JP2007086737A - Optical receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate connecting operation of an optical fiber by making connection possible in a free working place outside a case without being bothered with the side panel of the case body. <P>SOLUTION: The optical receiver is equipped with a case body having a storing space, an optical reception part to be stored in the storing space, an optical fiber housing part for housing an excess optical fiber, and an introducing path which is designed to introduce an optical fiber from the outside to the optical fiber housing part in a manner penetrating the side panel of the case body. In addition, inside the introducing path, a stopper part is provided which receives to stop the optical cable inserted into the introducing path. In a position opposite from the stopper part across the optical cable, there is provided a pressing member which comes in press contact with the optical cable to keep it in an immovable state. Between the circumferential face of the introducing path and the opening edge in the side panel of the case body, a slit is formed so that the optical cable can be inserted in a laid down state into the introducing path. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

According to the present invention, an optical receiving unit including an O / E conversion unit is accommodated in a housing space of a case main body, an optical fiber storage unit is further provided on the front side thereof, and light is passed through a side plate of the case main body from the outside. The present invention relates to an optical receiver including an introduction path configured to allow an optical cable to be introduced into a fiber accommodating portion.

A conventional optical receiver will be described with reference to FIGS. FIG. 1 and FIG. 2 are for explaining the embodiments of the present invention. In these figures, the structures denoted by reference numerals 1 to 29 and 39 to 60 are conventionally known structures (for example, JP, 2005-24760, A). Therefore, a conventional example will be described with reference to FIGS.
Reference numeral 3 denotes a case body in the optical receiver 1, and 5 denotes a storage space in the case body 3. Reference numeral 13 denotes an optical receiver that converts an optical signal input from the outside into an electrical signal (O / E conversion) and outputs the electrical signal, and is stored in the storage space 5 as shown. Reference numeral 24 denotes an optical fiber accommodating portion for accommodating the extra length optical fibers 44, 45, 46 and 47. The optical fiber housing portion 24 is provided with winding frames 26, 27, a peripheral wall 58, and the like whose front side is open in order to wind the extra length optical fibers 44, 45, 46, 47 with a predetermined curvature. Reference numeral 60 denotes an introduction path for introducing an optical fiber from the outside of the case main body toward the optical fiber accommodating portion 24, and is configured to penetrate the side plate 3a of the case main body. Reference numeral 39 denotes a clamping tool disposed inside the case of the introduction path 60 in order to hold the optical cables 41 and 42 introduced into the introduction path 60 in a stationary state. The sandwiching tool 39 includes a lower sandwiching member for receiving the introduced optical cable, and an upper sandwiching member that presses the optical cable from above.
In this conventional optical receiver, after the optical fiber 44 or the like is introduced into the optical fiber housing portion, the optical cables 41 and 42 are clamped by the clamping tool 39 composed of the upper and lower clamping members, and the screws 40 and 40 are used. By tightening, the optical cables 41 and 42 located in the introduction path 60 are held. (For example, refer to Patent Document 1).

Japanese Patent Laid-Open No. 2005-24760

In the operation of installing the optical receiver, it is necessary to connect the optical cable drawn from the outside and the optical fiber connected to the optical receiver housed in the case.
However, if the external and internal optical fibers are connected first, the case body cannot be covered.
Therefore, in the conventional optical fiber connection work of the optical receiver, the optical cable from the outside is inserted into the introduction path that penetrates the side plate of the case main body and stored in the case, and then the optical cable connected to the optical receiving unit. I was trying to connect with the fiber.
When connecting by such a method, the tip of the optical cable stored in the case has to be pulled out to the place of the connection work outside the case, and there is a problem that the place of the connection work is restricted.

An object of the present application is to provide an optical receiver that can be connected at a free work place outside the case without being bothered by the side plate of the case body in the case of optical fiber connection work.
In addition, even if the optical fibers can be connected to each other at a free place outside the case, an optical receiver that can be accommodated in the case in a state where the side plate of the case main body is penetrated by a very simple means after the connection. It is something to be offered.
Another object is to fix the optical cable in the introduction path by simply rotating the pressing member after accommodating the optical fiber from the outside toward the optical fiber accommodating portion during the optical fiber accommodating operation. It is intended to provide an optical receiver capable of performing the above.
Another object is to accommodate the optical fiber in the case where the pressing member in the introduction path is provided with a complementary member, and after the completion of fixing the optical cable, the dust enters the case body from the slit in the side plate of the case body. It is an object of the present invention to provide an optical receiver that can be prevented.
Other objects and advantages will be readily apparent from the drawings and the following description associated therewith.

  The optical receiver according to the present invention includes a case body 3 having a storage space 5, an optical receiver 13 that is stored in the storage space 5, converts an optical signal input from the outside into an electrical signal, and outputs the electrical signal. An optical fiber housing portion 24 having a winding frame which is housed on the front side of the optical receiving portion 13 and has an open front surface for winding an extra length optical fiber with a predetermined curvature such as 44, and a side plate 3a of the case body And an introduction path 60 that allows the optical fiber 44 and the like to be introduced from the outside of the case main body toward the optical fiber accommodating portion 24, and further, the introduction path 60 is provided inside the introduction path 60. A receiving portion for receiving the inserted optical cable 41 and the like is provided, and the optical cable 41 and the like are brought into an immovable state by being pressed against the optical cable 41 and the like at a position opposite to the receiving portion with respect to the optical cable 41 and the like. Pressing member In the optical receiver 1 provided, a slit 110 is provided between the peripheral surface of the introduction path 60 and the opening edge 3f of the side plate 3a of the case body so that the optical cable 41 or the like can be inserted into the introduction path 60 in a lying state. Is formed.

