JP4117227B2 - Optical receiver - Google Patents

Description

The present invention relates to the structure of an optical receiver mainly used in an optical transmission system.

In the conventional optical receiver, when connecting the optical fiber drawn into the case body and the optical fiber on the drawer side, it is necessary to connect both using a special tool. In consideration of the necessity of attaching an optical connector to the optical fiber drawn into the case body, the length of the optical fiber after removing the coating of the optical cable needs to be several tens of centimeters. For this reason, it is necessary to accommodate the extra length of the optical fiber after the connection between the two is completed. In this case, there is a danger that the optical fiber will be broken if it is wound smaller than a certain curvature. Therefore, in the conventional optical receiver, the cable should be wound with as much curvature as possible in consideration of safety for the optical cable and the optical fiber. By doing so, the extra length of optical cable and optical fiber were not damaged. (For example, see Patent Document 1)

Japanese Patent Laid-Open No. 7-325227

However, as in conventional optical receivers, if the optical fiber is wound around the winding frame with a curvature that is as large as possible so that the optical fiber is not damaged, the occupied area of the case for storing the optical fiber increases, and as a result, the case that accommodates it. There was a problem that became larger.
In addition, when the optical fiber is wound around the reel in a specified curvature range within a range where the optical fiber is not damaged, a display means and an output level indicating that power is supplied to the optical transmission unit and an optical signal is input. If the switching means for setting is provided, it is necessary to be able to check the display means and operate the switching means without applying stress to the optical fiber.
Therefore, in this application, it was made to solve these problems.
The purpose is to provide a compact optical receiver.
Another object is to provide an optical receiver with good operability that can be easily set without using tools or the like.
Another object of the present invention is to provide an optical receiver that is configured in a small size by including an optical fiber accommodating portion that accommodates an extra length of the optical fiber.
Another object is to place the optical fiber housing part on the case body so that the optical fiber housing part is housed on the open side of the case body with respect to the optical receiver, and touch the optical fiber from the opening side of the case body. An object of the present invention is to provide an optical receiver capable of operating and confirming the optical transmitter without any problems.
Another object is to provide an optical receiver in which countermeasures are taken against erroneous operation of the optical transmitter and damage to the optical fiber.

In order to solve the above-mentioned problems, the invention of claim 1 is characterized in that an optical fiber drawn from outside is connected via an optical adapter, thereby receiving an optical receiver for receiving light from the optical fiber , and drawing from outside. It has a winding frame that can wind an optical fiber with a curvature within a specified range, and by winding the optical fiber around the winding frame, the end side of the optical fiber can be connected to the optical adapter in the optical receiver an optical fiber accommodating portion capable of reaching at a direction, in the optical receiver is accommodated in the electronic device case, and the electronic device case includes a case body the front is opened, the opening portion of the case body consists of a lid for covering, comprising a wall mounting member on the side of the rear of the case body, the light receiving portion is unitized case having a shielding effect, the front of the case, cable The display means can check the operation status of the light receiving section from the outside, the display and operation unit which gave an operation unit for accepting an operation for controlling the plurality of light receiving portions from the outside of the casing is provided, the The optical fiber housing portion includes a substrate and at least one reel that is provided in the front surface direction of the substrate and allows the optical fiber to be attached within the range of the safety curvature. At least one of the reels includes , A through-hole penetrating the substrate is provided in a region surrounded by the peripheral wall of the winding frame, and the optical receiving unit and the optical fiber receiving unit are configured such that the optical fiber receiving unit is in the case with respect to the optical receiving unit The case main body is housed in the case main body so as to be on the open side of the main body, and the display / operation unit is disposed so as to oppose at least one through hole provided in the optical fiber housing unit. From Configured to allow certification and operation.

According to a second aspect of the present invention, the display / operation unit of the light receiving unit is disposed so as not to protrude from the front side end of the winding frame of the optical fiber housing unit.

