JP2008009091A - Optical receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical cable socket excellent in workability. <P>SOLUTION: The optical cable socket is formed in an optical receiver by cutting the end of the case side to form a recessed cutout and using a bottom plate long as predetermined and extending to the outside of the side plate of the case from the bottom of the cutout and side walls projecting from both ends of the cutout with the bottom plate in between. The above supplementary member is formed almost square having an inner space open to the socket composed of the outer and inner walls formed almost parallel within the size of the bottom plate of the socket and two side walls a little smaller than the distance between the above walls and formed between them. It closes the socket when the cover is closed while leaving a first optical cable introduction path with a certain spacing between the ends of the above outer and inner walls and the bottom plate of the socket. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to an optical receiver provided with an optical fiber insertion port that can be used when an optical cable is guided from the outside of a case to an optical fiber housing portion in the optical receiver.

In the optical receiver, the extra length optical fiber is accommodated in the optical fiber accommodating portion. If an external force is applied to the optical fiber introduction portion of the optical receiver in the accommodated state, the force is applied to the optical fiber connecting portion in the optical fiber accommodating portion, and the optical fiber may be damaged or broken. Therefore, in order to prevent such an optical fiber damage accident, it is desirable to hold the optical cable located in the optical cable insertion path in the optical receiver.
Therefore, conventionally, as well shown in FIGS. 1 and 2, an optical cable insertion path 60 is positioned at the optical cable entrance / exit 6 in the optical receiver 1, and the optical cable is inserted through the optical cable entrance / exit 6. In order to elastically hold the optical cable 41 from the optical cable 41, the optical cable located in the optical cable insertion path 60 is tightened with screws 40, 40 by fastening a clamping tool 39 made of a clamping member having elastic members on the upper and lower contact surfaces. 41 is held.
(For example, Patent Document 1)

Japanese Patent Laid-Open No. 2005-24760

However, as shown in FIG. 1 and FIG. 2, in the optical fiber insertion path 60 in the conventional optical receiver, the optical cable from the optical receiver case inlet / outlet 6 to the optical fiber accommodating portion 24 with the leading optical fiber at the head. 41 is inserted. In this case, there is not only the trouble of having to pass the long optical cable 41 between the upper and lower sandwiching members 39, but if an optical connector or the like is connected in advance to the tip of the optical cable, If the machine case entrance / exit 6 is not made much larger, it cannot be inserted, and there is a problem that the case cannot be reduced in size.
Further, in order to facilitate the insertion operation, the insertion member 39 maintains an appropriate interval when the optical receiver case entrance 6 is enlarged and the screw for tightening the clamping member 39 is loosened. Therefore, it is necessary to provide a configuration that does not interfere with the insertion of the optical cable. For this purpose, it is necessary to provide an elastic member such as a spring between the clamping members 39, and the case becomes large or the configuration is complicated. There was a problem that the cost was increased.
Therefore, in this application, it was made to solve these problems.
An object of the present invention is to provide an optical receiver having an optical cable insertion opening in which an optical cable can be easily inserted from the outside toward an optical fiber housing portion in the case of the optical receiver.
Another purpose is to easily insert a thin and long optical cable from the outside toward the optical fiber housing in the case of the optical receiver. An optical receiver configured to place the required length of the optical fiber directly toward the optical fiber housing portion in the case, and then hold the intermediate portion of the optical cable in a state of being sandwiched by the insertion path in the case It is intended to provide an optical cable insertion path.
Other objects and advantages will be readily apparent from the drawings and the following description associated therewith.

In order to solve the above problems, the invention of claim 1 includes a case main body having a storage space, and an optical receiver that is stored in the storage space and converts an optical signal input from the outside into an electrical signal and outputs the electrical signal. , Through the optical fiber housing part which is housed on the front side of the housed optical receiving part and has a winding frame in which the front side is opened in order to wind the extra length optical fiber with a predetermined curvature, and the side plate of the case body In this state, the optical cable insertion port is designed so that the optical fiber can be introduced from the outside of the case body toward the optical fiber housing, and the optical cable inserted through the optical cable insertion port is fixed inside the optical cable insertion port. In an optical receiver comprising an optical cable fixing means for forming a lid and a lid pivotably attached to the case body,
The lid includes a complementary member for closing the optical cable insertion port protruding from the inner surface of the lid, and when the lid is in a closed state, the complementary member includes the complementary member and the optical cable. The optical cable insertion port is closed so as to form a first optical cable introduction path having a predetermined interval between the insertion port and the insertion port.

According to a second aspect of the present invention, in the optical receiver according to the first aspect, the optical cable insertion opening is formed by notching the side plate end portion of the case body in a concave shape to form a notch portion, and the bottom end portion of the notch portion A base plate having a predetermined length projecting outward from the side plate of the case body, and side walls projecting from both ends of the recess across the base plate, and the complementary member is inserted into the optical cable An outer wall and an inner wall arranged substantially in parallel within the range of the dimension of the bottom plate of the mouth, and a space slightly narrower than the distance between the side walls of the optical cable insertion opening are arranged between the outer wall and the inner wall. When the lid is closed, the complementary member is formed with the outer wall and the inner side wall when the lid is closed. Each tip of the above and the above optical cable Closing the optical cable insertion opening so as to form a first optical cable introduction path having a predetermined distance between the bottom plate inside surface of the through hole.

According to a third aspect of the present invention, in the optical receiver according to any one of the first and second aspects, an insertion port jump prevention means for preventing the optical cable from jumping is provided on the inner surface of the optical cable insertion port.

According to a fourth aspect of the present invention, in the optical receiver according to any one of the first to third aspects, an optical cable inserted into the optical cable insertion port is interposed between the optical cable insertion port and the optical cable fixing means. A second optical cable introduction path formed in a concave shape for guiding to the optical cable fixing means is provided, and an insertion path jump prevention means for preventing the optical cable from jumping is provided on the inner surface of the second optical cable introduction path.

