CN202453541U

CN202453541U - Dustproof cap for optical fiber connector and optical fiber connector module

Info

Publication number: CN202453541U
Application number: CN2011205464057U
Authority: CN
Inventors: 杜丽萍; 童朝阳; 葛烁仁
Original assignee: Tyco Electronics Shanghai Co Ltd
Current assignee: Tyco Electronics Shanghai Co Ltd
Priority date: 2011-12-23
Filing date: 2011-12-23
Publication date: 2012-09-26
Anticipated expiration: 2021-12-23

Abstract

A dustproof cap for an optical fiber connector comprising: a housing, a ferrule protruding from the housing, a locking arm protruding from the outside of the housing, and locking protrusions protruding from both sides of the locking arm . The dustproof cap includes: a receiving part, defined by a front wall, two side walls, an upper wall and a lower wall, for accommodating the ferrule and a part of the housing of the optical fiber connector; and two elastic walls, respectively Extending backward and upward from the two side walls, the ends of the elastic walls respectively form blocking protrusions extending toward each other, and there is a distance between the blocking protrusions that allows the locking arm of the optical fiber connector to pass through but prevents the locking protrusions from passing through. The dust-proof cap has no contact with the ferrule of the fiber optic connector, and achieves direct interference and sealing with the outer shell of the fiber optic connector, which can effectively prevent the dust cap from being removed from the fiber optic connector due to external forces during transportation and installation. Fall off to ensure that the dust cap plays an effective role in dust prevention and protection.

Description

The dust cap and the fiber optic connector assembly that are used for the joints of optical fibre

Technical field

The utility model relates to a kind of joints of optical fibre that are used for data communication and telecommunication applications, particularly relates to a kind of lock pin and dust cap that prevents dust entering joints of optical fibre inside and the fiber optic connector assembly with this dust cap that is used to protect the joints of optical fibre.

Background technology

In disparate networks communication terminals such as computing machine, router, server, switch for example, for example be fixed on the socket connector in the wall and user terminal is electrically connected with External cable through pin connector is plugged into usually.Particularly, in optical fiber communication, the connection between the needs use joints of optical fibre realization different fiber, distribution, switching etc.

Fig. 1 shows a kind of schematic perspective view of existing LC fiber optic connector assembly 200.This fiber optic connector assembly 200 comprises: the joints of optical fibre 201 shown in Figure 2 and the dust cap 202 that is combined in connector 201 1 ends.The joints of optical fibre 201 comprise: housing 204, the lock pin 203 that stretches out from housing 204, the lock arm 205 that extends to form from the outer inclination of housing 204, at two of lock arm 205 side-prominent locking projections 206 and be formed on the housing 204 and be used for the actuating arm 207 of driven locking arm 205 near the outside surface of housing 204.

In fiber optic connector assembly 200, dust cap 202 is directly interfered with the lock pin 203 of the joints of optical fibre 201 and/or housing 204 inwalls of the joints of optical fibre, thereby dust cap 202 is installed on the joints of optical fibre 201.Do not realize sealing fully between this dust cap 202 and the housing 204, dustproof effect can not satisfy request for utilization.Particularly; In test process; Be prone to pollutant is directly delivered to fiber end face or pollutant is delivered on the sidewall of lock pin 203 through plug dust cap 202, and under the influence of factors such as storage environment or transportation, pollutant transmits and is attached to lock pin 203 and/or fiber end face the most at last; And be difficult to cleaning, thereby influence the optical transmission performance of the joints of optical fibre.Further, and get into housings 204 when inner at dust cap 202, dust cap 202 does not possess guide effect, easily maloperation and damage or pollute lock pin 203.

The utility model content

The technical matters that the utility model solved is to provide a kind of dust cap that is used for the joints of optical fibre; The lock pin of the dust cap and the joints of optical fibre is contactless; And realize direct interference seal with the shell of the joints of optical fibre; Can effectively avoid because of causing dust cap to split away off under the external force effect of factors in the processes such as transportation, installation, guarantee that dust cap plays effectively dustproof and protective effect from the joints of optical fibre.