  Preferably, the pressing member 63 is pivotally attached to a part of the case main body at a side position of the slit 110, and the rotation range is away from the slit position in the open state. What is necessary is just to be in the retracted position, and in the pressing position, the pressing position may be such that the optical cable 41 is brought into a stationary state by being pressed against the optical cable 41 or the like.

  Further, it is preferable that the pressing member is provided with a complementary member having a size capable of closing the slit at the pressing position so as to be integrally movable.

As described above, in the present invention, the extra length optical fiber is inserted into the slit formed between the opening edge of the side plate of the case body and the peripheral surface of the introduction path in a lying state, and the extra length optical fiber is inserted into the side plate of the case body. Since it can be housed in the case in a state where it penetrates, it is easy to work in a free and spacious place outside the case without being bothered by the presence of the side plate of the case body when connecting optical fibers. There is a work effect that can be connected.
Moreover, even if the optical fibers can be connected to each other in a free place outside the case, after the optical fiber connection, the optical cable is inserted into the slit formed from the opening edge of the side plate of the case body toward the peripheral surface of the introduction path. There is an operational effect that the optical fiber can be accommodated in the case in a state of penetrating the side plate of the case main body by an extremely simple means of only being inserted in the lying state.

Furthermore, in the present invention, when the pressing member in the introduction path is pivotally attached to a part of the case main body at the side position of the slit,
When the optical fiber is introduced into the optical fiber accommodating portion during the optical fiber accommodating operation, it can be moved away from the slit by simply rotating the pressing member in the introduction path. The introduction can be smoothly inserted into the introduction path through the slit without being obstructed by the pressing member.
Furthermore, after the optical fiber is accommodated in the optical fiber accommodating portion, the optical cable in the introduction path can be fixed by a simple operation by simply rotating the pressing member in the retracted position to the pressing position. There is an effect.

  Further, in the present invention, in the case where the pressing member in the introduction path is provided with a complementary member, the optical fiber is accommodated, and after the optical cable fixing is completed, the complementary member of the pressing member blocks the slit of the case body side plate. Since the side plate is complemented, there is a use effect that can prevent dust from entering the case.

  Embodiments of the present invention will be described below with reference to FIGS. 1 to 11, FIGS. 1 and 2 are a front view and a front view showing a positional relationship between the case main body 3 in the case, the light receiving unit 13 and the optical fiber accommodating unit 24 accommodated in the case, and the introduction path 60. It is a disassembled perspective view. The configuration of the introduction path 60 in FIGS. 1 and 2 displays an introduction path related to a conventionally known configuration. Embodiments will be described below with reference to the drawings.

Reference numeral 3 denotes a case body in the optical receiver 1 installed near an entrance / exit of an office building or a condominium as is well known, and normally includes an arbitrary lid that is not shown in the figure so as to be freely opened and closed. 4a indicates a stopper of the lid. The case body 3 is disposed between a top plate (also referred to as a side plate) 3c, a connection board (also referred to as a side plate) 3a arranged in a state parallel to the top plate 3c, and the top plate 3c and the connection board 3a. And the rear side plate 3d provided so as to block one surface of the rectangular space 5 surrounded by the top plate 3c, the connection board 3a, and the two side plates 3b. Yes. The four side plates 3a, 3b, 3b, 3c and the back side plate 3d of the case body 3 are made of a plastic material integrally or by combining different materials.
The front side surface of the case body 3 is provided with a relatively large opening 3e for operating the light receiving unit 13 and the optical fiber 44 in the case from the outside of the case. Further, with respect to the opening 3e of the case body 3 The case is configured by covering the lid (not shown) pivotally attached to the case body so as to be freely opened and closed.
Reference numeral 5 denotes a storage space in the case main body 3, and the optical receiver 13 including the O / E conversion means is stored therein.
3g shows the side plate member which comprises a part of side plate 3a. The side plate member 3g is configured to be separated from the side plate 3a so as to be handled integrally with the substrate 25 as shown in FIGS. 2, 3 and the like, and slightly when the substrate 25 is attached to the case body 3. It can be integrated so that the cut 103 can be seen (see FIGS. 1 and 5).
Reference numerals 8 and 9 denote output terminal protrusions for taking out known television signals provided on the side plate 3a. Reference numeral 106 denotes a cylindrical projection provided integrally with the side plate 3a, and is configured so that a known waterproof cap can be attached as necessary. 106 a is a partition for dividing the optical cable 41 and 42 by dividing the entrance 6 into two, and is integrally formed with the projecting port 106.
Reference numeral 110 denotes a slit formed between an opening edge 3f of the side plate 3a and a peripheral surface of the introduction path described later, and an optical cable can be inserted into the introduction path from the opening edge in a lying state. As shown in FIGS. 4 and 5, the slit 110 is continuously formed on the peripheral surface of the projecting opening 106.
The side plate member 3g and the projecting port 106 are illustrated and described as an example made of an integral material with the substrate 25. However, the side plate member 3g and the projecting port 106 may be composed of an integral material with the side plate 3a of the case body. Good. Further, it may be configured to be formed integrally with the lid in the case and integrated with the side plate 3a in a state where the lid is covered.

