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1. 发明专利

JPH08114724A OPTICAL CONNECTOR 失效
公开(公告)号：JPH08114724A
公开(公告)日：1996-05-07
申请号：JP24790394
申请日：1994-10-13
申请人： FURUKAWA ELECTRIC CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： YAMADA HIROYUKI , SUZUKI KENJI , TAKAGI KOICHI , SHIGEMATSU TAKASHI , ISHIHARA MIKITAKE , YAMAKAWA ATSUSHI , NAGASAWA SHINJI
IPC分类号： G02B6/40 , G02B6/38
摘要： PURPOSE: To provide an optical connector which eliminates the need for using a refractive index matching agent at the time of butt connecting to another optical connector, does not generate significant connection loss at the time of butt connection, is simple in structure and is inexpensive. CONSTITUTION: This optical connector 10 is formed by mounting a ferrule 11 having a butt end face 11a at its front part and positioning holes on both sides in a transverse direction at the end of plural optical fibers 12a and is butt connected to another optical connector. The ferrule 11 has a rear part 11d where the positioning holes and the plural optical fibers are arranged in parallel at least near the butt end faces, the arranging surfaces PA of the plural optical fibers and the butt end face 11a are arranged so as not to intersect orthogonally with each other, the intersection lines Li intersected with the butt end face and the arranging surfaces are perpendicular to the axes of the plural optical fibers and pressing force acts approximately perpendicularly on the butt end face when the fibers are pressed by a pressing means in a butt direction.

2. 发明专利

JPH08201657A METAL MOLD FOR ASSEMBLED MULTI-FIBER OPTICAL CONNECTOR 失效
公开(公告)号：JPH08201657A
公开(公告)日：1996-08-09
申请号：JP1149795
申请日：1995-01-27
申请人： FURUKAWA ELECTRIC CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： YAMADA HIROYUKI , TAKAGI KOICHI , SHIGEMATSU TAKASHI , YAMAKAWA ATSUSHI , NAGASAWA SHINJI
IPC分类号： G02B6/38 , B29C33/00 , B29C45/26 , G02B6/40
摘要： PURPOSE: To obtain an assembled frame multi-fiber connector capable of connecting multiple optical fibers with least possible connection loss at high accuracy by adopting constitution to allow the easy formation of grooves by machining in members or planar bodies. CONSTITUTION: This metal mold has a first block body including the first member 11 having housing parts for housing pin holding members, the second member 15 to be placed with the planar body having grooves for fitting pins for fiber holes and a third member 25 having a recessed part 25a constituting a cavity. The metal mold has a second block body including the fourth member to be placed on the second member 15 on which the planar body is placed, the fifth member placed on the first member 11 and the sixth member which is held between the fourth and fifth members and constitutes the cavity with the third member. The metal mold has the pin holding member to be housed in the housing part. The mold has also the planar body for fixing the pins for the fiber holes, molding guide pins 19 to be fitted into the grooves 17 for the molding guide pins and positioning pins 20 to be fitted into the grooves for positioning pins.

3. 发明专利

JPH09203827A OPTICAL CONNECTOR 失效
公开(公告)号：JPH09203827A
公开(公告)日：1997-08-05
申请号：JP2991096
申请日：1996-01-24
申请人： FURUKAWA ELECTRIC CO LTD
发明人： TAKAGI KOICHI , SHIGEMATSU TAKASHI , SHIINO MASAHITO , TANABE ETSUO
IPC分类号： G02B6/24 , G02B6/40
摘要： PROBLEM TO BE SOLVED: To provide a multifiber optical connector which can be manufactured in a short period of time with good operability. SOLUTION: A ferrule 3 is formed having an optical fiber insertion hole 5 and a bare fiber insertion hole 4 and the tip side of the optical fiber insertion hole 5 is a one-side tapered hole 6 which has a bare fiber mount base 10 and a tapered surface 14 and gradually decreases in vertical opening width toward the bare fiber insertion hole 4. A wedge member 8 is inserted into the tapered hole 6 with its fiber holding part 11 on the tip side, and the fiber holding part 11 has a tapered part 12 on its outer peripheral surface corresponding to the tapered surface 14 of the tapered hole 6. A bare optical fiber 9 is clamped between the fiber holding part 11 of the wedge member 8 and the bare fiber mount base 10 and a ribbon 1 of optical fibers is inserted and fixed in the ferrule 3.

