JP4886360B2 - Optical receiver - Google Patents

Description

According to the present invention, an optical receiver having O / E conversion means for converting an optical signal into an electric signal that can be received by a TV receiver or the like is accommodated in a storage space of a case body mounted on a building such as a house, and the case The present invention relates to an optical receiver in which an opening of a main body is fixed in a state in which a substrate having an optical fiber accommodating portion on its surface is covered in an openable / closable manner.

A conventional optical receiver will be described with reference to FIGS. 1 and 2 show an embodiment of the present invention. In these figures, configurations denoted by reference numerals 1 to 29 and reference numerals 39 to 60 are conventionally known configurations (for example, JP-A-2005). -24760). 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 25 denotes a substrate for partitioning the housed optical receiver 13 and the optical fiber housing 24 provided on the front side thereof. The optical fiber accommodating portion 24 is for accommodating the extra length optical fibers 44, 45, 46, 47 and is provided on the surface of the substrate 25. Further, in order to wind the extra length optical fibers 44, 45, 46, 47 with a predetermined curvature, the optical fiber accommodating portion 24 is provided with winding frames 26, 27, a peripheral wall 58 and the like whose front side is open. .
The case body 3 is fixed to the opening 3e with the substrate 25 covered. The fixing is detachably fixed using a screw member as a hooking means so that the substrate 25 can be removed (see, for example, Patent Document 1).

JP-A-2005-24760 Japanese Utility Model Publication No. 57-108390

In the conventional optical receiver, when the substrate 25 provided with the optical fiber housing portion is fixed to the case main body during the operation of handling the optical fiber, there is an inconvenience that the screw member must be screwed. .
Further, when screwing, there is a problem in work that the optical fiber wound around the optical fiber housing portion 24 must be screwed carefully so as not to be damaged by the screwing tool.
Further, when the substrate 25 and the case main body 3 are removed when the optical receiver 13 is inspected or repaired, the same problem occurs.

Therefore, in the applicant company, as a means for fixing the substrate 25 and the case body 3, a known engagement provided with a perforation 32 and an L-shaped key-shaped portion 24 as shown in FIG. It was considered to use means (for example, see Japanese Utility Model Publication No. 57-108390). For example, a hole 32 is provided on the case body 3 side, and a piece 23 and an L-shaped key portion 24 are provided on the substrate 25 side. Then, as shown in FIG. 10, the substrate 25 and the case main body 3 were tried to be fixed by press-fitting the L-shaped key-shaped portion 24 into the perforation 32 and engaging them.
However, in the operation of fixing the substrate 25 to the case body 3, the L-shaped key-shaped portion 24 is pressed with a strong force to press-fit the hole 32, so that the engagement between the drilled and the L-shaped key-shaped portion is completed. Momentarily, the substrate 25 hits the case body 3.
Thereby, an impact is applied to the optical fiber of the optical fiber housing portion 24 provided on the surface of the substrate 25. There is a possibility that a part of the optical fiber wound around the reel floats up or sways and swells to damage the optical fiber. Furthermore, there is a problem that the optical fiber may come off from the winding frame, and the loop-shaped optical fibers may be entangled with each other to damage the optical fiber.
Further, there is a problem that it is difficult to remove the substrate 25 from the case body 3 after the engagement.
In addition, the code | symbol used in description regarding the said patent document 2 (code | symbol used in FIG. 10 of drawing attached to this application) uses the characteristic code | symbol used in patent document 2, and this invention It has nothing to do with the symbols used in the [Best Mode for Carrying Out the Invention] column.

