JP4917505B2 - Light rosette - Google Patents

Description

  The present invention relates to an optical rosette having an optical connector adapter that has fitting portions of optical connector parts at both ends and is used to optically connect two optical fibers.

  Various structures have been proposed for conventional optical rosettes as optical wiring devices. As an optical carrier construction method for the Internet, when an optical cable is drawn into the house, an optical terminator such as an ONU is directly attached without using an optical repeater such as an optical outlet or an optical rosette, and an electrical signal is transmitted by the optical terminator. In other words, a method of connecting to a home LAN was adopted. For this reason, there is almost nothing that has hitherto been practically used.

Also, as a recent trend, in order to respond to requests such as the advancement of optical wiring to newly built properties, liberalization of optical terminators, change of carrier companies, etc., it is planned to install relay devices such as optical outlets and optical rosettes The way of thinking has changed.
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  However, many conventional optical rosette structures have an optical adapter mounted inside the box, and the shutter structure is provided on the side of the rosette box, and the guideability of the optical connector plug inserted from the outside of the box is poor. It was. For example, conventionally, it has been a structure in which the light-shielding / dust-proof shutter must be opened and the plug inserted into the optical rosette with one hand not having the optical connector plug.

  Furthermore, in the optical rosette having a conventional structure, most of the entrances to the box of the rosette are directed in a single direction, and there are cases where the introduction path from the home entrance to the optical rosette is restricted.

  Therefore, the present invention has been devised in view of the existing circumstances as described above, and can easily insert an optical connector plug with only one hand having a plug, An object of the present invention is to provide an optical rosette having a structure in which an optical indoor line can be introduced from four directions and the optical entrance line does not fall below an allowable minimum bending radius.

In order to solve the above-described problems, the present invention includes a base plate and a cover that covers the surface side of the base plate, and optically connects two optical fibers to the base plate. An insertion frame portion that allows the connector housing of the optical connector adapter to be inserted and removed , an optical indoor wire introduction portion that is provided in four directions, up, down, left, and right so that the optical indoor wire can have an allowable bending radius or more; An extra-length storage unit that is connected to the indoor line introduction unit and can accommodate the extra length of the optical indoor line in a multi-stage loop shape along the inner peripheral wall surface, and is provided in the extra-length storage unit. A take-up locking part that winds and locks a part of the extra length by keeping the minimum radius by pulling the optical indoor line outward through the part ,
The connector housing can be opened against the pressing force of the leaf spring by fitting the optical connector of the optical wiring to one fitting portion of the connector housing from the outside of the cover,
The optical indoor line introduction part is configured by a groove formed by a curved branch so that the optical indoor line does not fall below the allowable minimum bending radius from the inner wall of the extra length storage part,
A passage surrounded by the curved inner wall surface at one end side of the inner surface of the extra length storage portion and the curved outer wall surface of the winding locking portion facing this is formed, and the optical indoor line is less than the allowable minimum bending radius by the passage. And guide them so that they do n’t
A space surrounded by the curved inner wall surface on the other end side of the inner surface of the surplus length storage portion and the curved outer wall surface of the winding latching portion facing this is formed, and is accommodated in the surplus length storage portion by the space. When the extra cable length of the indoor wiring is pulled out from the optical indoor line introduction part to a predetermined length, it is wound around the curved outer wall surface of the take-up locking part so that the optical indoor line does not fall below the allowable minimum bending radius. By being held and held, the base portion of the optical indoor line can be routed with a minimum radius .

  According to the present invention, an optical connector plug can be easily inserted with only one hand having a plug, and an optical indoor line can be introduced from four directions, up, down, left, and right, on the wall surface. An optical rosette having a structure in which the line does not fall below the allowable minimum bending radius can be provided.

  That is, the optical rosette according to the present invention can introduce an optical indoor line from four directions on the wall surface, up, down, left, and right, and the introduction port has a structure in which the optical indoor line does not fall below the allowable minimum bending radius. Since it is a rosette, the optical indoor line can be routed from either the top, bottom, left, or right, which increases the degree of freedom in routing. Therefore, optical rosettes can be placed on various parts such as indoor walls, ceilings, floors, etc., and the extra length of the optical indoor line can be stored compactly and pulled out. It is possible to provide a degree of freedom in the mounting position of the optical rosette, such as securing the extra length and changing the mounting position of the optical rosette by moving the installation location of the PC or the like.