4. 发明专利

JPH09203825A MULTIFIBER OPTICAL CONNECTOR 失效
公开(公告)号：JPH09203825A
公开(公告)日：1997-08-05
申请号：JP2990996
申请日：1996-01-24
申请人： FURUKAWA ELECTRIC CO LTD
发明人： SHIGEMATSU TAKASHI , TAKAGI KOICHI , SHIINO MASAHITO , TANABE ETSUO
IPC分类号： G02B6/40
摘要： PROBLEM TO BE SOLVED: To provide a muifiber optical connector which can be manufactured in a short period of time with good operability. SOLUTION: Plural bare fiber insertion holes 6 are formed in the tip side of a ferrule 3, an optical fiber ribbon insertion hole 6 is formed on the base end side of the ferrule 3, and bare optical fibers 9 formed by removing the coating 14 of a ribbon 13 of optical fibers are inserted into the bare fiber insertion holes 8. Openings 2a and 2b whose upper ends are open are formed between the bare fiber insertion holes 8 and optical fiber ribbon insertion hole 6, and fiber parallel bases 5a and 5b in an isolated-land shape are formed at the openings 2a and 2b across their side walls 22 and a space; and the fiber parallel base 5a is provided with plural bare fiber array grooves 16 and the fiber parallel base 5b is provided with plural optical fiber array grooves 25. The bare optical fibers 9 are inserted into the bare fiber array grooves 16 and a fiber pressing member 4a which elastically holds the bare optical fibers 9 by embracing them from above is engaged with only the fiber parallel base 5a.

5. 发明专利

JPH09203824A MULTIFIBER OPTICAL CONNECTOR AND ITS MANUFACTURE 失效
公开(公告)号：JPH09203824A
公开(公告)日：1997-08-05
申请号：JP2990796
申请日：1996-01-24
申请人： FURUKAWA ELECTRIC CO LTD
发明人： SHIGEMATSU TAKASHI , TAKAGI KOICHI , SHIINO MASAHITO , TANABE ETSUO
IPC分类号： G02B6/40
摘要： PROBLEM TO BE SOLVED: To provide a multifiber optical connector which can be manufactured in a short period of time with good operability. SOLUTION: Plural bare fiber insertion holes 8 are formed in the tip side of a ferrule 3, an optical fiber ribbon insertion hole 6 is formed on the base end side of the ferrule 3, and bare optical fibers 9 obtained by removing the covering 14 of a ribbon 13 of optical fibers are inserted into the bare fiber insertion holes 8. A fiber parallel base 5 is provided between the bare fiber insertion holes 8 and optical fiber ribbon insertion hole 6, and the fiber parallel base 5a is provided with bare fiber array grooves 16 communicating with the bare optical fiber insertion holes 8. The bare fiber array grooves 16 are ohm grooves which are sectioned in an inverted-Ωarcuate shape whose center angle is >=180 deg. and the upper-end opening width of the ohm grooves is less than the diameter of a bare optical fiber 9.

6. 发明专利

JPH07168054A OPTICAL CONNECTOR FERRULE 失效
公开(公告)号：JPH07168054A
公开(公告)日：1995-07-04
申请号：JP34181493
申请日：1993-12-13
申请人： FURUKAWA ELECTRIC CO LTD
发明人： KUYAMA HIROKI , TAKAGI KOICHI , IIZUKA KENJI
IPC分类号： G02B6/38
摘要： PURPOSE:To provide an optical connector ferrule with excellent reliability. CONSTITUTION:Regarding an optical connector ferrule having a frange 4 formed near the center part of the outside of an insertion hole body 1 which is composed of mutually communicated small diameter hole part 2 and large diameter hole part 3, wherein into the small diameter hole, a part of an optical fiber from which an optical coated fiber coating is removed is to be inserted and into the large diameter hole, the optical coated fiber part is to be inserted; the outer circumference of a part covering at least from the tip end of the small diameter part 2 of the insertion hole 1 to the part exceeding the flange 4 is formed from a hard material 5. Since the hard material 5 is used to form the part exceeding the flange 4 of the insertion hole 1, the bending strength affecting between the hard material 5 and the flange 4 is dispersed and the hard material 5 is prevented from peeling out of the flange and thus the reliability of the optical connector ferrule is improved.

7. 发明专利

JPH04324413A OPTICAL SWITCH 失效
公开(公告)号：JPH04324413A
公开(公告)日：1992-11-13
申请号：JP12228791
申请日：1991-04-24
申请人： FURUKAWA ELECTRIC CO LTD
发明人： TAKAGI KOICHI , YAMADA HIROYUKI , SHIGEMATSU TAKASHI , ISHIKAWA MASAO
IPC分类号： G02B6/00 , G02B6/38 , G02B6/40 , G02B26/08
摘要： PURPOSE:To shorten the time of connection switching of optical fibers by providing a clearance surface to a positioning pin and making the area of contact with the inner peripheral surface of a positioning hole small, reducing the slide resistance of the positioning pin, and reducing the size of a drive source which drives the positioning pin for entering and exiting and speed up the entering and exiting motion of the positioning pin. CONSTITUTION:Optical fibers 2a-2f each consisting of >=1 coated optical fiber (unit) are arranged in a 1st connector and optical fibers 5a-5f each consisting of >=2 units are arranged in a 2nd connector 4 while exposed to an abutting end surface 3. The 1st connector 1 and 2nd connector 4 are provided with pairs of positioning holes 6 and positioning holes 7. The clearance surface 14 which extends in the length direction is formed on the outer peripheral surface of the positioning pin 12b inserted into the pair of positioning holes 7 at the time of the connection switching of the positioning pin 12a inserted into the pair of the positioning holes 5 and optical fibers.

