JP7176894B2 - Optical receiver tray - Google Patents

Description

The present invention relates to an optical receiver tray having an optical fiber introduction section.

FTTH terminals, ONUs, etc. are known as optical receivers for CATV systems (for example, Patent Documents 1 to 3). An optical receiver converts an optical signal input from an optical fiber into an electrical signal, amplifies it, and outputs it.

An optical receiver usually consists of a case body, a lid that opens and closes the opening of the case body, and a tray that is installed in the case body. is wired. The tray has an optical fiber introduction section for drawing in and holding an optical fiber from the outside. There are various structures for the optical fiber introduction part (Patent Documents 1 to 3). In any structure, it is desired that the optical fiber introduced from the outside can be reliably held.

JP 2013-225006 A JP 2015-122454 A JP 2017-223723 A

SUMMARY OF THE INVENTION It is an object of the present invention to provide an optical receiver tray having an optical fiber introduction section that facilitates setting of an optical fiber introduced from the outside and that can reliably hold the set optical fiber.

The optical receiver tray of the present invention includes a box-shaped case body having an opening on one side, a lid connected to the case body so as to be openable and closable, and a tray that can be installed in the case body. The tray of the optical receiver case capable of closing the opening by covering the tray, the tray being integrally resin-molded with an optical fiber introducing portion. The optical fiber introduction part has a passage for wiring the optical fiber, the entrance of the passage opens to the outer surface of the tray, and the exit opens to the inside of the tray. The passage is between a plurality of holding pieces arranged in two rows facing each other. The holding pieces are arranged to face each other from the entrance side to the exit side of the passage, and the two rows of holding pieces face each other directly or obliquely. Each holding piece has a recess and a sharp tip projection at the tip, and the tip projection protrudes from at least both sides of the recess in the width direction to the tip of the recess. A pressing piece is connected to the optical fiber introducing portion so as to be openable and closable, and the pressing piece covers the optical fiber introducing portion in the closed state.

The present invention has the following effects.
(1) Since the distal ends of the plurality of holding pieces of the optical fiber introduction section have tip protrusions, the optical fiber introduced into the passage of the optical fiber introduction section is reliably held between the protrusions and may slip in the passage. It becomes difficult to shift the position. Also, the coating of the optical fiber is less likely to be damaged.
(2) When the holding pieces obliquely face each other, it becomes easy to push the optical fiber into the passage between the holding pieces. In addition, it is possible to cope with different diameters of optical fibers.
(3) When the holding pieces face each other directly, the optical fiber pushed into the passage is held more easily and firmly than when they face each other obliquely.

FIG. 2 is a perspective view of an optical receiver case; 1 is a perspective view of an optical receiver tray according to the present invention; FIG. (a) is a plan view of the optical receiver tray of the present invention in which the holding pieces of the optical fiber introduction portion are obliquely opposed; (b) is the optical fiber introduction portion of the optical receiver tray of the present invention; is a plan view of a state in which the holding pieces of are directly opposed to each other. (a) is an explanatory view showing an example of an open state of the pressing piece of the optical fiber introduction portion in the optical receiver tray of the present invention, and (b) is the pressing piece of the optical fiber introduction portion of the optical receiver tray of the present invention. is an explanatory view of the closed state, and (c) is an explanatory view showing another example of the open state of the pressing piece of the optical fiber introduction portion in the optical receiver tray of the present invention.

An embodiment of the present invention will be described with reference to the drawings. The housing 2 of the optical receiver includes a case body 3 , a lid 4 attached to the case body 3 so as to be openable and closable in the direction of the arrow, and a tray 5 installed inside the case body 3 .

The basic structure of the case body 3 (FIG. 1) is the same as that of a general-purpose optical receiver. , an optical receiving/amplifying unit, an optical relay adapter, and other devices (none of which are shown) can be incorporated. The peripheral wall of the case main body 3 is provided with structures necessary for the case main body, such as a power cord insertion hole and a plug mounting hole.

The basic structure of the lid 4 is similar to that of a general-purpose optical receiver, and is attached to the case body 3 so as to be openable and closable in the directions of arrows XY in FIG.

The basic structure of the tray 5 (FIG. 2) is similar to that of a general-purpose optical receiver tray. A stopper piece 7 is provided near the guide projection 6. - 特許庁The guide protrusion 6 guides the excess length of the optical fiber F to be wired, and the stop piece 7 prevents the excess length of the optical fiber F wired along the guide protrusion 6 from jumping up.

The illustrated tray 5 is separated from the case main body 3 so that it can be removed from the opening 10 of the case main body 3, but it can also be attached to the case main body 3 so as not to be separated. In this case, it may be attached to the case body 3 so as to be openable and closable so that the opening 10 of the case body 3 can be opened and closed.

An optical fiber introduction part 11 is provided inside one corner of the tray 5 . The optical fiber introduction part 11 is resin-molded integrally with the tray 5 . Two optical fiber introduction portions 11 are arranged in parallel, and two optical fibers introduced into the tray 5 from the outside of the tray 5, for example, an optical fiber for broadcasting and an optical fiber for communication, can be separately held. It is

The optical fiber introduction part 11 has a passage 12 into which an optical fiber can be pushed. The passage 12 has an entrance 13 that penetrates the outer surface of the tray 5, an exit 14 that opens into the tray 5, and an upper surface that opens into the tray 5. It has an opening, and the optical fiber F can be pushed through the opening.

