JP4962954B2 - Optical receiver - Google Patents

Description

The present invention relates to an optical receiver including a communication cable holder used to efficiently store an extra length of a communication cable drawn into a housing of a communication device in the housing.

  Currently, FTTH (Fiber To The Home), which is a data communication service for homes using optical fibers as communication cables, is spreading to ordinary homes. In this FTTH, an optical fiber laid outdoors is connected to a communication device called an optical receiver installed on an indoor or outdoor wall surface of a general house or the like. Communication data transmitted from the optical fiber via the optical receiver is transmitted to each device such as a personal computer or a TV in the home.

  FIG. 15 is a perspective view of a conventional optical receiver in a state where a cover portion is opened. The optical receiver 100 is configured such that a photoelectric conversion unit 102 and an optical fiber tray 103 for organizing and storing optical fibers (not shown) are accommodated in a laminated form in the casing 101. Among these, the photoelectric conversion unit 102 is a conversion unit that converts an optical signal from an optical fiber into an electric signal, and is connected to the optical fiber via a connector (not shown). Further, the photoelectric conversion unit 102 is provided with a connection terminal (not shown) that outputs the converted electric signal, and the electric signal is transmitted to each device such as a TV through the connection terminal.

  Further, the optical fiber tray 103 is formed with a receiving path 104 for taking up the optical fiber while ensuring the minimum bending radius and for accommodating the extra length portion with a planar spread on the upper part. Yes. The accommodating path 104 is partitioned by an outer wall 105 and an inner wall 106, and an extra-length optical fiber can be wound around the inside of the housing path 104 to hold it. The inner wall 106 of the accommodation path 104 is provided with a fiber presser 107 protruding toward the outer wall 105, and the optical fiber wound in the accommodation path 104 can jump out of the accommodation path 104 by the fiber presser 107. (For example, patent document 1 and patent document 2).

Japanese Patent Application Laid-Open No. 2004-354884 Japanese Patent Application Laid-Open No. 2004-354885

  However, the optical fiber housing structure in such a conventional optical receiver housing has the following problems. That is, in accommodating optical fibers in this type of communication equipment, cable extra length portions of various lengths are accommodated in the accommodating path 104 having a planar configuration as described above while ensuring the minimum bending radius. Therefore, the operator is required to have a complicated winding method, and as a result, the workability is poor. Further, since the receiving path 104 needs to ensure the minimum bending radius of the optical fiber, the optical fiber tray 103 cannot be reduced in planar size more than necessary. Therefore, in order to reduce the size of the device housing, it is necessary to arrange communication devices such as the photoelectric conversion unit 102 and the optical fiber tray 103 in a stacked manner in the vertical direction as in the example of FIG. As the number of communication devices accommodated in the device increases, the thickness of the device casing increases. This deprives the freedom in the housing design and installation of the optical receiver.

  On the other hand, in recent years, the optical fiber (minimum bend radius) that can reduce the minimum bend radius with little increase in transmission loss and reduced reliability as the core diameter of the optical fiber and the outer diameter of the cord are reduced. 15 mm) has been developed.

The present invention has been made in view of the above, and is capable of efficiently winding up the extra length portion of the latest optical fiber having a smaller bending radius within the housing of a communication device such as an optical receiver. It aims at providing the optical receiver provided with the cable holder.

In order to solve the above-described problems and achieve the object, the optical receiver according to claim 1 is configured as a hollow or solid rod-shaped body, and an extra length portion of the optical fiber is provided on an outer peripheral portion of the rod-shaped body. An optical fiber holding body capable of being wound and held , wherein the internal space into which the optical fiber can be introduced, a communication portion capable of leading the optical fiber introduced into the internal space to the outer peripheral portion, and one of the rod-shaped bodies And an optical fiber holder having a second communicating part that can sandwich and hold the optical fiber and converts the optical signal into an electrical signal. A first connecting terminal that is formed in a substantially rectangular parallelepiped shape and that outputs an electrical signal to a coaxial cable is disposed on one surface, and the optical fiber extending from the other end of the rod-shaped body is connected to an optical connector. Contact And a second connecting terminal for detachably accommodating the photoelectric conversion means, the optical fiber holder and the photoelectric conversion means arranged on the surface opposite to the arrangement surface of the first connection terminal. A first box for fitting one end of the rod-like body provided with the second communication portion, and for pulling out the first connection terminal. The second opening includes a housing provided on the same side surface.