As described above in detail, according to the first aspect of the present invention, in the optical receiver in which the optical receiving unit and the optical fiber housing unit are housed in the electronic device case, the electronic device case is a case whose front is opened. The main body and a lid that covers the open portion of the case main body, and a wall surface mounting member is provided on the back side of the main body, and the optical receiver is unitized by a case having a shielding effect. One side surface of the case is provided with a display / operation unit including a display unit that can confirm the operation state of the optical receiver from the outside of the case and a control unit that can control the optical receiver. The fiber housing portion includes a substrate and at least one reel that can be attached to the substrate within the range of the safety curvature, and at least one of the reels includes a middle of the reel. Penetrate the board to the position side And the optical receiver and the optical fiber housing are housed in the case body such that the optical fiber housing is on the open side of the case body with respect to the optical receiver. -The operation unit is arranged so as to oppose at least one through-hole provided in the optical fiber housing unit so that it can be confirmed and operated from the front side of the case body. Thus, it is possible to provide an optical receiver with good operability that allows confirmation of display and operation of the operation means from the front side of the case body without touching the extra length optical fiber accommodated in the case. Furthermore, the display / operation part of the optical receiver is arranged so as to oppose the through hole provided on the center position side of the reel, so that the occupied area can be reduced by effective use of the optical fiber housing part. As a result, the size of the optical receiver case can be reduced.

According to the second aspect of the present invention, the display / operation unit of the optical receiving unit is disposed so as not to protrude from the front side end of the winding frame of the optical fiber housing unit. Surrounded by the peripheral wall of the frame, it will be arranged in the depth direction of the case body within the range that does not affect the operation. For example, the operation part of the operation means is operated with the fingertip directly from the outside of the case of the light receiving part Even if it is placed slightly protruding from the case, when the extra length of optical fiber is accommodated, the operation unit may touch the optical fiber and damage the optical fiber, or the fingertip or optical fiber may be damaged. It is possible to provide a highly reliable optical receiver that can prevent an erroneous operation such as touching and switching the operation means. In addition, since it is not necessary to prepare a tool for operating the operation unit, an optical receiver that is highly useful in terms of ease of handling can be provided.

Hereinafter, an example of an embodiment embodying the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of an optical receiver according to the present invention. FIG. 2 is a view seen from the front side of the optical receiver of the present application. FIG. 3 is a partial cross-sectional view taken along line AA in FIG. FIG. 4 is a diagram showing another embodiment. FIG. 5 is a partially enlarged view of the vicinity of the optical adapter and the optical connector temporary fastener. FIG. 6 is a schematic system diagram using the optical receiver of the present application. FIG. 7 is a side view when the optical receiver of the present application is attached to a wall surface.

Reference numeral 1 denotes an optical receiver according to the present invention. In an optical transmission system, an optical signal is drawn into a case body, and a drawn-side optical fiber connected to a communication device (for example, a media converter) is connected to the drawn optical fiber. It is provided with O / E conversion means that accommodates the extra length of the optical fiber after connection and converts the optical signal into an electrical signal that can be received by a television receiver or the like. It is installed and used.

Reference numeral 3 denotes a case body in the optical receiver, and reference numerals 2a and 2b denote wall surface attachment members formed integrally with the case body. Reference numeral 4 denotes a lid that is pivotally attached to the case body so as to be openable and closable, and is formed of, for example, a synthetic resin. Reference numeral 5 denotes a storage space for the case body. The optical receiver 13 and the optical fiber storage unit 24 for storing an extra length of optical fiber are arranged in this order from the back side of the storage space 5.
Reference numeral 6 denotes an entrance / exit of a known optical cable, which is integrally formed with an optical fiber housing portion 24 described later. Reference numerals 8 and 9 denote output terminal protrusions for taking out known television signals, which are formed integrally with the case body 3.
In the embodiment of the present application, the case body 3 and the lid body 4 are formed by molding a synthetic resin material. However, the present invention is not limited to this embodiment, and a metallic material such as an aluminum material is used. For example, the case main body 3 may be used in combination such as an aluminum material and the lid 4 may be a synthetic resin material.

The optical receiver 13 is unitized by a metal shield case 14 and is detachably fixed to the case body 3 by any means. The shield case 14 includes an O / E conversion means for converting an optical signal into an electrical signal, and an amplification circuit for amplifying the electrical signal (in other words, a high-frequency signal for a television receiver) to an appropriate level as necessary. Is provided on a circuit board 15 such as a printed circuit board to form an optical receiver 13. 16 is a TV signal output terminal, and 16a is a TV signal monitor terminal.
The optical receiver 13 has a display means 30 for displaying whether an optical signal is input (for example, an LED is turned on when the optical signal is input at an appropriate level), and an appropriate power supply voltage. Display means 31 for displaying whether or not it is supplied (for example, the LED is turned on when an appropriate voltage is input), switching means 32 for appropriately changing the output level of the optical receiver, and tilt characteristics in the output ON / OFF means 33 or the like for holding the shield case 14 is provided so that they can be operated from the outside of the case 14 of the optical receiver 13 using a fingertip (that is, an opening). The display / operation unit 34 is provided in a centralized manner.