The purpose of the present application is to convert an optical signal drawn from the outside into an electrical signal by an optical receiving unit housed in the housing space of the case body, and to output an extra length optical fiber. It is an object of the present invention to provide an optical receiver capable of detachably fixing a substrate having an optical fiber housing portion to a case body.
Another object is to fix the substrate to the case body by a simple operation of moving the engagement member in the engagement means to the engagement position with respect to the engagement member while bending the engagement member with the finger and releasing the finger. It is intended to provide an optical receiver that can be used.
In addition, an object of the present invention is to provide an optical receiver in which the extra length optical fiber provided on the substrate is not subjected to the impact due to the engagement during the fixing operation and the optical fiber is not damaged.
Another object is to provide an optical receiver that does not damage the optical fiber without damaging the extra length of the optical fiber wound around the optical fiber housing portion of the substrate even when the substrate is removed from the case body. It is what.
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. The optical receiver 13 and a substrate 25 for partitioning the optical fiber receiver 24 provided on the front side of the optical receiver 13 are provided. The optical fiber receiver 24 is provided on the surface of the substrate 25, and an extra length optical fiber is provided. And the case body 3 in a state in which the substrate 25 is covered with the opening of the storage space 5 so as to be openable and closable. In the optical receiver provided with the engaging means 84 between the substrate 25 and the case main body 3 in order to detachably fix the substrate 25, the engaging means 84 is provided on the case main body 3. Stop member 93 and the substrate 5 is provided, and the hooking member 93 is protruded from the wall of the case body in a state in which two hooking portions 94, 94 are arranged on both sides of the gap 95, On the other hand, the engaging member 85 has a U-shaped overall cross-sectional shape, the base portion 85a is connected to the substrate 25, and the free end portion 85b includes a knob 86 for operating with a finger, A bending portion 87 is provided 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. In the meantime, when the base plate 25 is mounted on the case body 3, the portion 90 positioned below the hooking portions 94, 94 is formed wider than the width of the gap 95, and in the mounting state, the hooking portion is formed. 94, the portion 89 that contacts the 94 is shaped to be narrower than the width of the gap 95. In the normal state, the elasticity of the bending portion 87 is such that the dimension between the base portion 85a and the contact portion 89 is wider than the dimension S1 between the base portion 85a and the wall 96 in the mounted state, In the process, the wide portion 90 is pushed by the latching portion 94 to bend toward the base portion 85a, and after the wide portion 90 passes through the latching portion 94, the contact portion 89 enters the gap 95 to enter the wall. In the engaged state of the engaging means 84, the wide portion 90 and the engaging portions 94, 94 are engaged.

Further, in the present invention, when the substrate is fixed to the case body, the hooking member in the hooking means is moved to the hooking position with respect to the hooking member while being bent by the finger, and the wide part is hooked to the hooking portion by releasing the finger. Since it did in this way, there exists an effect on the operation | work which can adhere with simple labor.
Moreover, during the fixing operation, the case main body and the substrate can be gently fixed, since the substrate can be held while holding the substrate while bending the knob of the engaging member provided on the substrate with a finger. There is a safety effect of preventing an optical fiber damage accident without applying an impact due to engagement to the extra length of the optical fiber wound around the optical fiber housing portion of the substrate.

  Furthermore, in the present invention, when the optical receiver housed in the case body is repaired or inspected, when removing the board from the case body, the board is held by hand while bending the knob of the hooking member provided on the board with a finger. Since the engagement is released while the substrate is held as it is, the substrate including the optical fiber housing portion can be gently removed from the case body. Therefore, there is a safety effect to prevent a damage accident that damages the optical fiber.

Furthermore, in the present invention, since the wide portion of the engaging member projects in a direction intersecting the elastically deflecting direction and engages with the engaging portion, the thickness of the engaging member is flexibly bent by the fingertip. Because it can be thinned
When the fixing operation or removing operation of the case body and the substrate is performed, there is an operational effect that the knob can be bent and fixed or removed by a relatively light force.

  Furthermore, in the present invention, even if the thickness of the hooking member is reduced as described above, in the hooking state of the hooking means, the hooking direction of the wide portion and the hooking portion is the plate thickness direction of the hooking member. Since the engagement is performed in the intersecting direction, the engagement portion between the wide portion and the engagement portion can be made large and can be engaged firmly. This has an effect in use that can firmly maintain the adhesion between the case main body and the substrate.