  The optical receiver 13 shown in FIGS. 1 and 2 is composed of a metal case (chassis) 14 having a shielding effect on the outside, as is generally known, and an optical signal is received inside the television receiver. Means for converting to an input signal for use, usually an electronic circuit known as O / E conversion means. If necessary, an amplifier circuit is accommodated as is well known. The case 14 of the optical receiver 13 is detachably held by a fixture on the side of the case main body 3 that is configured to be freely attached / detached, for example, a hook piece 10. An optical adapter 20 whose height is set to be higher than the surface of the substrate 25 is detachably fixed to the surface of the case (chassis) 14. An optical connector 21a attached to the tip of the optical fiber 17 connected to the O / E conversion means in the case 14 is detachably connected to the optical adapter 20. The optical connector 21a may be accommodated in the case 14 through a hole provided in the case 14, or the lead wire of the optical fiber 17 may be elongated so that the cover of the case 14 can be opened and closed. Reference numerals 16 and 16a indicate the presence of a known television signal output terminal and television signal output level measurement terminal.

  Reference numeral 25 denotes a substrate for partitioning the optical receiving unit 13 accommodated in the case body 3 and the optical fiber accommodating unit 24 provided on the front side thereof, and is formed of a hard flat plate material such as plastic or metal. Reference numeral 25 a denotes a cover extended from the substrate 25 for protecting the lead wire 17. Reference numeral 25b denotes the presence of a temporary connector fastener provided on the substrate 25.

Next, reference numeral 24 denotes an extra length optical fiber accommodating portion provided on the surface of the substrate 25. In the optical fiber housing portion 24, as shown in the figure, the first winding having the peripheral walls 26a and 27a formed to have a small curvature within the range of the safety curvature that allows the optical fibers 44, 45, 46, and 47 to be attached. The frame 26 and the second winding frame 27 are juxtaposed. There are various theories as to the safety curvature depending on the manufacturer of the optical fiber, but it is generally said that if the radius is 20 to 30 mm, the curvature is safe.
The first winding frame 26 and the second winding frame 27 are formed of an integral material when the substrate 25 is molded of synthetic resin. On the peripheral walls 26a and 27a of these winding frames, a number of slits that are long in the vertical direction may be provided in the circumferential direction as necessary in order to stop the slippage of the optical fiber. Furthermore, the planar shape of the winding frame may be a perfect circle, or may be an ellipse having a curvature that is greater than the safe curvature.
Further, the peripheral walls 26a and 27a of the winding frame are formed separately from the substrate 25, and are provided with arbitrary joining means, for example, a plurality of holes in the substrate 25 at predetermined positions of the substrate 25, and a large number of extending from the winding frame side. You may mount | wear with the contact | adherence state using the means to fit a nail | claw, or using an adhesive agent.
Reference numeral 28 denotes a plurality of jumping pawls that are allocated in advance to the upper positions of the peripheral walls 26a, 27a in order to prevent the optical fibers 44, 45, 46, 47 attached to the peripheral walls 26a, 27a from jumping up. The catch pawl 28 is provided in an overhanging shape with an integral material from the upper position of the peripheral walls 26a and 27a in the radial direction. As is well known, the lower substrate 25 of the overhanging pawls may be provided with a through-hole for extracting a mold (core) necessary for molding, as is well known.

  The first winding frame 26 and the second winding frame 27 that are juxtaposed on the surface of the substrate 25 as described above will be described. These juxtaposed states are circular arcs (the outer circumferences of the peripheral walls 26a and 27a) drawn with a radius that provides the above-mentioned safe curvature around the center point positions 26f and 27f of the first and second winding frames 26 and 27, respectively. The center point positions 26f and 27f of the first winding frame 26 and the second winding frame 27 are brought close to each other so that a part of the first winding frame 26 and the second winding frame 27 overlap each other 267 in the radial direction. As a matter of course, when arranged in this manner, the width dimensions of the entire left and right sides of the first winding frame 26 and the second winding frame 27 become narrower and the exclusive area becomes smaller as is apparent from FIG.

  With respect to the surface of the substrate 25, the first winding frame 26 and the second winding frame 26 are located far from the outer peripheries of the peripheral walls 26a and 27a having small curvatures of the first winding frame 26 and the second winding frame 27, respectively. In order to surround the frame 27, recoil walls 29b for restricting the outer peripheral position of the optical fiber are arranged in a self-supporting manner at a plurality of positions at appropriate intervals. The position where the outer peripheral position regulating blocking walls 29b are arranged in parallel is that the optical fiber is arranged with a large curvature with a large gap from the peripheral walls 26a, 27a of the first winding frame 26 and the second winding frame 27. Selected to allow. The upper part of the above-mentioned blocking wall 29b is provided with a corresponding first winding frame 26 and a claw 29a extending toward the second winding frame 27 so that the optical fiber does not jump upward. It is.

