EP0052014A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Optical fiber connector and method of producing same
Assignee: Hitachi Ltd
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Filing: 1981-11-10
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Granted: —
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Expires: 2001-11-10
Abstract
Abstract An optical fiber connector (5) comprising a pair of plugs (6), a sleeve (10) and a pair of cap nuts (15) which is assembled at the site where optical fibers are installed, so as to connect the optical fibers with a high degree of positional accuracy. The plugs and the sleeve are molded of a composition including a synthetic resin added with a suitable content of a filler, such as glass beads.
Inventors
- 👤 Hidemi Sato
- 👤 Aizo Kaneda
- 👤 Hitoshi Yokono
- 👤 Atsuyoshi Ohashi
- 👤 Kouohide Miyake
- 👤 Toshiro Kodama
- 👤 Kiichi Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 18:33
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/36; G02B6/38; G02B6/3807; G02B6/381; G02B6/3825; G02B6/3833; G02B6/3865; G02B6/3863
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
170 words
.In an optical fiber connector comprising a plug adhesively attached to an end of an optical fiber cable, a sleeve threaded at either end of an outer peripheral surface thereof and adapted to have said plug inserted from opposite ends into a center axis portion thereof, a cap nut threaded at one end of an inner peripheral surface thereof for fixing the plug to the sleeve, and a spring mounted on an outer peripheral portion of the plug so as to be located between the plug and the cap nut, the improvement wherein said plug is formed of a synthetic resin by using a mold including a core for defining a forward end of the plug having a core pin of a larger than the optical fiber by 1 to several µm attached to said core and adapted to be abutted at one end by another core extending from the other side, so that the plug and the sleeve can be formed of a synthetic resin of the same composition.
Claim 2
Dependent Claim
170 words
.In an optical fiber connector comprising a plug adhesively attached to an end of an optical fiber cable, a sleeve threaded at either end of an outer peripheral surface thereof and adapted to have said plug inserted from opposite ends into a center axis portion thereof, a cap nut threaded at one end of an inner peripheral surface thereof for fixing the plug to the sleeve, and a spring mounted on an outer peripheral portion of the plug so as to be located between the plug and the cap nut, the improvement wherein said plug is formed of a synthetic resin by using a mold including a core for defining a forward end of the plug having a core pin of a larger than the optical fiber by 1 to several µm attached to said core and adapted to be abutted at one end by another core extending from the other side, so that the plug and the sleeve can be formed of a synthetic resin of the same composition.
Claim 3
Dependent Claim
45 words
An optical fiber connector as claimed in claim 1, wherein the synthetic resin composition molding said plug and said sleeve comprises polycarbonate, and one of glass beads, glass balloons and silica glass in particle form added to the polycarbonate in 10-30 wt% as a filler.
Claim 4
Dependent Claim
52 words
An optical fiber connector as claimed in claim 1, wherein the synthetic resin composition molding said plug and said sleeve comprises an epoxy resin, and one of glass beads, glass balloons and silica glass in particle form added to the epoxy resin in 30-80 wt%, preferably in 50-30 wt%, as a filler.
Claim 5
Dependent Claim
28 words
An optical fiber connecter as claimed in claim wherein said plug has an outer diameter greater than the inner diameter of said sleeve by +3 to -2 µm.
Claim 6
Dependent Claim
35 words
An optical fiber connector as claimed in claim 1, wherein the adhesive agent used for connecting the optical fiber to the plug comprises an epoxy resin base adhesive agent of below 20 poise in viscosity.
Claim 7
Dependent Claim
61 words
An optical fiber connector as claimed in claim 1, wherein the adhesive agent comprises an epoxy resin base adhesive agent of below 20 poise in viscosity added as a filler with 40-60 wt% of alumina or aluminum hydroxide in particle form of mean particle size which is 50-70% of the clearance between an orifice of the plug and the optical fiber.
Claim 8
Dependent Claim
46 words
An optical fiber connector as claimed in claim 1, wherein a glass pipe is inserted into the root of the optical fiber and inserted together with the optical fiber into the plug, to thereby affix the glass pipe to the plug together with the optical fiber.
Claim 9
Dependent Claim
29 words
An optical fiber connector as claimed in claim 2, wherein the composition for molding the plug and the sleeve is added with 5-30 wt% of polytetrafluoroethylene as a lubricant.
Claim 10
Dependent Claim
30 words
An optical fiber connector as claimed in claim 2, wherein the composition for molding the plug and the sleeve is added with 1-5 wt% of molybdenum disulfide as a lubricant.
Claim 11
Dependent Claim
35 words
An optical fiber connector as claimed in claim 3, wherein the composition for molding the plug and the sleeve is added with 1-5 wt% of one of polytetrafluoroethylene, molybdenum disulfide and graphite as a lubricant.
Claim 12
Independent Claim
178 words
A method of producing an optical fiber connector comprising the steps of: removing in a predetermined length each of a secondary coat and a primary coat of an optical fiber cable at one end portion thereof and cleaning the outer peripheries of the exposed portions of the primary coat and an optical fiber with an organic solvent; fitting a cap nut and a spring over the optical fiber at its end portion from which the coats have been removed; introducing a predetermined amount of adhesive agent into an orifice of a plug; inserting the optical fiber cable into the plug until the optical fiber sticks out of the forward end face of the plug before the adhesive agent inserted in the plug sets; and cutting the length of the optical fiber sticking out of the forward end face of the plug after the plug and the optical fiber are affixed to each other as a unit following setting of the adhesive agent and lapping the end faces of the plug and the optical fiber to provide mirror-like surfaces.
Claim 13
Independent Claim
178 words
A method of producing an optical fiber connector comprising the steps of: removing in a predetermined length each of a secondary coat and a primary coat of an optical fiber cable at one end portion thereof and cleaning the outer peripheries of the exposed portions of the primary coat and an optical fiber with an organic solvent; fitting a cap nut and a spring over the optical fiber at its end portion from which the coats have been removed; introducing a predetermined amount of adhesive agent into an orifice of a plug; inserting the optical fiber cable into the plug until the optical fiber sticks out of the forward end face of the plug before the adhesive agent inserted in the plug sets; and cutting the length of the optical fiber sticking out of the forward end face of the plug after the plug and the optical fiber are affixed to each other as a unit following setting of the adhesive agent and lapping the end faces of the plug and the optical fiber to provide mirror-like surfaces.
Claim 14
Dependent Claim
78 words
A method as claimed in claim 11, wherein a mold used for molding the plug comprises a core for defining the forward end face of the plug, a core pin of a diameter larger by 1 to several µm than the diameter of the optical fiber to be connected attached to the center of said core and projecting therefrom, and a movable core extending from the rear end of the plug for abutting one end of said core.
References Cited (Backward Citations)
No citation records indexed.
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