CN201622372U

CN201622372U - Non-regulated LC optical fiber connector

Info

Publication number: CN201622372U
Application number: CN2010201375613U
Authority: CN
Inventors: 尤建昌; 郝艳辉; 李涛; 朱信海; 杨明冬
Original assignee: Accelink Technologies Co Ltd
Current assignee: Accelink Technologies Co Ltd
Priority date: 2010-03-23
Filing date: 2010-03-23
Publication date: 2010-11-03
Anticipated expiration: 2020-03-23

Abstract

The utility model discloses a non-regulated LC optical fiber connector comprising an optical fiber and a protecting cap, an outer sleeve, a tail seat and a tail sleeve which are axially and sequentially arranged, wherein the outer sleeve is internally assembled with a ceramic inserting needle assembly formed by pressing and connecting a ceramic inserting needle and a metal tail handle; a spring is arranged between the ceramic inserting needle and the tail seat; one end of the optical fiber is fixed in the ceramic inserting needle assembly; the tail sleeve is closely sheathed on the optical fiber; the outer sleeve is internally provided with a base hexagon guide hole which is matched with the metal tail handle and comprises a lengthened part; and the axial length of the base hexagon guide hole and the length of the metal tail handle are matched with the length of the spring when being applied by maximum pressure. The non-regulated LC optical fiber connector can completely overcome the two defects in the prior art, avoids generating the phenomena of shrinkage of the ceramic inserting needle and azimuth deflection of an APC structure, is convenient for operation and installation of engineering staffs and is suitable for engineering application.

Description

The non-adjustable type LC joints of optical fibre

Technical field

The utility model relates to the used joints of optical fibre of a kind of communication field, relates in particular to a kind of LC joints of optical fibre.

Background technology

Develop rapidly along with Fibre Optical Communication Technology, hypervelocity, jumbo dwdm system have been the construction focus of current transmission system, system channel is 16,32,40,48 ... 160 the tunnel, the capacity of ODF frame is also more than 1000 cores, thus, the size of fiber active linker is also required more and more littler, the LC joints of optical fibre are little with its volume, function admirable and arising at the historic moment becomes the new family of the joints of optical fibre.The LC fibre-optic connector structure is direct insertion, and ceramic contact pin is Φ 1.25mm, and its maximum characteristics are that a locking switch is arranged, and are convenient to firm connection.Owing to its volume features of smaller, can improve the density of the joints of optical fibre in the fibre distribution frame, at present, the LC joints of optical fibre become the at first joints of optical fibre of high-density systems, have occupied the leading position in market.

The LC joints of optical fibre conventional in the prior art are in the engineering use, because of after repeatedly ceramic contact pin end face pressurized is used in plug, producing following two kinds of defectives: the one,, for the PC structure, exist ceramic contact pin to bounce back in the connector, this mainly be since metal caudal peduncle hexagon guide frame and plastics front stall loose mail hexagonal base coupling bad due to, and it is irrecoverable to bounce back; The 2nd,, for the APC structure, except that existing ceramic contact pin to bounce back in the connector and irrecoverable, also may causing the orientation deflection of APC structure; Because the existence of above-mentioned defective causes it to lose efficacy in the use of the LC joints of optical fibre easily, thereby can not be fit to the practical application on the engineering.

The utility model content

Contract and orientation deflection (APC structure) problem in the ceramic contact pin at the conventional LC joints of optical fibre of above-mentioned prior art (0.9 tight tube fiber structure) existence, the utility model provides a kind of non-adjustable type LC joints of optical fibre, these joints of optical fibre can overcome existing two defectives in the present prior art fully, avoided in use occurring the orientation deflection phenomenon of ceramic contact pin retraction and APC structure, and be convenient to the engineering staff and operate installation, be fit to engineering and use.

In order to solve the problems of the technologies described above, the technical scheme that the non-adjustable type LC joints of optical fibre of the utility model are achieved is: these joints of optical fibre comprise optical fiber and the tin hat that sets gradually vertically, overcoat, tailstock and tail cover, be equipped with the ceramic contact pin subassembly that constitutes by ceramic contact pin and the crimping of metal caudal peduncle in the described overcoat, be provided with spring between described ceramic contact pin subassembly and the tailstock, one end of described optical fiber is fixed in the ceramic contact pin subassembly, and described tail cover is enclosed within on the optical fiber closely; Be provided with the base hexagon pilot hole that contains lengthening part that cooperates with the metal caudal peduncle in the described overcoat.