The optical receiver according to claim 2, in the optical receiver according to claim 1, one end of the rod-shaped body in which the second communicating portion is provided through the first opening The first connection terminal is exposed to the outside of the casing through the second opening.

Further, the optical receiver according to claim 3, in the optical receiver according to claim 1 or 2, wherein the optical fiber holding member secures the connector for connecting a pair of optical fibers interconnected It is characterized by having a fixture fixing means.

Further, the optical receiver according to claim 4, in the optical receiver according to claim 3, wherein the outer peripheral portion, a pair of optical fibers connected to said connecting device fixed to said connecting device securing means of, characterized by comprising a first winding holding portion capable of holding wrapped one optical fiber, and a second winding holding portion capable of holding wound the other optical fiber, the.

Further, the optical receiver according to claim 5, in the optical receiver according to claim 4, wherein the optical fiber holding member is a cylindrical shape, along the longitudinal direction of the cylindrical, winding of the first The holding portion, the connection fixture fixing means, and the second winding holding portion are sequentially arranged .

Further, the optical receiver according to claim 6, in the optical receiver according to any one of claims 1 to 5, wherein the peripheral portion, the cable holding means extending along the winding axis direction of the optical fiber And an extra length portion of the optical fiber is held between the cable pressing means and the outer peripheral portion .

Further, the optical receiver according to claim 7, in the optical receiver according to any one of claims 1 to 6, wherein the optical fiber holding member, said internal space at one end of the rod-shaped body On the other hand, a power cable for a predetermined communication device can be introduced or led out, and a third communication portion for holding and holding the power cable is provided .

Further, the optical receiver of claim 8, in the optical receiver according to any one of claims 1 to 7, wherein the optical fiber holding member, the second does not hold wound surplus length portion of the optical fiber It includes an outer peripheral portion of, by freely opening and closing part of the second outer circumferential portion is separated from the outer peripheral portion, and freely opened a portion of the internal space, characterized in that.

According to the first aspect of the present invention, by using this communication cable holder, an extra length portion of a communication cable such as the latest optical fiber having a smaller bending radius can be efficiently used in the housing of the optical receiver. You will be able to wind up. In this case, the work of winding the communication cable around the communication cable holding body by the operator can be performed in the same manner regardless of the length of the extra length portion, so that the workability is extremely good. Further, by using this communication cable holder in the optical receiver housing, the area occupied by the excess portion of the communication cable can be reduced, and the degree of freedom in the arrangement and design of the optical receiver can be greatly increased. be able to.
In addition, since the communication cable can be introduced into the internal space, the wiring route of the communication cable can be diversified. It can be pulled out.
In addition, since the communication cable passed therethrough can be sandwiched and held by the second communication portion, workability at the time of winding the extra length of the communication cable or routing the communication cable is facilitated.
In addition, the extra length of the communication cable can be efficiently accommodated inside the housing of the optical receiver, and the workability for the accommodation becomes extremely good.

According to the second aspect of the present invention, the opening allows the one end of the communication cable held by the communication cable holding body to be directly drawn out of the housing from here, and the cable can be easily routed in this portion. become.

  In addition, according to the third aspect of the present invention, each of the pair of communication cables connected to the connector can be efficiently wrapped and held around the communication cable holding body. The extra length can be stored compactly.

  In addition, according to the present invention described in claim 4, since the respective winding holding portions of the pair of communication cables connected to the connection tool are provided, their maintainability is further enhanced.

Further, according to the present invention described in claim 5, the extra length portions of the pair of communication cables can be efficiently wound and held at the connection portion, and workability and accommodation in the apparatus are improved. It will greatly improve.

According to the present invention as set forth in claim 6, the communication cable wound around the outer periphery is stably held here by the cable pressing means, and accordingly, the housing of the optical receiver provided with the communication cable holder is installed. Body maintainability is improved.

According to the seventh aspect of the present invention, when a predetermined communication device is installed in the housing of the optical receiver in which the communication cable holding body is installed by the third communication portion, the power cable is connected here. Therefore, it is not necessary to secure a separate cable path on the housing side of the optical receiver , and the degree of freedom in housing design and device arrangement is increased.