  The arrangement of the plurality of claws 29a and the plurality of jumping claws 28 is a plane shape as shown in FIG. 1, and the tips of the jumping claws 28 and the tips of the plurality of claws 29a are interleaved with each other. It is arranged in a state. This means that when the optical fibers 44, 45, 46, 47 are wound at positions close to the respective peripheral walls 26a, 27a of the first winding frame 26 and the second winding frame 27, the plurality of jumping pawls 28 When the optical fiber has a large radius of curvature and is wound at a position distant from each of the peripheral walls 26a and 27a, the lift is prevented by the plurality of claws 29a, and the optical fiber is straight as shown in FIG. In the state or a slightly curved state, they are arranged alternately so that they cannot jump out upward.

Reference numeral 58 denotes a peripheral wall for preventing the optical fiber from escaping toward the outside when the optical fiber is arranged with a large curvature, and the inner surface is curved within the range of the safe curvature. The peripheral wall 58 may be formed integrally with the plurality of outer peripheral position regulating jump walls 29b, which are provided independently as needed.
As described above, by arranging the arrangement and configuration of the first winding frame 26 and the second winding frame 27 as shown in FIG. 1, the planar exclusive area can be remarkably reduced. Thereby, the outer shape of the case can be made smaller and more compact.

Reference numerals 34 and 35 indicate the existence of known first and second splice holders, and the known first and second mechanical splices 36 and 37 for connecting the optical fibers 44 and 47 and 45 and 46, respectively, are attached and detached. It is for holding freely. The arrangement position is selected above an intermediate position between the first winding frame 26 and the second winding frame 27 in FIG. 1 so as not to get in the way.
In the substrate 25, the corner where the optical adapter 20 disposed at substantially the same height as the surface of the substrate 25 is present lacks the substrate 25, and the optical connector 21 b attached to the free end of the optical fiber 47 is optically connected. It can be detachably connected to the receiving port 22 of the adapter 20.

  Reference numeral 80 denotes a WDM filter holder for holding and fixing a WDM (Wavelength Division Multiplexing) filter, which is provided in the optical fiber housing 24. Note that the WDM filter uses, for example, optical signals with wavelengths of 1310 nm and 1490 nm for upstream signals and downstream signals as communications, and 1550 nm for downstream signals of television signals when considering a bidirectional optical transmission line. When the optical signal is transmitted, the optical signal having the above wavelength is separated by interposing between an optical fiber and a device installed on the subscriber terminal side such as the optical receiver of the present application. Waves and composites.

  The detailed structure of the WDM filter holder 80 of the present application will be described. As shown well in FIG. 7, in the embodiment of the present application, a first WDM filter is formed by a pair of locking pieces 181 and 181 which are provided so as to face each other with a first predetermined interval from the upper surface of the substrate 25. A first support portion 81 in which at least two sets of support portions 81a for detachably holding 38B are disposed at predetermined intervals on the center line at the first predetermined interval; and the substrate 25. A pair of locking pieces 182 and 182 that are opposed to each other at a second predetermined interval wider than the first predetermined interval from the upper surface and project higher from the first support portion 81 so as to be separated from the upper surface of the substrate. And a second support portion in which at least two sets of support portions 82a for detachably holding the second WDM filter 38A are disposed at predetermined intervals on the center line at the second predetermined interval. 2 and the center line of the first support part 81 and the center line of the second support part 82 are arranged on the same line, so that the first WDM filter 38B When the second WDM filter 38A is clamped and held on the support portion 81, and the second WDM filter 38A is clamped and held on the second support portion 82, the first WDM filter and the second WDM filter are attached to the substrate. Arranged in a direction orthogonal to the substrate 25 so as not to overlap each other in the orthogonal direction.

Locking claws 181a and 181a are formed at the front ends of the respective pair of locking pieces 181 and 181 in the first support portion 81 so as to face each other inwardly, and the locking is the first predetermined interval. An interval (L1) between the tips of the claws is formed to protrude so as to be slightly smaller than the outer diameter of the first WDM filter, and the first claws 181a and 181a are arranged in the downward direction in the first direction. The contact surfaces 181b and 181b corresponding to the outer periphery of one WDM filter are respectively formed.
Next, locking claws 182a and 182a are formed at the tip portions of the respective pair of locking pieces 182 and 182 in the second support portion 82 so as to face each other inwardly, and at the second predetermined interval. The interval (L2) between the tips of the locking claws is configured to protrude so as to be larger than the interval (L1) and slightly smaller than the outer diameter of the second WDM filter, and the locking claws 182a. , 182a is formed with contact surfaces 182b and 182b corresponding to the outer periphery of the second WDM filter.
In general, the WDM filter is formed in a cylindrical shape, and diameters of Φ3 mm and Φ5.5 mm are generally known. The first support portion 81 in the present application corresponds to the first WDM corresponding to Φ3 mm. The second support portion 82 is for holding and holding the filter 38B. The second support portion 82 is for holding and holding the second WDM filter 38A corresponding to Φ5.5 mm. The contact surfaces 181b, 181b, The contact surfaces 182b and 182b are formed to have a predetermined R so as to correspond to the outer peripheries thereof.