As described above, the optical cable can be formed between the complementary member formed on the lid and the optical cable insertion port simply by placing the optical cable on the side of the optical cable insertion port formed on the side plate of the case body and closing the lid. There is an operational effect that allows an extra-length optical cable to be accommodated very easily from the introduction path while penetrating the side plate of the case body.

Further, according to the present invention, the optical cable insertion port is formed by notching the side plate end of the case body in a concave shape to form a notch, and projecting outward from the bottom end of the notch to the side plate of the case body. A bottom plate having a predetermined length, and side walls projecting from both ends of the recess across the bottom plate, and the complementary member is substantially within the size of the bottom plate of the optical cable insertion port. Opposing to the optical cable insertion port, which is composed of an outer wall portion and an inner wall portion arranged in parallel, and two side walls respectively disposed between the outer wall portion and the inner wall portion with a dimension slightly narrower than the interval between the side walls of the optical cable insertion port. When the lid is in a closed state, the complementary member is formed with a front end portion of each of the outer wall portion and the inner wall portion. Inside the bottom plate of the optical cable insertion port Since it is configured so as to close the cable insertion opening so as to form a first optical cable introduction path having a predetermined distance between,
Even if the introduction path has an opening through which an optical cable can be inserted, the outer wall side and the inner wall side are separated from each other by a predetermined length. By this introduction path, dust, sand, rainwater, etc. from the outside It is possible to prevent moisture from entering the inside of the optical receiver.
In addition, since the introduction path has a space formed by a complementary member (that is, an outer wall part, an inner wall part, and two side walls protruding from the lid) in the middle part thereof, Even if sand, rainwater, or the like enters from the introduction path on the outer wall side, it does not enter further through the space, and a highly reliable optical receiver can be provided even with a simple configuration.

Further, in the present application, a concave second optical cable introduction path formed in a concave shape for guiding the optical cable inserted through the optical cable insertion port to the optical cable fixing unit between the optical cable insertion port and the optical cable fixing unit. If the inner surface of the recess is provided with means for preventing the passage of the optical cable from jumping up, hold the optical cable with the fingertip until the cover is occupied after the optical cable is attached. Even if not, the optical cable does not jump up from the insertion path, so there is an operational effect. Similarly, in the present application, even if an insertion port jump-up preventing means for preventing the optical cable from jumping is provided on the inner surface of the first optical cable introduction path formed at the optical cable insertion port, the same operational effect is obtained.

Hereinafter, an example of an embodiment embodying the present invention will be described in detail with reference to the drawings. 1 and 2 show a case main body 3 in a case 7 and an electronic device (in the embodiment of the present invention, an optical receiving unit; hereinafter referred to as an optical receiving unit) 13 and an optical fiber. It is the front view which shows the positional relationship of the accommodating part 24, and the disassembled perspective view seen from the connection board 3a side. In these drawings, the configuration of the insertion path 60 displays the insertion path shown in the prior art. 3 is a schematic perspective view of the case body 3 as seen from the top plate 3c side showing the first embodiment, FIG. 4 is a schematic perspective view of the case body as seen from the top plate 3c side showing the second embodiment, and FIG. It is the schematic perspective view seen from the top plate 3c side which shows 3rd Example of the case main body 3. FIG.
6A is a front view of the holding body 93 in the case main body 3 of the third embodiment shown in FIG. 5, and FIG. 6B is a rear view. 7A is a cross-sectional view taken along the line AA shown in FIG. 6A, FIG. 7B is a cross-sectional view taken along the line BB shown in FIG. 6A, and FIG. It is CC sectional view taken on the line shown by (a). 8A is a cross-sectional view taken along line DD shown in FIG. 5 and shows a fitting state of the case body 3 and the holding body 93, and FIG. 8B is a cross-sectional view taken along line EE shown in FIG. FIG. FIG. 9 is a partial cross-sectional view of the case main body 3 shown in FIG.
FIGS. 10A and 10B are diagrams for explaining the positional relationship between the holding tool 39 and the two series of optical cables 41 and 42 in the insertion path 60. FIG. 10A shows a state in which the holding tool is opened, and FIG. 10B shows a state in which the holding tool is closed. It is the partially expanded front view which shows a state. FIG. 11 is an enlarged perspective view showing an embodiment of the holding tool. FIG. 12 is an enlarged perspective view of the main parts of the optical fiber housing part 24 and the insertion path 60 of the present application. FIG. 13 is an enlarged perspective view of the optical cable insertion port. FIG. 14 is a front view showing the positional relationship between the case body 3 according to the present invention, the light receiving unit 13 and the optical fiber housing unit 24 housed in the case body 3, and an exploded perspective view seen from the connection board 3a side. . FIGS. 15A and 15B are diagrams in which the lid body 4 is attached to the case body 3, where FIG. 15A is a front view and FIG. 15B is a front view. FIG. 16A is an enlarged view seen from the line GG in FIG. 15A, FIG. 16B is a cross-sectional view seen from the line HH in FIG. 15B, and FIG. It is sectional drawing seen from the II line | wire in FIG.15 (b). 17A is a cross-sectional view as seen from the line JJ in FIG. 15B, and FIG. 17B is a cross-sectional view as seen from the line KK in FIG. 15B.

