CN215833654U

CN215833654U - Elastic locking splicing core and optical fiber quick connector thereof

Info

Publication number: CN215833654U
Application number: CN202122406608.2U
Authority: CN
Inventors: 王鑫; 余敏函
Original assignee: Hangzhou Runzhou Optoelectronic Technology Co ltd
Current assignee: Hangzhou Runzhou Optoelectronic Technology Co ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-02-15
Anticipated expiration: 2031-09-30

Abstract

The application relates to an elastically-locked splicing core and an optical fiber quick connector thereof, and relates to the field of optical fiber connectors, wherein the elastically-locked splicing core comprises a connecting core for splicing bare fibers and a locking ring which is sleeved outside the connecting core in a sliding manner; the connecting core comprises a substrate distributed on the peripheral side of the bare fiber and a pressing plate covered on the substrate, at least one of the back sides of the substrate and the pressing plate is provided with a locking convex part, and an elastic part abutted against the connecting core is connected to the locking ring and positioned on at least one of the back sides of the substrate and the pressing plate. This application has the less effect of temperature variation to the influence that the holding down pressure caused.

Description

Elastic locking splicing core and optical fiber quick connector thereof

Technical Field

The application relates to the field of optical fiber connectors, in particular to an elastic locking splicing core and an optical fiber quick connector thereof.

Background

The optical fiber quick connector is a device for making detachable (movable) connection between optical fibers, and precisely butt-joints two end faces of the optical fibers so as to maximally couple the light energy output by the transmitting optical fiber into the receiving optical fiber and minimize the influence of the light energy on the system caused by the intervention of the optical fiber into an optical link.

The conventional mode of providing the pushing force to the pressing plate is to provide the corresponding pushing force by a connecting mode of forming interference fit between the pressing plate and the locking block through the sliding locking block. When the temperature of the process of high and low temperature test or the environment changes, the size of the interference fit changes to a certain extent due to the characteristics of expansion with heat and contraction with cold of the material.

In practical application environments, the relationship between the change of the interference magnitude and the downward pressure is sensitive, and the change of the smaller interference magnitude can cause the downward pressure to increase or decrease sharply, so that the normal passage of the optical fiber connector is influenced.

SUMMERY OF THE UTILITY MODEL

In order to reduce the influence of temperature change on the downward pressure, the application provides an elastic locking splicing core and an optical fiber quick connector thereof.

In a first aspect, the present application provides an elastically locked splicing core, which adopts the following technical scheme:

an elastic locking splicing core comprises a connecting core for splicing bare fibers and a locking ring sleeved outside the connecting core in a sliding manner; the connecting core comprises a substrate distributed on the peripheral side of the bare fiber and a pressing plate covered on the substrate, at least one of the back sides of the substrate and the pressing plate is provided with a locking convex part, and an elastic part abutted against the connecting core is connected to the locking ring and positioned on at least one of the back sides of the substrate and the pressing plate.

Through adopting above-mentioned technical scheme, through the corresponding setting of elastic component, when taking place expend with heat and contract with cold's phenomenon, the stroke of elastic component can take place certain change along with the change of temperature, and the compression amount is corresponding to the change of stroke and takes place certain change promptly. But since the amount of change in the gap between the lock ring and the connecting core is not particularly large (which is determined by the coefficient of thermal expansion of the material), the amount of downward pressure that can be provided by the resilient member does not change significantly.

Preferably, the elastic member is a plate spring, two ends of the plate spring protrude to one side from the middle part to form a protruding part for abutting against the connecting core, and two ends of the plate spring are connected to the locking ring.

Preferably, both ends of the plate spring are bent to one side departing from the protruding direction of the plate spring to form a connecting part, and the locking ring is provided with a limiting part limited between the connecting parts at both ends of the plate spring.

By adopting the technical scheme, the mode facilitates the installation of the plate spring, simplifies the structure and reduces the production cost.

Preferably, the locking ring is provided with a connecting groove for the connecting part to penetrate through, and the limiting part is formed between the adjacent connecting grooves.