  Furthermore, since the optical rosette according to the present invention has a structure for attaching an optical connector adapter with a shutter having a connector insertion guide wall and a light shielding / dustproof shutter structure, the optical connector plug can be attached to the optical rosette with only one hand having a plug. It can be easily inserted.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  The extra length storage type optical rosette according to the present invention is used, for example, for connection at a cable connection point of an optical cable drawn indoors from the outside in a wiring section of a communication cable, particularly an optical fiber cable having an optical fiber core. In addition to storing and protecting the cable surplus length of the indoor wiring, the cable surplus length can be pulled out to a predetermined length.

  In addition, this optical rosette has a light indoor line introducing portion, which will be described later, on the wall surface in four directions, up, down, left and right, and the introducing portion has a structure in which the light indoor line does not fall below the allowable minimum bending radius. ing.

  Furthermore, the optical indoor line is provided with steel wire in order to obtain tensile strength, and is an optical indoor line that is elastic to bending, so the optical indoor line accommodation in the optical rosette is accommodated in the bobbin. Instead of wrapping, it is basically structured to be accommodated along the inner wall of the optical rosette.

  Although the gist of the present invention has been described above, a specific configuration of the extra length storage type optical rosette will be described in detail below.

  As shown in FIGS. 6 and 7, the extra length storage type optical rosette 31 according to the present invention accommodates or pulls out about 50 mm, for example, which is a part of the extra length of the optical indoor line L. As shown in FIGS. 6 to 9, a base plate 32 whose back side is fixed inside the room, and a surface of the base plate 32 are provided. The optical connector adapter 1 is attached to a corner on one end of the inner surface of the base plate 32.

  That is, as shown in FIGS. 2 and 3, an insertion frame portion 35 whose front and rear sides and upper side are opened by standing upright pieces facing left and right is extended at corners on one end of the inner surface of the base plate 32. A convex portion 36b is formed on the upper side of the left and right opposing portions of the insertion frame portion 35, and when the optical connector adapter 1 is inserted from the outer opening end of the insertion frame portion 35, the left and right side walls of the optical connector adapter 1 The convex portion 36b is engaged with a step-shaped concave portion 36a (see FIGS. 2 to 3) formed on the upper side of 3c.

  Further, a spring piece-like locking portion 37 that protrudes upward in an L shape is formed on the bottom side edge portion at the outer opening end of the insertion frame portion 35, and an optical connector that is inserted into the insertion frame portion 35. The bottom wall 3b on the fitting portion A side of the adapter 1 for use is fitted in a patch-on manner so as to be secured and secured (see FIG. 12). On the other hand, as shown in FIG. 1, the cover 33 is formed with an opening 33a corresponding to the outer opening end of the insertion frame portion 35 of the base plate 32, and the shutter plate of the optical connector adapter 1 is formed from the opening 33a. 11 is exposed.

  As shown in FIGS. 2, 3, and 5, on the inner surface of the base plate 32, an outer gripping optical connector plug P attached to the fitting portion B (see FIG. 12) of the optical connector adapter 1. An extra-long storage portion 41 having an oval concave shape for accommodating the optical indoor line L with a minimum radius is formed.

  The surplus length storage portion 41 is gently curved and branched in four directions, top, bottom, left and right, so that the optical indoor line L is connected by a tangent line from the inner wall of the surplus length storage portion 41 so as not to be less than the allowable minimum bending radius. Optical indoor line introducing portions 42a, 42b, 42c, and 42d are formed by the grooves, and the extra-length accommodating portion 41 is communicated to the outside through the optical indoor line introducing portions 42a, 42b, 42c, and 42d. ing. Further, on the upper opening side of the surplus length storage portion 41, there are provided a plurality of locking pieces 41a for preventing the optical indoor line L from inadvertently deviating upward from the surplus length storage portion 41. ing.

  Then, as shown in FIGS. 5 and 6, the extra length of the optical indoor line L is stored in a multi-stage loop shape along the inner peripheral wall surface of the extra length storage portion 41 on the inner surface of the base plate 32, so The optical indoor line L is projected outward through any one of the indoor line introducing portions 42a, 42b, 42c, and 42d.

  Further, in order to prevent intrusion of dust, foreign matter, moisture and the like from the outer opening end into the base plate 32 at the outer opening ends of the optical indoor line introducing portions 42a, 42b, 42c, and 42d, FIG. As shown in FIG. 10, a narrow plate-projecting blocking portion 43 that can be folded is provided.