The present invention also provides a kind of connector assembly that comprises the joints of optical fibre and dust cap.

Embodiment according to an aspect of the utility model; A kind of dust cap that is used for the joints of optical fibre is provided, and the said joints of optical fibre comprise: housing, the lock pin that stretches out from housing, outstanding connecting portion, the lock arm that tilts to extend to form from said connecting portion and at two of lock arm side-prominent locking projections from the outside of housing.Said dust cap comprises: the accommodation section, and limit an antetheca, two sidewalls, a upper wall and a lower wall and to form, be used to hold lock pin and a part of housing of the said joints of optical fibre; And two elastic walls; Respectively from two said sidewalls backward with extend upward; The end of said elastic wall forms in opposite directions the projection that stops of extending respectively, said stop have between the projection lock arm that allows the said joints of optical fibre through but the distance that stops said locking projection to pass through.

According to the further embodiment of the utility model; A kind of dust cap that is used for the joints of optical fibre is provided; The said joints of optical fibre comprise: housing, the lock pin that stretches out from housing, outstanding connecting portion, the lock arm that tilts to extend to form from said connecting portion and at two of lock arm side-prominent locking projections from the outside of housing; Said dust cap comprises: the accommodation section; Limit an antetheca, two sidewalls, a upper wall and a lower wall and to form, be used to hold lock pin and a part of housing of the said joints of optical fibre; And two elastic walls; Respectively from two said sidewalls backward with extend upward; The end of said elastic wall forms the projection that stops of extending in opposite directions respectively; When said dust cap installation in position, the said projection that stops is positioned at said locking projection back, and said stop between the projection apart from d greater than the width of the lock arm of the said joints of optical fibre and less than the width d1 between the said locking projection; When said two elastic wall power effects are outside outwards opened, said stop between the projection can be apart from d greater than the width d1 between the said locking projection to allow said locking projection therebetween from passing through.

In above-mentioned dust cap, said upper wall is provided with the recess of at least a portion of the lock arm that is used to hold the said joints of optical fibre.

In above-mentioned dust cap; Said upper wall is provided with the recess of roughly " Contraband " shape of the connecting portion that is used to expose the said joints of optical fibre; Horizontal edge of said recess and two vertical edges are fitted with the corresponding edge of the connecting portion of said lock arm respectively; And the length of said horizontal edge is slightly less than the length of the corresponding edge of said connecting portion, so that three corresponding edge of said recess and said connecting portion form interference respectively.

In above-mentioned dust cap, the lead angle that two arcs are formed respectively on two vertical edge bottoms of said recess inserts in the said recess with the connecting portion that guides said lock arm.

In above-mentioned dust cap, the part from said recess to two sidewall of said upper wall forms guide portion, and said guide portion flatly extends to the end of elastic wall further on said elastic wall.

In above-mentioned dust cap, the periphery of said upper wall, sidewall and lower wall and said housing forms interference seal.

In above-mentioned dust cap, the said blocking surface of projection that stops tilts, and the said projection that stops has the width that on bearing of trend, narrows down gradually in vertical view.

In above-mentioned dust cap, the said downside surface of projection that stops tilts, and the said section that is parallel to said elastic wall of projection that stops has the thickness that narrows down gradually from front to back.

According to the further embodiment of the utility model, a kind of fiber optic connector assembly is provided, comprising: the joints of optical fibre; And the described dust cap of above-mentioned various embodiment.

Do not come in contact according to the dust cap of the above-mentioned various embodiment of the utility model and the for example lock pin of the LC type joints of optical fibre, and realize that with the shell of the joints of optical fibre direct interference seal cooperates, avoid dust cap to contact with lock pin.In addition, dust cap can effectively be avoided because of under the external force effect of factors, causing dust cap to split away off from connector in the processes such as transportation, guarantees that dust cap plays effectively dustproof and protective effect.In addition, dust cap is being installed to the joints of optical fibre and/or from the operating process that the joints of optical fibre pull away, is all need not to push the actuating arm of the joints of optical fibre.