  Embodiments of the present invention will be described below with reference to the drawings. 1 to 9, FIG. 1 and FIG. 2 are a front view and an exploded perspective view showing a positional relationship between the case main body 3 in the case 7, and the light receiving unit 13 and the optical fiber housing unit 24 housed in the case. It is. In these drawings, the configuration of the insertion path 60 is to display the insertion path related to the prototype before filing the application at the applicant company. Embodiments will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, reference numeral 3 denotes a case main body in the optical receiver 1 installed near an entrance of an office building or a condominium, as is well known, and an arbitrary lid not normally shown in the drawings. It can be opened and closed freely. 4a indicates a stopper of the lid.
The case body 3 is squarely arranged with a top plate 3c, a connection board 3a arranged in parallel with the top board 3c, and two side plates 3b arranged between the top board 3c and the connection board 3a. And a back side plate 3d provided so as to close one surface of the square space 5 surrounded by the top plate 3c, the connection board 3a and the two side plates 3b. The connection board 3a of the case body 3 is formed of, for example, a body part including the bottom 3d and the side part 3b and a plastic material integrally or by combining different materials. The front surface of the case body 3 is provided with a relatively large opening 3e for operating the optical receiver 13 and the optical fiber 44 in the case from the outside of the case, and further, with respect to the opening 3e of the case body 3 The case 7 is configured by covering the lid body (not shown in the figure) 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.
Reference numerals 8 and 9 provided on the connection board 3a denote output terminal protrusions for taking out known television signals.

  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, on the upper surface of the substrate 25 near the entrance / exit 6 of the optical cable, the entrance / exit of the two-core optical cable 41 and the two-core (or single-core) optical cable 42 with a large curvature from the entrance / exit 6 toward the winding frame 27 is guided. A passage R1 is formed with a slope that slowly rises.
A clamping tool 39, which will be described later, is disposed in the vicinity of the entrance 6 in order to elastically sandwich the optical cables 41, 42 from above and below, and the inserted optical cables 41, 42 are detachably held.

Next, the insertion path 60 provided with the optical cable insertion hole 6 provided in the direction protruding from the connection board 3a shown in FIGS.
The insertion path 60 has a shape in which a part of the substrate 25 is recessed, and the lower surface 62c along which the optical cables 41 and 42 are laid (the optical cable toward the upper surface of the substrate 25 at the back as viewed from the optical cable insertion hole 6). 41) and a groove portion 260 having both side surfaces opposed to each other.
Near the optical cable insertion opening 6 in the groove portion 260, the optical cables 41, 42 from above and below.
In order to sandwich the cable, a clamping tool 39 made of a clamping member provided with elastic members on the upper and lower contact surfaces is disposed, and the inserted optical cables 41 and 42 are detachably held.

  As shown in the perspective view of FIG. 6, the clamping tool 39 shown in this embodiment has a pressing piece 39a whose longitudinal direction is perpendicular to the axis of the optical cables 41 and 42, and one end side of the pressing piece 39a. In order to perform the opening / closing operation of the pressing piece, the operating piece 39b is set up so as to be orthogonal to the pressing piece 39a, and the pressing piece 39a is set up so as to be orthogonal to the pressing piece 39a from one side surface in the longitudinal direction. Side wall 39c. Elastic members 71a and 72a are disposed on the contact surface of the pressing piece 39a of the optical cable at symmetrical positions on both sides with a space therebetween. Although the elastic members 71a and 72a are disposed so as to correspond to the optical cables 41 and 42, the elastic members 71a and 72a may be integrally formed.

  On the other end side of the pressing piece 39a, pivoting pieces 139 and 139 are formed protruding in the longitudinal direction from both sides of the pressing piece. At the tip end portions of the pivot pieces 139 and 139, pivot shafts 139a and 139a are formed outward. The pivot shafts 139a and 139a are pivoted to pivot portions having pivot holes 125 and 125 (one of which is not shown in the drawing) formed in the substrate 25, and are sandwiched by the pivot portions. The tool 39 is attached so that it can be freely opened and closed.

  Next, on the lower surface 62c facing the elastic members 71a and 72a provided in the pressing piece 39a of the clamping tool 39, when the clamping tool 39 is closed, a part of the clamping tool-side elastic members 71a and 72a. And a recess provided with elastic members 71b and 72b is formed at the bottom, and the optical cables 41 and 42 are positioned in the left and right direction (relative to the insertion direction of the optical cable) in the recess, and this position It is comprised so that pinching pressure may be held. In the embodiment of the present application, the elastic members 71b, 72b and the concave portions constitute the contact portions 162, 162. Moreover, although the example which fastens using a fixing screw was shown as a fixing means of the lower surface 62c and the clamping tool 39, it is not specifically limited to this Example. In addition, the abutting portions 162 and 162 are formed so as to be arranged at symmetric positions on both sides so as to correspond to the number of the optical cables 41 and 42, and spaced apart from each other. It is not particularly limited to the examples such as good.