Compared with prior art, the beneficial effects of the utility model are: the axial dimension of the overcoat base hexagon pilot hole in the conventional LC joints of optical fibre is shorter, ceramic contact pin is in use during pressurized, phenomenon contracts in metal caudal peduncle guide frame occurs easily, if there is lateral force simultaneously, also will inevitably cause the rotation of metal caudal peduncle, because the retraction and the rotation of metal caudal peduncle, then can cause hexagonal guide frame of metal caudal peduncle and overcoat base hexagon pilot hole (L1 is less than normal for the overcoat base plastics hexagon pilot hole degree of depth) mismatch problems, finally cause the expendable bad phenomenon that contracts in the ceramic contact pin in the metal caudal peduncle guide frame.If the LC joints of optical fibre of APC structure can cause the orientation deflection of APC structure.Above situation all is easy to cause adjustable type LC joints of optical fibre inefficacy in engineering is used in the prior art.And the non-adjustable type LC joints of optical fibre of the utility model, by with the axial dimension lengthening of the overcoat base hexagon pilot hole of connector to improve its structure, the phenomenon of having avoided metal caudal peduncle guide frame to contract and rotate in occurring easily, the ceramic contact pin that fundamentally can solve metal caudal peduncle guide frame contract in the appearance and the technical matters of APC structure orientation deflection easily.Because the non-adjustable type LC joints of optical fibre of the utility model just carry out perfect to the inner structure of the existing LC joints of optical fibre, do not influence the extension elongation and the structure of the ceramic contact pin after the whole non-adjustable type joints of optical fibre assemble, its end face compressive resistance satisfies the relevant criterion requirement.The non-adjustable type LC joints of optical fibre of the utility model have kept its overall performance, both can satisfy the actual request for utilization of engineering, satisfy international structure and interface standard again, have good interchangeability in the application.

Description of drawings

Fig. 1 is the conventional LC fibre-optic connector structure of a prior art synoptic diagram;

Fig. 2 is the non-adjustable type LC fibre-optic connector structure of a utility model synoptic diagram;

Fig. 3-the 1st, the complete section vertical view of overcoat shown in Fig. 24;

Fig. 3-the 2nd, the end of overcoat 4 is to figure shown in Fig. 3-1;

Fig. 3-the 3rd, the front view of overcoat 4 shown in Fig. 3-1;

Fig. 4-the 1st, the complete section front view of the subassembly of ceramic contact pin shown in Fig. 2;

Fig. 4-the 2nd, the end of ceramic contact pin subassembly is to figure shown in Fig. 4-1;

Fig. 5 is the fundamental diagram of the utility model joints of optical fibre.

Description of reference numerals is as follows among the figure:

1. tin hat 2. ceramic contact pins 3. metal caudal peduncles 4. overcoats 40. pilot holes

41. lengthening part 5. springs 6. tailstocks 7. tails overlap 8. optical fiber

Embodiment

Provide specific embodiment below in conjunction with accompanying drawing, further specify the non-adjustable type LC fibre-optic connector structure of the utility model and how to realize.

As shown in Figure 2; a kind of non-adjustable type LC joints of optical fibre of the utility model; the tin hat 1 that comprises optical fiber 8 and set gradually vertically, overcoat 4, tailstock 6 and tail cover 7; be equipped with the ceramic contact pin subassembly that constitutes by

ceramic contact pin

2 and 3 crimping of metal caudal peduncle in the described overcoat 4; be provided with spring 5 between described ceramic contact pin subassembly and the tailstock 6; one end of described optical fiber 8 is fixed in the ceramic contact pin subassembly, and described tail cover 7 is enclosed within on the optical fiber 8 closely.

Each functions of components is: described overcoat 4 one side realize the assembling of loose mail inner with it (comprising: metal caudal peduncle 3, spring 5 and tailstock 6) on the other hand in order to satisfy international LC connector common-use size and standard interface; Described ceramic contact pin assembly is used for realizing optical fiber 8 precision-fit of portion and the assembling of overcoat 4 and spring 5 within it; Described spring 5 provides certain elastic force for metal caudal peduncle 3, realizes the assembling of ceramic contact pin subassembly in overcoat 4 and tailstock 6; Described tailstock 6 is used for overcoat 4, spring 5 and tail cover 7 are assembled; Described tail cover 7 and the protection of tailstock 6 assembling back realizations to connector afterbody optical cable 8; Described tin hat 1 can be realized the end face of the joints of optical fibre behind the grinding and polishing is protected.More than each component exception overlap outside 4 inner structure sizes, the structure at other positions and size and the conventional LC joints of optical fibre all are consistent, referring to Fig. 1 and Fig. 2.