Description of drawings

The utility model will come further explain with reference to accompanying drawing, wherein:

Fig. 1 is the cut-open view that the joints of optical fibre cooperate with dust cap in the prior art;

Fig. 2 is the schematic perspective view of the traditional joints of optical fibre;

Fig. 3 is the schematic perspective view that is equipped with according to the fiber optic connector assembly of the dust cap of a kind of embodiment of the utility model;

Fig. 4 is the side view of fiber optic connector assembly shown in Figure 3;

Fig. 5 is the cut-open view of fiber optic connector assembly shown in Figure 3;

Fig. 6 is the schematic perspective view of dust cap on a kind of direction according to a kind of embodiment of the utility model;

Fig. 7 is the schematic perspective view of dust cap on another kind of direction shown in Figure 6;

Fig. 8 is the vertical view of dust cap shown in Figure 6; And

Fig. 9 is a dust cap shown in Figure 6 cut-open view along center line.

Embodiment

Though will fully describe the utility model with reference to the accompanying drawing of the preferred embodiment that contains the utility model; But, this should be appreciated that those of ordinary skill in the art can revise utility model described herein, obtains the technique effect of the utility model simultaneously before describing.Therefore, must understand above description to those of ordinary skill in the art and Yan Weiyi discloses widely, and its content does not lie in the described exemplary embodiment of restriction the utility model.

Fig. 3 is the schematic perspective view that is equipped with according to the fiber optic connector assembly 300 of the dust cap 10 of a kind of embodiment of the utility model.The joints of optical fibre 100 shown in Fig. 3 can be realized the continuing, distribute or transfer of optical fiber of optical cable.Need to prove that for the purpose of convenient the description, in this article, be basis with the modes of emplacement of the fiber optic connector assembly among Fig. 3 300, the side that lock pin among Fig. 5 102 is belonged to is called " preceding "; To be called " back " with lock pin 102 relative sides (being a side at tail pipe 107 places); One side at lock arm 103 places is called " on ".

A kind of embodiment according to the utility model; A kind of dust cap 10 that is used for the joints of optical fibre 100 is provided, and the joints of optical fibre 100 comprise: roughly the housing 101 of cuboid, the lock pin 102 that stretches out from housing 101, from the outside of housing 101 outstanding connecting portion 105, the lock arm 103 that tilts to extend to form from said connecting portion and at two of lock arm side-prominent locking projections 104.Dust cap 10 comprises the accommodation section 1 with spatial accommodation that the outer shape with housing 101 is complementary; Limit an antetheca 11, two sidewalls 12, a upper wall 13 and a lower wall 14 and to form, be used for the lock pin 102 and a part of housing 101 of receiving optical fiber connector 100.Dust cap 10 also comprise respectively from two sidewalls 12 backward with two elastic walls 2 that upwards extend integratedly; The end of elastic wall 2 form respectively in opposite directions extend stop 21, two of projections stop have between the projection 21 lock arm 103 that allows the joints of optical fibre 100 through but stop that said locking projection passes through apart from d (referring to Fig. 8).The dust cap 10 of the utility model can form by for example thermoplastic is molded integratedly.When dust cap 10 installation in position; Stop that projection 21 is positioned at locking projection 104 back; And stop between the projection 21 apart from d greater than the width of the lock arm 103 of the joints of optical fibre 100 and less than the width d1 between the outermost of locking projection 104; Thereby be under the free state at elastic wall 2, stop that projection 21 can stop the joints of optical fibre 100 to break away from dust cap 10; When two elastic wall 2 power effects are outside outwards opened; Stop between the projection 21 can be apart from d greater than the width d1 between the outermost of locking projection 104; Allowing locking projection 104 from passing through therebetween, thereby make the joints of optical fibre 100 to break away from from dust cap 10.

