JP2007192933A - Coupler for optical fiber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent loosing of the part at which a female side optical connector is fixed even when external force such as tensile force given by pulling an optical fiber is applied. <P>SOLUTION: The coupler for optical fiber houses an optical receptacle 2 being a female side optical connector to which an optical plug 1 being a male side optical connector can be inserted and removed in a box-type case 3, wherein outer covering clamping part 6 which clamps the outer covering of an optical fiber cable 10 and the rear end of a plug 10a fitted to the end of the optical fiber cable 10, and a fixing means which fixes the optical receptacle 2 and the outer covering clamping part 6, respectively, are provided in the case 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an optical fiber outlet installed in a form exposed on a construction surface such as a wall surface.

Conventionally, as an optical fiber outlet attached to a construction surface such as a wall or a floor, there has been one disclosed in Patent Document 1, for example. This optical fiber outlet is mounted on the body and the front part of the body so as to be able to protrude forward of the body, and the front surface is parallel to the mounting surface of the construction material such as a wall in the state where the optical fiber receptacle is housed in the body. An optical fiber receptacle that is attached to the cover so that the plug connection port faces the outside of the body when the cover protrudes forward, and an urging means that constantly urges the cover in a direction that protrudes toward the front of the body. It comprises holding means for holding the state in which the optical fiber receptacle is accommodated, and comprises a pop-up mechanism for projecting the cover forward of the body when the holding means is released.
JP 2005-70340 A

  However, in the above conventional example, only the optical fiber receptacle (female-side optical connector) is fixed to the cover, so that when an external force such as drawing the optical fiber cable or hooking a leg is applied, the optical fiber cable There is a problem in that the tensile force acts on the portion and the portion where the female optical connector is fixed is loosened.

  The present invention has been made in view of the above points, and provides an optical fiber outlet in which a portion to which a female optical connector is fixed is not loosened even when an external force such as pulling an optical fiber cable is applied. The purpose is to do.

  In order to achieve the above object, the invention of claim 1 is an optical fiber outlet in which a female optical connector into which a male optical connector can be inserted and removed is housed in a box-like case, The case includes an outer skin gripping part for gripping the female optical connector and fixing means for fixing the female optical connector and the outer skin gripping part.

  According to a second aspect of the present invention, in the first aspect of the present invention, the case is configured by abutting the respective opening surfaces of the body and the cover, each of which is a box having an opening on one side, and a male optical connector as a fixing means. The body and the cover are each provided with a fixing portion that clamps and fixes the female optical connector and the outer skin gripping portion in a direction perpendicular to the direction in which the body and the cover are joined.

  According to a third aspect of the present invention, in the second aspect of the present invention, as the fixing means, the female optical connector and the outer gripper as the fixing means are perpendicular to both the direction in which the male optical connector is inserted and removed and the direction in which the body and the cover are coupled. The contact part which contact | abuts a part is provided in at least any one of the body and the cover.

  According to a fourth aspect of the present invention, in the second aspect of the invention, as the fixing means, a stop portion that comes into contact with the outer skin gripping portion in a direction in which the male optical connector is inserted or removed is provided on at least one of the body and the cover. Features.

  According to the first aspect of the present invention, there is provided an optical fiber outlet in which a female optical connector from which a male optical connector can be inserted and removed is housed in a box-shaped case, wherein an optical fiber cable sheath and a female optical connector are provided. Since the case has a skin gripping part to be gripped and a fixing means for fixing the female optical connector and the skin gripping part in the case, the female optical connector can be applied even when an external force such as pulling an optical fiber cable is applied. And the part where the outer skin gripping part is fixed is less likely to loosen.

  According to the invention of claim 2, the case is configured by abutting the respective opening surfaces of the body and the cover, each of which is an open box, and a direction in which the male optical connector is inserted and removed as the fixing means. Since the body and the cover are each provided with a fixing part for holding and fixing the female optical connector and the outer skin gripping part in the direction in which the body and the cover are joined, the female optical connector and the outer skin gripping part are provided on the male side. The optical connector on the female side and the outer skin gripping portion can be more reliably fixed in the direction perpendicular to the direction in which the optical connector is inserted and removed and in the direction in which the body and the cover are coupled.