As shown in FIGS. 1 and 2, reference numeral 3 denotes a case main body in the optical receiver 1 installed near an entrance / exit of an office building or a condominium as is well known. It can be opened and closed freely. 4a indicates a stopper of the lid.
The case body 3 has a top plate 3c, a connection board 3a arranged parallel to the top board, and two side plates 3b arranged between the top board 3c and the connection board 3a in a square shape. In addition, the top plate 3c, the connection board, and the back side plate 3d provided so as to close one surface of the square space 5 surrounded by the two side plates 3b.
The front surface of the case body 3 is provided with a relatively large opening 3e for operating the optical fiber 44 and the like in the case from the outside of the case, and the case body 3 is openable and closable with respect to the opening 3e of the case body. The case 7 is configured by covering the lid body not shown in the figure pivotally attached to the main body. Further, in the case main body 3, the optical fiber 44 in the case 5 is passed through the opening 3e on the front side surface from the outside. When the optical fiber is arranged in a state of being attached to the substrate 25 with a large curvature, the substrate 25 for receiving the optical fiber arranged in the attachment shape with a large curvature and the optical fiber arranged with the large curvature at the position where the optical fiber is arranged. In order to prevent the optical fiber from escaping toward the outside in the direction, an optical fiber housing portion 24 composed of peripheral walls 58, 27 and the like arranged in a fence shape on the substrate surface is provided.
Reference numeral 5 denotes a storage space in the case main body 3, and includes an optical receiving unit 13 including an O / E conversion unit, and a storage unit 24 for storing an extra length optical fiber 44 and the like. The connection board 3a on the lower side of the case main body 3 is formed of, for example, a main body portion including the bottom portion 3d and the side portion 3b and a plastic material integrally or by combining different materials. Reference numerals 8 and 9 provided on the connection board 3a denote output terminal protrusions for taking out known television signals. Examples of the case body 3 will be described below. Further, 10 provided on the back side plate 3d is a conventional locking claw for fixing the shield case.

(First embodiment)
In FIG. 3, the back side plate 3d is provided with a first holding body 200 according to the first embodiment. The first holding body 200 is composed of a movable locking piece 202 and a receiving step portion 203 protruding from the base body 201. The movable locking piece 202 and the receiving step portion 203 are not shown in FIG. The locking part formed in the light receiving part 13 is clamped, and the light receiving part 13 is attached in the case body. Details of this mounting method will be described later.
The first holding body 200 is detachably fixed to the back side plate 3d of the case body 3 by a fastening claw 31d and a holding claw 32d projecting from the back side plate 3d at an intermediate position between the connection board 3a and the top plate 3C. Has been. The attachment is completed by abutting the front end 204d of the base body 201 against the fastening claw 31d and then fitting the back end 205 of the base body 201 into the holding claw 32d so as to hold it. Furthermore, one set of the fastening claw 31d and the holding claw 32d is also formed on the top plate 3c side. In the first embodiment of the present application, the first holding body 200 is positioned at the intermediate position of the case body 3 or the top plate 3c. It is configured so as to be selectively detachably fixed at two positions on the side.
In the figure, reference numeral 160 denotes an optical cable insertion port.

(Second embodiment)
In this embodiment shown in FIG. 4, as shown in the first embodiment described above, the first holding body 200 is configured to be detachably fixed, but is formed on the top plate 3c side. Instead of a set of the fixing claw 31d and the holding claw 32d for attaching the holding body 200, the fixed locking portion 100 including the fixed locking piece 10 and the receiving step portion 11 formed integrally with the back side plate 3d. When the large light receiving portion 13 is attached, it is attached at the fixed locking portion 100, and when the small light receiving portion is attached, it is attached using the holding body 200, so that two different sizes are provided. The optical receiver 13 can be attached.

(Third embodiment)
As shown well in FIG. 5, this embodiment has a fixed locking portion 100 and a holding body as in the first and second embodiments, but the structure of the holding body is the second. This is different from the embodiment. A specific example of this holding body is shown in FIG. In this figure, (a) is a front view and (b) is a rear view.
The outer shape of the second holding body 93 is substantially rectangular with a width substantially equal to the dimension between the side plates 3b of the case body 3 and a height substantially equal to or slightly smaller than the height of the side plate 3b. For example, it is formed from an elastic material such as synthetic resin. The second holding body 93 has notches 95 cut out at predetermined positions from the opening side of the case body 3 toward the back side plate 3d side at predetermined positions of the holding body 93 on both sides. A movable locking piece comprising a flange portion 94b hooked to the upper end portion of the locking portion formed in the shield case of the optical receiver 13 and a base portion 94a that supports the flange portion 94b, not shown in the figure formed in FIG. 94 is formed. The movable locking piece 94 is arranged in parallel so that its planar position protrudes from the plane formed by the holding body 93 toward the optical receiving section 13 by a predetermined dimension at the connection portion between the base portion 94a and the holding body 93 main body. ing. A back side fastening piece projecting from the holding body 93 in the direction of the connection board is provided in the vicinity of both sides of the movable locking piece 94 between the base portion 94a and the holding body 93 with the notch 95 interposed therebetween. Each of the locking pieces 94 is provided with a pair of receiving step portions 96 comprising 96a and an upper fastening piece 96b protruding from the holding body 93 in a direction perpendicular to the back-side fastening piece 96b.

Further, the case body 3 is connected between the receiving step portion 96 of the holding body 93 and the lower end portion 97 of the holding body 93 so as to have a substantially cross-sectional shape in the longitudinal direction of the holding body 93. A reinforcing plate 98 that is integrally formed toward the direction of the board 3a is integrally formed so that it is difficult to bend against a force applied in a direction perpendicular to the longitudinal direction of the holding body 93. These are well shown in FIG. 7, in which (a) is a cross-sectional view taken along line AA in FIG. 6 (a), and is a cross-sectional view at the approximate center of the movable locking piece 94. FIG. 6B is a cross-sectional view taken along line B-B in FIG. 6A, and is a cross-sectional view at a position where a central portion of the movable locking piece 94 is removed. FIG. 6C is a cross-sectional view taken along the line CC in FIG. 6A, and is a cross-sectional view of the holding body 93 including the receptacle receiving step portion 96.
Further, an abutting surface 93a is formed at the upper end of the holding body 93 so as to be inclined toward the connection board 3a. Moreover, the protrusion part 93b protruded toward the side is formed in the both ends of a holding body. Reference numeral 94c denotes a reinforcing rib formed on the back of the movable locking claw 94.

