JP2004333835A - Optical subscriber's line terminating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical subscriber's line terminating device which improves efficiency and reliability of installation work and maintenance work after installation. <P>SOLUTION: The optical subscriber's line terminating device has optical subscriber device main body 1 with circuits for optical subscriber terminals internally packaged, optical fiber housing section 2 for housing optical fibers 4, and a main body cover 3 for covering the optical fiber housing section 2. The optical fiber housing section 2 is attachably and detachably installed at the upper part of the device main body 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an optical network unit for performing optical communication between an optical communication station and a subscriber-side optical communication device.
[0002]
[Prior art]
As a conventional optical network unit, for example, the one shown in FIG. 8 is known. This apparatus has a configuration in which a main board, an Ethernet card, and the like (not shown) are stored in an apparatus main body 101, and an optical fiber storage space 102 laid from an optical communication station is provided on an upper surface thereof.
[0003]
The reason for providing the optical fiber storage space 102 in the apparatus main body 101 is as follows. That is, first, it is desirable to provide the optical fiber 104 with a certain amount of extra optical fiber portion 105 for convenience in installation or use. In particular, unlike the conventional copper cored cable, the optical fiber 104 requires advanced technology for connection, so cutting and adjusting the length of the optical fiber 104 each time requires the reliability and workability of the optical fiber 104. It is not preferable from the viewpoint of efficiency, and it is desirable that the connection itself can be easily performed by an optical connector (not shown) while securing an appropriate extra optical fiber portion 105. On the other hand, the optical network unit is used in any of a wall-mounted mode and a desk-mounted mode. In the case of a desk-mounted mode, the extra length of the optical fiber 105 can be relatively easily processed by utilizing a space under the floor. On the other hand, in the case of wall-mounted installation, a space for processing the extra length of the optical fiber 105 cannot be often secured around the apparatus. Therefore, it is necessary to secure an optical fiber extra length processing space 102 for accommodating the extra optical fiber portion 105 inside the optical network unit.
[0004]
Further, the conventional optical network unit shown in FIG. 8 has a problem in maintenance and maintenance as described later, so that the device can be separated into a part to be maintained and other parts. It is also considered that. For example, as shown in FIG. 9, Patent Document 1 discloses a device main body 201 containing an optical network unit and an extra length of an optical fiber connecting the optical network unit and the optical communication station. (Not shown), and covers 203 and 204. The optical fiber storage space 202 is detachably attached to the outer surface of the bottom plate of the apparatus main body 201. An optical line terminal having a wall-mounted structure provided at 202 is disclosed. According to this configuration, by installing the optical fiber storage space 202 in advance when installing the optical network unit, the optical fiber wiring and extra length processing can be performed independently before the installation of the device main body 201.
[0005]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2002-258062
[Problems to be solved by the invention]
The work at the time of installation or maintenance of the optical network unit is mainly performed by an optical fiber. That is, when the optical network unit is installed, it is necessary to wire the optical fiber and to process the extra length, and for maintenance after the installation and replacement of the main body, it is necessary to remove the optical fiber from the optical network unit and rewiring. In some cases, complicated reprocessing of the optical fiber extra length may occur. However, as shown in the conventional example shown in FIG. 8, when the optical fiber storage space 102 is integrated with the apparatus main body 101, a problem in maintenance and maintenance occurs as described below. That is, if the apparatus main body 101 is already fixed to a wall or the like, the operator may be forced to take an unreasonable posture depending on the installation location, the work time may be prolonged, and the work efficiency may be reduced. Also, during operation, a tool such as a driver may accidentally enter the inside of the apparatus main body 101, thereby causing a short circuit failure of the functional unit and a failure to stop the function of the apparatus. There is also the possibility. As described above, the conventional optical network unit shown in FIG. 8 has much room for improvement in work efficiency and reliability.
[0007]
On the other hand, as shown in FIG. 9, the following problem still exists in the conventional optical network unit in which the apparatus main body 201 and the optical fiber storage space 202 are configured to be separable. That is, in this prior art, the optical fiber is stored in the back side of the apparatus main body 201 as a result of placing importance on enabling the optical fiber to be wired in advance when installing the optical network unit. Therefore, when the optical network unit is installed on a wall, the optical fiber storage space 202 is hung on the wall, and it is not expected to improve the work efficiency when installing the optical network unit. In addition, at the time of maintenance and inspection after installation and replacement of the optical network unit, it is necessary to remove the device main body 201 once and then perform maintenance and inspection and replacement of the optical fiber, which is complicated.