Dust cap 10 further embodiment according to the utility model; Referring to Fig. 7-9; Upper wall 13 is provided with the recess 131 of roughly " Contraband " shape of the connecting portion 105 that is used to expose the joints of optical fibre 100; Horizontal edge 1311 of recess 131 and two vertical edges are fitted with the corresponding edge of the connecting portion 105 of lock arm 103 respectively, and the length of horizontal edge 1311 is slightly less than the length of the corresponding edge of connecting portion 105, so that three corresponding edge of recess 131 and connecting portion 105 form interference respectively.Like this; When dust cap 10 being installed in 100 last times of the joints of optical fibre; Just in time being contained in the recess 131 of lock arm 103, and the front end 1031 of lock arm 103 horizontal edge 1311 that reclines with housing 101 connecting portions 105, thus 10 pairs of housings 101 of dust cap are accurately located.At this moment; The upper wall 13 of dust cap 10, lower wall 14 and two sidewalls 12 form interference seal with the periphery of the housing 101 of the joints of optical fibre 100; Make dust cap 10 to seal fully the lock pin in the joints of optical fibre 100 102, blocks dust contacts with lock pin 102.Further, the lead angle of two arcs is formed respectively on two vertical edge bottoms of recess 131, in the connecting portion 105 insertion recesses 131 with guide housing 100.

Further, the part from 131 to two sidewalls 12 of recess of upper wall 13 forms guide portion 132, and said guide portion 131 flatly extends to the end of elastic wall further on elastic wall 2.Like this; When dust cap 10 is installed in the process on the joints of optical fibre 100; The part that is connected with housing 101 of the lock arm 103 on the housing 101 of the joints of optical fibre 100 is under the guiding of guide portion 132; Accurately get in the recess 131, thereby guide whole housing 101 to get in the accommodation section 1 of dust cap 10.

Referring to Fig. 7 and 9, stop that the downside surface 212 of projection 21 tilts, and the section that is parallel to elastic wall 2 that stops projection 21 has from front to back the thickness that (among Fig. 9 from left to right) narrows down gradually.Like this, when dust cap 10 is installed to 100 last times of the joints of optical fibre, the locking projection 104 on the lock arm 103 will slide from the downside surface 212 that tilts smoothly, make installation process more steady.Even need not to push actuating arm 103 and just can utilize the lock arm 103 of 212 pairs of inclinations of downside surface of inclination to oppress, cause lock arm 103 to drive locking projections 104 and squint downwards, thereby the joints of optical fibre 100 are inserted in the dust cap 10.

Further; Referring to Fig. 8 and 9; In the further embodiment of the dust cap of the utility model; The blocking surface (promptly facing the surface of antetheca 11) 211 that stops projection 21 tilts, and stops that projection 21 has the width that (from outside to inside promptly) narrows down gradually on bearing of trend in vertical view shown in Figure 8.As shown in Figure 3; After being installed in dust cap 10 on the joints of optical fibre 100; The blocking surface 211 that stops projection 21 will be against the locking projection 104 of living the joints of optical fibre 100; Thereby certain confining force is provided, has guaranteed the positiver sealing between the dust cap 10 and the joints of optical fibre 100, and prevented that dust cap 10 breaks away from from the joints of optical fibre 100.Because blocking surface 211 tilts; The mode through pulling with dust cap 10 when the joints of optical fibre 100 separate; Locking projection 104 on the lock arm 103 can drive two elastic walls 2 simultaneously with respect to blocking surface 211 slips and outwards open; When stop between the projection 21 expand to apart from d greater than between the outermost of two locking projections 104 on the lock arm 103 apart from d1 (referring to Fig. 2 and 3) time; Locking projection 104 can be stopped between the projection 21 from two pass, and the housing 101 of the joints of optical fibre 100 is separated with dust cap 10.