Shown in Fig. 3-1, be provided with the base hexagon pilot hole 40 that contains lengthening part 41 that cooperates with metal caudal peduncle 3 in the described overcoat 4 in the utility model, the length the when axial length of described base hexagon pilot hole 40 and the length of metal caudal peduncle 3 and spring 5 are subjected to maximum pressure is suitable.As shown in Figure 5, specifically, the length of described base hexagon pilot hole 40 is L2, length when spring 5 is subjected to maximum pressure is Lc, and it is S2 that metal caudal peduncle guide head is faced length directly, and hexagonal base pilot hole bottom to the axial length of overcoat rear side end face is L on the overcoat 4, then the axial length L 2 of base hexagon pilot hole 40 equals L-(Lc+S2) at least in the utility model, certainly, for more reliable, its L2 is preferably greater than L-(Lc+S2).According to the specification difference of the joints of optical fibre, the axial length of described connector overcoat base hexagon pilot hole 40 is 2.7～4.1mm.

Overcoat 4 inner structures compared with prior art in the utility model joints of optical fibre, its difference has mainly embodied the realization principle of non-adjustable type LC fibre-optic connector structure, that is: the size of the axial length L 2 by increasing overcoat 4 (shown in Fig. 3-1) base hexagon pilot hole realizes the non-adjustable type LC joints of optical fibre, referring to Fig. 1, Fig. 2 and Fig. 3-1, this spot size L2 this spot size L1 in the prior art.

In the use of the non-adjustable type LC joints of optical fibre of the utility model, the ceramic contact pin subassembly (shown in Fig. 4-1 and Fig. 4-2) that (shown in the arrow among Fig. 5) ceramic contact pin 2 and metal caudal peduncle 3 constitute when ceramic contact pin 2 end faces are under pressure, with integral body back to the non-adjustable LC joints of optical fibre to moving, and spring 5 pressurizeds, when treating that spring 5 is compressed to ultimate value Lc (as shown in Figure 5), at this moment, the hexagon guide frame that guarantees metal caudal peduncle 3 still is included in the overcoat 4 base hexagon pilot holes 40, (the inside and outside hex-shaped surfaces structure interworking between metal caudal peduncle 3 and the overcoat base is good), and require metal caudal peduncle 3 non-rotatable, when the length of L2 satisfies following requirement: L2＞L-(S1+S2), can realize avoiding metal caudal peduncle 3 hexagon guide frames and overcoat 4 base hexagon pilot holes 40 that mismatch takes place, cause in the ceramic contact pin 2 and contract; Corresponding A PC structure can also avoid taking place the phenomenon of orientation deflection, and this L2 size is the size of the desired base hexagon of non-adjustable type LC joints of optical fibre pilot hole.Comparatively speaking, when the length of L2 is L2＜L-(S1+S2), be the LC joints of optical fibre (that is: the adjustable type LC joints of optical fibre) conventional in the prior art.

The advantage of the non-adjustable type LC joints of optical fibre of the utility model is: the change of overcoat 4 inner structure size L2, in solving ceramic contact pin 2, contract and APC structure orientation deflection phenomenon, do not influence the extension elongation and the structure of the ceramic contact pin 2 after the whole non-adjustable type joints of optical fibre assemble, its end face compressive resistance also satisfies the relevant criterion requirement.Remaining unchanged of the utility model joints of optical fibre overall performance and standard can be satisfied the actual request for utilization of engineering.

Although in conjunction with figure the utility model is described above; but the utility model is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; rather than it is restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; under the situation that does not break away from the utility model aim, can also make a lot of distortion, these all belong within the protection of the present utility model.

Claims

1. non-adjustable type LC joints of optical fibre, the tin hat (1) that comprises optical fiber (8) and set gradually vertically, overcoat (4), tailstock (6) and tail cover (7), be equipped with the ceramic contact pin subassembly that constitutes by ceramic contact pin (2) and metal caudal peduncle (3) crimping in the described overcoat (4), be provided with spring (5) between described ceramic contact pin subassembly and the tailstock (6), one end of described optical fiber (8) is fixed in the ceramic contact pin subassembly, and described tail cover (7) is enclosed within on the optical fiber (8) closely; It is characterized in that: be provided with the base hexagon pilot hole (40) that contains lengthening part (41) that cooperates with metal caudal peduncle (3) in the described overcoat (4).

2. according to the described non-adjustable type LC joints of optical fibre of claim 1, it is characterized in that: the length and the length of spring (5) when being subjected to maximum pressure of the axial length of described base hexagon pilot hole (40) and metal caudal peduncle (3) are suitable.

3. according to the described non-adjustable type LC joints of optical fibre of claim 1, it is characterized in that: the axial length of described base hexagon pilot hole (40) is 2.7～4.1mm.