Next, a method of attaching the holding body 93 to the case body 3 will be described with reference to FIGS. As well shown in FIG. 5, the side plates 3b of the case body 3 are formed with side plate fitting portions 33 formed from the back side plate 3d to the opening direction and having a plurality of groove portions 33a. A back side plate fitting portion 63 having a plurality of groove portions 63a is formed at a predetermined position on a line connecting the groove portions 33a of the side plate fitting portion 33, and the side plate fitting portion 33, the back side plate fitting portion 63, and The fitting part of Claim is comprised. The holding body 93 is fitted to both ends of the holding body 93 in a predetermined groove portion of the plurality of groove portions 33a of the side plate fitting portion 33 with respect to the fitting portion, and further, the fitting end portion 97 of the holding body 93 is fitted. Is completed by pressing until is fitted in the fitting groove 63a of the back side plate fitting portion 63 formed in the back side plate 3d. FIG. 8A shows a cross-sectional view taken along the line DD in a state where the holding body 93 is attached to the case body 3 as shown in FIG. 5, and the holding body 93 is 3 from the direction of the connection board 3a of the fitting portion. A state of being fitted into the fitting groove of the pawl is shown. FIG. 8B shows a cross-sectional view taken along line EE in FIG. According to this figure, on the inner side of the side plate 3b where the side plate fitting portion 33 is formed, the case main body 3 extends from the stepped portion 33b formed at a predetermined position from the opening end side of the case main body 3 to the back side plate 3d. A recess 33c is formed so as to be slightly larger outward than the opening.

The locking method of the holding plate 93 will be described. First, when the fitting end portion 97 of the holding plate 93 is fitted into the groove portion at a predetermined position of the fitting portion, the protruding portion 93b comes into contact with the upper end of the side plate 3b. The protrusion 93b is formed to have a slope so as to open outward from the lower direction to the upper side. Since the case body 3 is formed of an elastic material such as a synthetic resin material, when the holding body 93 is further pressed downward, the holding body 93 advances while the side plate 3b is expanded outward. When the holding body 93 is further pressed, the tip of the projection 93 passes through the step 33b, whereby the side plate 3b is restored to its original state by the elastic force, and the step 33b is engaged with the projection 93b. The holding body 93 is detachably fixed to the case body 3. Further, since the side plate 3b has elasticity as described above, the holding body 93 is removed by spreading the side plate 3b outward to release the locking between the stepped portion 33b and the protruding portion 93b. Can be easily removed.

Next, a method of attaching the optical receiver 13 to the case body 3 will be described with reference to FIG. In order to simplify the description, the case where the optical receiver 13 is attached to the case body 3 shown in the third embodiment will be described. FIG. 9 is a partial cross-sectional view in which a part of the FF line in a state where the optical receiver 13 is attached to the perspective view of the case main body 3 shown in FIG.
As is generally known, the optical receiver 13 shown in FIG. 9 includes a metal case (chassis) 14 (14b shown in the figure is a lid) that has a shielding effect on the outside. Inside, an electronic circuit known as O / E conversion means, usually means for converting an optical signal into an input signal for a television receiver is housed. If necessary, an amplifier circuit is accommodated as is well known. An optical adapter 20 is detachably fixed to a predetermined position on the surface of the case (chassis) 14. An optical connector 21 a 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. A coaxial cable plug 16 indicates the presence of a known television signal output terminal, for example.

One or a plurality of locking portions 15 formed by squeezing the case 14 so as to project outward are formed on the side surface of the case 14 of the optical receiver 13 opposite to the side surface on which the coaxial cable plug 16 is formed. In the figure, only one place is shown.) The locking portion 15 is formed on the holding body 93 provided in the case body 3 and the movable locking piece 94 (or the fixed locking portion 100) is formed. And is detachably held by a fixed locking piece 10).

Furthermore, the mounting structure and mounting procedure will be described. First, the case 14 is attached to the storage space 5 so that the coaxial cable plug 16 of the optical receiver 13 is positioned from the output terminal protrusion 9 formed in the binding board 3 a of the case body 3. Then, while pressing the case 14 in the direction of the wiring board 3a, the side of the case 14 where the locking portion 15 is formed is pressed against the locking piece 94. At this time, by forming a part or the entire circumference of the base portion 16a of the coaxial cable connector 16 in a tapered shape, the central axis of the coaxial cable connector 16 and the central axis of the output terminal protruding port are substantially on the same axis. Can be attached.
Since the locking piece 94 is made of an elastic member, when the locking portion 15 of the case 14 is pressed, the movable locking piece 94 is expanded in the direction of the holding body, and the case 14 is fitted. And the collar part 94b of the movable locking piece 94 fits into the locking part 15 of the case 14, and the case 14 is locked. Since the movable locking piece 94 is arranged in parallel so as to protrude from the holding body 93 to the front surface on the case 14 side, the upper surface 93 a of the holding body 93 does not interfere with the mounting of the case 14.

Since the receiving step portion 96 is formed below the movable locking piece 94 formed on the holding body 93, the case 14 is connected to the coaxial cable with the shield case 14 attached to the case body 3. (Specifically, the base of the coaxial cable plug) and the output terminal protrusion, and the locking portion 15 side is sandwiched between the flange portion 94b and the back side fastening piece 96a, so that the back side Movement in the direction perpendicular to the plate is restricted. Further, the holding body 93 or the connection board 3a of the shield case 14 is formed by fitting the coaxial cable plug (specifically, the base portion of the coaxial cable plug) and the output terminal protrusion and the upper fastening piece 96b. The movement in the direction is restricted, and the case 14 is securely fixed inside the case body 3.