Next, details of the optical cable insertion port 6 in the embodiment of the present application will be described. In this embodiment, the optical cable insertion port 6 is formed so as to be fitted into a cylindrical projecting hole 106 and a notch 103 formed in the connection board 3a so as to be orthogonal to the projecting cylinder 106. It consists of a locking part 107. The optical cable insertion opening 6 is formed with a slit 110 formed by connecting a protruding tube 106 and a locking portion 107 so that the optical cables 41 and 42 can be inserted from a direction orthogonal to the axial direction of the optical cable. Has been.
In addition, on the lower surface of the inner peripheral surface of the protruding cylinder 106, the optical cables 41 and 42 are formed integrally with the protruding cylinder 106 so that the optical cables 41 and 42 are surely guided to the clamping tool 39 and the abutting portions 162 and 162, respectively. If the partition wall 106a is provided and the partition wall 62f is formed between the contact portions 162 and 162, the optical cable can be reliably guided to a predetermined position.
In the embodiment of the present application, the optical cable insertion port 6 is formed integrally with the substrate 25. However, the optical cable insertion port 6 may be formed separately or may be formed on the connection board 3a or a lid (not shown). For example, it is not limited to the examples.

  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 the 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 process, as shown in FIG. 9 (B), 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. 9 (A)). 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.
First, the two-core optical cable 41 is fixed. Further, a two-core (or single-core) optical cable 42 is also fixed as necessary. The fixing operation will be described in detail below.

First, the operation piece 39b of the sandwiching tool 39 is picked with a finger and moved in the direction of the arrow 77 shown in FIG. 4 (A), as shown in FIGS. 3 (B), 4 (B), and 5 (B). Such a sandwiching tool 39 is opened.
Next, the middle of the optical cable 41 that continues to the outside for a long time is pinched and inserted into the entrance / exit 6 provided in the case body 3 from above the slit 110, and as shown in FIG. It is made to exist in the contact part 162 formed in 62c. Further, the optical cable 42 is similarly placed in the contact portion 162.
Next, the clamping tool 39 is moved in the direction of the arrow 78 shown in FIG. 4B, and the clamping tool 39 is closed to a state as shown in FIG. Then, by screwing the fixing means including a fixing screw, the optical cable 41 is clamped by the clamping tool 39 via the elastic members 71 and 72, and the optical cable 41 is accurately held. At this time, since the side wall 39c is formed in the clamping tool 39, when the clamping tool 39 is tightened, the slit 110 formed in the locking portion 107 formed with the optical fiber entrance / exit 62 is completely closed.
Reference numeral 106a denotes a dividing piece for dividing the entrance / exit 6 into two and dividing the left and right optical cables 41 and 42, and is integrally formed with the protruding cylinder 106 in the embodiment of the present application.

Next, as shown in FIG. 1 and FIG. In that case, the optical fiber can be wound clockwise or counterclockwise with respect to the two reels 26, 27, stored in a small volume, or a number of modes of winding can be appropriately selected and utilized. Even when the excess length of the optical fiber is large, and even when it is in a loop shape 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 engaging portion 107 is adjusted to a position (see FIG. 5) such that the engaging portion 107 fits into the cutout portion 103 formed in the connection board 3a of the case main body.
While holding the substrate 25 by hand as described above, the hooking member 84 of the substrate 25 is moved in the direction of the hooking member of the case main body 3 (the direction of the 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 in 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.

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 insertion path (an insertion 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 insertion path, The figure which fractured | ruptured a part of case body side plate (In addition, an insertion path is a prior art example) Show). It is a perspective view which shows the positional relationship of an optical fiber accommodating part, an insertion path, and a board | substrate, (A) shows the state which the clamping tool in an insertion path closed, (B) has the state in which the clamping tool in the insertion path was open | released Indicates. FIGS. 4A and 4B are front views of the substrate as viewed from the direction of the symbol IV in FIG. 3, in which FIG. 3A shows a state where the sandwiching tool is closed, and FIG. 3B shows a state where the sandwiching tool is opened. It is a figure for demonstrating the positional relationship of the clamping tool in an insertion path, and a 2 series optical cable, (A) shows the state which closed the clamping tool, and (B) shows the state which opened the clamping tool. The expansion perspective view of a clamping tool. 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, and 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). The figure for demonstrating a prior art example.