The dust cap 10 that describes below the utility model is installed on the joints of optical fibre 100 to form the operating process of fiber optic connector assembly 300.At first; For example hold dust cap 10 with left hand; Hold the joints of optical fibre 100 by the right hand and promote dust cap 10; At this moment, slide along the blocking surface that stops projection 21 211 under the thrust that two elastic walls 2 of dust cap 10 externally apply, make the part of housing 101 of the joints of optical fibre 100 get in the accommodation section 1 of dust cap 10; Referring to Fig. 3 and 5, when the front end (right-hand member among Fig. 5) 1031 of the lock arm 103 of the joints of optical fibre 100 touched recess 131 horizontal edges 1311, the locking projection 104 of the joints of optical fibre 100 was against the blocking surface 211 that firmly stops on the projection 21.So the lock arm 103 and the locking projection 104 of the joints of optical fibre 100 receives the horizontal edge 1311 and the restriction that stops projection 21 of dust cap 10 on fore-and-aft direction.That is to say; After being installed to dust cap 10 on the joints of optical fibre 100 fully; Front end 1031 at lock arm 103 terminates in horizontal edge 1311, and cooperating between the interference seal of the upper wall 13 of dust cap 10, lower wall 14 and two sidewalls 12 and the periphery of the housing 101 of the joints of optical fibre 100 and the locking projection 104 that stops the projection 21 and the joints of optical fibre 100 of dust cap 10 is locked in dust cap 10 on the joints of optical fibre 100 effectively.

Particularly; Because two of dust cap 10 stop that projection 21 is separately positioned on two unsettled elastic walls 2; And exist between them apart from d, with dust cap 10 when the joints of optical fibre 100 are extracted, for example hold dust cap 10 with left hand; Hold the joints of optical fibre 100 with the right hand and promote dust cap 10; At this moment, the drawing that two elastic walls 2 of dust cap 10 externally apply parts a little owing to self elasticity produces down automatically, when stop between the projection 21 expand to apart from d greater than between the outermost of two locking projections 104 on the lock arm 103 apart from d1 (referring to Fig. 2 and 3) time; Even need not to push the lock arm 103 of the joints of optical fibre 100, just can make the housing 101 of the joints of optical fibre 100 separate with dust cap 10.Certainly, if the actuating arm 105 of pushing the joints of optical fibre 100 will help to make dust cap 10 to separate from the joints of optical fibre 100, stop this moment to keep the not state of nature of expansion apart from d between the projection 21.This operating process also is applicable to dust cap 10 is installed on the joints of optical fibre 100.

According to the utility model embodiment on the other hand, a kind of fiber optic connector assembly 300 is provided, comprising: the joints of optical fibre 100; And the described dust cap 10 of above-mentioned various embodiment.

Dust cap 10 according to the above-mentioned various embodiment of the utility model; Shell 101 through and the joints of optical fibre 100 inner at dust cap 10 all around and the interference of fore-and-aft direction realize the locking between the dust cap and the joints of optical fibre; Can effectively avoid because of under the external force effect of factors, causing dust cap 10 to split away off in the processes such as transportation, guarantee that dust cap plays effectively dustproof and protective effect from the joints of optical fibre 100.Lock pin 102 according to the dust cap of the above-mentioned various embodiment of the utility model and the joints of optical fibre 100 is contactless, and realizes directly interference with joints of optical fibre shell, has avoided dust cap 10 to contact with lock pin 102.

Further, the guide part 132 of dust cap 10 can reduce lock pin 102 and dust cap 10 around contact the possibility of pollution that brings.Closely interference engagement is realized in outside through the design joints of optical fibre 100 inwalls and housing 101, can improve sealing, thereby isolates with space outerpace, effectively stops the end face of the possible contaminants of external environment condition to the joints of optical fibre.In addition,, can process whole dust cap, thereby realize effective seal by harder or softer material according to the wall thickness of dust cap 10.The projection 21 that stops that has the inclination blocking surface provides confining force further, guarantees the firmness that seals between the dust cap and the joints of optical fibre.In addition, dust cap is being installed to the joints of optical fibre and/or from the operating process that the joints of optical fibre pull away, is all need not to push the actuating arm of the joints of optical fibre.Simultaneously, help dust cap to be installed to the joints of optical fibre if push the actuating arm of the joints of optical fibre from joints of optical fibre separation and/or with dust cap.

