JP5878814B2 - Optical receiver - Google Patents

Description

  The present invention relates to an optical receiver.

  An optical receiver (FTTH terminal) is known as a device for drawing an optical fiber from the outside indoors (see, for example, Patent Document 1). In this optical receiver, an optical signal input through a broadcast optical fiber is converted into an electric signal by an optical reception amplification unit, amplified, and output.

  When such an optical receiver 101 is installed, normally, as shown in FIG. 19A, the power cord 102a of the built-in power supply unit 102 (see FIG. 19B) is connected to a power outlet (see FIG. 19). (Not shown), an optical signal is input through an optical cable 103 (optical fiber cable), and a television broadcast signal is output through a coaxial cable 104.

  However, when the optical receiver is actually installed at the installation location, depending on the setting location, there is no power outlet near the installation location. For example, as shown in FIG. The power supply unit 102 is placed in a place where the power cord 102a can be connected to an indoor power outlet (not shown), while the power supply unit 102 and the optical reception amplification unit (not shown) in the main body casing 101A are disposed. In some cases, a coaxial cable 104 is used to supply power via the coaxial cable 104, and a television broadcast signal is supplied from the power supply unit 102 to another television cable or the like through another coaxial cable 105.

  In such a case, it is necessary to open the opening of the main body casing 101A and take out the power supply unit 102, but since a fiber tray (not shown) is detachably fitted into the opening of the main body casing 101A, The fiber tray was completely removed from the main body casing 101A, and the operator had to hold the fiber tray to remove the power supply unit 102, so that workability was poor. In particular, since such an optical receiver 101 is usually installed at a high place and needs to work on a stepladder or the like, it is desired that the power supply unit 102 can be easily taken out. .

  By the way, what attached the optical fiber storage case to the box so that rotation was possible is known (for example, refer patent document 2).

JP 2006-119238 A JP 2007-047330 A

  The optical fiber storage case described in Patent Document 2 is such that the portion in which the optical fiber is stored is positioned toward the inside of the box, and the display plate in the box is used as a case cover. The basic structure is different from the optical receiver having a structure in which the wound portion is provided toward the outside of the main body casing, and cannot be applied as it is.

  That is, the technique described in Patent Document 2 discloses that the optical fiber is easily stored by winding the optical fiber in a state where the rotation axis of the fiber storage case is horizontal and rotated downward to be opened. Just do it.

  An object of the present invention is to provide an optical receiver capable of easily taking out a power supply unit from a main casing.

The invention according to claim 1 includes a main body casing having an opening portion with one side open, and a casing cover that is provided in the main body casing so as to be rotatable about a first rotation axis and closes the opening portion so as to be openable and closable. A power supply unit and an optical receiving amplification unit for converting an optical signal into an electric signal and amplifying the inside of the main casing, and a fiber tray having substantially the same size as the opening is provided on the one surface side, An optical receiver in which an extra length portion of an optical fiber is wound around and stored in a fiber tray, and an optical connector at an end of the optical fiber is connected to an optical relay adapter of the optical reception amplification unit through an opening of the fiber tray. in the fiber tray, rotatably attached to the second rotational axis perpendicular to the first rotation shaft to the main body casing, the second time Is configured to open and close the opening by rotating around the axis, with open said fiber tray is at least one of the power supply unit or the light receiving amplifying unit removable from the main body casing, the Between the fiber tray and the main body casing, holding means for elastically holding the open state of the fiber tray is provided, and the holding means is coupled to the outer side of the fiber tray with a base end portion coupled to the fiber tray. When an elastic piece provided to extend in parallel with the outer side of the tray, a protrusion provided on the elastic piece, and an inner surface side of the main body casing and the fiber opens the opening, The projecting portion is detachably engaged and includes a recess that elastically holds the open state of the fiber tray .

In this way, since the fiber tray is rotatably attached to the main body casing, when taking out the power supply unit or the optical receiving amplification unit from the main body casing, the operator can work while holding the fiber tray with one hand. There is no need to carry out, and the work of taking out the power supply unit or the optical reception amplification unit can be easily performed.