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 part, 5 ... Storage space, 6 ... Optical cable insertion port, 7 ... Case, 8 · 9 ··· output terminal projection, 10 ··· piece, 13 ··· light receiving portion, 14 ··· case (chassis), 17 ··· optical fiber, 20 ··· optical adapter, 21 ··· connector, 24 ··· optical fiber housing portion, 25 ... Substrate, 26 ... First winding frame, 26a ... Peripheral wall, 26f ... Center point position, 27 ... Second winding frame, 27a ... Peripheral wall, 27f ... Center point position, 28 ... Jumping claw, 34 ... First splice holder 35 ... second splice holder, 36 ... first mechanical splice, 37 ... second mechanical splice, 38 ... WDM filter holder, 39 ... holding tool, 39a ... pressing piece, 39b ... operating piece, 39c ... side wall, 41 ... optical cable 42 ... Cable, 44-47 ... Optical fiber, R1 ... Optical fiber path, 50 ... Media converter, 51 ... Personal computer, 52 ... Set top box, 53 ... Television receiver, 54 ... House, 58 ... Perimeter wall, 60 ... Insertion passage, 62c ... lower surface, 62f ... partition wall, 70 ... elastic member, 71, 72 ... elastic member, 73 ... coupling member, 80 ... WDM filter holder, 81 ... first support portion, 82 ... second support portion, 83 ... third Support part, 84 ... engagement means, 85 ... engagement member, 85a ... original part, 85b ... free end part, 86 ... picking part, 87 ... bending part, 89 ...・ Abutting part, 90... Wide part, 93 .. latching member, 94 .. latching part, 95 .. gap, 96 .. wall, 103. 106a ... partition wall, 107 ... locking part, 110 ... slit, 125 ... pivot attachment hole 139 ... Pivoting piece, 139a ... Pivoting shaft, 162 ... Abutting part, 181 ... Locking piece, 181a ... Locking claw, 181b ... Touching surface, 181c ... Receiving surface, 182 ... Locking piece, 182a ... Locking claw, 182b ... abutting surface, 183 ... convex piece, 260 ... groove

Claims (1)

A case body having a storage space;
An optical receiver that is stored in the storage space, converts an optical signal input from the outside into an electrical signal, and outputs the electrical signal;
A substrate for partitioning the stored optical receiving unit and an optical fiber receiving unit provided on the front side thereof;
The optical fiber accommodating portion is provided on the surface of the substrate, and includes a winding frame in which the front side is opened in order to wind the extra length optical fiber with a predetermined curvature,
In addition, in a state where the substrate is removably attached to the opening of the storage space, a light having an engaging means is provided between the substrate and the case main body in order to detachably fix the case main body and the substrate. In the receiver,
The hooking means includes a hooking member provided on the case body and a hooking member provided on the substrate.
The above-mentioned hooking member protrudes from the wall of the case body in a state where two hooking parts are arranged on both sides of the gap,
On the other hand, the engaging member is configured to have a U-shaped overall cross-sectional shape,
The base is connected to the board,
The free end is equipped with a knob for finger operation,
Furthermore, between the base part and the knob part, it is provided with a curved part for giving elasticity such that the knob part is bent toward the base part side,
Furthermore, between the knob part and the curved part, in a state where the substrate is attached to the case main body, the part located below the hooking part is formed wider than the width of the gap,
The portion that is in contact with the latching portion in the mounted state is formed with a width narrower than the width of the gap,
In the normal state, the elasticity in the curved portion is such that the dimension between the base part and the contact part is wider than the dimension between the base part and the wall in the mounted state,
In the mounting process, the wide part is pushed by the latching part and bent to the base part side,
After the wide portion has passed through the latching portion, the contact portion enters the gap so as to hit the wall, and when the latching means is engaged, the wide portion and the latching portion are latched. An optical receiver characterized by that.

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