  On the other hand, as shown in FIG. 1, the cover 33 is formed with a notch groove 44 corresponding to the closing portion 43, and the notch groove 44 is closed by the closing portion 43 of the base plate 32 positioned inside. . When one of the four optical indoor line introduction portions 42a, 42b, 42c, and 42d is to be used, the outer opening end can be removed by folding and removing the corresponding blocking portion 43. Opened.

  In addition, the indoor wiring L accommodated in the surplus length accommodating portion 41 is provided at the other end side of the inner surface of the surplus length accommodating portion 41 located on the side opposite to the insertion frame portion 35 on one end side of the inner surface of the surplus length accommodating portion 41. A cylindrical shape for winding and holding the optical indoor line L so that it does not fall below the allowable minimum bending radius when the cable extra length is pulled out to a predetermined length from the optical indoor line introducing portions 42a, 42b, 42c, 42d. The take-up locking part 45 is projected.

  That is, the curved elongated passage surrounded by the curved inner wall surface on one end side of the inner surface of the surplus length storage portion 41 and the curved outer wall surface of the take-up locking portion 45 opposed to the curved inner wall L It is guided so as not to be less than the bending radius.

  However, as shown in FIG. 9, there is no curved inner wall surface on one end side of the inner surface of the extra length storage portion 41, and a restricting portion for ensuring the minimum bending of the optical indoor line L exists only on the inner wall of the base plate 32. In such a case, if the accommodation length of the optical indoor line L is too long and the optical indoor line L is brought close to the inner wall of the base plate 32, the indoor wiring L is pressed against the inner corner of the base plate 32 and bent, and the bending radius is increased. It is extremely bent to a small state, and it becomes impossible to secure a minimum bending radius or more.

  In the optical rosette of the present invention, the wide space surrounded by the curved inner wall surface at the other end of the inner surface of the surplus length storage portion 41 and the curved outer wall surface of the take-up locking portion 45 facing this is stored in the surplus length storage portion. 7A to 7E when the extra cable length of the indoor wiring L accommodated in the section 41 is pulled out to a predetermined length from the optical indoor line introducing sections 42a, 42b, 42c, and 42d. Thus, since the optical indoor line L is wound and held so as not to be less than or equal to the allowable minimum bending radius, the root portion of the optical indoor line L coming out of the local optical connector plug can be routed with the minimum radius. In addition, since each of the optical indoor line introduction portions 42a, 42b, 42c, and 42d is arranged in four directions, up, down, left, and right, the indoor light line L can be routed from either the top, bottom, left, or right.

  On the other hand, when the optical indoor line L is pushed into the extra length storage part 41 through the optical indoor line introduction parts 42a, 42b, 42c, 42d, the extra length of the take-up locking part 45 is released and wound. It is slid and stored on the inner peripheral wall surface of the extra length storage part 41 that is separated from the position of the catching and locking part 45 (see FIGS. 6A to 6D).

  For example, when the optical indoor line L is stored in the extra length storage unit 41, the maximum length is reduced by 50 mm, and when the optical indoor line L is drawn from the extra length storage unit 41, the maximum length is extended by 50 mm. Further, normally, the optical indoor line L is stored at a fixed position in a wide space between the inner peripheral wall surface of the extra length storage unit 41 and the take-up locking unit 45.

  By the way, the width of the extra-length storage unit 41 is determined by the minimum bending diameter of the optical indoor line L, and the storage amount of the extra-length storage unit 41 depends on the number of overlapping stages of the optical indoor line L and the take-up locking unit. It is determined by a radius of 45. Further, the size of the base plate 32 itself is determined within a range in which the optical indoor line L coming out from the station side optical connector plug can be routed with the minimum radius on the base plate 32 side. .

  Further, the extra length storage type optical rosette 31 according to the present invention has an inner wall of the extra length storage portion 41 on the inner wall so that it can be attached to the wall-embedded box V as shown in FIG. An opening 46 for introduction of the optical indoor line L to be a light entrance from the embedded box V is formed. At this time, the introduction opening 46 is formed at the position of the inner peripheral wall surface of the extra length storage portion 41 in the vicinity of the optical connector adapter 1 that is separated from the take-up locking portion 45.

  Further, screw holes 47 having a screw pitch matched to the wall embedding box V are formed at both ends of the base plate 32, and the bottom surface of the base plate 32 is provided in the wall embedding box V at a predetermined position such as an indoor wall surface. Are fixed by screwing screws into the screw holes 47 from the surface side of the base plate 32, and the cover 33 is fitted on the surface of the base plate 32.