Next, the insertion path 60 will be described with reference to FIG. The insertion path 60 has a shape in which a part of the substrate 25 is recessed, and the lower surface 62c along the optical cables 41 and 42 (the optical cable toward the upper surface of the substrate 25 at the back as viewed from the optical cable insertion port 6). 41) and a groove portion 260 having both side surfaces facing each other.

The optical cable intake in the groove 260 is provided with a clamping tool 39 composed of a clamping member having elastic members on the upper and lower contact surfaces in order to sandwich the optical cables 41 and 42 from above and below. Optical cables 41 and 42 are detachably held.
As is well shown in the perspective view of FIG. 11, 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 a longitudinal direction from the pressing piece 39a. A pivot piece 139 projecting in the direction is formed. A pivot shaft 139a (one is not shown) is formed on the pivot piece 139 outward. The pivot shafts 139a and 139a are pivotally attached to a pivot portion having a pivot hole which is not shown in the figure formed on the substrate 25, and the clamping tool 39 can be freely opened and closed at the pivot portion. It is attached to become. Further, 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.

Next, as well shown in FIG. 10 (a), when the holding tool 39 is closed on the lower surface 62c facing the elastic members 71a, 72a provided in the pressing piece 39a of the holding tool 39, , Receiving a part of the holding member side elastic members 71a and 72a and forming a concave portion 70 provided with the elastic members 71b and 72b at the bottom, in the left and right direction of the optical cables 41 and 42 (insertion of the optical cable) Positioning is performed with respect to the direction), and holding pressure is held at this position. In the embodiment of the present application, the elastic members 71b and 72b and the recesses 70 and 70 constitute the contact portions 162 and 162.
Moreover, although the example which fastens using the fixing screw 40 as an adhering means of the said lower surface 62c and the clamping tool 39 was shown, 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, but spaced apart from each other. It is not particularly limited to the embodiment, such as good.

A more detailed view of the insertion path 60 is shown in FIG. FIG. 12A is a partial perspective view in which a part of the insertion path 60 of the optical fiber housing portion 24 is broken, and FIG. 12B is a perspective view of a main part of a different embodiment.
As well shown in FIG. 12A, a guide recess 70a extending toward the front side (in the direction of the connection board) is formed in the recess 70 having the elastic members 71b and 72b on the bottom surface. The guide recess 70a facilitates guiding the introduced optical cables 41 and 42 to the contact portion 162, and before the clamp 39 is tightened after the optical cable is mounted above the opening of the guide recess 70a. A protrusion 29 for preventing the optical cable from jumping out of the insertion path is formed to facilitate the wiring of the optical cable. In addition, the said guide recessed part 70a is the 2nd optical cable introduction path | route as described in a claim, and the said protrusion 29 is an insertion path splash prevention means as described in a claim.
As described above, this embodiment is configured such that the optical cable can be easily inserted from above the case main body 3. Even if the optical cable is easily mounted, the protruding piece 29 formed in the guide recess 70a. By having the optical cable, the optical cable will not jump out.

The projecting piece 29 shown in the embodiment of FIG. 12 (a) is one in which projecting pieces 29a and 29b having different projecting dimensions are arranged facing each other from the opening end side of the guiding recess 70a toward the center of the guiding recess 70a. As a set, in the embodiment of the present application, two sets are provided on the front side and the rear side of the guide recess 70a, and the front-side protruding piece 29a and the rear-side protruding piece 29a are alternately arranged so that the protruding directions face each other. As a result, the spaces formed by the tips of the projecting pieces 29a and 29b are displaced from the axis of the guide recess 70a, thereby preventing the optical cable from jumping up after installation.
In the embodiment of FIG. 12B, a projecting piece 30 different from the above embodiment is shown. The projecting piece 30 of this embodiment includes an inclined portion that is inclined downward in the center direction from the opening end portion of the guide recess 70a and a tongue-like portion that extends downward from the tip of the inclined portion. Are arranged so as to face each other from above both sides of the guide recess 70a. According to this, the projecting piece 30 is provided with an inclined portion that facilitates the introduction of the optical cable, so that it does not interfere with the mounting. Then, after the optical cable is mounted, the optical cable can be prevented from jumping up by being disposed so as to be positioned inside the protruding piece 30.

FIG. 13 shows an enlarged perspective view of the optical cable insertion port 160 corresponding to the insertion path 60. The optical cable insertion port 160 in this embodiment is formed in a substantially square shape having an upper end opened in the connection board 3a of the case body 3, and includes a bottom plate 160c projecting from the bottom end portion to form a bottom surface, and the bottom plate 160c. It is comprised so that it may be enclosed by the side walls 160b and 160b which protruded from the both sides of the opening edge part on both sides.
And the bottom part 160c of the insertion port 160 is formed in the position which guide | induces the optical cables 41 and 42 reliably with respect to the insertion path 60, respectively. Further, by providing the bottom portion 160c with a partition wall 160a formed integrally with the case body 3, guide paths 170, 170 are formed on the left and right sides, and the optical cable can be reliably guided to a predetermined position of the insertion path 60. It is configured as follows. The protruding dimension of the bottom plate 160c of the insertion port 160 is configured to obtain a predetermined length of an optical cable introduction path that connects the outside of the case body 3 and the inside of the case body 3. The guide path 170 is the first optical cable introduction path described in the claims.
Moreover, although the example which formed the insertion port 160 integrally with the connection board 3a of the case main body 3 was shown in the present Example, it may be formed integrally with the board | substrate 25 and is not specifically limited to an Example.

