device is in a non-contact connection, and the service life is greatly prolonged. Optionally, a length of a pin of the standard fiber optic connector for plugging with the adapter flange 300 is L0, a length of the fiber lens 11 for plugging with the adapter flange 300 is L1, and L1 is smaller than L0, so that the two fiber lenses 11 do not contact each other.

The above description is intended to be illustrative of the preferred embodiment of the present invention and should not be taken as limiting the invention, but rather, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Claims (12)

1. Fiber connector, its characterized in that: the optical fiber container comprises an optical fiber lens, an optical fiber container connected with the optical fiber lens, a pressing plate used for pressing an optical fiber in the optical fiber container and a sleeve used for pressing the pressing plate and the optical fiber container, wherein one end, far away from the optical fiber container, of the optical fiber lens is provided with a lens optical surface, and the pressing plate and the optical fiber container both penetrate through the sleeve.

2. The fiber optic connector of claim 1, wherein: the optical fiber container is provided with a first containing groove used for containing the optical fiber and a liquid groove used for containing refractive index matching liquid, the end part of the first containing groove is provided with a stopping end face used for axially stopping the optical fiber, and the stopping end face is provided with an opening communicated with the liquid groove and the first containing groove.

3. The fiber optic connector of claim 2, wherein: one side of the pressing plate, which is far away from the first accommodating groove, is provided with a first guide inclined plane, the interior of the sleeve is provided with a second guide inclined plane used for compressing the first guide inclined plane, and the first guide inclined plane and the axial direction of the optical fiber are arranged at an acute angle.

4. The fiber optic connector of claim 1, wherein: one side of the pressing plate, which is used for being far away from the optical fiber, is also provided with a first limiting part, and the sleeve is provided with a second limiting part which is in limiting fit with the first limiting part.

5. The fiber optic connector of claim 4, wherein: the clamp plate comprises a pressing portion and a cantilever portion, the pressing portion is used for pressing the optical fiber, the cantilever portion is connected with the cantilever portion of the pressing portion, the cantilever portion and the optical fiber container are arranged at intervals, the first limiting portion and the second limiting portion are connected in an inserting mode and are limited, the length of the first limiting portion is smaller than that of the second limiting portion in the axial direction of the optical fiber, the first limiting portion is arranged on the cantilever portion, and a pressing inclined plane is arranged at one end, far away from the pressing portion, of the first limiting portion.

6. The fiber optic connector of claim 2, wherein: the optical fiber connector further comprises an optical fiber leading-in part, the optical fiber lens, the optical fiber container and the optical fiber leading-in part are sequentially connected, an optical fiber leading-in hole for the optical fiber to pass through is formed in the optical fiber leading-in part, and the optical fiber leading-in hole is communicated with the first accommodating groove.

7. The fiber optic connector of claim 6, wherein: the optical fiber lens and the optical fiber container are integrally formed; alternatively, the fiber lens, the fiber container, and the fiber introduction part are integrally molded.

8. The fiber optic connector of claim 1, wherein: the optical fiber connector further comprises a connector front shell, one end, provided with the lens optical surface, of the optical fiber lens extends out of the connector front shell, the optical fiber container, the pressing plate and the sleeve are arranged in the connector front shell, and an operation hole enabling the sleeve to be at least partially exposed is formed in the connector front shell.

9. The fiber optic connector of claim 8, wherein: fiber connector still includes the connector backshell, the connector backshell with the connection can be dismantled to the connector front shell, the connector backshell is kept away from the one end of connector front shell is provided with the loudspeaker external member, the loudspeaker external member supplies optic fibre passes and is used for the joint optic fibre, the loudspeaker end of loudspeaker external member is located the outside of connector backshell, the other end of loudspeaker external member stretch into to the inside of connector backshell.

10. The fiber optic connector of any of claims 1-9, wherein: the periphery of the optical lens surface is convexly provided with an annular boss used for protecting the optical surface of the lens along the axial direction.

11. The optical fiber cold connection device is characterized in that: comprising two optical fiber connectors according to any of claims 1-10, further comprising an adapter flange connecting two of said optical fiber connectors, with said lens optical surfaces of two of said optical fiber connectors facing each other.

12. A cold-splice device for optical fibers according to claim 11, wherein: two optical lenses are arranged at intervals.

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