The optical fiber introduction part 11 has a plurality of holding pieces 15 arranged in two rows from the entrance 13 side to the exit 14 side, and the two rows of holding pieces 15 face each other obliquely (FIG. 3(a)). Or, they face each other directly (FIG. 3(b)). Each holding piece 15 has a recess 16 and a sharp tip projection 17 . The tip protrusions 17 protrude from both sides in the width direction of the recess 16 to a point beyond the recess 16 . Although the illustrated recess 16 is arc-shaped (U-shaped), the recess 16 can be formed in various shapes such as V-shape and W-shape. The number of tip protrusions 17 may also be three or more instead of two. By providing the concave portion 16 and narrowing the tip projection 17, the tip projection 17 is given elasticity in the lateral direction (in the direction of the entrance side and the exit side of the passage 12) , and when the optical fiber F is pushed into the passage 12, the tip projection 17 is elastic in the lateral direction. After being pushed in, the optical fiber F is securely held by the restoration (return) of the tip protrusion 17 that was deformed in the lateral direction at the time of pushing in, and the optical fiber F in the passage 12 slips. It is designed to make it difficult to move or shift the position. Although the plurality of holding pieces 15 shown have the same shape, the holding pieces 15 may have different shapes.

A pressing piece 18 is continuous with the optical fiber introduction portion 11, and can be opened and closed from a hinge 19 on the left side of the tray 5. In an open state projecting outside the tray 5 (from FIG. 4(a), the tray 5 and can be opened and closed to a closed state (FIG. 4(b)) overlapping the upper surface of the optical fiber introduction portion 11. The holding piece 18 has an engaging portion 20, and the holding piece 18 is the optical fiber introduction portion. 11 (FIG. 4(b)), the optical fiber F in the passage 12 protrudes upward from the passage 12. Although the inner surface of the pressing piece 18 may be flat, it is also possible to provide both or one of vertical projections 21 and horizontal projections 22 as shown in FIG. The vertical projections 21 reliably hold down the optical fiber F. The horizontal projections 22 prevent the holding piece 18 from shifting laterally.The vertical projections 21 and the horizontal projections 22 may be projections of other shapes.

The diagrams attached to this document do not show the optical components and the wiring between optical components necessary for an optical receiver in case body 3 and tray 5. It will be equipped with the necessary optical parts.

2 Housing 3 Case Body 4 Lid 5 Tray 6 Guide Protrusion 7 Stopping Piece 10 Opening (of Case Body) 11 Optical Fiber Introduction Portion 12 Passage 13 Entrance (of Optical Fiber Introduction Portion) 14 Exit (of Optical Fiber Introduction Portion) 15 Holding piece 16 Recess 17 Tip projection 18 Pressing piece 19 Hinge 20 Locking portion (of pressing piece) 21 Vertical projection 22 Horizontal projection 23 Receiving portion F Optical fiber

Claims (6)

In the tray that can be installed in the case body of the optical receiver case,
The tray has an optical fiber introduction part, and the optical fiber introduction part is integrally molded with the tray,
The optical fiber introduction part has a passage into which the optical fiber can be pushed, the entrance of the passage opens through the outer surface of the tray, and the exit of the passage opens into the tray,
There are a plurality of holding pieces on both sides in the width direction of the passage, and the plurality of holding pieces on each side are formed in a row between the entrance side and the exit side of the passage,
Each holding piece has a recess and a tip projection projecting forward beyond the recess, and the recess and the tip projection protrude inside the passage,
The end projections of the holding pieces in the rows on both sides are arranged facing each other directly or obliquely,
The tip projections have elasticity that allows deformation in the lateral direction of the passage, and when pushed by the optical fiber pushed into the passage, the tip projections of the plurality of holding pieces are deformed in the lateral direction, making it easier to push the optical fiber. The optical fiber can be held by the restoring force of the deformed tip projection,
An optical receiver tray characterized by: The optical receiver tray according to claim 1,
There are two or more tip projections in the width direction of the recess,
An optical receiver tray characterized by: In the optical receiver tray according to claim 1 or claim 2,
The tip protrusion is tapered from the concave side to the tip side and has elasticity.
An optical receiver tray characterized by: In the optical receiver tray according to any one of claims 1 to 3 ,
A pressing piece is connected to the optical fiber introduction part, and the pressing piece can be opened and closed from an open state in which it protrudes outside the tray to a closed state in which it folds back to the inside of the tray and overlaps the optical fiber introduction part.
An optical receiver tray characterized by: The optical receiver tray according to claim 4,
The holding piece is engaged with the receiving portion of the case body in which the tray is installed in a state where the holding piece overlaps the optical fiber introduction portion, thereby preventing the optical fiber in the passage from protruding upward from the passage. made it possible to prevent
An optical receiver tray characterized by: In the optical receiver tray according to claim 4 or 5 ,
The inner surface of the pressing piece that covers the optical fiber introduction part is flat or has a protrusion,
An optical receiver tray characterized by:

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