  Further, according to the present invention of claim 8, by providing the second outer peripheral portion that allows a part of the internal space to be freely opened, even after the extra length portion of the communication cable is wound around the outer peripheral portion, An operator can access the internal space, and the communication cable can be easily routed.

Exemplary embodiments of an optical receiver including an optical fiber holder according to the present invention will be described below in detail with reference to the accompanying drawings. First, [I] the basic concept of the embodiment will be described, then [II] the specific contents of the embodiment will be described, and finally, [III] a modification to the embodiment will be described. However, the present invention is not limited to each embodiment.

[I] Basic concept common to the embodiments First, the basic concept of the embodiment will be described. The present invention generally relates to a structure for accommodating an extra length portion of a communication cable drawn into a casing of a communication device in the casing. Here, the communication device includes all devices that may need to accommodate communication cables. Specifically, the above-described optical receiver and indoor optical fiber termination device (ONU: Optical Network Unit). Is applicable. Moreover, the specific structure and name of the communication cable are arbitrary, and the communication cable including the coaxial cable is applicable in addition to the optical fiber described above. In the following embodiments, a case where an optical fiber is accommodated in an optical receiver will be described.

  One of the characteristics of this housing structure is that a communication cable holder is provided in the housing of an optical receiver as a communication device. The communication cable holder has a cylindrical shape as a whole, and can hold the optical fiber by winding it along the axial direction. The communication cable holder is detachably attached to the housing of the optical receiver, and can be detached from the housing when the optical fiber is wound.

[II] Specific Contents of Embodiment Specific contents of the present embodiment will be described in detail below with reference to the accompanying drawings.

(Basic configuration of optical receiver)
First, the basic configuration of the optical receiver will be described. 1 is a perspective view of the optical receiver according to the present embodiment with the cover portion opened, FIG. 2 is a front view of the optical receiver of FIG. 1 with the cover portion removed, and FIG. 3 shows the light of FIG. FIG. 4 is a bottom view of the receiver, FIG. 4 is a perspective view of the optical receiver of FIG. 1 with the optical fiber holder removed, and FIG. 5 is a signal system diagram conceptually showing a signal transmission path in the optical receiver.

  The optical receiver 1 is installed on an indoor or outdoor wall surface of an ordinary house or the like in FTTH, and communication data and video data transmitted on an optical fiber laid outdoors are transferred to each device such as a personal computer or a TV in the home. It is for relay transmission, and a communication device such as a photoelectric conversion unit 30 is provided inside the casing 10. Here, first, in order to show the function of the optical receiver 1, a signal transmission path in the optical receiver 1 will be described. As shown in FIG. 5, schematically, the optical fibers OF1 and OF2 are drawn into the optical receiver 1 by the two-core cable 13 for transmitting the video signal and the communication signal, and the optical fiber OF1 for the video signal is The mechanical splice MS1 and the optical fiber OF2 for communication signals are connected to the other optical fibers OF3 and OF4 via the mechanical splice MS2, respectively.

  The optical fiber OF3 that receives the video signal is connected to the photoelectric conversion unit 30 in which the video signal is converted from an optical signal to an electrical signal. The video signal as an electrical signal is transmitted to a coaxial cable (not shown) via the connection terminal 31 of the photoelectric conversion unit 30 and connected to a home communication device and a video monitoring device. Power supply to the photoelectric conversion unit 30 is realized by drawing the power cable 32 from the outside of the optical receiver 1 into the housing 10. On the other hand, the optical fiber OF4 for communication signal transmission is pulled out from the housing 10 of the optical receiver 1 and connected to a predetermined home communication device.