When the first WDM filter 38B is attached, the locking pieces 181 and 181 are pushed outward from the distance (L1), and are moved over the locking claws 181a and 181a to be press-fitted into the support portion 81. The pieces 181 and 181 are clamped and held by the elastic force to return them. At this time, if the locking pieces 181 and 181 are formed so that the lower surface of the first WDM filter 38B is in contact with the upper surface of the substrate, the position of the first WDM filter 38B from the upper surface of the substrate is fixed and reliable. Held by the first support portion 81. The removal of the WDM filter may be performed by reversing the above procedure, and the first WDM filter is detachably held by the first support portion 81.
Next, when the second WDM filter 38A is mounted, the locking pieces 182 and 182 are pushed outward from the distance (L2) and are moved over the locking claws 182a and 182a to be press-fitted into the support portion 82. The locking pieces 182 and 182 are clamped and held by the elastic force to return to the original state. At this time, if the lower surface of the second WDM filter is brought into contact with the receiving surfaces 181c and 181c formed at the tip portions of the first locking pieces 181 and 181, the substrate of the second WDM filter The position from the upper surface is fixed and securely held by the second support portion 82. The removal of the WDM filter may be performed by reversing the above procedure, and the second WDM filter is detachably held by the second support portion 82.

  Further, when the first WDM filter 38B is sandwiched and held by the first support portion 81, the first WDM filter 38B restricts movement in the surface direction formed by the substrate 25. When the first WDM filter 38B is attached by forming the third support portion 83 formed of the formed pair of convex pieces 183 and 183, the lower surface portion of the first WDM filter 38B is a third portion. If it is configured to be fitted to the support portion 83, the first WDM filter is more stably held on the first support portion 81.

Next, a description will be given of an introduction path in which an optical fiber can be introduced from the outside of the case main body toward the optical fiber housing portion while penetrating the side plate of the case main body.
As shown in FIGS. 3 to 5, the introduction path 60 is formed through the side plate member 3 g (side plate 3 a). The inside of the case in the introduction path 60 has a shape in which a part of the substrate 25 is recessed and includes a passage 61 along which the optical cable 41 and the like are provided. A slope passage R1 that gently rises in order to guide the optical fiber 44 and the like to enter and exit is formed.

Reference numeral 62 denotes a receiving portion for receiving the optical cables 41 and 42 introduced into the introduction path 60, and is provided inside the introduction path 60 (inside the case). Reference numerals 71b and 72b denote elastic members for elastically receiving the optical cable, respectively.
Reference numeral 63 denotes a pressing member for pressing the optical cable to make the optical cable immovable at a position on the opposite side of the optical cable from the receiving portion, and with respect to a part of the case main body at the side position of the slit. And pivotally attached. Reference numeral 64 denotes a pivot portion protruding from the pressing portion 63 in the longitudinal direction. Denoted at 65 is a pivot shaft formed at the end of the pivot portion 64, and is pivoted to pivot holes 125, 125 (one not shown) formed in the substrate 25. The rotation range of the pressing member 63 is in a retracted position away from the slit 110 position in the open state (see FIGS. 3B, 4B, and 5B), and the optical cable is in the pressed position. The pressing position (see FIG. 3A, FIG. 4A, and FIG. 5A) that brings the optical cable 41 and the like into a stationary state by being pressed against the 41 and the like is reached.
Reference numeral 66 denotes an operation unit that is erected integrally with the pressing member 63 so as to rotate the pressing member 63. 67 denotes a complementary member attached to the pressing member 63 so as to be movable together. The size of the complementary member 67 is formed so as to block the slit 110 at the pressing position of the pressing member. Elastic members 71a and 72a are disposed on the contact surface of the optical member of the pressing member 63 at symmetrical positions on both sides and spaced apart from each other. The elastic members 71a and 72a are formed of different materials so as to correspond to the optical cables 41 and 42, respectively. However, the elastic members 71a and 72a may be formed of an integral material. Reference numeral 74 denotes a screw as a means for fixing the pressing member 63 to the receiving portion 62, and the pressing member 63 can be brought into a stationary state by being pressed against the optical cable 41 or the like with an arbitrary pressing force. Reference numeral 68 denotes a partition wall formed in the passage 61 for guiding the optical cables 41 and 42 to predetermined positions.

  Next, the engaging means 84 provided between the substrate 25 and the case body 3 will be described (appears well in FIGS. 1, 2, 8, and 9). The hooking means 84 is provided in the case main body 3 so as to detachably fix the case main body 3 and the substrate 25 in a state where the base plate 25 is covered with the opening 3e of the storage space 5 so as to be freely opened and closed. A latch member 93 and a latch member 85 provided on the substrate 25 are provided.

The latch member 93 will be described. 94 denotes a latching portion for latching the wide width portion 90 of the latching member 85, and two are provided toward the direction of projecting from the wall 3 c of the case body 3 as clearly shown in FIGS. It has been. Reference numeral 97 denotes side plates for supporting the latching portions 94, 94, respectively, and is formed of an integral material with the latching portion 94. Reference numeral 95 denotes a gap between the two hooking portions 84, 84, and the width W <b> 1 is dimensioned so that the contact portion 89 can enter the wall 96 in the mounted state. Reference numeral 98 denotes a space for positioning the wide portion 90 of the hooking member 85 in the mounted state with the hooking member 85.
Thus, the latch member 93 has two latch portions 94, 94 projecting from the wall of the case body on both sides of the gap 95.
In addition, the latch member 93 is illustrated as being molded with the case body 3 as an integral material. However, it may be formed separately from the case body 3 and attached to the case body 3 in close contact.
Furthermore, in the drawing, the description has been given of the case where the latching member 93 is erected from the back side plate 3d of the case body. However, the latching member 93 has two latching portions 94, 94 projecting on both sides of the gap 95. As such, it may be formed by projecting directly from the top plate 3c of the case body.