Through adopting above-mentioned technical scheme, after the leaf spring is compressed, the connecting portion at both ends can outwards expand and keep away from spacing portion, and this kind of mode can make the leaf spring after being compressed can be further spacing by the spread groove to be difficult to take place dislocation and skew.

Preferably, the base plate or the pressing plate is correspondingly provided with accommodating grooves for the protruding parts of the plate spring to penetrate through, and the accommodating grooves and the locking protruding parts are arranged in a staggered mode in the moving direction of the locking ring.

Through adopting above-mentioned technical scheme, the setting of holding tank can be used for holding the leaf spring for under the unblock state, bare fiber and continuous the breaking away from that can be comparatively convenient between connecing the core.

Preferably, when the plate spring is inserted into the accommodating groove, the plate spring is in an original state.

Through adopting above-mentioned technical scheme for when the holding tank was worn to locate to the leaf spring, the leaf spring can not exert down force to connecting the core, thereby makes optic fibre can insert and take out from continuing to connect the core unimpededly.

Preferably, the locking convex part and the elastic part are positioned on two sides of the connecting core, which are opposite to each other.

By adopting the technical scheme, the contact stability of the elastic piece and the connecting core is improved, so that the reliability of splicing the optical fiber by the splicing core is improved to a certain extent.

In a second aspect, the present application provides an optical fiber quick connector, which adopts the following technical solutions:

a fiber optic quick connector comprising:

a casing sheath having a cavity penetrating one axial end;

the coupling sleeve is sleeved and connected outside one end of the pipe shell sheath; and

the splicing core is axially connected in the shell jacket and is positioned in the cavity.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the variation of the temperature change to the downward pressure is small;

2. simple structure and convenient production.

Drawings

FIG. 1 is a schematic diagram of a fiber optic quick connector.

Fig. 2 is an exploded view of a fiber optic quick connector.

FIG. 3 is an exploded view of the splice core.

FIG. 4 is a cross-sectional view of a fiber optic quick connector.

Figure 5 is a cross-sectional view of one embodiment of a leaf spring mated with a locking ring.

Figure 6 is a cross-sectional view of another embodiment of a leaf spring mated with a locking ring.

Description of reference numerals: 1. a pipe shell sheath; 2. a coupling sleeve; 3. splicing the core; 4. a tail sleeve; 5. a tail clip; 6. a compression spring; 31. a connecting core; 32. a locking ring; 311. a substrate; 312. pressing a plate; 313. a splicing groove; 314. a locking projection; 33. a plate spring; 331. a projection; 332. a connecting portion; 321. a limiting part; 322. connecting grooves; 315. accommodating grooves; 316. a plug seat; 317. a tailstock; 34. inserting a core; 35. pre-burying an optical fiber; 318. mounting grooves; 11. disassembling the groove; 21. a communicating groove.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses an optical fiber quick connector. Referring to fig. 1 and 2, the optical fiber splicing device comprises a shell jacket 1, a coupling sleeve 2, a splicing core 3 and a tail sleeve 4, wherein the coupling sleeve 2 is sleeved and connected outside one end of the shell jacket 1 to connect a connector with a corresponding interface, the splicing core 3 is axially connected in a cavity of the shell jacket 1 in a floating mode and used for splicing bare fibers, and one end of the splicing core 3 is provided with a compression spring 6 to apply certain axial thrust to the splicing core 3. One side of the tube shell jacket 1, which is far away from the splicing core 3, is constructed into a tail clamp 5 type structure for clamping an optical fiber cable sheath and is connected with a tail sleeve 4, after the cable sheath with the fixed length is stripped, the connector is plugged into the tail clamp 5 of the tube shell jacket 1, and the splicing core 3 for inserting the bare fiber into the tube shell jacket 1 is spliced. The bare fiber refers to a part of the cable which is stripped of the sheath and the protective layer, namely a fiber core positioned in the central area and a cladding positioned outside the fiber core.