  Next, an outline of the configuration of the optical receiver 1 for achieving such signal transmission will be described. As shown in FIGS. 1 to 4, the optical receiver 1 is configured such that an optical fiber holder 20 as a communication cable holder and a photoelectric conversion unit 30 are detachably housed inside a housing 10. . Among these, the housing | casing 10 is a structure of the optical receiver 1, and is a protection means which protects the optical fiber holder 20 and the photoelectric conversion unit 30 from the outside. The housing 10 is configured to include a substantially box-shaped base portion 11 having an open front surface, and a cover portion 12 that substantially covers the base portion 11 from the open surface side. Is pivotally supported with respect to the shaft. As shown in FIGS. 3 and 4, an opening 11 a for fitting the cylindrical lower end of the optical fiber holder 20 and a connection terminal 31 of the photoelectric conversion unit 30 are provided outside the housing on the bottom surface of the base portion 11. A pair of openings 11b for drawing out is formed. As will be described later, the optical fiber and the power cable 32 can be drawn into the housing 10 of the optical receiver 1 through the end of the optical fiber holder 20 exposed from the opening 11a to the outside of the housing, or An optical fiber can be drawn out from the inside of the housing 10 to the outside. A coaxial cable is connected to the connection terminal 31 of the photoelectric conversion unit 30 drawn out from the opening 11b.

  Moreover, in FIGS. 1-4, the photoelectric conversion unit 30 is a photoelectric conversion means which converts an optical signal into an electric signal. This photoelectric conversion unit 30 is formed in a substantially rectangular parallelepiped shape, and an optical fiber can be connected to a connection terminal 33 provided on the upper side via an optical connector, and an optical signal is received by a photoelectric conversion circuit (not shown) provided therein. It can be converted into an electrical signal, and the electrical signal can be output to the coaxial cable via a pair of connection terminals 31 provided below the electrical signal.

  The optical fiber holder 20 is a means for organizing and accommodating optical fibers in the optical receiver 1 and is detachably accommodated in the housing 10. Specifically, as shown in FIG. 4, the base portion 11 of the housing 10 includes a locking claw 11 c at the upper part of the housing position of the optical fiber holder 20, It functions as a fixing means for the optical fiber holder 20. That is, as shown in FIG. 1, with the lower end of the optical fiber holder 20 fitted into the opening 11a, the optical fiber holder 20 is pressed against the base portion 11 so that the upper portion thereof is engaged with the locking claw 11c. It is designed to engage elastically. Removal of the optical fiber holder 20 is performed by releasing the engagement by pushing the locking claw 11c upward with the claw. In addition, a pair of protrusions 11d and 11d are formed substantially at the center of the housing position of the optical fiber holder 20, and these engage with engaging recesses 23d and 23d of the optical fiber holder 20 described later, thereby The optical fiber holder 20 is positioned.

  As shown in FIGS. 1 and 2, the optical fiber holder 20 has a substantially cylindrical shape, and an extra length portion of the optical fiber can be wound around and held on the outer peripheral portion thereof. The radius of the outer peripheral portion is formed to be equal to or larger than the minimum bending radius of the optical fiber wound around here. The optical fiber holder 20 can also fix the mechanical splices MS1 and MS2 on the outer peripheral surface thereof.

(Configuration of optical fiber holder 20)
Next, a specific configuration of the optical fiber holder 20 will be described. 6 is a perspective view of the optical fiber holder 20 as viewed from above, FIG. 7 is a perspective view of the optical fiber holder 20 as viewed from below, FIG. 8 is a view of the optical fiber holder 20, and FIG. A top view, (b) is a right side view, and (c) is a bottom view. As shown in these drawings, the optical fiber holder 20 has a cylindrical shape having a predetermined length as a whole, and the first optical fiber holder 20 is wound around the outer peripheral portion 21 along the axial direction thereof. The part 22, the splice fixing part 23, and the second winding holding part 24 are sequentially arranged and formed.

  A pair of fiber pressing pieces 25 and 25 are provided on both sides of the first winding holding part 22. One end of each of the fiber pressing pieces 25 and 25 is fixed to the outer peripheral portion 21 of the optical fiber holder, and a predetermined gap is secured with respect to the surface of the first winding holder 22 along the axis of the holder. Are arranged to extend. Therefore, when the extra length portion of the optical fiber is wound around the first winding holding portion 22, winding is performed on the open end side of the fiber pressing piece 25, and the wound extra length portion is sequentially arranged on the fixed end side of the fiber pressing piece 25. The excess length portion of the optical fiber is held in the gap between the first winding holding portion 22 and the fiber pressing piece 25. The gap formed by the fiber pressing piece 25 is preferably in a state in which the optical fiber is sandwiched by a relatively loose force. Therefore, it is preferable that the gap corresponds to the coating diameter of the core wire of the optical fiber. A certain amount of clearance may be present between the optical fiber and the optical fiber as long as the optical fiber is not easily detached from the winding holding unit 22.