Moreover, since the open state of the fiber tray is elastically held by the holding means, it becomes easier to take out the power supply unit or the optical reception amplification unit .

The fiber tray according to claim 2 , wherein the fiber tray has an introduction portion of the optical fiber on the side where the fiber tray is rotatably attached, on the side opposite to the side where the fiber tray is rotatably attached. The fiber tray and the main body casing may be provided with a locking means for releasably locking the fiber tray to the main body casing.

  In this way, the fiber tray is securely held by the main body casing by the locking means, and the fiber tray does not rotate carelessly when the case cover is opened.

In this case, as described in claim 3 , it is desirable that the fiber tray has a knob portion for rotating the fiber tray in a direction to release the locking by the locking means.

  If it does in this way, the latch release by a latching means can be easily performed by using a knob part.

According to a fourth aspect of the present invention, the cable introducing portion includes a plurality of sandwiching portions that sandwich the inserted optical cable with a plurality of plate-shaped portions, and an engagement recess formed between the adjacent sandwiching portions. The cover is covered with a cover, and the cover is pressed against an engagement protrusion that is detachably engaged with the engagement recess, and an optical cable that is engaged with and held by the holding portion. It is desirable that a pressing portion is formed.

  If it does in this way, the introduction part of an optical cable can be certainly held by a lid member. Further, since the sandwiching portion is composed of a plurality of plate-like portions, it is advantageous in preventing water from entering from the cable introduction portion even when the optical cable is not sandwiched.

In the present invention, the fiber tray is rotatably attached to the main body casing, and the holding means for elastically holding the open state of the fiber tray is provided between the fiber tray and the main body casing. When taking out the power supply unit or the optical reception amplification unit from the inside, it is not necessary for the operator to work while holding the fiber tray by hand, and the operation for taking out the power supply unit or the optical reception amplification unit can be easily performed. .

It is the perspective view which looked at the optical receiver which concerns on embodiment of this invention from the downward direction. It is a perspective view which shows the state which opened the casing cover in the said optical receiver. (A) and (b) are the front view and right view which show the state which opened the casing cover in the said optical receiver, respectively. It is a perspective view which shows the state which opened the fiber tray further in the state which opened the casing cover in the said optical receiver. (A) (b) (c) is sectional drawing in the AA in FIG. 3 (a), a BB line, and CC line, respectively. (A) (b) is the front view and right view which show the state which opened the casing cover and the fiber tray in the said optical receiver, respectively, (c) is sectional drawing in the DD line | wire of Fig.6 (a). . It is a front view of the fiber tray. It is detail drawing of a cable introduction part. It is a perspective view which shows the state which opened the cover part of the said cable introduction part. It is a top view of the said fiber tray. The structure which supports the upper part of the said fiber tray rotatably is shown, (a) is a principal part perspective view of a fiber tray, (b) is a principal part perspective view of a main body casing. (A) (b) is the bottom view of the said fiber tray, and the perspective view seen from the bottom face, respectively. It is a perspective view of a main body casing. The closed state of the fiber tray is shown with the case cover omitted, wherein (a) is a plan view, (b) is a cross-sectional view taken along line EE of FIG. 14 (a), and (c) is FIG. 14 (a). FIG. 14D is a cross-sectional view taken along the line FF of FIG. 14D, and FIG. The open state of the fiber tray is shown with the case cover omitted, (a) is a plan view, (b) is a cross-sectional view taken along the line H-H in FIG. 15 (a), and (c) is FIG. 15 (a). FIG. 15D is a cross-sectional view taken along the line II of FIG. 15D, and FIG. In the structure for rotatably supporting the upper portion of the fiber tray, the relationship between the rotating shaft portion on the fiber tray side, the protrusion and the support hole on the main body casing side, and the concave portion is shown, (a) is the IX portion in FIG. FIG. 14B is an enlarged view of a portion I in FIG. 14B, FIG. 14C is an enlarged view of a portion V in FIG. 14C, and FIG. 10D is an enlarged view of a portion VII in FIG. FIG. 4E is an enlarged view of a portion III in FIG. In the structure for rotatably supporting the lower portion of the fiber tray, the relationship between the engaging portion on the fiber tray side and the fixed shaft portion on the main body casing side is shown, (a) is an enlarged view of the IV portion in FIG. (B) is an enlarged view of the II part of FIG.14 (d), (c) is an enlarged view of the VIII part of FIG.15 (d), (d) is an enlarged view of the VI part of FIG.15 (b). The modification of the structure which supports the upper part of the said fiber tray rotatably is shown, (a) is a principal part perspective view of a fiber tray, (b) is a principal part perspective view of a main body casing. (A) (b) is explanatory drawing of the use condition of each optical receiver.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, as shown in FIGS. 1 to 3, in the optical receiver 1, the side where the casing cover 4 is provided is the front side, the side where the rotational axis S1 of the casing cover 4 is located is the upper side, and the fiber tray. The side on which the third rotation axis S2 is located is the left side.