[0008]
As described above, in the conventional technology, since the apparatus main body and the extra length processing space of the optical fiber are integrated, the wiring work of the optical fiber becomes complicated and the working efficiency is deteriorated. There has been a possibility that the reliability of the work may be reduced due to the occurrence of a short circuit failure. For this purpose, a technology for separating the extra length processing space of the apparatus main body and the optical fiber has been disclosed, but maintenance work after installation is still complicated, and has not yet been fundamentally improved.
[0009]
Therefore, an object of the present invention is to provide an optical network unit that improves the efficiency and reliability of installation work and maintenance work after installation.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides an apparatus main body in which various circuits of an optical subscriber terminal are combined and mounted therein, and an optical fiber which is detachably installed on an upper surface of the apparatus main body and stores an optical fiber. It has a storage part and a main body cover which covers the optical fiber storage part.
[0011]
According to the present invention, since the apparatus main body and the fiber storage section are detachably installed, the wiring of the optical fiber and the extra length processing can be performed with the optical fiber storage section removed from the apparatus main body. Further, since the optical fiber housing is installed on the upper surface of the apparatus main body, it is possible to maintain the optical fiber, which is the main target of the maintenance work, without removing the apparatus main body even during maintenance after installation of the apparatus. As a result, installation and maintenance work becomes easier, work efficiency can be improved, and the risk of a tool such as a screwdriver entering during work is significantly reduced, thereby improving work reliability.
[0012]
Further, the present invention may be configured to have an engagement structure for detachably fixing the optical fiber housing to the apparatus main body. Thus, when the optical fiber storage unit is separated from the apparatus main body, components such as screws are unnecessary, and can be attached and detached with a single touch, thereby improving work efficiency. Since a tool such as a screwdriver is not used at the time of attachment / detachment, the danger of a secondary failure such as a short circuit accident is reduced, and work reliability is improved.
[0013]
Further, the present invention may be configured such that the engaging structure can be detached by sliding the optical fiber housing horizontally with respect to the apparatus main body. This not only eliminates the need for screws and other components when separating the optical fiber housing from the device body, but also eliminates the need to apply unnecessary force to the engagement structure, reducing the load on the engagement structure and allowing long-term use. It is possible to reduce the possibility that a failure of the engagement structure will occur later, and it also contributes to the reliability and long life of the device itself.
[0014]
Further, according to the present invention, the engaging structure comprises a claw provided on the optical fiber housing portion and a protrusion provided on the upper surface of the device main body, and the claw is inserted into a gap formed between the upper surface of the device body and the protrusion. It may be characterized by being formed by doing. Thus, by simply sliding the optical fiber storage section with respect to the apparatus main body, the optical fiber storage section and the apparatus main body can be securely fixed to each other by the frictional force generated between the projection and the gap. Thus, the optical network unit can be easily removed, which leads to an improvement in the reliability, work efficiency and work reliability of the optical network unit.
[0015]
Further, the present invention may be characterized in that the main body cover and the apparatus main body are fixed by an engagement structure. As a result, the main body cover can be easily attached to and detached from the apparatus main body, which leads to further improvement in work efficiency.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings.
[0017]
1A and 1B are external views of an optical network unit according to an embodiment of the present invention, wherein FIG. 1A is a front view, and FIGS. 1B and 1C are side views. FIG. 2 is a front view of the optical network unit shown in FIG. In addition, here, assuming that it is used in a wall-mounted state, FIG. 1A illustrates a front view of a surface mounted on a wall, but in the case of a desk-mounted installation, Mean top view. Further, in the following description, the upper surface means a surface appearing in a front view when attached to a wall, that is, a surface appearing in FIG. FIG. 3 is an exploded perspective view showing a mutual configuration relationship among the device main body 1, the optical fiber storage section 2, and the device main body cover 3 of the optical network unit shown in FIG.