  Further, the back side of the base plate 32 is provided with many flat portions for double-sided adhesive fasteners, and instead of fixing the base plate 32 with screws, the double-sided adhesive fasteners attached to the flat portions are used. The base plate 32 itself may be fixed at a desired indoor position.

  Next, an example of assembly, use, and operation of the best mode of the optical rosette of the present invention configured as described above will be described.

  First, after removing the cover 33 from the base plate 32 of the optical rosette 31 and screwing and fixing it to a predetermined position such as an indoor wall surface, the optical connector adapter 1 attached to the base plate 32 is removed. Then, as shown in FIG. 5A, the outer gripping optical connector plug P attached to the end of the optical indoor line L is connected to the optical connector adapter 1.

  Further, as shown in FIG. 5B, the optical indoor line L is introduced into the extra length storage part 41 via any one of the optical indoor line introduction parts 42a, 42b, 42c, 42d, and the extra length storage part. The extra length of the optical indoor line L is stored in a multi-stage loop shape along the inner peripheral wall surface of 41.

  As shown in FIG. 5 (c), the optical connector adapter 1 connected with the optical connector plug P of the optical indoor line L is inserted into the insertion frame portion 35 of the base plate 32 from the upper side while being slightly shifted to the front side. By pushing the optical connector adapter 1 rearward along the insertion frame portion 35, as shown in FIG. 5 (d), the locking portion 37 at the outer opening end of the insertion frame portion 35 is attached to the optical connector adapter 1. The bottom wall 3b on the fitting part A side is fitted in a patch-on manner, and is fixed in a retaining state. Thereafter, the cover 33 is placed on the base plate 32, and the shutter plate 11 of the optical connector adapter 1 is exposed and disposed through the opening 33a formed corresponding to the outer opening end of the insertion frame portion 35.

  At this time, when the position of the extra length storage type optical rosette 31 is determined as the installation location of various electric devices such as PCs is determined, it corresponds to the installation conditions of the optical rosette 31 on the indoor wall surface etc. Then, one of the up / down / left / right optical indoor line introduction sections 42a, 42b, 42c, and 42d is selected.

  That is, as shown in FIG. 6A, the optical indoor line L from the right side is introduced into the optical indoor line introduction part 42c on the right side of the optical rosette 31, and as shown in FIG. The optical indoor line L from the side is introduced into the optical indoor line introduction part 42 a on the upper side of the optical rosette 31, and the optical indoor line L from the left side is connected to the optical rosette 31 as shown in FIG. The light indoor line L from the lower side is introduced into the light indoor line introduction part 42b below the light rosette 31, as shown in FIG. 6 (d).

  Further, the cable extra length of the optical indoor line L accommodated in the extra length accommodating part 41 is changed to the upper, lower, left and right optical indoor line introducing parts 42a, 42b, 42c, 42d, or an opening for introduction on the inner surface of the extra length accommodating part 41. When pulled out from 46 to a predetermined length, as shown in FIGS. 7A to 7E, the optical indoor line L is wound and held so as not to be less than the allowable minimum bending radius. As a result, it is possible to route the root portion of the optical indoor line L coming out of the outer-grip optical connector plug P with the minimum radius.

  On the other hand, when the optical indoor line L is pushed into the extra length storage part 41 through the optical indoor line introduction parts 42a, 42b, 42c, 42d, the extra length of the take-up locking part 45 is released and wound. It is slid and stored on the inner peripheral wall surface of the extra length storage part 41 that is separated from the position of the catching and locking part 45 (see FIGS. 6A to 6D).

  Thus, when the optical indoor line L is stored in the extra length storage unit 41, for example, the maximum length is reduced by 50 mm, and when the optical indoor line L is drawn from the extra length storage unit 41, the maximum length is extended by, for example, 50 mm. is there. In this way, even when the mounting position of the extra length storage type optical rosette 31 is changed due to, for example, securing the extra length in the case of construction failure or moving the installation location of various electric devices such as PCs, this is sufficient. Can be dealt with.

  As shown in FIGS. 11 and 12, the optical connector adapter 1 used in the optical rosette according to the present invention has a rectangular tube shape made of a synthetic resin so that two optical connectors P can be connected to each other. At both ends of the connector housing 2, one fitting portion A of the optical connector P and the other fitting portion B of the optical connector P and other optical components are provided so that the optical axes coincide with each other.