Next, in the embodiment of the present invention, as shown in FIG. 14, after the optical receiver 13 is stored in the case body 3, the optical fiber storage section 24 is stored on the opening 3 e side of the case body 3. Thereafter, as shown in the front view of FIG. 15 (a), the assembly of the optical receiver 1 is completed by assembling the lid 4 to the opening 3e. FIG. 15B is a plan view of the direction of the connection board 3a. As shown in this figure, the lid 4 is formed with a folded portion 4b so as to cover a part of the case body on the side of the connection board 3a. A complementary member 140 for covering the opening of the optical cable insertion port 160 is formed at a position facing the optical cable insertion port 160 of the folded portion 4b.

Here, the fitting state between the complementary member 140 and the optical cable insertion port 160 will be described with reference to FIGS. 16 and 17. FIG. 16A is an enlarged view of the complementary member 140 and the cable insertion port 160 as seen from line GG in FIG. FIG. 16B is a cross-sectional view taken along line HH in FIG. 15A, and is a cross-sectional view in which the fitting state between the complementary member 140 and the optical cable insertion port 160 is cut along a plane parallel to the connection board 3 a. FIG. 16C is a cross-sectional view taken along the line I-I in FIG. 15B, and is a cross-sectional view in which the fitting state of the complementary member 140 and the optical cable insertion port 160 is cut by a plane formed by the longitudinal direction of the connection board 3a. is there. 17A is a cross-sectional view taken along the line JJ in FIG. 15B, and FIG. 17B is a cross-sectional view taken along the line KK in FIG. 15B. It is sectional drawing which cut | disconnected the fitting state with 160 by the surface orthogonal to the longitudinal direction of the connection board 3a.

As shown well in these drawings, the complementary member 140 includes an outer wall 141 formed integrally with the folded portion 4 b formed on the lid 4, and a predetermined distance from the outer wall 141 from the inner surface of the lid 4. The inner wall part 143 projecting so as to be arranged substantially in parallel and the two side plates 142 arranged between the outer wall part 141 and the inner wall part 143 are arranged in a substantially square shape, one of which is closed by the lid 4 and the other. Is formed in a substantially rectangular shape having an opening and a space 140a therein. Cutout portions 141a and 143a corresponding to the shape of the upper end portion of the partition wall 160a are formed at the substantially central portion of the opening end 141b of the outer wall portion 141 and the substantially central portion of the opening end 143b of the inner wall portion 143.

When the lid 4 is closed to the case body 3, the complementary member 140 is introduced with a dimension that allows the optical cable to be inserted between the distal end portion of the complementary member 140 and the bottom surface 160 c of the optical cable insertion port 160. It will be in the state inserted in the optical cable insertion port 160 so that it may have the path | route 170. FIG. That is, the outer wall portion 141 and the inner wall portion 143 of the complementary member 140 are arranged such that the distance between them is the same as or slightly smaller than the protruding dimension of the bottom plate 160c of the optical cable insertion port 160. 142 is arranged so that the interval is slightly smaller than the interval between the side wall 160b and the side wall 160b of the optical cable insertion port 160, and the projecting dimension of the complementary member 140 from the lid body 4 is at the tip of the complementary member 140. The complementary member 140 is inserted into the insertion port 160 so that the formed notches 141a and 143a are arranged so as to be fitted to the distal end portion of the partition wall 160a formed in the optical cable insertion port 160.

Next, the extra length optical fiber accommodating portion 24 will be described. In this optical fiber housing portion 24, reference numeral 25 denotes a substrate, which is formed of a hard flat plate material such as plastic. The substrate 25 is mounted by any means, for example, directly on the case body 3 or detachably attached to the case 14 mounted on the case body 3 using a screw member or the like. 1 and 2, reference numeral 25a 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.
As shown in the figure, the upper surface of the substrate 25 has first 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 winding 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 molded into the base body 25 as an integral material by molding the substrate 25 with a 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, a plurality of arbitrary joining means, for example, a plurality of holes are formed in the substrate 25 at a predetermined position of the substrate 25, and a large number of extending from the winding frame side are formed. You may mount | wear with a close_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 jump pawl 28 is provided in an overhanging shape with an integral material from the upper position of the peripheral walls 26a, 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.

On the upper surface of the substrate 25, 34 and 35 indicate the presence of known first and second splice holders, and known first and second mechanical members for connecting the optical fibers 44 and 47, 45 and 46, respectively. This is for holding the splices 36 and 37 detachably.
The arrangement position is selected above an intermediate position between the first winding frame 26 and the second winding frame 27 in FIG.
In the substrate 25, the corner where the optical adapter 20 disposed at substantially the same height as the upper 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.

Next, on the upper surface of the substrate 25 near the optical cable entrance / exit 160, the entrance / exit of the 2-core optical cable 41 and the 2-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.
In the vicinity of the entrance / exit 160, the above-described sandwiching tool 39 is provided to elastically sandwich the optical cables 41, 42 from above and below, and the inserted optical cables 41, 42 are detachably held. .

In the operation of laying the optical cable in the configuration described above, the two-core optical cable 41 is inserted into the optical fiber housing portion 24 from the opening end of the optical cable entrance / exit 160. If necessary, a two-core (or single-core) optical cable 42 is also inserted and fixed. In this state, the optical fibers are connected to each other using connection means (or any other known connection means) using the first and second mechanical splices 36 and 37 that are generally known in this state. Since a commonly known tool is used in this connection operation, the optical fibers 44, 45, 46 and 47 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.