  As shown in FIGS. 1 to 3, the optical receiver 1 is provided in a rectangular box-shaped main body casing 2 having an opening 2 a with one surface (front surface) opened, and a front surface of the main body casing 2. A fiber tray 3 and a casing cover 4 provided on the upper portion of the main body casing 2 so as to be rotatable about a horizontal rotation axis S1 (first rotation axis) and closing the opening 2a so as to be openable and closable.

  Inside the main casing 2, as shown in FIG. 4, a power supply unit 5 and an optical reception amplification unit 6 are provided vertically. The optical reception amplification unit 6 has an optical relay adapter 6a for receiving an optical signal in the optical reception amplification unit 6, and the optical relay adapter 6a is provided on the upper surface of the shield case 6b via a support member 6c. It is attached to make a certain angle. The optical signal input through the optical repeater adapter 6a is converted into an electric signal in the optical reception amplification unit 6 and amplified. This amplified electrical signal is output from the output terminal 8 provided on the lower surface of the shield case 6b. A monitor terminal 7 for monitoring an electric signal output from the output terminal 8 is provided in parallel with the output terminal 8 on the lower surface portion of the shield case 6b. The electrical signal is a television broadcast signal, and this electrical signal is supplied from the output terminal 8 to a television receiver or the like via a coaxial cable (not shown).

  On the lower surface of the main casing 2, insertion holes 2 b and 2 c are formed through which the monitor terminal 7 and the output terminal 8 respectively penetrate. A female screw portion 2d to which a screw 9 for fixing the casing cover 4 to the main casing 2 is screwed is provided on the lower surface portion side.

  The casing cover 4 can be opened and closed by rotating around the horizontal rotation axis S1, and the first holding means M1 is provided between the casing cover 4 and the main body casing 2 so as to hold them at an angle of approximately 90 °. It has been. As shown in FIG. 5A, the first holding means M <b> 1 is provided on the engaging edge 4 a of the casing cover 4 located on the side opposite to the side on which the screw 9 is provided, and on the back surface of the main body casing 2. The latching protrusion 4e is provided and the latching edge 4a is elastically engaged so that the latching edge 4a can be engaged and disengaged.

  The fiber tray 3 is attached to the main body casing 3 so as to be rotatable about a rotation axis S2 (second rotation axis) in the vertical direction. As shown in FIGS. 4 and 6A and 6B, the fiber tray 3 is rotated around the rotation axis S2. Is configured to open and close the opening 2a.

  The fiber tray 3 is substantially the same size as the opening 3a, and has an optical cable introduction part 3A into which an optical cable is introduced, as shown in FIG. 7, and communicates with the optical fiber of the broadcasting system of the introduced optical cable. The extra length portion of the system optical fiber is wound and stored. The fiber tray 3 is rotatably supported by the main body casing 2 on the side where the optical cable introducing portion 3A is present. The optical connector 11 a (see FIG. 5A) at the end of the broadcast optical fiber 11 is connected to the optical relay adapter 6 a of the optical reception amplification unit 6 through the opening 3 a of the fiber tray 3. Although the introduced optical cable is not specifically illustrated, for example, using a simple coding member that can easily connector-process only the tip portion of the fiber, the optical fiber for broadcasting and the optical fiber for communication are used. It is divided into.