  As shown in FIG. 11, the connector housing 2 is formed by integrally forming an upper side wall 3a and left and right side walls 3c, and a bottom wall 3b is attached between the left and right side walls 3c so as to face the upper side wall 3a. . In the center, a pair of left and right joining end wall members 3d having a substantially U-shaped frame shape is disposed, and the fitting end 3e in one fitting portion A is opened obliquely upward. Moreover, the connection end 3f in the other fitting part B is opened in the horizontal direction.

  Further, as shown in FIGS. 11 and 12, the inner center of the upper side wall 3a in one fitting portion A is a linear groove along the optical axis direction for guiding when the optical connector P is inserted. A key groove 12 is formed. Then, when a shutter plate 11 to be described later is disposed obliquely and the fitting end 3e of the fitting portion A is closed, a protrusion projecting from the center of the upper end of the shutter plate 11 in order to prevent dust from entering from the outside. The key groove 12 is sealed from the inside by the portion 13. That is, in a state where the fitting end 3e of the fitting portion A is closed from the inside by the shutter plate 11, the key groove 12 and the convex portion 13, and the upper wall 3a of the connector housing 2 and the upper edge of the shutter plate 11 are in contact with each other. By doing so, the shutter plate 11 reliably locks the fitting end 3e. A guide groove 14 is formed in the upper side wall 3a of the other fitting portion B from the connection end 3f toward the inside.

  As shown in FIG. 11 and FIG. 12, one cylinder 5a protrudes toward the fitting end 3e on one of the pair of left and right joining end wall members 3d arranged at the center of the connector housing 2. At the same time, the other joining end wall member 3d is formed with the other cylinder 5b toward the connection end 3f, and the cylinders 5a and 5b are aligned with the central axis on the optical axis to join the joining end wall members 3d. The sleeve holder 5 is formed by engaging and fixing these via the fitting claws 4. At this time, a cylindrical split sleeve 6 is mounted and held inside the sleeve holder 5. In addition, latch pieces 7 and 8 for the optical connector P are formed between the respective cylinders 5a and 5b and the side walls 3c at the left and right symmetrical positions of the joint end wall members 3d.

  As shown in FIGS. 11 and 12, the fitting end 3 e which is an oblique opening in one fitting portion A is for closing the fitting end 3 e in the same oblique arrangement as the fitting end 3 e. The shutter plate 11 is provided so that it can be opened and closed inside. That is, the shutter plate 11 has a support shaft 15 integrally projecting at the lower left and right symmetrical positions thereof, and the protrusions 15a provided at both ends of the support shaft 15 are connected to the bottom wall 3b at the left and right facing positions below the fitting end 3e, The shaft hole 16 formed so as to straddle the left and right side walls 3c is rotatably supported.

  A rectangular opening 17 is formed at the approximate center where the lower end of the shutter plate 11 and the support shaft 15 are connected, and the opening 17 is bent into an approximately L shape. The plate spring 18 is externally fitted to the center of the support shaft 15, one end of the plate spring 18 is pressed against the bottom wall 3 b, and the other end is pressed against the inner surface of the shutter plate 11, thereby closing the shutter plate 11 in the closing direction. Energized.

  At this time, the convex portion 13 protruding from the center of the upper end of the shutter plate 11 is hermetically locked to the key groove 12 provided on the upper side wall 3a of the connector housing 2. The opening 17 is always closed by the elastic force of the leaf spring 18. Accordingly, dust or the like does not enter the connector housing 2 from the opening 17. The leaf spring 18 is arranged so that one end of the leaf spring 18 extends to the optical axis when the shutter plate 11 is brought into pressure contact with the inside of the fitting end 3e in one fitting portion A of the connector housing 2. It is long enough.

  Thus, the shutter plate 11 is opened against the pressing force of the leaf spring 18 by fitting the optical connector P into one fitting portion A of the connector housing 2.

  Further, a guide member 21 having an inclined guide 20 is attached to the protrusion 19 at the left / right symmetrical position above the outer surface of the shutter plate 11, and the optical connector is fitted into one fitting portion A of the connector housing 2. While guiding P, the shutter plate 11 is held in a horizontal position.