The engaging member 85 will be described.
As shown in FIGS. 8 and 9, the hooking member 85 has a U-shaped overall cross section, and the base portion 85 a is connected to the substrate 25. Reference numeral 86 denotes a knob for operating with a finger during mounting or removal work, and is provided at the free end 85b. Reference numeral 87 denotes a curved portion positioned between the base portion 85a and the knob portion 86 so that the knob portion 86 has elasticity so as to bend toward the base portion 85a.
Reference numeral 90 denotes a wide portion for engaging with the engaging portions 94, 94 of the engaging member 93. In the mounted state shown in FIGS. 9C, 9D, 9E, the engaging portions 94, Located below 94. The width dimension W2 of the wide width portion 90 is formed wider than the width dimension W1 of the gap 95, and is latched by the latching portions 94, 94 as shown.
Reference numeral 89 denotes an abutting portion 89 that abuts against the latching portions 94, 94 in the mounted state, and the width dimension W 4 is formed to be narrower than the width dimension W 1 of the gap 95.

Next, the elasticity of the curved part 87 in the engaging member 85 is as follows. That is,
In a normal state, as shown in FIG. 9A, the dimension S between the base part 85a and the contact part 89 is larger than the dimension S1 between the base part 85a and the wall 96 in the mounted state.
In the mounting process, as shown in FIG. 9B, the wide portion 90 is pushed by the latching portion 94 and bent toward the base portion 85a (in the direction of the arrow 91 shown in FIG. 9A). After passing through the latching portion 94, the contact portion 89 enters the gap 95 and is made elastic so as to hit the wall 96, as shown in FIG. 9C.
In addition, when the width dimensions W3 and W3 of the overhang portions on both sides in the wide width portion 90 are arbitrarily increased (larger), the engagement with the hook portions 94 and 94 can be made stronger. Even if the width dimensions W3 and W3 of the overhanging portion are lengthened, the length direction is a direction that intersects the plate thickness of the latching member 93, and therefore there is no possibility of adversely affecting the elasticity of the latching member 93.
Further, the engagement depth of the engagement means 93 can be made stronger by arbitrarily increasing the cut depth H of the gap 95 in the engagement member 93.

Installation work of the optical receiver 1 will be described using the above configuration.
First, preparations such as removal of the coating of the two-core optical cable 41 and the optical cable 42 and adhesion between the optical fiber 47 and the optical connector 21b are made. Furthermore, first and second mechanical splices 36 and 37, a WDM filter, and the like are prepared as necessary.
In addition, since a tool that is generally known is used in the optical fiber connection work, the optical fibers 44, 45, 46, and 47 from which the coating has been removed must be relatively long. For example, it is desirably 50 cm or more. Depending on the circumstances of the worker, it may be more than 100cm.
When ready, optical fibers 44 and 46, 45 and 47, respectively, using connection means (which may be any other known connection means) utilizing the first and second mechanical splices 36 and 37 that are generally known. Or connect a WDM filter.

After the optical fibers are connected as described above, as shown in FIGS. 1 and 2, the extra length optical fibers (excessive long optical fibers) 44, 45, which are in the form of loops, 46 and 47 must be stored neatly in the optical fiber housing 24.
The operation of accommodating the extra length optical fiber and the operation of fixing the optical cable 41 will be described in detail below.

First, the operation unit 66 is picked with a finger and moved in the direction of the arrow 77 shown in FIGS. 4 (A) and 5 (C), as shown in FIGS. 3 (B), 4 (B), and 5 (B). The pressing member 63 is opened (retracted position).
Next, the middle of the optical cable 41 that continues to the outside for a long time is pinched, the optical cable is inserted into the slit in a lying state, and the optical cable 41 is received by the receiving portion of the introduction path 60 as shown in FIG. Leave it at 62. Further, the optical cable 42 is similarly placed in the receiving portion 62. The extra length optical fiber 44 or the like is accommodated in the case in a state of penetrating the side plate 3a of the case main body.
Next, the pressing member 63 is moved in the direction of arrow 78 shown in FIG. 4 (B) to close the pressing member 63 to a state (pressing position) as shown in FIGS. 4 (A) and 5 (A). . Then, by screwing the fixing means including the fixing screw 74, the pressing member 63 presses the optical cable 41 and the like through the elastic members 71 and 72, thereby bringing the optical cable 41 and the like into an immobile state and holding them accurately. Become. In this state, the complementary member 67 attached to the pressing member 63 closes the slit 110 of the case body side plate 3a to complement the side plate 3a, so that it is possible to prevent dust from entering the case.