  As shown in detail in FIGS. 8 and 9, the cable introduction portion 3 </ b> A is formed between a plurality of sandwiching portions 3 </ b> Aa that sandwich the optical cable to be inserted between the plurality of plate-like portions 3 </ b> Aaa and adjacent sandwiching portions 3 </ b> Aa. It has an engagement recess 3Ab, and is configured to be covered with a cover 3E integrally provided on the fiber tray 3 via a resin hinge 3F (elastic hinge). The lid 3E is formed with an engaging convex portion 3Ea that is detachably engaged with the engaging concave portion 3Ab, and a pressing portion 3Eb that presses the optical cable (not shown) that is engaged with and held by the holding portion 3Aa. Has been. An insertion portion 3G through which the power cord 5a extending from the power supply unit 5 to the outside is formed on the side opposite to the side where the optical cable introduction portion 3A is formed.

  The front portion of the fiber tray 3 is formed by combining a plate-like vertical rib protruding in a direction perpendicular to the vertical surface portion of the fiber tray 3 in addition to the cable introduction portion 3A into which the optical cable is introduced. And the second winding portion 3N are formed, and various passages are formed through which the extra length portion of the optical fiber is wound. Further, an eave-like horizontal rib 3f for preventing the optical fiber from separating (raising) from the portion through which the optical fiber passes is provided so as to protrude horizontally toward the passage.

  Between the first and second winding portions 3M and 3N, when an optical fiber is wound between them, the optical relay adapter 6a of the optical reception amplification unit 6 is connected to the broadcasting system at a position behind the optical fiber. The optical connector 11 a at the end of the optical fiber 11 is detachably connected through the opening 3 a of the fiber tray 3. The opening 3a is formed with a guide recess 3d that is inclined so that the height (at the bottom) gradually decreases toward the opening 3a (see FIG. 5A).

  Then, the structure which supports the fiber tray 3 rotatably is demonstrated.

  As shown in FIGS. 10 and 11A, the base end portion is coupled to the fiber tray 3 and the tip end portion is substantially in the form of a cantilever extending in parallel with the top surface of the fiber tray 3. An L-shaped elastic piece 3B is provided. The elastic piece 3B has a first portion 3Ba extending outward from the base end portion and a second portion 3Bb extending rearward from the tip portion of the first portion 3Ba, and the tip portion (rear side) of the first portion 3Ba. The rotation shaft portion 3Bc is provided on the end portion so as to protrude upward. The second portion 3Bb is formed with a linear protrusion 3Bd extending from the portion where the rotation shaft portion 3Bc is provided toward the tip. On the other hand, as shown in FIG. 11B, the main casing 2 is integrally formed with a protruding piece portion 2A corresponding to the elastic piece 3B, and the rotating shaft portion 3Bc is rotatable on the protruding piece portion 2A. A support hole 2 </ b> Aa to be inserted into is formed. Further, a groove-shaped first recess 2Ab extending in the front-rear direction from the support hole 2Aa and a groove-shaped second recess 2Ac extending in the left-right direction from the support hole 2Aa are formed on the inner surface side of the main casing 2. Thereby, when the fiber tray 3 is closing the opening 2a of the main body casing 2, the case cover 4 is omitted in FIGS. 14 (a) to 14 (d). That is, as shown in FIGS. 16C and 16E, the protrusion 3Bd can be engaged with and disengaged from the first recess 2Ab as shown in FIG. 16B in a state where the rotating shaft 3Bc is inserted into the support hole 2Aa. And the closed state of the fiber tray 3 is held elastically. On the other hand, when the fiber tray 3 opens the opening 2a, the case cover 4 is omitted in FIGS. 15 (a) to 15 (d). That is, as shown in FIG. 16A, the protrusion 3Bd is detachably engaged with the second recess 2Ac as shown in FIG. 16D in a state where the rotating shaft 3Bc is inserted into the support hole 2Aa as shown in FIG. In addition, the open state of the fiber tray 3 is held elastically.