Referring to fig. 2 and 3, the splicing core 3 includes a connecting core 31 for splicing the bare fiber and a lock ring 32 slidably sleeved outside the connecting core 31, and the connecting core 31 can clamp and fix the bare fiber or the bare fiber can freely move relative to the connecting core 31 as the lock core slides along the axial direction of the connecting core 31. Specifically, the connecting core 31 includes a substrate 311 disposed around the bare fibers and a pressing plate 312 covering the substrate 311, the substrate 311 is provided with a splicing groove 313 for the bare fibers to penetrate through, at least one of the back sides of the substrate 311 and the pressing plate 312 is provided with a locking protrusion 314, and the length of the locking protrusion 314 is shorter than the length of the substrate 311 and the pressing plate 312. Therefore, on the sliding track of the locking ring 32, the overall thickness of the connecting core 31 may vary with the arrangement of the locking protrusion 314, and when the locking ring 32 slides out of the connecting core 31, taking the illustration as an example, the locking protrusion 314 is located on the pressure plate 312, but as an alternative embodiment, the locking protrusion 314 may also be located on the substrate 311 or on both sides of the substrate 311 opposite to the pressure plate 312, but when the locking protrusion 314 is located on both sides of the substrate 311 opposite to the pressure plate 312, it needs to be ensured that the locking protrusion 314 cooperates with the locking ring 32 during the sliding process of the locking ring 32 to press the substrate 311 and the pressure plate 312 toward the center, that is, the pressure plate 312 applies a corresponding downward pressure to the substrate 311.

Referring to fig. 3 and 4, an elastic member abutting against the connection core 31 is connected to the lock ring 32 at least one of the back sides of the base plate 311 and the pressing plate 312, and is compressed when the lock ring 32 slides outside the locking protrusion 314, so that the lock ring 32 provides a corresponding elastic force to the connection core 31 through the elastic member to have a pressing tendency of the base plate 311 and the pressing plate 312 to approach each other.

Specifically, the elastic member is a plate spring 33, the two ends to the middle of the plate spring 33 protrude to one side to form a protrusion 331 for abutting against the connecting core 31, the two ends of the plate spring 33 are connected to the locking ring 32, and the distance between the protrusion 331 and the locking ring 32 gradually decreases from the middle to the two ends. When the protrusion 331 is compressed, the two ends of the plate spring 33 are extended outward accordingly and the plate spring 33 is deformed to have a certain elastic force. Both ends of the plate spring 33 are bent to a side away from the protruding direction of the plate spring 33 and form connecting portions 332, and the locking ring 32 has a stopper portion 321 for stopping between the connecting portions 332 at both ends of the plate spring 33.

In an embodiment, referring to fig. 4 and 5, the locking ring 32 is directly formed in a ring shape and has a width smaller than the distance between the connecting portions 332 at both sides of the plate spring 33, so that one side wall of the locking ring 32 is directly provided as the stopper portion 321, and in this embodiment, both ends of the plate spring 33 can be freely expanded without being restricted, so that the distance between the connecting portions 332 and the stopper portion 321 is continuously increased.

In one embodiment, referring to fig. 4 and 6, the locking ring 32 is correspondingly provided with two connecting slots 322 for the connecting portion 332 to pass through, and the area between the two connecting slots 322 forms the limiting portion 321, but the distance between two opposite side walls of the connecting slots 322 needs to be slightly larger than the distance between the two connecting portions 332 to allow the plate spring 33 to expand to a certain extent during the deformation process. However, the two ends of the plate spring 33 are limited by the width of the connecting slots 322, and after the two ends of the plate spring 33 are respectively abutted to the slot walls of the connecting slots 322 at the two sides, the plate spring 33 cannot be pressed to expand outward, and the protrusion 331 can still be pressed to generate corresponding deformation, and under the same pressing stroke, the smaller the expanding stroke of the two ends of the plate spring 33 is, the larger the elastic force can be provided correspondingly.