[0018]
The optical line terminal according to the present embodiment includes an apparatus main body 1 in which various circuits of an optical subscriber terminal are combined and mounted therein, an optical fiber housing 2 for winding and storing an optical fiber, and an optical fiber And a device main body cover 3 that covers the storage section 2. The above-mentioned various circuits are constituted by a main board, an Ethernet card and the like (not shown) as in the conventional technology, and provide various functions necessary for optical communication as in the conventional technology. The optical fiber housing 2 is disposed on the upper surface of the apparatus main body 1, and the apparatus main body 1 and the optical fiber housing 2 are configured to be separable. In addition, the optical fiber housing 2 is provided with two opposing claws 21. On the other hand, the projections 11 are provided on the device main body 1 at positions corresponding to the claws 21 so as to form a gap between the upper surface of the device main body 1 and the claws 21. The claws 21 and the projections 11 form an engagement structure for fixing the apparatus main body 1 and the optical fiber housing 2. FIG. 4 shows a detailed view of the claws 21 and the projections 11. The optical fiber housing 2 and the apparatus main body 1 are engaged by the optical fiber housing 2 sliding on the apparatus main body 1 and the claws 21 being inserted into the gaps 12 formed between the projections 11 and the apparatus main body 1. And are fixed by the frictional force acting between the claw 21 and the projection 11. Further, after the optical fiber storage section 2 is engaged and mounted on the apparatus main body 1 by the claws 21 and the projections 11, the apparatus main body cover 3 is mounted so as to cover the optical fiber storage section 2. The device body cover 3 is provided with an engagement piece 31. By engaging with an engagement piece (not shown) provided at a corresponding position of the device body 1, the upper surface of the optical fiber storage section 2 is brought into contact with the device body. It will be covered with the cover 3.
[0019]
When installing the optical network unit, first install the main unit 1 on a wall or a desk, and then replace the optical fiber 4 previously laid from the optical communication station side to a length having an appropriate extra length as necessary. Adjust and install connector 5a at the end. Then, as shown in FIG. 5, the extra length 41 of the optical fiber is wired inside the optical fiber housing 2 which is separated from the apparatus main body 1 in advance. Specifically, the extra optical fiber portion 41 is wound around the extra length storage space 22 provided inside the optical fiber storage portion 2, and is appropriately fixed by the claw 23. Thereafter, the optical fiber housing 2 around which the extra optical fiber portion 41 is wound and attached is mounted on the device main body 1 while sliding, and the connector 5a provided in the device main body 1 and the end of the extra optical fiber end portion 41 are attached. The connector 5b provided is connected, and finally the apparatus body cover 3 is mounted on the upper surface of the optical fiber housing 2.
[0020]
As described above, according to the present embodiment, since the apparatus main body 1 and the optical fiber storage section 2 are detachably installed, the wiring and the extra length processing of the optical fiber 4 are performed with the optical fiber storage section 2 removed from the apparatus main body 1. Becomes possible. Further, since the optical fiber storage unit 2 is installed on the upper surface of the apparatus main body 1, the maintenance of the optical fiber 4, which is a main object of the maintenance work, is performed without removing the apparatus main body 1 even during the maintenance after the installation of the optical network unit. Becomes possible. As a result, installation and maintenance work becomes easier, work efficiency can be improved, and the risk of a tool such as a screwdriver entering during work is significantly reduced, thereby improving work reliability.
[0021]
At the time of maintenance and inspection of the optical fiber 4, the device main body cover 3 is removed, the connectors 5a and 5b are detached, and the optical fiber mounting portion 2 is slid to be separated from the device main body 1, and maintenance and inspection of the optical fiber 4 are performed in this state. At the time of restoration, the reverse operation may be performed.
[0022]
Further, when the maintenance and inspection and replacement of the apparatus main body 1 are performed, after the apparatus main body 1 and the optical fiber storage unit 2 are separated according to the above procedure, the maintenance and inspection and replacement of the apparatus main body 1 are performed, and then the same recovery work is performed. Good.
[0023]
The optical network unit of the present invention is not limited to the above embodiment. For example, the engagement structure between the apparatus main body 1 and the optical fiber housing 2 is not limited to the location shown in FIG. 3, and the installation position is free. As an example, the claws 21 may be provided on the outer peripheral portion of the optical fiber housing portion 2, and the protrusions 11 may be provided at corresponding positions.