  The projection 3Bd and the second recess 2Ac constitute second holding means M2 provided between the fiber tray 3 and the main casing 2 to hold the fiber tray 3 in an open state (FIG. 5C). And FIG. 6 (c)).

  Further, at the lower part of the fiber tray 3, as shown in FIGS. 12 (a) and 12 (b), an inverted U-shaped system that is rotatably engaged with a fixed shaft portion 2f (see FIG. 13) protruding from the main body casing 2 is used. An engaging portion 3C is formed. The engaging portion 3C is formed adjacent to the cable introducing portion 3A, and includes a notch groove portion 3Ca and a shaft support portion 3Cb that rotatably supports the fixed shaft portion 2f. The notch groove portion 3Ca is a portion into which a molding die (not shown) is inserted when the shaft support portion 3Cb is molded.

  Then, the elastic piece 3B is elastically deformed to insert the rotary shaft portion 3Bc into the support hole 2Aa, and the fiber tray 3 is moved rearward in this state, so that the fixed shaft portion 2f is rotatably supported by the shaft support portion 3Cb. Is done. FIGS. 17A and 17B show the state when the opening 2a of the main casing 2 is closed, and FIGS. 17C and 17B show the state when the fiber tray 3 opens the opening 2a. d) respectively.

  Further, a substantially U-shaped protruding edge portion 3D that is detachably engaged with an engaging recess portion 2D formed in a portion of the main casing 2 where the cable introduction portion 3A is disposed, following the engaging portion 3C. Is formed so as to protrude rearward. When the fiber tray 3 is in the closed state, the projecting edge portion 3D is detachably engaged with the engaging recess 2D.

  As described above, the fiber tray 3 is rotatably attached to the main body casing 2 using both shaft portions 3Bc and 2f in the upper and lower portions, and the fiber tray 3 is held in the open state. 4 is held in the open state by the first holding means M1, and then the fiber tray 3 is held in the open state by the second holding means M2, so that the fiber tray 3 can be removed from the main casing 2 without removing the fiber tray 3. 5 can be taken out from the body casing 2 without difficulty.

Furthermore, the fiber tray 3 is detachably locked to the main body casing 2 between the fiber tray 3 and the main body casing 2 on the side opposite to the side where the rotation is attached (the side where the cable introduction part 3A is present). Locking means M3 is provided. As shown in FIG. 5B, the locking means M3 is detachably engaged with the elastic engagement piece 3b protruding backward from the fiber tray 3 and the elastic engagement piece 3b protruding forward from the main body casing 2. engaged in an elastic engagement tabs 2g be locked by thus constituted. The portion of the fiber tray 3 where the locking means M3 is provided serves as a knob portion 3H for the operator to grip and rotate the fiber tray 3 in the direction to release the locking by the locking means M3. Yes.

  According to the above optical receiver, the optical connector 11a provided at the tip of the optical fiber 11 accommodated in the fiber tray 3 is detachably connected to the optical relay adapter 6a of the optical reception amplification unit 6, thereby optical reception amplification. An optical signal is introduced into the unit 6.

  Therefore, as described in the background section above, when the optical receiver 1 is actually installed at the installation location, if the power outlet is not near the installation location, the fiber tray 3 can be rotated to the main casing 2. Since it is attached, the casing cover 2 and the fiber tray 3 can be held in the open state by the first and second holding means, and the power supply unit can be easily taken out from the main body casing 2. As a result, the power supply unit 5 is arranged in a place where a power cord can be connected to an indoor power outlet (not shown), while the power supply unit 5 and the optical reception amplification unit 6 in the main body casing 2 are coaxially connected (not shown). 2) to supply electric power, and a TV broadcast signal can be supplied from the power supply unit 5 to a TV receiver or the like through a coaxial cable.

  In this case, when taking out the power supply unit 5 from the main body casing 2, it becomes unnecessary for the operator to work while holding the fiber tray 3 with one hand, and the work to take out the power supply unit 5 can be easily performed.

