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EP-3722850-B1 - FIBER OPTICAL CONNECTOR

EP3722850B1EP 3722850 B1EP3722850 B1EP 3722850B1EP-3722850-B1

Inventors

  • CUI, YANG-YANG
  • CHANG, YAN-MEI

Dates

Publication Date
20260513
Application Date
20200414

Claims (8)

  1. A fiber optical connector (100), comprising: a connector housing (1) comprising a receiving space (10), wherein one end of the connector housing (1) forms a connector opening (11) communicating with the receiving space (10), and two side walls of the connector housing (1) comprise a plurality of bucking portions (13) adjacent to the connector opening (11), and a length of the connector housing (1) is in a range between 8.9 mm and 13.9 mm or in a range between 15.4 mm and 19.4 mm; an optical-fiber component (2) positioned in the receiving space (10), wherein the optical-fiber component (2) comprises a sleeve piece (21), a base body (241), an insertion pin (242), a connection sleeve (243), the base body (241) is received in the receiving space (10), and the insertion pin (242) and the connection sleeve (243) are respectively assembled with two sides of the base body (241), the sleeve piece (21) comprises a block member (211) and a threaded portion (212), wherein the block member (211) is assembled in the connector opening (11), two sides of the block member (211) respectively form an engaging portion (23), and each of the engaging portions (23) is engaged with the corresponding buckling portion (13), and the threaded portion (212) is integrally formed with the block member (211), and the threaded portion (212) is exposed out of the connector opening (11); a tubular member (27) fitted over the threaded portion (212), and an inner side of the tubular member (27) forms a plurality of barb structures (271); and a tail cap (28) fitted over the tubular member (27); wherein a length of the sleeve piece (21) is in a range between 6.25 mm and 10.25 mm, a length of the tubular member (27) is in a range between 4.5 mm and 8.5 mm, and a length of the tail cap (28) is in a range between 10. 7 mm and 14.7 mm; and a total length (L2) of the fiber connector (100) is in a range between 30 mm and 35 mm, and the total length (L2) is a length between the front end of the insertion pin (242) and the rear end of the tail cap (28).
  2. The fiber optical connector (100) according to claim 1, wherein each of the buckling portions (13) comprises an elastic protruding portion (131), and the elastic protruding portions (131) are formed on the side walls of the connector housing (1); each of the engaging portions (23) comprises a recessed portion (231) formed on a side wall of the sleeve piece (21).
  3. The fiber optical connector (100) according to claim 1, wherein a cross section of the base body (241) is of a geometrical shape, and a cross section of an interior of the connector housing (1) is of a geometrical shape corresponding to the geometrical shape of the cross section of the base body (241).
  4. The fiber optical connector (100) according to claim 1, wherein the optical-fiber component (2) comprises a core component (25) and a spring (26), the core component (25) is fitted over the connection sleeve (243), and the spring (26) is fitted over the core component (25).
  5. The fiber optical connector (100) according to claim1, wherein the length of the sleeve piece (21) is 8.25 mm.
  6. The fiber optical connector (100) according to claim 1, wherein the connector housing (1) comprises an elastic arm (19) obliquely and outwardly extending from an outer surface of the connector housing (1)
  7. The fiber optical connector (100) according to claim 6, further comprising a crimp connection block (3) fitted over the connector housing (1), wherein the crimp connection block (3) comprises an elastic piece (39) obliquely and outwardly extending from an outer surface of the crimp connection block (3) and above the elastic arm (19).
  8. The fiber optical connector (100) according to claim 1, wherein the threaded portion (212) is exposed on the peripheral surface of a tail portion of the sleeve piece (21).