Next, as shown in FIGS. 1 and 2, the extra length portion of the optical fiber is wound around the two winding frames 26 and 27 and accommodated. In that case, the optical fiber can be wound clockwise or counterclockwise around the two reels 26, 27, stored in a small volume, or can be selected and used in a number of ways. Even when the extra length of the fiber is large and the loop is long and the length of the loop is appropriate and uncertain, it is possible to wind the optical fiber with a good finish to obtain a good finish.
Moreover, even if the winding method of the above-described embodiment is loosely wound or tightly wound around the reels 26 and 27, it does not become less than the safe curvature of the reel. Even if not, it will be possible to wind with a curvature that is more than the safe curvature.
As described above, after the extra length optical fiber is accommodated in the accommodating portion 24, the optical receiving portion 13 is accommodated in the case main body 3, and the substrate 25 including the optical fiber accommodating portion 24 is fixed to the case main body 3.

The operation of fixing the substrate 25 to the case body 3 will be described in detail.
First, the substrate 25 is held by hand while the knob portion 86 of the engaging member 85 provided on the substrate 25 is bent toward the base portion 85a with a finger. The substrate 25 is put on the opening of the case body 3 in the direction as shown in FIG. At that time, the side plate member 3g is adjusted to a position (see FIG. 5) where the side plate member 3g is fitted into the notch 103 formed in the connection board 3a of the case main body. While holding the substrate 25 by hand, the hooking member 84 of the substrate 25 is moved in the direction of the hooking member of the case body 3 (in the direction of arrow 100 shown in FIG. 9A).
Then, as shown in FIG. 9B, the wide portion 90 is pushed in a state of being bent toward the base portion 85a. When pushed further in the direction of the arrow 100, the wide portion 90 passes through the latching portion 94 and reaches the position shown in FIG. 9C. Thereafter, the finger is released from the picking portion 86. Then, the contact portion 89 elastically moves in the direction of returning to the original shape (the direction of the arrow 101 shown in FIG. 9B), and the contact portion 89 enters the gap 95 as shown in FIG. 9C. It enters and comes into contact with the wall 96, and the engagement is completed. In this engaged state of the engaging means 84, the wide portions 90, 90 and the engaging portions 94, 94 are engaged as shown in FIGS.
As described above, the picking portion 86 is picked with a finger and the substrate 25 is held and the fixing work is performed, so that the case body 3 and the substrate 25 can be fixed firmly, and the optical fiber of the optical fiber housing portion 24 may be damaged. There is no.

As described above, the optical receiver 13 is accommodated in the case main body 3, the extra length optical fiber is accommodated in the accommodating portion 24, and the substrate 25 having the optical fiber accommodating portion 24 on the surface is opened on the case main body 3. After being fixed in a state where it can be freely opened and closed, it is used by a normal usage method. For example, the case main body 3 is covered with a lid (not shown) and mounted in a house as usual.
After that, for example, the media converter 50 and the personal computer 51 in the house 54 are connected to the optical cable 42 drawn out from the entrance 6 to use the optical signal. Further, a set-top box 52 and a television receiver 53 are connected to the coaxial cable drawn from the connection terminal 16 of the entrance 9.

Next, an operation for removing the substrate 25 from the case body 3 will be described.
First, the lid that covers the case body 3 is opened, and the opening 3e of the case body is opened as shown in FIG. The substrate 25 is held by hand while the knob 86 of the engaging member 85 provided on the substrate 25 is bent with a finger, and is moved in the direction opposite to the case where the substrate 25 is mounted (the front direction in FIG. 1). Then, the hooking means 84 is reverse to the case where it is mounted, that is, as shown in FIGS. 9C, 9B, and 9A, the hooking is released and the case main body 3 and the board 25 are separated from each other. Can be removed.
As described above, the hook 86 is removed by holding the substrate 25 with the finger, and the case body 3 and the substrate 25 can be gently detached from each other, so that the optical fiber of the optical fiber housing portion 24 can be removed. There is no risk of damage.

Next, FIG. 10 which shows an example different in the point which does not attach a supplementary member with the press member of FIGS. 3-6 is demonstrated. In FIG. 10, the same reference numerals as those in FIGS. 3 to 6 are assigned to the portions that are considered to have the same or equivalent configuration as those in FIGS. 3 to 6. Description is omitted. (Also, in the following figures, the same concept is applied in order, and the same reference numerals as those in FIGS.
According to the pressing member shown in FIG. 10, in the same manner as described with reference to FIGS. 3 to 6 described above, only a slight operation for rotating the pressing member 63 in the introduction path 60 is required during the optical fiber accommodation operation. Therefore, the optical cable can be smoothly inserted into the introduction path 60 through the slit 110 because the retracted position can be set away from the slit 110 (see FIGS. 10A and 10B). Furthermore, after the optical fiber 44 and the like are accommodated in the optical fiber accommodating portion 24, the optical cable 41 and the like in the introduction path 60 are fixed to each other by a simple operation of rotating the pressing member at the retracted position to the pressing position. can do.
Next, FIG. 11 shows a different example in that the side plate member 3g and the projecting opening 106 of FIGS. 3 to 6 are not formed of an integral material with the substrate 25, and that the pressing member is not provided with a complementary member and an operation portion. Is.