[0024]
Further, the engagement structure is not limited to the above embodiment. For example, as shown in FIG. 6, a claw 16 is provided to protrude from the upper surface of the apparatus main body 1, a protrusion 26 having an L-shaped cross section is provided to protrude from the bottom surface of the optical fiber housing 2, and the protrusion 26 is provided on the optical fiber housing 2. The engagement structure may be formed by being inserted into the gap 17 formed between the bottom surface and the claw 16. Thus, the optical fiber storage section 2 can be easily attached to and detached from the apparatus main body 1 by sliding on the apparatus main body 1, thereby improving work efficiency and work reliability.
[0025]
Further, as shown in FIG. 7, not only the slide structure as described above, but also a projection 28 provided on the lower surface of the optical fiber housing 2 is pushed into a claw 18 provided at a corresponding position on the upper surface of the apparatus main body 1. The engagement structure can be formed by the structure.
[0026]
【The invention's effect】
As described above, according to the present invention, the main unit of the optical network unit and the optical fiber storage unit that is the main work for installation and maintenance can be completely separated, and the optical fiber storage unit is It is arranged on the upper surface of the main body. For this reason, at the time of installation, the work of wiring the optical fiber can be performed at hand, and the work can be performed in a more comfortable posture. On the other hand, the maintenance work after the installation can be performed by disposing only the optical fiber storage section while the apparatus main body is fixed, by arranging the optical fiber storage section on the upper surface of the apparatus main body, thereby improving work efficiency. Furthermore, the danger of a tool such as a driver erroneously entering the apparatus main body, which is a functional unit, is greatly reduced, and work reliability is greatly improved.
[Brief description of the drawings]
FIG. 1 is an external view of an optical network unit according to an embodiment of the present invention.
FIG. 2 is a front view of the optical network unit of the present invention shown in FIG. 1 with a device body cover removed.
FIG. 3 is an exploded perspective view showing a mutual configuration of an apparatus main body, an optical fiber storage section, and an apparatus main body cover of the optical network unit of the present invention shown in FIG. 1;
FIG. 4 is a detailed view of an engaging portion between the device main body and the optical fiber storage portion of the optical network unit of the present invention shown in FIG. 3;
FIG. 5 is a perspective view of the optical network unit of the present invention shown in FIG. 1 in a state where an optical fiber is installed and a device body cover is removed.
FIG. 6 is a detailed view of another embodiment of the optical subscriber line terminating device according to the present invention, which is a device main body and an engaging portion with an optical fiber housing portion.
FIG. 7 is a detailed view of another embodiment of the optical subscriber line terminating device according to the present invention, which is an engaging portion with the device main body and the optical fiber housing portion.
FIG. 8 is a perspective view of a conventional optical network unit with an optical fiber installed and a device body cover removed.
FIG. 9 is an exploded perspective view showing another example of the conventional optical network unit, in which an optical fiber is removed.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Device main body 11 Projection 12 Gap 16 Claw 17 Gap 18 Claw 2 Optical fiber storage part 21 Claw 22 Extra length storage space 23 Claw 26 Projection 28 Projection 3 Device body cover 31 Engagement piece 4 Optical fiber 41 Optical fiber extra length part 5a, 5b Connector

Claims (5)

An apparatus main body in which a circuit for an optical subscriber terminal is mounted,
An optical fiber storage section detachably installed on the upper surface of the apparatus main body and storing an optical fiber;
And a main body cover for covering the optical fiber storage section. 2. The optical network unit according to claim 1, further comprising an engagement structure for detachably fixing the optical fiber housing to the apparatus main body. The optical network unit according to claim 2, wherein the engagement structure is configured to be detachable by sliding the optical fiber storage section with respect to an upper surface of the apparatus main body. The engagement structure includes a claw provided in the optical fiber housing, and a protrusion provided on an upper surface of the device main body, and the claw is provided in a gap formed between the upper surface of the device main body and the protrusion. 4. The optical network unit according to claim 3, which is formed by insertion. The optical network unit according to any one of claims 1 to 4, further comprising an engagement structure for detachably fixing the body cover to the apparatus body.

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