  According to the invention of claim 3, as the fixing means, the abutting contact with the female optical connector and the outer skin gripping part in a direction perpendicular to both the direction in which the male optical connector is inserted and removed and the direction in which the body and the cover are coupled is performed. Since the contact portion is provided on at least one of the body and the cover, the female optical connector and the skin gripping portion are arranged in a direction perpendicular to both the direction in which the male optical connector is inserted and removed and the direction in which the body and the cover are coupled. It can be fixed more reliably.

  According to the invention of claim 4, as the fixing means, at least one of the body and the cover is provided with the stop portion that comes into contact with the outer skin gripping portion in the direction in which the male optical connector is inserted or removed. The female optical connector and the outer skin gripping part can be more reliably fixed in the direction in which the connector is inserted and removed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, in the longitudinal direction of the body 4, the front side in FIG. 1 is the front direction and the back side is the rear direction, and in the short direction of the body 4, the front side in FIG. The left and right direction is defined as the vertical direction in FIG.

  As shown in FIG. 1, the optical fiber outlet according to the present embodiment accommodates in a case 3 an optical receptacle 2 that is a female optical connector to which an optical plug 1 (see FIG. 4) that is a male optical connector can be inserted and removed. Configured. The case 3 is formed in a substantially rectangular parallelepiped shape from a synthetic resin material, and is fixed to the construction surface such as a wall surface so that the lower surface is opposed to the body 4, and the optical receptacle 2 is mounted on the upper surface side, The cover 5 is detachably coupled to the body 4 so as to cover the upper surface side of the optical receptacle 2.

  The optical plug 1 and the optical receptacle 2 constitute, for example, an SC type optical connector (F04 type single-core optical fiber connector specified by JIS C5973), and have a push-on type fastening structure with a slide lock structure. Since the optical plug 1 is well known and does not relate to the gist of the present invention, detailed description is omitted here.

  The optical receptacle 2 is configured by housing a ferrule, a sleeve, a split sleeve and the like (not shown) in a substantially rectangular parallelepiped housing 20. The housing 20 is formed so that the outer peripheral surface on the front side protrudes from the outer peripheral surface on the rear side, and an opening 21 through which the optical plug 1 can be inserted and removed is provided on the front surface of the housing 20. The rear surface of the housing 20 is provided with a cable opening 22 through which the plug 10a attached to the tip of the optical fiber cable 10 can be inserted and removed. By inserting the plug 10a into the cable connection port 22, the optical plug 1 and Optically connected (see FIG. 2B). In this embodiment, in order to connect the optical fiber cable 10 to the optical receptacle 2, a plug 10a attached to the tip of the optical fiber cable 10 is attached to the optical receptacle 2 in consideration of workability. The female connector including 10a is configured. A substantially rectangular parallelepiped outer skin gripping portion 6 that covers the rear portion of the plug 10a and the outer sheath of the optical fiber cable 10 is attached to the plug 10a, and a connecting portion between the optical fiber cable 10 and the plug 10a is fixed. Further, flanges 23 that protrude outward are provided on both the left and right sides of the rear surface of the outer surface on the front side of the housing 20.

  The body 4 is formed in a box having an upper surface opened, a front wall 40 protruding upward is provided on the front surface, and a rectangular opening window 40 a is provided in the center of the front wall 40. A mounting portion 41 to which the optical receptacle 2 is mounted is formed in front of the body 4, and a flat plate-shaped main piece 43 a that protrudes upward is formed on the left and right sides of the front of the mounting portion 41 in the short direction of the body 4. A total of four hook-shaped locking pieces 43 each including a locking protrusion 43b protruding from the upper end edge of the main piece 43a toward the inside of the body 4 are formed. The optical receptacle 2 is mounted on the mounting portion 41 by sliding and fitting the flanges 43 of the optical receptacle 2 from above between the locking pieces 43 and locking the housing 20 by the locking protrusions 43b. . The optical receptacle 2 is mounted so that the optical plug 1 can be inserted into and removed from the opening 21 of the optical receptacle 2 through the opening window 40 a of the body 4. On the rear surface of the body 4, knockout portions 46 are provided at a plurality of locations (three locations in the drawing). Any one of the knockout portions 46 is cut to open a hole, and the optical fiber cable 10 from the outside is connected to the case 3. It is a cable insertion hole to guide it in.