  Further, communication holes 26 and 26 are formed in the first winding holding part 22 just below the fiber pressing pieces 25 and 25. The communication holes 26, 26 are for drawing out an optical fiber drawn from the outside into the inner space of the optical fiber holder 20, which will be described later, to the outer peripheral portion 21 of the optical fiber holder 20, and are drawn out from the communication hole 26. The excess length portion of the optical fiber can be immediately wound around the first winding holding portion 22.

  The splice fixing portion 23 is a region for fixing a mechanical splice for connecting a pair of optical fibers. As shown in FIG. 6, the splice fixing portion 23 is formed by a pair of locking claws 23 a formed on the upper surface side of the outer peripheral portion 21. As shown in FIG. 7, the second mechanical splice can be detachably fixed by a pair of locking claws 23b formed on the lower surface side, as shown in FIG. One end of the optical fiber wound around the first winding holding part 22 is attached to one end of the mechanical splice fixed here, and the optical fiber wound around the second winding holding part 24 is attached to the other end. One end of the optical fiber is mounted, where the pair of optical fibers are mechanically and optically coupled.

  The opposing distance between each pair of locking claws 23a and 23b is substantially formed in accordance with the size of the mechanical splice to be fixed thereto. By pressing the mechanical splice against the upper inclined surface of the locking claws from above, After it opens on both sides and accepts the mechanical splice, it engages resiliently to secure the mechanical splice securely. To remove the mechanical splice, the locking claws 23a and 23b are pushed open with the claws, and the mechanical splice between them is taken out. As shown in FIG. 7, a concave portion 23c corresponding to the size is formed in a region where the mechanical splice on the lower surface side is accommodated, and the upper half portion is in the concave portion 23c in a state where the mechanical splice is fixed. To fit in. By doing so, the protruding amount of the mechanical splice from the lower surface side of the optical fiber holder 20 is reduced, and as a result, a useless gap on the installation surface of the optical fiber holder 20 with respect to the housing 10 of the optical receiver can be further reduced. It becomes like this.

  Similarly to the first winding holding part 22, the second winding holding part 24 is provided with a pair of fiber pressing pieces 27, 27 on both sides thereof. One end of each of the fiber pressing pieces 27, 27 is fixed to the outer peripheral portion 21 of the optical fiber holder, and a predetermined gap is secured with respect to the surface of the second winding holder 24 along the axis of the holder. The function is the same as that of the fiber pressing pieces 25, 25.

  The optical fiber holder 20 also includes a fitting portion 28 raised in a cylindrical shape on the lower end side thereof. The outer diameter of the fitting portion 28 is just sized to fit into the opening 11a (see FIG. 4) formed in the housing 10 of the optical receiver, and the optical fiber holder 20 is optically received as described above. When accommodated in the machine 1, the optical fiber holder 20 is firmly fixed in the housing by the engagement of the fitting portion 28 and the opening 11a and the engagement by the locking claw 11c.

  As will be described in more detail later, the optical fiber holder 20 has an internal space extending in the longitudinal direction, and as shown in FIG. 8C, the bottom wall 20a has three communication holes. 35, 36, and 37 are formed. An optical fiber two-core cable from the outside of the optical receiver 1 is passed through the central communication hole 35 and guided into the optical receiver 1. Further, a two-core cable of an optical fiber from the inside of the optical receiver 1 is passed through the communication hole 36 and guided to the outside of the optical receiver 1. In addition, a power cable from the outside of the optical receiver 1 is passed through the communication hole 37 and guided into the optical receiver 1. As will be described later, the bottom wall 20a has a divided structure, and holds and holds the cables passed through these communication holes in a closed state as shown in the figure.

  Next, the open structure of the optical fiber holder 20 will be described with reference to FIGS. 9 is a perspective view in a state where the internal space of the optical fiber holder 20 is opened, FIG. 10 is a perspective view in a state where only the separation opening / closing portion is closed from the state of FIG. 9, and FIG. 11 is an internal space of the optical fiber holder 20 It is a figure which shows the state which open | released, (a) is a top view, (b) is a bottom view. As shown in each of these drawings, the optical fiber holder 20 has a lower half portion 20b and an upper half portion 20c, which are separated vertically along the longitudinal direction of the cylinder, on one side of the open structure. The hinge 20d is provided so as to be openable and closable. A bottom wall 20a is formed on the lower end side of the upper half portion 20b and the lower half portion 20c, while the upper end side is open. With the upper half 20b and the lower half 20c closed, an internal space S is formed therein.