In this embodiment, when the plate spring 33 is pressed, a good spacing strength between the plate spring 33 and the locking ring 32 can be ensured. When the connecting portions 332 at both ends are respectively abutted against the groove walls of the connecting groove 322, it is ensured that the plate spring 33 and the lock ring 32 do not slide relative to each other. The amount of staggering that can occur between the leaf spring 33 and the lock ring 32 is also determined by the opposing groove walls of the two side connecting grooves 322, provided that the connecting portion 332 does not interfere with the groove walls of the connecting grooves 322.

In the present embodiment, as the locking ring 32 slides to the outside of the locking protrusion 314, the overall thickness between the substrate 311 and the pressing plate 312 increases due to the constant distance between the two side walls of the locking ring 32, so that the distance between the plate spring 33 decreases, and the plate spring 33 is compressed and deformed, and at the same time, the elastic force of the plate spring 33 is converted into the pressing force of the pressing plate 312 against the substrate 311.

In addition to the above configuration, when the ambient temperature changes, the substrate 311, the platen 312, and the lock ring 32 simultaneously expand with heat and contract with cold. With the conventional locking manner, in which the pressing force of the pressing plate 312 against the base plate 311 is directly achieved by the interference fit between the locking protrusion 314 and the locking ring 32, after the expansion and contraction of heat occur, the interference between the locking ring 32 and the connecting core 31 may change, and at the same time, the locking ring 32 may deform in preference to the change in temperature of the connecting core 31 due to the effect of heat conduction. As the amount of interference varies, the downward pressure that lock ring 32 can provide against pressure plate 312 also varies to a greater extent.

On the other hand, due to the corresponding arrangement of the plate spring 33, when the phenomenon of expansion with heat and contraction with cold occurs, the stroke of the plate spring 33 changes with the temperature, that is, the compression amount changes with the stroke. However, since the amount of change in the gap between the lock ring 32 and the connecting core 31 is not particularly large (which is determined by the coefficient of thermal expansion of the materials), the downward pressure provided by the plate spring 33 does not change significantly, and the interference fit is particularly sensitive to the change in the gap.

Therefore, when the splicing core 3 based on the structure is applied in a low-temperature environment or a high-temperature environment, the downward pressure provided by the pressing plate 312 to the substrate 311 basically does not fluctuate to a large extent, and accordingly, the bare fiber tension correspondingly generated based on the structure does not fluctuate to a large extent. The bare fiber tension refers to the tension required for loosening the bare fiber when only the bare fiber is connected with the splicing core 3.

Further, two plate springs 33 may be correspondingly disposed, and are connected to two opposite side plates of the locking ring 32 in a one-to-one correspondence. Taking the example that the plate spring 33 and the locking protrusion 314 are both provided with one, the plate spring 33 and the locking protrusion 314 are preferably distributed on the opposite sides of the connecting core 31. As an alternative embodiment, the plate spring 33 and the locking protrusion 314 may be located on the same side of the coupling core 31.

In addition, a receiving groove 315 through which the protrusion 331 of the plate spring 33 is inserted is correspondingly provided on the base plate 311 or the pressing plate 312, and the receiving groove 315 and the locking protrusion 314 are arranged in a staggered manner in the moving direction of the locking ring 32. When the plate spring 33 is inserted into the receiving groove 315, the plate spring 33 is in the original state and does not apply a downward force to the connecting core 31. And the disposition position of the receiving groove 315 is associated with the position of the plate spring 33. That is, when the lock ring 32 is positioned outside the locking protrusion 314, the receiving groove 315 is provided on the base plate 311 when the protrusion 331 of the plate spring 33 abuts against the base plate 311, and the receiving groove 315 is correspondingly provided on the pressing plate 312 when the protrusion 331 of the plate spring 33 abuts against the pressing plate 312.