It will be appreciated by those skilled in the art that; Above described embodiment all be exemplary; And those skilled in the art can make improvements; Independent assortment be can carry out under the situation of the conflict of the structure described in the various embodiment aspect not recurring structure or principle, thereby on the basis of the technical matters that solves the utility model, more kinds of dust caps and fiber optic connector assembly realized.

After the preferred embodiment that specifies the utility model; Those of ordinary skill in the art can clearly understand; Under protection domain that does not break away from the claim of enclosing and spirit, can carry out various variations and change, and the utility model also is not subject to the embodiment of the exemplary embodiment of lifting in the instructions.

Claims

1. A dustproof cap (10) for an optical fiber connector (100), the optical fiber connector comprising: a housing (101), a ferrule (102) protruding from the housing, The protruding connecting part (105), the locking arm (103) formed by obliquely extending from the connecting part, and the locking protrusions (104) protruding from both sides of the locking arm, are characterized in that the dustproof cap includes:

The accommodating portion (1), defined by a front wall (11), two side walls (12), an upper wall (13) and a lower wall (14), is used to accommodate the ferrule of the optical fiber connector and a portion of the housing; and

Two elastic walls (2) respectively extend backward and upward from the two side walls, and the ends of the elastic walls respectively form blocking protrusions (21) extending towards each other, and when the dustproof cap (10) is installed When in position, the blocking protrusion is located behind the locking protrusion (104), and the distance d between the blocking protrusions is greater than the width of the locking arm of the optical fiber connector and smaller than the width d1 between the locking protrusions; When the two elastic walls expand outwards under the action of an external force, the distance d between the blocking protrusions may be greater than the width d1 between outermost sides of the locking protrusions to allow the locking protrusions to pass therebetween.

2. The dustproof cap according to claim 1, wherein the upper wall is provided with a substantially "匚"-shaped notch (131) for exposing the connecting portion of the optical fiber connector, and the notch is A horizontal side and two vertical sides of the mouth are fitted with corresponding sides of the connecting part of the locking arm respectively, and the length of the horizontal side is slightly shorter than the length of the corresponding side of the connecting part, so that the notch (131) interfere with three corresponding sides of the connecting portion, respectively.

3. The dustproof cap according to claim 2, characterized in that, the bottoms of the two vertical sides of the notch (131) respectively form two arc-shaped chamfers, so as to guide the connecting part to insert into the notch In the mouth (131).

4. The dustproof cap according to claim 1, characterized in that, the part of the upper wall from the notch to the two side walls forms a guide part (132), and the guide part is further in the The elastic wall extends horizontally to the end of the elastic wall.

5. The dust cap of claim 1, wherein the upper, side, and lower walls form an interference seal with a periphery of the housing.

6. The dustproof cap according to any one of claims 1-5, characterized in that, the blocking surface (211) of the blocking protrusion is inclined, and the blocking protrusion has a gradual change in the extension direction in a plan view. narrow width.

7. The dustproof cap according to any one of claims 1-5, wherein the underside surface of the blocking protrusion is inclined, and the section of the blocking protrusion parallel to the elastic wall has a direction from front to Then gradually narrows in thickness.

8. The dustproof cap according to claim 6, wherein the underside surface of the blocking protrusion is inclined, and the section of the blocking protrusion parallel to the elastic wall has a thickness gradually narrowing from front to back .

9. An optical fiber connector assembly (300), characterized in that it comprises:

fiber optic connector (100); and

The dustproof cap according to any one of claims 1-8.