CN111880264A - Optical fiber connector free of crimping structure - Google Patents

Abstract

The invention relates to an optical fiber movable connector without a compression structure, which comprises an inner sleeve, a connecting sleeve, an outer sleeve, a ceramic contact pin and a protective sleeve; the connecting sleeve comprises a first shaft section connected with the inner sleeve and a second shaft section connected with the protective sleeve, a step hole on the front side of the first shaft section is communicated with a through hole of the second shaft section, the first shaft section is clamped in a rear mounting hole of the inner sleeve, and the second shaft section is clamped in a front mounting hole of the protective sleeve; the ceramic contact pin is arranged between the inner sleeve and the connecting sleeve, two ends of a spring sleeved on a contact pin tail handle respectively prop against a groove tail seat of the ceramic contact pin and a ring table of a step hole of the connecting sleeve, the single-core optical fiber is fixed in a core hole of the plug base, aramid fiber and sheath of the optical cable are fixed in a fixing hole through epoxy resin glue, and the optical cable penetrates out of the connecting sleeve and the protective sleeve; the outer sleeve is sleeved on the inner sleeve and is screwed on the internal thread hole of the protective sleeve. The invention has reasonable structure and good assembly process, can improve the assembly efficiency, reduce the assembly failure rate and has safe and reliable operation.

Description

Optical fiber connector free of crimping structure

Technical Field

The invention relates to an optical fiber movable connector of a compression-free structure, belonging to the technical field of optical fiber connectors on optical communication devices.

Background

The optical fiber connector is a passive optical device which constitutes the most used optical fiber communication system, and is a device for detachably connecting optical fibers, wherein two end faces of the optical fibers are precisely butted, so that the optical energy output by the transmitting optical fiber can be coupled into the receiving optical fiber to the maximum extent, and the influence on the system caused by the optical fiber connector intervening in an optical link is minimized.

The optical fiber connector generally comprises a ceramic contact pin, a connecting sleeve, a spring, an inner sleeve, a protecting sleeve and the like, wherein during assembly, a single-core optical fiber of the stripped optical cable is arranged in a core hole of the ceramic contact pin for solidification, the ceramic contact pin is arranged between the connecting sleeve and the inner sleeve, and the optical cable part with aramid fiber and the optical cable without stripping penetrate out of the ceramic contact pin and the connecting sleeve, so that the optical cable finally meets the pulling phenomenon of a user in the construction process, and the phenomenon of fiber breakage is avoided in the construction process. A structure is fixed the aramid fiber that the cable was opened and is shelled at the rear portion of adapter sleeve with the pressure equipment of big pressure pipe, fixes the cable crust at the rear portion of big pressure pipe with another little pressure pipe crimping again, so fixes the optical cable on the connector. This structure need use two crimping pipes, need use the press-connection machine to carry out the crimping to it in the assembling process. The other structure is that a plurality of fastener holes are arranged on the connecting sleeve along the length direction, the pressing claws at two sides of the metal fastener penetrate through the fastener holes on the connecting sleeve, and the metal fastener is pressed by the pressing machine to fix the cable sheath. All need adopt crimping technology to carry out fixed connection to the optical cable in the current fiber connector assembling process, not only the structure is loaded down with trivial details, still can increase man-hour cost and equipment cost, and crimping technology also has certain equipment defective rate simultaneously, can not further promote the packaging efficiency, and especially each part volume of optic fibre swing joint is less, adopts press crimping to cause staff's operation wounded easily, has certain operation safety risk.

Disclosure of Invention

The invention aims to provide the optical fiber connector with the crimping-free structure, which has the advantages of reasonable structure, good assembly process, capability of improving the assembly efficiency and reducing the assembly failure rate, and safe and reliable operation.

The technical scheme for achieving the aim of the invention is as follows: the utility model provides an optical fiber connector of crimping structure exempts from which characterized in that: comprises an inner sleeve, a connecting sleeve, an outer sleeve, a ceramic contact pin and a protecting sleeve;

the inner sleeve comprises a front limiting hole, a stop shoulder and a rear mounting hole, the front limiting hole is used for being matched with the adapter in butt joint, the stop shoulder is used for limiting the slotted tail seat, and the rear mounting hole is used for being connected with the connecting sleeve;

the connecting sleeve comprises a first shaft section connected with the inner sleeve and a second shaft section connected with the protective sleeve, a step hole on the front side of the first shaft section is communicated with a through hole of the second shaft section, the first shaft section is clamped in a rear mounting hole of the inner sleeve, and the second shaft section is clamped in a front mounting hole of the protective sleeve;