  The upper half portion 20b is further configured as a separate opening / closing portion 20e whose lower end side is opened / closed independently of the lower half portion 20c. The separation opening / closing portion 20e is provided with the bottom wall 20a, and a locking claw 20f that is elastically engaged with the stepped portion 20g of the lower half portion 20c is formed. As shown particularly well in FIG. 10, the separation opening / closing portion 20e can be closed independently even when the upper half portion 20b is open with respect to the lower half portion 20c, and the upper half portion 20b. Even in the closed state, it can be opened independently to open only the internal space S in the vicinity of the bottom wall 20a. The cables are passed through the communication holes 35 to 37 formed in the bottom wall 20a with the separation opening / closing portion 20e opened, and the separation opening / closing portion 20e is closed with the drawing amount determined. Therefore, it is sandwiched and held here. Further, the separation opening / closing part 20e is provided with a communication hole 20h in the upper part thereof. As will be described later, the communication hole 20h is for guiding the optical fiber from the outside of the optical fiber holder 20 to the internal space S, and further to the communication hole 36. In the present embodiment, the abutment portion between the upper half portion 20b and the lower half portion 20c is not provided with a locking means such as the locking claw 20f, but here the extra length of the optical fiber This is not always necessary because the parts will be wound and the force will keep them closed. But you may provide a latching means similarly.

(Optical fiber accommodation procedure)
Next, a procedure for accommodating the extra length portion of the optical fiber introduced into the optical receiver 1 using the optical fiber holder 20 will be described. For this description, reference is made to FIGS. 1, 4, 5, 9 and 12 to 14. In the initial state, as shown in FIG. 4, a photoelectric conversion unit 30 is installed in the housing 10 of the optical receiver 1. Here, the two-core cable 13 of the optical fiber and the power cable 32 of the photoelectric conversion unit 30 are drawn into the casing from the opening 11a of the casing 10 shown in FIG.

  9, the upper half 20b of the optical fiber holder 20 is opened with respect to the lower half 20c, and the drawn two-core cable 13 and the power cable 32 are passed through the communication holes 35 and 37, respectively. After confirming the pull-in amount, only the separation opening / closing part 20e is closed as shown in FIG. In this state, each cable is positioned between the cables. The power cable 32 passes straight through the internal space S and is pulled out from the upper end. On the other hand, the coating of the two-core cable 13 is peeled off at this position to expose the internal optical fibers OF1 and OF2, and in this state, the two-core cable 13 is drawn out through the communication hole 26.

  The upper half portion 20b is closed with the optical fibers OF1, OF2 and the power cable 32 pulled out from the internal space S to the outside. The extra length portions of the optical fibers OF1 and OF2 drawn out from the communication hole 26 to the outside of the optical fiber holder 20 are wound around the first winding holder 22 as shown in FIG. At this time, the winding to the first winding holding part 22 is performed at the open end position of the fiber pressing piece 25, and the work is efficiently performed by sequentially sliding to the fixed end side.

  Then, the tips of the optical fibers OF1 and OF2 are fixed to the mechanical splices MS1 and MS2, while the tips of the optical fibers OF3 and OF4 are also fixed to the mechanical splices MS1 and MS2, and these are connected using a connecting tool. Provides mechanical and optical connection between optical fibers. As shown in FIG. 13, the mechanical splice MS1 with the optical fiber connected in this way is fixed to the locking claw 23a of the splice fixing portion 23, and the mechanical splice MS2 is similarly held by the optical fiber. It fixes to the latching claw 23b (refer FIG. 7) of the body back side. In this state, the optical fibers OF3 and OF4 are wound around the second winding holding unit 24 this time. At this time, winding is performed on the second winding holding portion 24 at the open end position of the fiber pressing piece 27, and the work is efficiently performed by sequentially sliding to the fixed end side. Of the optical fibers wound around the second winding holder 24, one optical fiber OF4 is drawn out of the optical receiver housing 10 from the lower side of the optical fiber holder 20, As shown in FIG. 13, the separation opening / closing part 20e is opened. That is, the locking claw 20f is released, the separation opening / closing part 20e is opened once, the optical fiber OF4 is drawn into the internal space S of the optical fiber holder 20, and the portion of the cable 14 covering this is passed through the communication hole 36, The separation opening / closing part 20e is closed again to fix it. FIG. 14 shows this state, and it can be seen that the optical fiber OF4 is drawn into the internal space from the communication hole 20h and further drawn out from the communication hole 36.