Further, an optical adapter 20 is detachably fixed to the front side of the shield case 14. The optical adapter 20 is connected to an optical connector 21a on the tip end side, and an optical fiber 17 connected to the O / E conversion means in the shield case 14 through a through hole 14a provided on the shield case 14 on the other end side. It is removably connected.

Next, the optical fiber housing portion 24 will be described. The optical fiber housing portion 24 includes a substrate 25 and winding frames 26 and 27. The substrate 25 is formed of a hard plate material such as a metallic material or a synthetic resin. After the optical receiver 13 is attached to the storage space 5 of the case body 3, the case body 3 or the shield case 14 is attached by any means. It is fixed detachably.
The reel 26.27 is an attachment for accommodating an extra length optical fiber. That is, when connecting the optical fiber 45 drawn into the case body 3 and the optical fiber 46 following the optical cable on the drawer side, it is necessary to connect the two using a special tool. Since it is necessary to connect the optical fiber 47 to which the optical connector 21b is attached to the optical fiber 44 drawn into the main body 3, the optical fibers 44, 45, 46, 47 after the coating of the optical cable is removed. The length of tens of centimeters is required. Therefore, it is necessary to accommodate the extra length of the optical fiber after the connection work between the two is completed. In this case, if the optical fiber is wound smaller than a certain curvature, the optical fiber may be broken. Therefore, the optical fiber is wound with a curvature as small as possible with the curvature within the specified range to accommodate the extra length optical fiber. belongs to.

Since the optical fiber accommodating portion 13 of the embodiment of the present application is detachably fixed to the case body 4 or the shield case 14, when accommodating the optical fiber as described above, depending on the mounting location of the optical receiver 1, It is configured so that the optical fiber can be easily accommodated by removing the optical fiber accommodating portion 13 and accommodating the optical fiber. When the optical fiber is accommodated, in this embodiment, the optical fiber 47 is accommodated using the winding frame 27 and the winding frame 26, and the optical connector 21b provided on the free end side of the optical fiber 47 is accommodated. However, the optical cable is accommodated in consideration of the length of the optical cable so that it can be temporarily fixed to the optical connector temporary fixing tool 25d provided on the substrate 25. FIG. 5 shows a partially enlarged view of the embodiment of the optical connector temporary fastener 25d, and the arrows in the figure indicate the movement of the optical connector 21b and the direction of insertion into the optical adapter 20.

In the vicinity of the optical connector temporary stopper 25d, a part of the substrate 25 is provided to take in an optical signal in the optical receiver 13 in a place where it does not overlap with the accommodated extra length optical fiber. A missing portion 25 a is formed so that the optical adapter 20 is exposed to the opening side of the case body 3. In addition, since the optical adapter 20 is disposed so as to be almost the same height or slightly higher than the surface of the substrate 25 on the opening side when the optical fiber accommodating portion is accommodated in the case main body 3, as a result, The optical connector 21b temporarily fixed to the optical connector temporary fixing tool 25d and the optical adapter 20 come to almost oppose each other, and can be connected by a slight movement of the optical connector. In other words, the optical fiber is configured so as not to add unnecessary stress.

The reels 26 and 27 of the embodiment of the present application will be described in detail. A first winding frame 26 and a second winding frame 27 having peripheral walls 26a and 27a formed to have a small curvature within a range of a safety curvature that allows the optical fibers 44, 45, 46, and 47 to be attached. Further, the first winding frame and the second winding frame are close to each other so that the arcs of the first winding frame and the second winding frame overlap each other. At this time, notches 29 and 29 are provided in the peripheral walls 26a and 27a of the first winding frame 26 and the second winding frame 27 that overlap each other, and are provided with a space through which the optical fiber can pass. In order to allow the optical fiber to pass through, the first and second winding frames 26 and 27 are communicated with 29 and 29 and are formed with a small curvature within the range of the above-described safe curvature. A first passage 26b and a second passage 27b in the gap are provided.
According to this arrangement, the optical fiber drawn from the optical fiber entrance / exit 6 can be wound clockwise around the first reel while being wound clockwise around the second reel. Become. Further, by combining the first winding frame and the second winding frame and winding them in the clockwise direction, fine adjustment in accommodating the extra length optical fiber is possible.