After the optical fibers are connected as described above, as shown in FIG. 13, the extra length optical fibers (excessive long optical fibers) in the form of loops are connected to the optical fiber accommodating portion 24. Must be paid cleanly. When storing the extra length after connecting the optical fiber, the optical fiber housing part in the present application should be wound in a right-handed or left-handed manner, stored in a small volume, or appropriately selected from a number of ways of winding. Therefore, even if the excess length of the optical fiber is large and it is in the form of a loop, and the length of the loop is appropriate and uncertain, it is possible to wrap the optical fiber well and make it look good become.
Moreover, even if the winding method of the above aspect is loosely wound or tightly wound around the reels 26 and 27, respectively, 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 greater than the safe curvature.

As described above, after the optical receiver 13 and the extra length optical fiber accommodating portion 24 are mounted in the case body 3 and the optical fiber is accommodated in the optical fiber accommodating portion 24, a normal usage method is used. Used by. For example, the case main body 3 is covered with a lid 4 (not shown), and is attached to a house as usual.
Thereafter, 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 / exit 160 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, for an example of the work of fixing the optical cable in the insertion path 60, for example, the work of placing the optical fiber in the optical fiber housing portion 24 shown in FIG. 14 is completed, and the work of fixing the optical cable 41 connected to the optical fiber 44 is performed. explain.
As shown in FIG. 10A, the middle of the optical cable 41 that continues to the outside for a long time is pinched, and the contact portion 162 formed on the lower surface 62 c from above the insertion port 160 provided in the case body 3. , 162 and the pinching tool 39.
Next, as shown in FIG. 10B, the optical cable 41 is clamped by the clamping tool 39 via the elastic members 71 and 72 by screwing the fixing means including the fixing screw 40. It will hold exactly.

As described above, according to the present invention, the supplementary member formed on the lid body 4 can be obtained simply by placing the optical cable in a lying state on the optical cable insertion port 160 formed on the side plate 3a of the case body and closing the lid body 4. Work that can accommodate an extra length of optical cable from the introduction path 170 (first optical cable introduction path) formed between the optical cable insertion port 160 and the optical cable insertion port 160 in a state of penetrating the side plate 3a of the case body 3 very easily. It has the above effect.

Further, according to the present invention, the optical cable insertion port 160 is formed by notching the end of the side plate 3a of the case body 3 in a concave shape to form a notch, and from the bottom end of the notch to the outside of the side plate of the case body. A base plate 160c having a predetermined length projecting in the direction, and side walls 160b and 160b projecting from both ends of the recess with the bottom plate 160c interposed therebetween, and the complementary member 140 includes the optical cable insertion port. The outer wall 141 and the inner wall 143 arranged substantially in parallel within the range of the size of the bottom plate 160c of 160, and the outer wall 141 and the inner wall 143 are slightly narrower than the distance between the side walls 160b of the optical cable insertion port 160. It is composed of two side walls 142 respectively disposed between them, and is formed into a substantially rectangular system having a space inside by opening a surface facing the optical cable insertion port 160. When the body 4 is in a closed state, the complementary member 140 has a predetermined gap between the respective distal end portions 141b and 143b of the outer wall portion 141 and the inner wall portion 143 and the inner surface of the bottom plate 160c of the optical cable insertion port 160. Since the first optical cable introduction path 170 having an interval is formed, even if the introduction path 170 has an opening through which the optical cable can be inserted, the outer wall side 141 and the inner wall side 143 have a predetermined length. This introduction path 170 can prevent moisture such as dust, sand, rainwater, and the like from entering the optical receiver 1 from the outside.
In addition, the introduction path 170 includes a space 140a formed by a complementary member (that is, an outer wall portion, an inner wall portion, and two side walls projecting from the lid) 140 in the middle portion thereof, so that it rises by a strong wind or the like. Even if dust, sand, rainwater or the like enters from the introduction path on the outer wall 141 side, the space 140a does not enter the interior any more, and a highly reliable optical receiver is provided even with a simple configuration it can.

Further, in the present application, a guide recess (second recess) is formed between the optical cable insertion port 160 and the optical cable fixing means for guiding the optical cable inserted into the optical cable insertion port 160 to the optical cable fixing means. In the case where the optical cable introduction path) 70a is formed and the inner surface of the guide recess 70a is provided with the insertion path jump prevention means 29 (or 30) for preventing the optical cable from jumping up, the lid body is mounted after the optical cable is mounted. Even if the optical cable is not held down with a fingertip or the like until it occupies 4, the optical cable does not jump up from the insertion path 60, so that there is an operational effect. Similarly, in the present application, even if the inner surface of the optical cable insertion port 160 is provided with an insertion port jump-up preventing means for preventing the optical cable from jumping up, the working effect is similarly obtained. In this case, the insertion passage 60 may or may not have a jumping prevention means.

, It is the front view and exploded perspective view which show the positional relationship of the case main body in a case, the electronic device accommodated in a case main body, and an optical fiber accommodating part. The schematic perspective view seen from the top plate side which shows 1st Example of a case main body. The schematic perspective view seen from the top plate side which shows 2nd Example of a case main body. The schematic perspective view seen from the top plate side which shows 3rd Example of a case main body. (A) is a front view of the holding body in the case main body of 3rd Example shown by FIG. 5, (b) is a rear view. 6A is a sectional view taken along line AA shown in FIG. 6A, FIG. 6B is a sectional view taken along line BB shown in FIG. 6A, and FIG. 6C is shown in FIG. It is CC sectional view taken on the line. (A) is the DD sectional view taken on the line shown by FIG. 5, and the fitting state of a case main body and a holding body is shown, (b) is the EE sectional view taken on the line by FIG. 8 (a). FIG. 6 is a partial cross-sectional view in which a part of the FF line is broken when the optical receiver is attached to the case main body shown in FIG. 5. It is a figure for demonstrating the positional relationship of the clamping tool in an insertion path, and two series of optical cables, (a) is the state which opened the clamping tool, (b) is the partially expanded front view which shows the state which closed the clamping tool FIG. It is an expansion perspective view which shows the Example of a clamping tool. It is the perspective view which expanded the principal part of the insertion path 60 formed in the optical fiber accommodating part 24 of this application. It is an expansion perspective view of an optical cable insertion port. It is the front view and exploded perspective view which show the positional relationship of the case main body which concerns on this invention, the optical receiving part accommodated in a case main body, and an optical fiber accommodating part. It is the figure which attached the cover body to the case main body, (a) is a front view, (b) is a bottom view. (A) is the enlarged view seen from the GG line in Fig.15 (a), (b) is sectional drawing seen from the HH line in Fig.15 (a), (c) is FIG.15. It is sectional drawing seen from the II line | wire in (b). (A) is sectional drawing seen from the JJ line | wire in FIG.15 (b), (b) is sectional drawing seen from the KK line | wire in FIG.15 (b).