the ceramic contact pin comprises a plug base fixed to a single-core optical fiber of the optical cable and a contact pin tail handle fixed to aramid fiber and a sheath of the optical cable, a groove tail seat is located at the rear part of the plug base, the ceramic contact pin is arranged between an inner sleeve and a connecting sleeve, one end of a spring sleeved on the contact pin tail handle is propped against the groove tail seat of the ceramic contact pin, the other end of the spring is propped against a ring table of a step hole of the connecting sleeve, the single-core optical fiber is fixed in a core hole of the plug base, a fixing hole larger than the core hole is formed in the contact pin tail handle, the aramid fiber and the sheath of the optical cable are fixed in the fixing hole through epoxy resin glue;

the outer sleeve comprises an outer convex block which is clamped with the adapter during butt joint and an inner threaded hole which is connected with the protective sleeve, and the outer sleeve is sleeved on the inner sleeve and is screwed on the inner threaded hole of the protective sleeve.

The optical fiber connector with the crimping-free structure is respectively connected with the inner sleeve and the protective sleeve through the connecting sleeves, the outer sleeve is arranged on the outer side of the protective sleeve, and during assembly, the optical cable sheath and the stripped aramid fiber directly penetrate into the ceramic contact pin tail handle and are fixed in the fixing holes through epoxy resin glue, so that the aramid fiber in the optical cable and the optical cable sheath are fixed. The invention improves the structure of the optical fiber movable connector, has reasonable structure, cancels two crimping pipes, reduces the cost and equipment cost in processing by subtracting the crimping procedure in the production process, can improve the assembly efficiency of the optical fiber connector, simultaneously reduces the unqualified rate of assembly, ensures the stability of the product quality, optimizes the assembly process, saves labor and material cost and reduces the probability of safety accidents.

Drawings

Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of an optical fiber connector of a crimp-free structure according to the present invention.

Fig. 2 is a schematic structural view of the connecting sleeve of the invention.

Fig. 3 is a schematic sectional structure view of a-a of fig. 2.

Fig. 4 is a schematic perspective view of the connecting sleeve of the present invention.

FIG. 5 is a schematic structural diagram of a ceramic ferrule according to the present invention.

Fig. 6 is a schematic sectional structure view of B-B of fig. 5.

Wherein: 1-dustproof cap, 2-ceramic contact pin, 2-1-plug base, 2-11-core hole, 2-grooved tailstock, 2-3-contact pin caudal handle, 2-31-fixing hole, 3-inner sleeve, 3-1-shoulder, 3-2-first lug, 3-front limiting hole, 3-4-rear mounting hole, 4-outer sleeve, 4-1-outer lug, 4-2-inner threaded hole, 5-spring, 6-connecting sleeve, 6-1-step hole, 6-2-front clamping groove, 6-3-limiting convex ring, 6-4-rear annular groove, 6-5-convex ring, 7-protective sleeve, 7-1-second lug, 8-optical cable, 8-1-single-core optical fiber.

Detailed Description

Referring to fig. 1, the optical fiber connector with a crimp-free structure of the present invention includes aninner sleeve 3, a connectingsleeve 6, anouter sleeve 4, aceramic ferrule 2 and asheath tube 7.

As shown in figure 1, theinner sleeve 3 comprises a front limiting hole 3-3 used for matching with the adapter in butt joint, a stop shoulder 3-1 used for limiting a groove tailstock 2-2 and a rear mounting hole 3-4 used for connecting with a connectingsleeve 6, and theinner sleeve 3 is limited with the adapter in butt joint and is clamped and fixed by an outer convex block 4-1 on anouter sleeve 4, so that the butt joint performance is prevented from being influenced by displacement of the connector. As shown in figure 1, the dustproof cap 1 of the invention is tightly sleeved on theceramic contact pin 2 and extends into theinner sleeve 3 and is limited by the retaining shoulder 3-1, and the end face of theceramic contact pin 2 is protected from being polluted by dust and water vapor in the air by the dustproof cap 1.

As shown in the figures 1-4, the connectingsleeve 6 comprises a first shaft section connected with theinner sleeve 3 and a second shaft section connected with theprotective sleeve 7, a step hole 6-1 on the front side of the first shaft section is communicated with a through hole of the second shaft section, the first shaft section is clamped in a rear mounting hole 3-4 of theinner sleeve 3, the second shaft section is clamped in a front mounting hole of theprotective sleeve 7, so that the connectingsleeve 6 is respectively connected with theinner sleeve 3 and the protective sleeve, theceramic contact pin 2 is fixed, a certain pressure is provided for thespring 5, and thespring 5 is ensured to be always in a stressed state.