  In this way, the work of winding and holding the extra length portions of the optical fibers OF1 to OF4 around the optical fiber holder 20 is completed. In this state, the optical fiber holder 20 is fixed in the housing 10 of the optical receiver as shown in FIG. That is, by pressing the optical fiber holder 20 against the base portion 11 with the lower end of the optical fiber holder 20 fitted into the opening 11a, the upper portion thereof is elastically engaged with the locking claw 11c. . Then, the power cable 32 drawn out from the upper part of the optical fiber holder 20 is connected to the power terminal of the photoelectric conversion unit 30, and the optical fiber OF3 is connected to the connection terminal 33 of the photoelectric conversion unit 30 via an optical connector. Thus, the wiring work inside the optical receiver 1 is completed.

[III] Modifications to Embodiments While the embodiments of the present invention have been described above, specific configurations and means of the present invention are within the scope of the technical idea of each invention described in the claims. Any modification and improvement can be made. Hereinafter, such a modification will be described.

(Regarding the field of application of the present invention)
The application target of the present invention is not limited to the optical receiver as described above, but any device that can fix a communication cable such as an optical fiber storage box, an optical converter, and other optical fibers OF1 to OF4. The same applies to devices. The present invention also provides an optical receiver having a function of separating a signal from a single introduced optical fiber into a plurality of optical fibers by providing a WDM (Wavelength Division Multiplexing) filter in the housing of the optical receiver. In this case, the optical fiber holder may further include means for fixing the WDM filter.

(About problems to be solved and effects of the invention)
First, the problems to be solved by the invention and the effects of the invention are not limited to the above-described contents, and the present invention solves the problems not described above or has the effects not described above. There are also cases where only some of the described problems are solved or only some of the described effects are achieved. For example, even in the case where there is a work efficiency better related to winding of the optical fiber than the structure according to the present invention in the prior art, if the housing efficiency of the optical fiber in the housing is superior to that of the prior art, It can be said that the object of the present invention has been achieved.

(About the optical fiber holder 20)
The specific shape of the optical fiber holder 20 is not limited to the illustrated example. In the embodiment, the optical fiber holder 20 has a cylindrical shape, but may have a polygonal cylindrical shape, and a part of the optical fiber holder 20 may be formed, for example, the bottom wall 20a at the lower end, even if the substantially entire region is not formed hollow. An internal space may be formed only in the vicinity of. Further, the shape, arrangement, and number of the fiber holding pieces 25 and 27 and the shape, arrangement, and number of the splice fixing portion 23 are not limited to those shown here, and the entire optical receiver is designed and mounted. It can be determined appropriately depending on the mode of the communication device. Further, when it is not necessary to introduce an optical fiber into the internal space, the optical fiber holder 20 may be formed as a solid rod-like body, and the optical fiber may be wound around the outer periphery thereof. Further, one end of the optical fiber holder 20 does not necessarily have to be pulled out of the optical receiver 1 and may be completely accommodated inside the optical receiver 1.

  The present invention can be applied to an apparatus that needs to accommodate various optical fibers, and is useful for improving workability and certainty of accommodating optical fibers.