It is a perspective view of the extra length accommodation type optical rosette using the adapter for optical connectors of the present invention. It is a perspective view which shows the structure of a base board. It is a top view of a base board similarly. An example of an optical rosette is shown, (a) is a plan view, (b) is a side view, and (c) is a front view. The procedure for attaching the optical indoor line to the optical rosette is shown. (A) is a plan view of the state where the outer cover holding optical connector plug is connected to the optical connector adapter, and (b) is the extra length of the optical indoor line. FIG. 4C is a plan view of a state in which the optical connector adapter is inserted into the long storage part at a fixed position, and FIG. FIG. 5 is a plan view of a state in which the optical connector adapter is pushed and fixed rearward along the insertion frame portion. The usage state of the up / down / left / right optical indoor line introduction part is shown, (a) is a plan view of the state where the optical indoor line from the right side is introduced into the right optical indoor line introduction part, and (b) is from the upper side. FIG. 4C is a plan view of a state in which the optical indoor line is introduced into the upper optical indoor line introduction section, FIG. 5C is a plan view of a state in which the optical indoor line from the left side is introduced into the left optical indoor line introduction section; FIG. 5 is a plan view of a state in which an optical indoor line from the lower side is introduced into a lower optical indoor line introduction unit. (A) thru | or (e) pulls out the extra length of the indoor wiring accommodated in the extra length storage part to predetermined length from the opening part for introduction of the up-and-down, right and left optical indoor line introduction part or the extra length storage part inner surface It is a top view which shows the state. An example of an optical rosette that can be installed in an indoor wall-embedded box is shown, (a) is a plan view, and (b) is a cross-sectional view taken along line AA of (a). It is a top view which shows the state in which the indoor wiring cannot ensure more than the minimum bending radius in case the control part for ensuring the minimum bending of an optical indoor line exists only in the inner wall of a base board. It is a partially notched perspective view which shows an example of the closure part which can be folded. It is a perspective view of the adapter for optical connectors similarly. It is the center longitudinal cross-sectional view of the adapter for optical connectors similarly.

P Optical connector A, B Fitting part L Optical indoor line V Wall-embedded box P Outer gripping optical connector plug 1 Optical connector adapter 2 Connector housing 3a Upper side wall 3b Bottom wall 3c Left and right side walls 3d Joint end wall member 3e Fitting Joint end 3f Connection end 5a, 5b Cylinder 5 Sleeve holder 6 Split sleeve 7, 8 Latch piece 11 Shutter plate 12 Key groove 13 Projection 14 Guide groove 15 Support shaft 15a Projection 16 Shaft hole 17 Opening 18 Plate spring 19 Projection 20 Inclined guide 21 Guide member 31 Optical rosette 32 Base plate 33 Cover 33a Opening portion 35 Insertion frame portion 36a Recessed portion 36b Protruding portion 37 Locking portion 41 Extra length storage portion 41a Locking pieces 42a, 42b, 42c, 42d Part 45 Take-up latching part 46 Introduction opening 47 Screw hole

Claims (1)

A base plate and a cover that covers the surface side of the base plate, and an insertion that allows a connector housing of an optical connector adapter for optically connecting two optical fibers to the base plate to be inserted and removed. A frame, a light indoor line introduction part provided in four directions (up, down, left, and right) so that the light indoor line can have an allowable minimum bending radius or more, and the light indoor line introduction part communicate with the light indoor line. A surplus length storage section that can be stored in a loop shape along the inner peripheral wall surface, and a surplus length storage section provided in the surplus length storage section, by pulling the optical indoor line outward through the optical indoor line introduction section A take-up locking part that winds and locks a part of the extra length so as to maintain a minimum radius ;
The connector housing can be opened against the pressing force of the leaf spring by fitting the optical connector of the optical wiring to one fitting portion of the connector housing from the outside of the cover,
The optical indoor line introduction part is configured by a groove formed by a curved branch so that the optical indoor line does not fall below the allowable minimum bending radius from the inner wall of the extra length storage part,
A passage surrounded by the curved inner wall surface at one end side of the inner surface of the extra length storage portion and the curved outer wall surface of the winding locking portion facing this is formed, and the optical indoor line is less than the allowable minimum bending radius by the passage. And guide them so that they do n’t
A space surrounded by the curved inner wall surface on the other end side of the inner surface of the surplus length storage portion and the curved outer wall surface of the winding latching portion facing this is formed, and is accommodated in the surplus length storage portion by the space. When the extra cable length of the indoor wiring is pulled out from the optical indoor line introduction part to a predetermined length, it is wound around the curved outer wall surface of the take-up locking part so that the optical indoor line does not fall below the allowable minimum bending radius. An optical rosette characterized in that the root portion of the optical indoor line can be routed with a minimum radius by being held and held .

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