As shown in fig. 1 to 4, the connectingsleeve 6 of the present invention includes a limit protruding ring 6-3 for axially limiting theinner sleeve 3 and thesheath tube 7, such that one surface of the limit protruding ring 6-3 is connected to thesheath tube 7 to axially limit thesheath tube 7, meanwhile, the other side of the limiting convex ring 6-3 limits theinner sleeve 3 axially, the connectingsleeve 6 is divided into a first shaft section and a second shaft section by the limiting convex ring 6-3, a front clamping groove 6-2 is arranged on the first shaft section, a rear annular groove 6-4 is arranged on the second shaft section, a first lug 3-2 extending inwards from a rear mounting hole 3-4 of theinner sleeve 3 is clamped in the front clamping groove 6-2, the front clamping groove 6-2 and the first lug 3-2 are symmetrically arranged, and the second lug 7-1 at the front part of the front mounting hole of theprotective sleeve 7 is clamped in the rear ring groove 6-4, and theinner sleeve 3 and theprotective sleeve 7 are connected to the connectingsleeve 6. As shown in the figures 1-4, a plurality of convex rings 6-5 are arranged at intervals at the rear part of the rear annular groove 6-4 of the connectingsleeve 6, knurling is arranged on the surface of each convex ring 6-5, the diameter of each convex ring 6-5 is smaller than that of the rear annular groove 6-4, a front mounting hole of the protectingsleeve 7 is tightly connected with the convex ring 6-5, and the friction force between the protectingsleeve 7 and theinner sleeve 3 is increased, so that the protectingsleeve 7 is not easy to fall off after being assembled.

As shown in figures 1, 5 and 6, theceramic contact pin 2 comprises a plug base 2-1 fixed on a single-core optical fiber 8-1 of anoptical cable 8 and a contact pin tail handle 2-3 fixed on aramid fiber and outer skin of the optical cable, a groove tail base 2-2 is positioned at the rear part of the plug base 2-1, theceramic contact pin 2 is arranged between aninner sleeve 3 and a connectingsleeve 6, one end of aspring 5 sleeved on the contact pin tail handle 2-3 is propped against the groove tail base 2-2, the other end of thespring 5 is propped against a ring platform of a step hole 6-1 of the connectingsleeve 6, and thespring 5 is always in a stressed state, so that a certain force is applied to theceramic contact pin 2, the two contact pins can be more fully contacted when the connector is butted, and the optical performance is ensured to be. The optical fiber core is fixed in a core hole 2-11 of a plug base 2-1, a fixing hole 2-31 larger than the core hole 2-11 is arranged in a pin tail handle 2-3, aramid fiber and an optical cable sheath stripped from anoptical cable 8 are fixed in the fixing hole 2-31 through epoxy resin glue, the aramid fiber and the optical cable sheath stripped can directly penetrate into the pin tail handle 2-3 of aceramic pin 2 during assembly, and are fixed by 353ND epoxy resin glue, so that the tensile property can be ensured, and theoptical cable 8 penetrates out of a connectingsleeve 6 and aprotective sleeve 7. As shown in figure 1, a plug base 2-1 of aceramic contact pin 2 is arranged in aninner sleeve 3, a contact pin tail handle 2-3 of theceramic contact pin 2 penetrates through a stepped hole 6-1 of a connectingsleeve 6, and a gap between a small hole of the stepped hole 6-1 and the contact pin tail handle 2-3 is 0.1 +/-0.05 mm, so that the gap between theceramic contact pin 2 and the connectingsleeve 6 is further prevented, and the radial displacement phenomenon of theceramic contact pin 2 is reduced.

As shown in figure 1, theouter sleeve 4 comprises an outer lug 4-1 which is clamped with the adapter during butt joint and an inner threaded hole 4-2 which is connected with theprotective sleeve 7, theouter sleeve 4 is sleeved on theinner sleeve 3 and is screwed on theprotective sleeve 7, theouter sleeve 4 is connected with theprotective sleeve 7, and theoptical cable 8 at the tail part is protected to prevent theoptical cable 8 from being broken due to bending. As shown in figure 1, the front end face of theouter sleeve 4 is flush with the front end face of theinner sleeve 3, or the front end face of theouter sleeve 4 exceeds the front end face of theinner sleeve 3, and the rear end face of theouter sleeve 4 exceeds the rear end face of the connectingsleeve 6, so that theouter sleeve 4 is clamped and fixed when being in butt joint with an adapter, and is convenient to pull out, and the connector is prevented from displacing to influence the butt joint performance.