Description

FIELD OF THE INVENTION The instant disclosure relates to a connector, and more particular to a fiber optical connector. BACKGROUND The optical fiber is an tool for optical transmission. In general, a fiber optical connection device includes a female adapter with two ends being inserted by male fiber optical connectors, so that the adapter and the connectors can be fixed with each other, and data transmission can be performed between electronic devices connected through the fiber optical connection device. Background technology is disclosed in US 2013/315540 A1, US 2018/292616 A1, US 20181100972 A1, "LC Product Specification", 30 June 2006, XP 055724859, and Senko: "The New LC mini BOOT" 28 June 2016, XP055724939. SUMMARY OF THE INVENTION Please refer to Figs. 1 and 2. Fig. 1 illustrates an exploded view of a fiber optical connector known to the inventor (called prior-art fiber optical connector), and Fig. 2 illustrates a side cross-sectional view of the prior-art fiber optical connector. The prior-art fiber optical connector A includes a housing B, an optical-fiber component C, a tail cap D, and a pressing member E. The optical-fiber component C comprises, from front to rear, an insertion core C1, a core component C2, a spring C3, a sleeve piece C4, and a sleeve piece C5. The insertion core C1 extends out of one of two ends of the housing B, and the tail cap D is fixed at the other end of the housing B. The sleeve piece C5 has a long sleeve C51 for thermal shrinking (the length of the long sleeve C51 is not counted for the total length of the fiber optical connector A from the front end of the insertion core C1 to the rear end of the tail cap D) and a metallic sleeve C52 at one side of the long sleeve C51. The length of the metallic sleeve C52 is 6.85 mm, and the length of the tail cap D is 28.8 mm. The main body of the sleeve piece C4 is a block. A protruding tubular member C41 (tubular body) extends from one end of the main body of the sleeve piece C4, and a metallic tubular member C43 extends from the other end of the main body of the sleeve piece C4. An outer surface of the protruding tubular member C41 has an engaging block C42. The protruding tubular member C41 is assembled in the housing B, the engaging block C42 is inflexibly engaged with the buckling groove B4 at the side portion of the housing B, and the main body of the sleeve piece C4 is positioned outside the housing B. The length of the sleeve piece C4 is 18.22 mm. After the prior-art fiber optical connector A is assembled, the length from the front end of the insertion core C1 to the rear end of the tail cap D is 45 mm, which is the total length L1 of the prior-art fiber optical connector A. Moreover, it is understood that, the components of the prior-art fiber optical connector A are assembled with each other by inflexible engagement. When the prior-art fiber optical connector A is applied to fix with an optical-fiber cable, the jacket of the optical-fiber cable has to be teared apart, and then a compression ring member and a tubular member are applied to fix the optical-fiber lines and the jacket. Moreover, the interior of the housing B and the insertion core C1 are of a hexagonal shape, with the housing B assembled with the insertion core C1 in a tapered engaging manner. During the metal processing, because of the wear and tear of the processing knives, precisions on the angles of the metallic components of the prior-art fiber optical connector A cannot be controlled properly, resulting in that the components of the prior-art fiber optical connector A cannot be properly mated with each other in a high precision manner. The total length of the prior-art fiber optical connector A is too long to meet the length requirements of the cabinet for 5G network. Moreover, when the fiber optical connector is forcedly assembled, the engaging points and engaging grooves of the assembled connector for providing the substantial structural strength of the assembly are damaged, thereby reducing the structural strength of the assembled connector. Furthermore, because the assembling of the optical-fiber cable with the connector requires the jacket of the optical-fiber cable to be teared apart, thereby reducing the protection effect of the jacket for the optical-fiber lines. Moreover, during the use of the optical-fiber cable, the cable may be pulled apart easily to cause function failure. Furthermore, a cross section of the riveted insertion core is of a hexagonal shape and mated with the housing in a tapered engaging manner. As a result, the connector needs a high precision processing, and components of the finished LC connector cannot meet the high precision connection requirements. In view of these, the invention of the instant disclosure provides a fiber optical connector as defined in claim 1. The fiber optical connector comprises a connector housing, and preferably a crimp connection block, and the optical fiber connector further comprises an optical-fi