Referring to fig. 3 and 4, the two ends of the substrate 311 are respectively and integrally provided with the ferrule holder 316 and the tail base 317, the ferrule holder 316 and the tail base 317 are respectively provided with a through hole passing through in the axial direction, and the through holes of the ferrule holder 316 and the tail base 317 are respectively and gradually reduced in aperture towards the direction close to the substrate 311 along the two ends, so that the bare fiber can be more accurately guided into the continuous groove 313 on the substrate 311 in the blind insertion process. The ferrule 34 is fixedly inserted into the ferrule holder 316, the embedded fiber 35 inserted into the splicing groove 313 is embedded in the ferrule 34, and the embedded fiber 35 can freely slide in the axial direction relative to the ferrule 34. The ferrule 34 may be made of ceramic, glass, plastic, or metal, and is used to support the optical fiber inserted and fixed therein. In a preferred embodiment, the ferrule 34 is made of a ceramic material. The ferrule holder 316 is provided with a mounting groove 318 for mounting the ferrule 34, and the ferrule 34 is inserted into the mounting groove 318 and fixed relative to the ferrule holder 316 by epoxy or other adhesive. The ferrule 34 may be fixed to the ferrule holder 316 before shipment or may be fixed again at the time of field installation.

In the process of splicing the optical fiber connector, the lock ring 32 is separated from the locking convex part 314, the bare fiber is inserted between the substrate 311 and the pressing plate 312 from the tailstock 317 and is inserted into the splicing groove 313 until the bare fiber is abutted to the embedded optical fiber 35 in the splicing groove 313, and then the lock ring 32 is moved to press the bare fiber and the embedded optical fiber 35 through the substrate 311 and the pressing plate 312.

Referring to fig. 2 and 4, a removal groove 11 extending along the sliding direction of the lock ring 32 is further formed through the exterior of the cartridge case 1, and a communication groove 21 communicating with the removal groove 11 is also formed in the coupling sleeve 2, so that the lock ring 32 can be directly applied with force from the outside to move the lock ring 32.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The elastic locking splicing core is characterized by comprising a connecting core (31) for splicing bare fibers and a locking ring (32) which is sleeved outside the connecting core (31) in a sliding manner; the connecting core (31) comprises a substrate (311) distributed on the peripheral side of the bare fiber and a pressing plate (312) covered on the substrate (311), at least one of the back sides of the substrate (311) and the pressing plate (312) is provided with a locking convex part (314), and an elastic part abutted against the connecting core (31) is connected to the locking ring (32) and positioned on at least one of the back sides of the substrate (311) and the pressing plate (312).

2. The resiliently locked splice core of claim 1, wherein: the elastic piece is a plate spring (33), a protruding part (331) used for being abutted with the connecting core (31) is formed by protruding two ends to the middle part of the plate spring (33) towards one side, and two ends of the plate spring (33) are connected to the locking ring (32).

3. The resiliently locked splice core of claim 2, wherein: the two ends of the plate spring (33) are bent to one side departing from the protruding direction of the plate spring (33) to form connecting parts (332), and the locking ring (32) is provided with a limiting part (321) limited between the connecting parts (332) at the two ends of the plate spring (33).

4. A resiliently locking splice core as claimed in claim 3, wherein: the lock ring (32) is provided with connecting grooves (322) for the connecting part (332) to penetrate through, and the limiting part (321) is formed between every two adjacent connecting grooves (322).

5. The resiliently locked splice core of claim 2, wherein: the base plate (311) or the pressure plate (312) is correspondingly provided with an accommodating groove (315) for the protruding part (331) of the plate spring (33) to penetrate through, and the accommodating groove (315) and the locking protruding part (314) are arranged in a staggered mode in the moving direction of the locking ring (32).

6. The resiliently locked splice core of claim 5, wherein: when the plate spring (33) is arranged in the accommodating groove (315) in a penetrating mode, the plate spring (33) is in an original state.

7. An elastically locked splicing core according to any one of claims 1 to 6, wherein: the locking convex part (314) and the elastic part are positioned on two sides of the connecting core (31) which are opposite.

8. A fiber optic quick connector, comprising:

the pipe shell jacket (1) is provided with a cavity penetrating through one axial end;

the coupling sleeve (2) is sleeved and connected outside one end of the pipe shell sheath (1); and

the splicing core (3) according to any of claims 1 to 7, said splicing core (3) being axially connected in the cartridge jacket (1) and located in the cavity.