  Further, boss portions 42 are formed on both the left and right sides of the mounting portion 41, respectively, and attachment holes 42 a penetrating the body 4 in the vertical direction are formed in each boss portion 42. The body 4 is fixed to the construction surface by screwing a screw (not shown) into a construction surface (not shown) such as a wooden wall through the mounting hole 42a. When the construction surface is made of steel (for example, when attached to an office desk or the like), a magnet (not shown) that is detachably attached to the back surface of the body 4 may be magnetically attached to the construction surface.

  The cover 5 is formed in a box whose bottom surface is open, and covers the top surface side of the body 4 in a state where the optical receptacle 2 is mounted. An opening 50 is provided in the peripheral wall on the front side of the cover 5 over the entire length in the short direction.

  Next, the coupling structure of the body 4 and the cover 5 in this embodiment will be described. As shown in FIG. 1, the portions near the front wall 40 at both ends along the longitudinal direction of the body 4 are opposed to the adherend surface (upper surface) covered by the cover 5 with a certain distance and the body 4. Rail portions 44 that extend substantially parallel to the longitudinal direction project upward. The rail portion 44 is formed in a bowl shape having a flat plate-like main piece 44a protruding upward and an engaging protrusion 44b protruding from the upper end edge of the main piece 44a toward the outside of the body 4.

  On the other hand, when the cover 5 is slid in the longitudinal direction along the upper surface of the body 4, it engages with the engagement protrusions 44 b of the rail portion 44 on the inner side surfaces of both ends along the longitudinal direction of the cover 5. Engagement pieces (not shown) are respectively provided.

  Accordingly, the cover is placed in a direction approaching the front wall 40 of the body 4 (hereinafter referred to as “mounting direction”) with the cover 5 placed on the upper surface of the body 4 so that the engagement piece does not overlap the engagement protrusion 44b. When 5 is slid, the engagement piece and the engagement projection piece 44b engage with each other so that the cover 5 can be attached to the body 4 and coupled to each other (see FIG. 3). Further, in order to remove the cover 5 from the body 4, the cover 5 is slid in the direction opposite to the mounting direction to release the engagement state between the engagement piece and the engagement protrusion 44b. Can be removed from.

  Locking means for preventing the cover 5 from being detached from the upper surface of the body 4 along the vertical and horizontal directions of the case 3 is locked while the cover 5 is slid and attached to the upper surface of the body 4. 4 and cover 5. The locking means includes a pair of locking protrusions (not shown) provided on the cover 5 and a pair of locking protrusions which are provided on the body 4 and are respectively fitted to the locking protrusions when the cover 5 is slid. And the locking fitting portion 45.

  The locking protrusion protrudes inward in the longitudinal direction on the peripheral wall on the rear surface side of the cover 5. The lock fitting portion 45 is in contact with the rear surface of the body 4 and protrudes upward, and a lock fitting hole (not shown) that opens outward in the longitudinal direction of the body 4 is formed. .

  Thus, when the cover 5 is slid in the mounting direction with the cover 4 being placed on the upper surface of the body 4, the lock projection of the cover 5 is formed with the lock fitting hole formed in the lock fitting portion 45 of the body 4. Since it engages, the coupling | bonding strength of the body 4 and the cover 5 becomes strong.

  Hereinafter, the fixing means for fixing the optical receptacle 2 and the outer skin gripping part 6 in the present embodiment will be described with reference to FIG. As shown in FIG. 2A, behind the boss portions 42 of the body 4 are abutting portions 8 that are substantially U-shaped in a plan view and project upward. In the state where the optical receptacle 2 is mounted, the outer skin gripping part 6 is clamped. Therefore, the outer skin gripping part 6 can be fixed in the left-right direction.