It is a perspective view in the state where the cover part of the optical receiver concerning this embodiment was opened. It is a front view in the state where the cover part of the optical receiver of Drawing 1 was removed. It is a bottom view of the optical receiver of FIG. It is a perspective view in the state where the optical fiber holder was removed in the optical receiver of FIG. It is a signal system diagram which shows notionally the transmission path of the signal in an optical receiver. It is the perspective view which looked at the optical fiber holder 20 from upper direction. It is the perspective view which looked at the optical fiber holding body 20 from the downward direction. It is a figure which shows the optical fiber holding body 20, (a) is a top view, (b) is a right view, (c) is a bottom view. FIG. 3 is a perspective view in a state where an internal space of the optical fiber holder 20 is opened. FIG. 10 is a perspective view of a state in which only the separation opening / closing part is closed from the state of FIG. 9. It is a figure which shows the state which open | released the internal space of the optical fiber holder 20, (a) is a top view, (b) is a bottom view. It is a perspective view of the optical fiber holder 20 for demonstrating the winding operation | work of an optical fiber. It is a perspective view of the optical fiber holder 20 for demonstrating the winding operation | work of an optical fiber. It is a perspective view of the optical fiber holder 20 for demonstrating the winding operation | work of an optical fiber. It is a perspective view of the conventional optical receiver in the state where the cover part was opened.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical receiver 10 Case 11 Base part 11a, 11b Opening 11c Locking claw 11d Protrusion 12 Cover part 13 Two-core cable 14 Cable 20 Optical fiber holder 20a Bottom wall 20b Upper half part 20c Lower half part 20d Hinge part 20e Separation Opening / closing part 20f Locking claw 20g Step part 20h Communication hole 21 Outer peripheral part 22 First winding holding part 23 Splice fixing part 23 Engaging concave part 23a, 23b Locking claw 23c concave part 24 Second winding holding part 25, 27 Fiber presser Piece 26 Communication hole 28 Fitting part 30 Photoelectric conversion unit 31 Connection terminal 32 Power supply cable 33 Connection terminal 35-37 Communication hole OF1-OF4 Optical fibers MS1, MS2 Mechanical splice

Claims (8)

Is configured as a rod-shaped body of hollow or solid, an optical fiber holder that can hold wound surplus length portion of the optical fiber to the outer circumference of the rod-like body, and an internal space capable of introducing the optical fiber, wherein An optical fiber introduced into the inner space can be led out to the outer peripheral portion, and an optical fiber can be introduced into or led out from the inner space at one end of the rod-shaped body and the optical fiber is sandwiched An optical fiber holder having a second communication part for holding;
An optical signal is converted into an electrical signal, is formed in a substantially rectangular parallelepiped shape, and a first connection terminal for outputting the electrical signal to the coaxial cable is disposed on one surface and extends from the other end of the rod-shaped body. A second conversion terminal for connecting the optical fiber via an optical connector is arranged on the surface opposite to the arrangement surface of the first connection terminal;
A substantially box-shaped housing that detachably accommodates the optical fiber holder and the photoelectric conversion means for fitting one end of the rod-shaped body provided with the second communication portion. A housing in which a first opening and a second opening for pulling out the first connection terminal are provided on the same side surface;
With optical receiver. One end of the rod-like body provided with the second communication portion is exposed to the outside of the housing through the first opening, and the first connection terminal is exposed through the second opening. Exposed outside the housing,
The optical receiver according to claim 1. It said optical fiber holder has e Bei the connector fixing means for fixing the connecting device for connecting a pair of optical fibers to each other,
The optical receiver according to claim 1 or 2. The outer peripheral portion of the pair of optical fibers connected to said connecting device fixed to said connecting device fixing unit, a first winding holding portion capable of holding wrapped one optical fiber, the other optical fiber A second winding holding unit capable of winding and holding ,
The optical receiver according to claim 3. The optical fiber holder has a cylindrical shape, and the first winding holding portion, the connector fixing means, and the second winding holding portion are sequentially arranged along the longitudinal direction of the cylindrical shape.
The optical receiver according to claim 4 . The outer peripheral portion includes cable pressing means extending along the winding axis direction of the optical fiber, and the extra length portion of the optical fiber is held between the cable pressing means and the outer peripheral portion.
The optical receiver as described in any one of Claim 1 to 5. The optical fiber holder is capable of introducing or deriving a power cable for a predetermined communication device with respect to the internal space at one end of the rod-shaped body, and holding and holding the power cable . With a communication part,
The optical receiver as described in any one of Claim 1 to 6. The optical fiber holder includes a second outer peripheral portion that does not wind and hold the extra length portion of the optical fiber, and a part of the second outer peripheral portion is separated from the outer peripheral portion so that it can be opened and closed. A part of the internal space can be opened freely .
The optical receiver as described in any one of Claim 1 to 7.

Images