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, 4 ... Cover, 4a ... Stopper, 4b ... Folding part, 5 ... Storage space, 6 ... Optical cable insertion port, 7 ... Case, 8 · 9 ... Output terminal protrusion, 10 ... Fixed locking part, 11 ... Receiving piece, 13 ... Light receiving part, 14 ... Case (chassis), DESCRIPTION OF SYMBOLS 15 ... Locking part, 16 ... Coaxial cable plug, 17 ... Optical fiber, 20 ... Optical adapter, 21 ... Connector, 24 ... Optical fiber accommodating part, 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, 29 ... projection piece, 30 ... projection piece 31d ... fastening claw, 32d ... holding claw, 33 ... Side plate fitting part, 33a ... groove part, 33b ... step part, 33c ... concave part, 34 ... first splice holder, 35 ... 2 splice holders 36 ... first mechanical splice 37 ... second mechanical splice 38 ... WDM filter holder 39 ... clamping tool 39a ... pressing piece 39b ... operating piece 39c ... side wall 41 ... optical cable 42 ... optical cable , 44 to 47 ... optical fiber, 50 ... media converter, 51 ... personal computer, 52 ... set top box, 53 ... television receiver, 54 ... house, 58 ... peripheral wall, 60 ... insertion path, 62c ... lower surface, 62f ... partition wall, 63 ... Back side plate fitting part, 63a ... Groove part, 70 ... Recessed part, 70a ... Guide recessed part (second optical cable introduction path), 71, 72 ... Elastic member, 73 ... Connecting member, 93 ... Second holding body, 93a ... Abutting surface, 93b ... Protruding part, 94 ... Moveable locking piece, 94a ... Base part, 94b ... Bridge part, 95 ... Notch part, 96 ... Reception step part, 96a ... Back side fastening 96b ... upper fastening piece, 97 ... fitting end, 98 ... reinforcing plate, 100 ... fixed locking part, 106 ... projecting cylinder, 106a ... partition wall, 103 ... notch part, 107 ... locking part, 110 ... slit , 125 ... pivot attachment hole, 139 ... pivot attachment piece, 139a ... pivot attachment shaft, 140 ... complementary member, 140a ... space, 141 ... outer wall part, 142 ... side wall, 143 ... inner wall part, 141a / 143a ... notch part, 141b 143b: tip portion, 160: optical cable insertion port, 160a ... partition wall, 160b ... side wall, 160c ... bottom plate, 162 ... contact portion, 170 ... introduction path (first optical cable introduction path), 200 ... first holding body , 201 ... base, 202 ... movable locking piece, 203 ... receiving piece, 204d ... front end, 260 ... groove, R1 ... optical fiber path.

Claims (4)

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;
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 in order to wind the extra length optical fiber with a predetermined curvature;
An optical cable insertion port configured to allow an optical fiber to be introduced from the outside of the case body toward the optical fiber housing portion while penetrating the side plate of the case body;
Furthermore, an optical cable fixing means for making the optical cable inserted into the optical cable insertion port immovable inside the optical cable insertion port,
In an optical receiver comprising a lid body pivotably attached to the case body,
The lid includes a complementary member for closing the optical cable insertion port protruding from the inner surface of the lid, and when the lid is in a closed state, the complementary member includes the complementary member and the optical cable. An optical receiver characterized in that an optical cable insertion port is closed so as to form a first optical cable introduction path having a predetermined interval between the insertion port and the insertion port.
The optical cable insertion opening has a predetermined length which is formed by notching the side plate end of the case body in a concave shape to form a notch, and projecting outward from the bottom end of the notch to the side plate of the case body. A bottom plate and a side wall projecting from both ends of the recess across the bottom plate;
The complementary member includes an outer wall portion and an inner wall portion arranged substantially in parallel within a range of a dimension of the bottom plate of the optical cable insertion opening, and an outer wall portion and an inner wall portion having a dimension slightly narrower than a distance between the side walls of the optical cable insertion opening. Are formed in a substantially quadrangular shape having a space inside the opening facing the optical cable insertion port composed of two side walls respectively disposed between
When the lid is in a closed state, the complementary member is a first optical cable introduction path having a predetermined interval between the respective distal end portions of the outer wall portion and the inner wall portion and the inner surface of the bottom plate of the optical cable insertion port. The optical receiver according to claim 1, wherein the optical cable insertion port is closed so as to form a line.
3. The optical receiver according to claim 1, further comprising an insertion port jump prevention unit that prevents the optical cable from jumping on an inner surface of the optical cable insertion port. 4.
A second optical cable introduction path formed in a concave shape for guiding the optical cable inserted through the optical cable insertion port to the optical cable fixing unit between the optical cable insertion port and the optical cable fixing unit; The optical receiver according to any one of claims 1 to 3, further comprising an insertion path jump preventing means for preventing the optical cable from jumping on an inner surface of the introduction path.

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