  Further, as shown in FIG. 2B, the body 4 has a fixing portion 7 composed of a plurality of protrusions (three in the drawing) provided along the longitudinal direction of the body 4. Although not shown in the drawings, fixing portions 7 each including a plurality of protrusions (two in the present embodiment) provided along the longitudinal direction of the cover 5 are formed. These protrusions are provided at equal intervals in the left-right direction, and are formed in a stepped shape. Specifically, in the state where the body 4 and the cover 5 are joined, the protrusions of the fixing portion 7 of the body 4 are the front portion of the lower surface of the rear portion of the housing 20 of the optical receptacle 2 and the rear portion of the outer skin gripping portion 6. The protrusion of the fixing portion 7 of the cover 5 is formed so as to abut the lower surface, and the front portion is in the state where the body 4 and the cover 5 are coupled, and the front portion is the upper surface of the front portion of the housing 20 of the optical receptacle 2 and the central portion. Are formed such that the upper surface of the rear portion of the housing 20 of the optical receptacle 2 and the rear portion thereof are in contact with the upper surface of the outer skin gripping portion 6. Therefore, the optical receptacle 2 and the outer skin gripping portion 6 can be held in contact with each other in the vertical direction, and the optical receptacle 2 and the outer skin gripping portion 6 can be fixed in the vertical direction.

  Further, as shown in FIG. 2B, a stop portion 9 that protrudes downward is provided behind the fixing portion 7 of the cover 5, and the stop portion 9 is connected to the body 4 and the cover 5. In this state, it comes into contact with the rear surface of the outer skin gripping portion 6. Therefore, the outer skin gripping part 6 can be fixed in the front-rear direction.

  As described above, by providing the fixing portion 7, the abutting portion 8, and the stop portion 9, the optical receptacle 2 and the outer skin gripping portion 6 can be securely fixed, and thus an external force generated by pulling the optical fiber cable 10 or the like. Therefore, it is possible to prevent the portions where the optical receptacle 2 and the outer skin gripping portion 6 are fixed from being loosened.

It is a disassembled perspective view which shows the receptacle for optical fibers of embodiment of this invention. It is a figure which shows the same, (a) is an upper surface perspective view, (b) is an AA sectional view taken on the line, (c) is a back view, (d) is a front view. It is a whole perspective view same as the above. It is a figure which shows the case where the optical plug same as the above is attached, (a) is a top view, (b) is a right view.

Explanation of symbols

1 Male optical connector (optical plug)
2 Female connector (optical receptacle)
3 Case 4 Body 5 Cover 6 Skin gripping part 7 Fixing part 8 Contact part 9 Stop part

Claims (4)

  An optical fiber outlet in which a female optical connector in which a male optical connector can be inserted and removed is housed in a box-shaped case, and a female fiber side and an outer skin gripping part for gripping the female optical connector and the female optical connector An optical fiber outlet characterized in that the optical connector and a fixing means for fixing the outer skin gripping part are provided in the case.   The case is configured by abutting the respective opening surfaces of the body and the cover, each of which is a box having an opening on one surface, and as the fixing means, orthogonal to the direction in which the male optical connector is inserted and removed, and the body and the cover. 2. The optical fiber outlet according to claim 1, wherein the body and the cover are each provided with a fixing portion for holding and fixing the female optical connector and the outer skin gripping portion in the coupling direction.   As the fixing means, a contact portion that contacts the female optical connector and the outer skin gripping portion in a direction orthogonal to both the direction in which the male optical connector is inserted and removed and the direction in which the body and the cover are coupled is provided at least on the body and the cover. 3. The optical fiber outlet according to claim 2, wherein the optical fiber outlet is provided in either one of the two. 3. The optical fiber outlet according to claim 2, wherein the fixing means is provided with at least one of a body and a cover with a stop portion that comes into contact with the outer skin gripping portion in a direction in which the male optical connector is inserted and removed.

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