Claims (6)

1. The utility model provides an optical fiber connector of crimping structure exempts from which characterized in that: comprises an inner sleeve (3), a connecting sleeve (6), an outer sleeve (4), a ceramic contact pin (2) and a protective sleeve (7);

the inner sleeve (3) comprises a front limiting hole (3-3) used for being matched with the adapter in butt joint, a retaining shoulder (3-1) used for limiting the groove tailstock (2-2) and a rear mounting hole (3-4) used for being connected with the connecting sleeve (6);

the connecting sleeve (6) comprises a first shaft section connected with the inner sleeve (3) and a second shaft section connected with the protective sleeve (7), a step hole (6-1) in the front side of the first shaft section is communicated with a through hole of the second shaft section, the first shaft section is clamped in a rear mounting hole (3-4) of the inner sleeve (3), and the second shaft section is clamped in a front mounting hole of the protective sleeve (7);

the ceramic contact pin (2) comprises a plug base (2-1) for fixing single-core optical fibers of the optical cable and a contact pin tail handle (2-3) for fixing aramid fibers and outer skins of the optical cable, a groove tail base (2-2) is positioned at the rear part of the plug base (2-1), the ceramic contact pin (2) is arranged between an inner sleeve (3) and a connecting sleeve (6), one end of a spring (5) sleeved on the contact pin tail handle (2-3) is propped against the groove tail base (2-2) of the ceramic contact pin (2), the other end of the spring is propped against a ring platform of a step hole (6-1) of the connecting sleeve (6), the single-core optical fibers are fixed in a core hole of the plug base (2-1), a fixing hole (2-31) larger than the core hole (2-21) is formed in the contact pin tail handle (2-3), the aramid fibers and the outer skins of the optical cable are fixed in the fixing hole (2-31) through, the optical cable penetrates out of the connecting sleeve (6) and the protecting sleeve (7);

the outer sleeve (4) comprises an outer convex block (4-1) which is connected with the adapter in a clamping mode during butt joint and an inner threaded hole (4-2) connected with the protective sleeve (7), and the outer sleeve (4) is sleeved on the inner sleeve (3) and is screwed on the protective sleeve (7).

2. The optical fiber connector of claim 1, wherein: the connecting sleeve (6) comprises a limiting convex ring (6-3) used for axially limiting the inner sleeve (3) and the protective sleeve (7), the limiting convex ring (6-3) divides the connecting sleeve (6) into a first shaft section and a second shaft section, a front clamping groove (6-2) is arranged on the first shaft section, a rear annular groove (6-4) is arranged on the second shaft section, a first lug (3-2) extending in a rear mounting hole (3-4) of the inner sleeve (3) is clamped in the front clamping groove (6-2), and a second lug (7-1) at the front part of the mounting hole of the protective sleeve (7) is clamped in the rear annular groove (6-4).

3. The optical fiber connector of claim 2, wherein: the connecting sleeve (6) is provided with a plurality of convex rings (6-5) at intervals at the rear part of the rear ring groove (6-4), the surface of each convex ring (6-5) is provided with a knurl, and the front mounting hole of the protective sleeve (7) is tightly connected with the convex rings (6-5).

4. The optical fiber connector of claim 1, wherein: the front end face of the outer sleeve (4) is flush with the front end face of the inner sleeve (3), or the front end face of the outer sleeve (4) exceeds the front end face of the inner sleeve (3), and the rear end face of the outer sleeve (4) exceeds the rear end face of the connecting sleeve (6).

5. The optical fiber connector of claim 1, wherein: the plug base (2-1) of the ceramic contact pin (2) is arranged in the inner sleeve (3), the contact pin tail handle (2-3) of the ceramic contact pin (2) penetrates through the stepped hole (6-1) of the connecting sleeve (6), and the gap between the small hole of the stepped hole (6-1) and the contact pin tail handle (2-3) is 0.1 +/-0.05 mm.

6. The optical fiber connector of claim 1, wherein: the dustproof cap (1) is tightly sleeved on the ceramic contact pin (2), extends into the inner sleeve (3) and is limited by the retaining shoulder (3-1).

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