  Even when the power supply unit 5 or the optical reception amplification unit 6 needs to be replaced due to a failure or the like, the extra length of the optical fiber can be accommodated by removing the optical connector 11a from the optical relay adapter 6a. Since the fiber tray 3 can be rotated and held in the open state, the work for exchanging the power supply unit 5 and the optical reception amplification unit 6 can be easily performed without removing the fiber tray 3 from the main casing 2. Can do.

  In the above embodiment, in order to maintain the open state or the closed state of the fiber tray 3, the elastic engagement between the linear protrusion 3Bd and the recesses 2Ac, 2Ad is used. In addition to the elastic engagement, for example, as shown in FIG. 18, the open state or the closed state of the fiber tray 3 is maintained by the elastic engagement relationship between the mountain-shaped protrusion 3Bd ′ and the engagement holes 2Ab ′ and 2Ac ′. It is also possible to configure so as to.

DESCRIPTION OF SYMBOLS 1 Optical receiver 2 Main body casing 2A Protrusion piece part 2Aa Support hole 2Ab, 2Ab '1st recessed part 2Ac, 2Ac' 2nd recessed part 2D Engaging recessed part 2a Opening part 2b, 2c Insertion hole 2d Female thread part 2e Locking convex part 2f Fixing Shaft 2g Elastic engaged piece 3 Fiber tray 3A Cable introduction part 3Aa Nipping part 3Ab Engaging recess 3B Elastic piece 3Ba First part 3Bb Second part 3Bc Rotating shaft part 3Bd, 3Bd 'Protrusion part 3C Engaging part 3Ca Notch Groove part 3Cb Shaft support part 3D Projection edge part 3E Cover part 3Ea Engagement convex part 3Eb Holding part 3F Resin hinge 3G Insertion part 3H Knob part 3a Opening 3b Elastic engagement piece 4 Casing cover 4a Locking edge part 5 Power supply unit 6 Light reception Amplification unit 6a Optical relay adapter 6b Shield case 6c Support member 11 Optical fiber 11a Optical connectors S1, S2 Rotating shafts M1, M2 Lifting means M3 locking means

Claims (4)

A main body casing having an opening with one surface open; and a casing cover that is provided in the main body casing so as to be rotatable about a first rotation axis and closes the opening so as to be openable and closable. A power supply unit and a light receiving and amplifying unit for converting an optical signal into an electric signal and amplifying the optical signal, and a fiber tray having substantially the same size as the opening is provided on the one surface side. In the optical receiver in which the long portion is wound and stored, and the optical connector at the end of the optical fiber is connected to the optical repeater adapter of the optical reception amplification unit through the opening of the fiber tray,
The fiber tray is attached to the main body casing so as to be rotatable around a second rotation axis orthogonal to the first rotation axis, and is configured to open and close the opening by rotating around the second rotation axis.
With open said fiber tray is at least one of the power supply unit or the light receiving amplifying unit removable from the main body casing,
Between the fiber tray and the main body casing, a holding means for elastically holding the open state of the fiber tray is provided,
The holding means is
An elastic piece provided at a base end portion coupled to an outer portion of the fiber tray and extending in parallel with the outer portion of the fiber tray;
A protrusion provided on the elastic piece;
A recess formed on the inner surface side of the main body casing, wherein the protrusion is detachably engaged when the fiber opens the opening, and elastically holds the open state of the fiber tray. An optical receiver characterized by that. The fiber tray has the optical fiber introduction portion on the side that is rotatably attached, while the fiber tray and the body casing are opposite to the side that is rotatably attached. The optical receiver according to claim 1 , wherein a locking means for removably locking the fiber tray to the main casing is provided therebetween. The optical receiver according to claim 2 , wherein the fiber tray has a knob portion for rotating the fiber tray in a direction to release the locking by the locking means. The introduction portion has a plurality of sandwiching portions for sandwiching an optical fiber to be inserted by a plurality of plate-like portions, and an engaging recess formed between the adjacent sandwiching portions, and is covered with a lid portion. And
The engagement convex portion that is detachably engaged with the engagement concave portion and the pressing portion that presses the optical fiber that is engaged with and held by the holding portion are formed on the lid portion. The optical receiver according to 2 or 3 .

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