8. 发明专利

JPH06278141A PLASTIC MOLDING MACHINE 失效
公开(公告)号：JPH06278141A
公开(公告)日：1994-10-04
申请号：JP6793093
申请日：1993-03-26
申请人： FURUKAWA ELECTRIC CO LTD
发明人： TAKAGI KOICHI , YAMADA HIROYUKI , SHIGEMATSU TAKASHI
IPC分类号： B29C33/76 , B29C33/00 , B29C33/22 , B29C45/33 , B29C45/36 , B29D11/00 , G02B6/38 , G02B6/40
摘要： PURPOSE:To provide a plastic molding machine which can mold a highly precise plastics molded product at a low cost in an excellent yield by a method wherein a transfer body is guided so that a molding core does not interfere with a molding tool, and the molding tool is positioned with high precision to restrain damage or the like. CONSTITUTION:A plastic molding machine is provided wherein molding tools 23, 24 are attached by being opposed to each other; a movable side metal mold 20 wherein both molding tools are, in a freelly mutually transferrable manner, arranged in an opening and closing direction and a fixed side metal mold 30 are freely separably arranged from and to both molding tools; a transfer body 10 to which a molding core 41 arranged between both molding tools is protrusively fitted and a transfer means 50 which transfers the transfer body are provided. When the molding core is arranged between both molding tools by transferring both transfer bodies, a guide means 60 which guides the transfer body in a direction crossing at right angles its transfer direction to be arranged between both molding tools, is provided respectively to the molding machine 10.

9. 发明专利

JPH06123677A MEASURING METHOD OF CONNECTION LOSS OF OPTICAL CONNECTER 失效
公开(公告)号：JPH06123677A
公开(公告)日：1994-05-06
申请号：JP10534092
申请日：1992-03-31
申请人： FURUKAWA ELECTRIC CO LTD
发明人： YAMADA HIROYUKI , SHIGEMATSU TAKASHI , TAKAGI KOICHI
IPC分类号： G01M11/02
摘要： PURPOSE:To provide a connection loss-measuring method wherein the measuring of the connection loss is easily and efficiently performed and it is not necessary to break the connecter after measuring. CONSTITUTION:An optical fiber 2 to be optically connected to a light source 1 is inserted into a fiber inserting hole 4 of a master connecter 3 and an optical fiber 6 to be optically connected to a power meter 5 is inserted into a fiber inserting hole 8 of an optical connecter 7 to be measured. Mating faces 9, 10 of the respective connecter 3, 7 confront each other via matching film 11 so that the optical fibers 2, 6 respectively inserted into the connecter 3, 7 are optically connected with each other. In this optically connecting condition, an optical power from the light source 1 can be measured by means of the power meter 5 and in the condition wherein the optical connecter 7 to be measured is not connected to the master connecter 3, the other optical power is measured. From the difference between the optical powers, a connection loss of the optical connecter 7 to be measured is measured.

10. 发明专利

JPH06123676A MEASURING METHOD OF CONNECTION LOSS OF OPTICAL CONNECTER 失效
公开(公告)号：JPH06123676A
公开(公告)日：1994-05-06
申请号：JP10533992
申请日：1992-03-31
申请人： FURUKAWA ELECTRIC CO LTD
发明人： YAMADA HIROYUKI , SHIGEMATSU TAKASHI , TAKAGI KOICHI
IPC分类号： G01M11/02
摘要： PURPOSE:To provide a connection loss-measuring method wherein the measuring of the connection loss is easily and efficiently performed and it is not necessary to break the connecter after measuring. CONSTITUTION:An optical fiber 2 to be optically connected to a light source 1 is inserted into a fiber inserting hole 4 of a master connecter 3 to be bonded and fixed thereto. An optical fiber 6 to be optically connected to a power meter 5 is detachably inserted into a fiber inserting hole 8 of an optical connecter 7 to be measured and mating faces 9, 10 of the respective connecter 3, 7 confront each other so that the optical fibers 2, 6 respectively inserted into the connecter 3, 7 are optically connected with each other and the optical fiber 6 is pressed against the optical fiber 2, thereby holding the optically connecting condition. In this condition, an optical power from the light source 1 can be measured by means of the power meter 5 and in the condition wherein the optical connecter 7 to be measured is not connected to the master connecter 3, the other optical power is measured. From the difference between the optical powers, a connection loss of the optical connecter 7 to be measured is measured.

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