The front view which shows the positional relationship of a case main body, the optical receiving part accommodated in a case, an optical fiber accommodating part, and an introduction path (in addition, an introduction path shows a prior art example). The disassembled perspective view which shows the positional relationship of a case main body, the electronic device accommodated in a case, an optical fiber accommodating part, and an introduction path (in addition, an introduction path shows a prior art example). It is a perspective view which shows the positional relationship of a board | substrate, an optical fiber accommodating part, and an introduction path, (A) shows the state which the press member in the introduction path closed, (B) shows the state by which the press member in the introduction path was open | released. . 3 is a front view as viewed from the direction of reference symbol IV in FIG. 3 (the presence of the case body is indicated by a one-dot chain line), (A) shows a state where the pressing member is closed, and (B) shows a state where the pressing member is opened. . It is a figure for demonstrating the positional relationship of the receiving part in an introduction path, a press member, and two series of optical cables, (A) is the state which closed the press member, (B) is the state which opened the press member, ( C) shows a front view. The expansion perspective view of a press member. The elements on larger scale of a WDM filter holder. (A) is the sectional view on the AA line in FIG. 1, (b) is the figure seen from the BB line in FIG. 1, (c) Shows a specific dimension. It is a figure for demonstrating a latching means, Comprising: The exploded perspective view about the latching means of the left side among the two latching means shown by FIG. 1, (A) is a perspective view for demonstrating the latching member with which the board | substrate was equipped. (B) is a perspective view for explaining a latching member provided in the case body. The IX-IX sectional view taken on the line in FIG. 1 with a partially broken view for explaining the engaging or disengaging operation of the engaging means. (A) is a diagram showing the state before mounting (normal state), (B) is a diagram showing the mounting process, (C) is a diagram showing after the mounting, (D) is a cross-sectional view taken along the line DD in FIG. 9 (C). (E) is the EE sectional view taken on the line in FIG.9 (C). FIGS. 3A and 3B are diagrams for explaining an example different from the pressing member in FIGS. 3 to 6, wherein FIG. 3A is a perspective view showing a positional relationship between a substrate, an optical fiber housing portion, and an introduction path, and FIG. The front view seen from X direction (existence of a case main body is shown with a dashed-dotted line), (C) is an expansion perspective view of a press member. It is a figure for demonstrating the example different from FIGS. 3-6, (A) shows the state which the press member closed, (B) shows the state which the press member was open | released, (C) is a press member. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Optical receiver, 3 ... Case main body, 3a ... Connection board, 3b ... Side plate, 3c ... Top plate, 3d ... Back side plate, 3e ... Opening, 3f ... Open edge, 3g ... side plate member, 5 ... storage space, 6 ... entrance / exit, 8/9 ... output terminal projection, 13 ... light receiving part, 17 ... light Fiber, 20 ... Optical adapter, 21 ... Connector, 24 ... Optical fiber housing, 25 ... Substrate, 26 ... First winding frame, 27 ... Second winding frame, 28. ..Clip claw, 34 ... first splice holder, 35 ... second splice holder, 36 ... first mechanical splice, 37 ... second mechanical splice, 38 ... WDM filter holder, 39 ... clamping device, 41 ... optical cable, 42 ... optical cable, 44-47 ... optical fiber Iva, R1 ... optical fiber path, 58 ... peripheral wall, 60 ... introduction path, 61 ... passage, 62 ... receiving part, 63 ... pressing member, 64 ... pivotally attached Part, 65 ... pivot shaft, 66 ... operation part, 67 ... complementary member, 70 ... elastic member, 71, 72 ... elastic member, 74 ... screw, 80 ... WDM filter holder, 80 ... WDM filter holder, 84 ... engagement means, 85 ... engagement member, 86 ... picking portion, 87 ... bending portion, 89 ... contact portion, 90- ..Wide part, 93 ... Hanging member, 94 ... Hanging part, 95 ... Gap, 96 ... Wall, 106 ... Projection port, 106a ... Bulk, 103 ... Notch part, 110 ... slit, 125 ... pivot attachment hole, 181 ... locking piece, 181a ... locking claw, 181b ... contact , 181c ... supporting surface, 82 ... second support portion, 182 ... engaging piece, 182a ... locking claw, 182b ... abutment surface

Claims (3)

A case body having a storage space;
An optical receiver that is stored in the storage space 5 and converts an optical signal input from the outside into an electrical signal and outputs the electrical signal;
An optical fiber housing portion that is housed on the front side of the housed optical receiver and has a winding frame in which the front side is opened to wind the extra length optical fiber with a predetermined curvature;
In a state of penetrating the side plate of the case body, the optical fiber can be introduced from the outside of the case body toward the optical fiber housing part, and an introduction path is provided.
Furthermore, a receiving part for receiving an optical cable inserted through the introduction path is provided inside the introduction path,
In the optical receiver provided with a pressing member for pressing the optical cable and making the optical cable immovable at a position on the opposite side of the optical cable with the receiving portion,
An optical receiver characterized in that a slit is formed between the peripheral surface of the introduction path and the opening edge of the side plate of the case body so that the optical cable can be inserted into the introduction path in a lying state.   The pressing member is pivotally attached to a part of the case main body at a side position of the slit, and the rotation range is in a retracted position away from the slit position in the open state. 2. The optical receiver according to claim 1, wherein the optical receiver is in a pressed position where the optical cable is brought into a stationary state by being pressed against the optical cable. 3. The optical receiver according to claim 1, wherein a complementary member having a size that closes the slit is attached to the pressing member so as to be movable in the pressing position.

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