Furthermore, at the intermediate position of the second winding frame, the start end for enabling the optical fiber drawn from the optical fiber doorway to be wound counterclockwise around the second winding frame and the first winding frame. In order to allow passage through the optical fiber, a third passage 27c having a gap formed with a small curvature within the range of the safe curvature is provided.
According to this arrangement, the optical fiber drawn from the optical fiber entrance / exit can be wound counterclockwise around the first winding frame through the third passage. Further, by combining the first winding frame and the second winding frame and winding them counterclockwise, fine adjustment can be made in accommodating the extra length optical fiber.
The peripheral walls 26a and 27a of the winding frame may be formed integrally with the substrate 25 or may be formed separately when the substrate 25 is formed of synthetic resin. In addition, the upper and lower positions of the peripheral walls 26a and 27a and the positions away from the outer periphery of the peripheral walls are respectively formed with appropriate stopper claws 28 for preventing the optical fibers from jumping up and arranged appropriately. Is stably housed.
Although the first reel 26 and the second reel 27 of the present application are juxtaposed so as to overlap each other, they may be juxtaposed so as not to overlap each other. It may be an oval formed with a small curvature within the range of the safe curvature that allows attachment.
The outer peripheral wall 50 is for restricting the outer peripheral position of the optical fiber that allows the optical fiber to be arranged with a large curvature at a distance from the peripheral walls 26a and 27a of the winding frames 26 and 27. If the nail | claw 28 is arrange | positioned suitably, it may not be.

The inside of the peripheral wall of the winding frame thus provided is a space where the optical fiber cannot be routed. Therefore, the optical fiber housing is miniaturized as much as possible, and a through hole is formed in the space to penetrate the substrate, and the operation of the optical receiver is confirmed and controlled from the front side of the case body through the through hole. It is what I did.

Examples of the present application will be described. A through hole 25b penetrating the substrate 25 is provided in a range surrounded by the inner periphery of the peripheral wall 26a and the outer periphery of the first passage 26b in the first winding frame 26. In addition, although the shape of the through hole of this application forms the through hole of the shape enclosed by the peripheral wall of the 1st winding frame 26 and the outer peripheral wall of the 2nd channel | path 26b, the shape of a through hole is in an Example. It is not limited. In the optical receiver 1 of the present application, the through hole 25b and the display / operation unit 34 of the optical receiver 13 are disposed so as to oppose each other, and are provided on one side of the optical receiver 13. Further, display means 30 for displaying whether or not an optical signal is input, display means 31 for displaying whether or not an appropriate power supply voltage is supplied, and switching means 32 for appropriately changing the output level of the optical receiver 1 The display / operation unit 34 in which the operation means such as the switching means 33 for giving the output signal tilt characteristics is concentrated without touching the extra length optical fiber housed in the optical fiber housing section 24. 3 can be operated from the front side.

In other words, when the optical fiber is accommodated, the optical fiber is not caught by an operation part such as an operation means, so that the optical fiber can be accommodated without damaging it. In addition, since the display / operation unit 34 of the optical receiver 1 is disposed so as to oppose the through hole 26b provided on the center position side of the winding frame 26, the optical fiber housing unit 24 is effectively used. As a result, the occupied area can be reduced, and the case of the optical receiver 1 can be downsized.

Furthermore, since the display / operation unit 34 is disposed so as not to protrude from the upper end of the peripheral wall 26a of the optical fiber housing 24, the display / operation unit 34 is surrounded by the peripheral wall 26a of the reel 26. In the range that does not affect the operation, it will be arranged in the depth direction of the case body 3, and the operation part touches the optical fiber and damages the optical fiber, or the fingertip or the optical fiber touches and operates. There is no need to be careful of erroneous operations such as switching means, and there is no need to prepare a special tool, and the operation parts of the operation means 32 and 33 are directly connected from the outside of the case 14 of the light receiving part 13. You can operate it with your fingertips.

In this way, when the optical receiver 13 and the optical fiber accommodating part 24 that accommodates the extra length optical fiber are accommodated inside the case body 3, the optical fibers 44 and 45 are drawn by the optical cable 41, and the optical fiber accommodating part is accommodated. After the optical fiber is accommodated in the portion 24, the case body 3 is covered with the lid 4 and attached to the storage box provided on the wall surface of the building or the apartment 54 with the wall surface mounting members 2a and 2b. is there. Next, for example, a media converter 50 and a personal computer 51 are connected to the optical cable 42 drawn out from the entrance / exit of the optical cable so that an optical signal can be used. Further, a set top box 52 and a television receiver 53 are connected to the coaxial cable 40 drawn from the output terminal 16 of the output terminal projection 9 and can be used.

In the embodiment of the present application, the display means 30, 31 and the operation means 32, 33 are concentrated on one side of the case 14 of the optical receiver 13 as the display / operation section 34, and the display / operation section 34 is the first display / operation section 34. In the above example, the display means 30 and 31 and the operation means 32 and 33 are appropriately arranged depending on the circuit configuration of the optical receiver 13. For example, as shown in FIG. 3, the operating means 32 and 33 are provided in the through hole 25b of the first reel 26 and the through hole 25c provided at the intermediate position of the second reel is displayed. You may comprise so that confirmation and operation can be performed from the front side of case main body 3 by making means 30 and 31 mutually oppose. In addition, the display for identifying the display means and the operation means may be displayed with a label attached to the case of the optical receiver, or may be displayed integrally with the board on the upper surface of the board. May be.
The operation means and display means shown in the present application are examples, and are not limited to these embodiments. Functions different from the above functions may be added as necessary, and these functions may be added. You may use it combining suitably.
It should be noted that the present invention is not limited to the above-described embodiment, and can be implemented by appropriately changing the structure and arrangement of each part without departing from the spirit of the present invention.

With the above configuration, the installation area in the house is small, and it can be used not only for optical receivers that do not choose an installation location but also for optical equipment.

It is a perspective view which shows the Example of the optical receiver which concerns on invention of this application. It is the figure seen from the front side of the optical receiver (the cover is omitted) of the present application. FIG. 3 is a partial cross-sectional view taken along line AA in FIG. 2. It is a figure which shows another Example. It is the elements on larger scale near the optical adapter and the optical connector temporary fastener. It is a schematic system diagram using the optical receiver of the present application. It is a side view when the optical receiver of this application is attached to the wall surface.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Optical receiver, 2a, 2b ... Wall surface mounting member, 3 ... Case main body, 4 ... Cover body, 5 ... Storage space, 6 ... Optical cable inlet / outlet, 8 ... Television output terminal protrusion, 9 ... Television output terminal protrusion, DESCRIPTION OF SYMBOLS 13 ... Optical receiving part, 14 ... Case (shield case), 14a ... Through-hole, 15 ... Circuit board, 16 ... Output terminal, 16a ... Output level monitor terminal, 17 ... Optical fiber, 20 ... Optical adapter, 21 ... Optical connector 24 ... Optical fiber housing part, 25 ... Substrate, 25a ... Missing part, 25b ... Through hole, 25c ... Through hole, 25d ... Optical connector temporary fastener, 26 ... First winding frame, 26a ... Peripheral wall, 26b ... First 1 passage, 27 ... second winding frame, 27a ... peripheral wall, 27b ... second passage, 27c ... third passage, 28 ... jumping claw, 29 ... notch, 30 ... light signal display means (LED ), 31 ... Power supply display means (LED), 32 ... Output Bell switching means (switch), 33 ... Tilt ON / OFF means (switch), 34 ... Display / operation unit, 40 ... Coaxial cable, 41 ... 2-core optical cable, 42 ... Optical cable, 44 to 47 ... Optical fiber, 50 ... Outer wall

Claims (2)

An optical receiving unit that receives light from the optical fiber by connecting an optical fiber drawn from the outside through an optical adapter ;
An optical fiber drawn from outside has a winding frame that can be wound with a curvature within a specified range, and the optical fiber is wound around the winding frame so that the end side of the optical fiber is connected to the optical adapter in the optical receiving unit. in the optical receiver and the optical fiber accommodating portion capable of reaching, it was housed in the electronic device case in connectable orientation as,
The above electronic equipment case
It consists of a case body with the front surface open and a lid that covers the open part of the case body, and a wall mounting member is provided on the back side of the case body.
The optical receiver is
Are unitized case having a shielding effect, the front of the case, the display means from the outside of the case can be confirmed in the operation state of the light receiving unit, and controls the light reception portion from the outside of the case A display / operation unit provided with an operation means for receiving an operation for
The optical fiber housing is
A board and at least one reel that is provided in the front direction of the board and allows an optical fiber to be attached within the range of the safety curvature. At least one of the reels includes a peripheral wall of the reel In a region surrounded by a through hole penetrating the substrate,
The optical receiver and the optical fiber housing are:
The optical fiber housing part is housed in the case body so that it is on the open side of the case body with respect to the light receiving part
The above display / operation section
An optical receiver characterized in that the optical receiver can be confirmed and operated from the front side of the case body by being disposed so as to oppose at least one through hole provided in the optical fiber housing portion. The display / operation unit of the optical receiver is
The optical receiver according to claim 1, wherein the optical receiver is disposed so as not to protrude from a front side end portion of the winding frame of the optical fiber housing portion.

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