JP2988203B2 - Optical cable connection structure for subscriber terminal equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical cable connection structure for a subscriber terminal installed in a subscriber area of a telephone company.

[0002] In recent years, terminal equipment required in the subscriber market of a telephone company is to provide a broadband service including image information and to reduce maintenance costs. It is getting.

[0003]

2. Description of the Related Art FIG. 3 shows a conventional optical cable connection structure, in which (a) shows a rear connector connection system and (b) shows a front connector connection system.

In a conventional subscriber area of a telephone company, a telephone exchange, a telephone office, a facsimile, a data terminal device, and the like are directly connected to the subscriber's telephone line by a copper cored cable. Wiring connection work could be done.

However, in response to the broadband service, an optical cable using an optical fiber as a core wire is laid between the exchange and the subscriber instead of a copper core wire cable. As optical transmission circuits for performing optical-to-electrical signal conversion are generally prepared outdoors, it becomes necessary for maintenance personnel to have optical fiber connection technology.

[0006] However, it is not easy in terms of skill and management to make the operator learn the optical fiber connection technology or hire a new maintenance person having the optical fiber connection technology. To avoid this, a one-touch connection structure using an optical fiber optical connector is required so that a maintenance person can handle the optical fiber as a conventional cable without any trouble.

The conventional optical cable connection structure is shown in FIG.
As shown in the side sectional view of the device, circuit packages 18 and 19 in which the outer shape for mounting the optical module 12 for light-to-electric conversion are standardized are stored in the shelves 2 housed in housings 38 and 39 installed outdoors. Insert from the front, upper and lower rail-shaped guide member 26
And the electrical connection is established by fitting into the connector 21 disposed on the back board 27 made of a printed wiring board on the rear surface.

The input / output of the optical fiber is led out from the optical module 12 by the optical fiber cord 14, and the optical connector 1
6 and 17 are provided, and in FIG.
This is a rear connector connection system that is arranged at the rear edge of the rear connector and is plugged in together with an electrical connector. In FIG. 2B, the optical connector 17 is fixed obliquely downward to the front of the circuit package 19, and the circuit package is mounted on the shelf 2.
19 is a front connector connection method in which a connector is connected to the optical fiber cord 32 of the optical cable 31 introduced from the outside at the front after the 19 is mounted.

[0009]

However, in the rear connector connection method shown in FIG. 3A, the mounting direction of the circuit package 18 and the fitting direction of the connectors 16 and 21 need to be matched. Since the allowable bending diameter of the fiber is required to be one order of magnitude larger than that of the copper wire, a large dimension behind the back board 27 of the shelf 2 is required to connect the optical fiber cable 32 of the optical cable 31 introduced into the housing 38 with the connector. Is required, and the depth dimension of the housing 38 is unnecessarily increased. 3 (b) requires a sufficient space at the front of the circuit package 19 to securely connect the optical connector 34 at the end of the optical fiber cord 32 to the optical connector 17. In addition, it is necessary to give sufficient consideration to the bent shape of the optical fiber cord 32, and the depth of the housing 39 is unnecessarily large. As described above, when the enclosures 38 and 39 are enlarged, especially when installed outdoors, an enlargement of the site, a large diameter of the telephone pole, and an enlargement of the underground hall are required. And so on.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide an optical cable connection structure of a connector connection subscriber terminal device which minimizes the space for optical fiber connection without waste.

[0011]

The object of the present invention is to provide, as shown in the principle explanatory diagram of FIG. 1, [1] a combination of a plurality of circuit packages 1 in which various circuits of a subscriber terminal are formed on a printed circuit board 11; This is inserted into the shelf 2 provided in the housing 3 from the front, and the connector on the rear
A subscriber terminal device 4 which is plug-in connected to and mounted side by side with a circuit package 1 and has a built-in optical module 12 for optical-electrical conversion. The optical fiber cord 32 pulled out by the optical fiber cord 14 provided with the optical fiber cord 32 and separated from the optical cable 31 introduced from the outside has an extra length accommodation portion 71 and the optical fiber cord.
14 and a connection section 72 for connector connection
The circuit package 1 or the plate 2 is held by a plate-shaped rotation support member 7 pivotally supported at the front of the adjacent side surface of the shelf 2 so that the surface is parallel to the surface 11 and is exposed forward. Alternatively, an urging means for urging the circuit package 1 to retract the rotation support member 7 backward and retract into the recessed portion 22 and a releasable lock for locking at a predetermined position where the rotation support member 7 is rotationally exposed forward against the urging. The present invention is achieved by an optical cable connection structure for a subscriber terminal device according to the present invention, comprising a locking means. [2] Here, the urging means is connected to a rear portion of the rotation support member 7,
The present invention is also solved by the optical cable connection structure of the subscriber terminal device of the present invention, in which a tension spring 73 is stretched on the circuit package 1 or the rear portion of the shelf 2. [3] Further, the lock means is provided at a predetermined position of the rotation support member 7 with a rotatable lock knob 75 having a tongue-shaped projection 76 provided on the front surface of the circuit package 1 or the shelf 2 and a rotation support member 7. The projection 76 is rotated from top to bottom in the engagement recess 74 of the rotation support member 7 which is rotatably exposed at a predetermined position in front of the rotation support member 7 and is abutted and engaged at a substantially horizontal position. The lock knob 75 is rotated in a state where the rotation support member 7 is pulled out slightly further forward from the locked state, and the projection 76 is engaged with the engagement recess 74 at the substantially vertical position above. The present invention is also achieved by the optical cable connection structure of the subscriber terminal device of the present invention, which unlocks and unlocks.

[0012]

In other words, the connector connecting portion is connected to the plate-like rotating support member 7.
72, which is normally stored in the recess 22 and does not travel in the front-rear direction.Only during the connection operation, if you pull out and turn it forward and lock it in place, the connection section 72 will be exposed and sufficient work space And a reliable operation can be performed.

FIG. 1 is a view for explaining the principle of the present invention. FIG. 1 (a) is a side sectional view and FIG. 1 (b) is a front view. As shown in FIG. 1B, the subscriber terminal device 4 includes a plurality of circuit packages 1 in a housing 3.
Are mounted side by side on the shelf 2 by plug-in connection, and a cable introduction section 88 is located below the shelf 2. The circuit package 1 on which the optical module 12 is mounted is disposed at the leftmost or rightmost position (the figure shows the case at the leftmost side). FIG.

The tip of the rod portion of the rudder-shaped rotation support member 7 is pivotally supported by the circuit package 1, the base of which is a connecting portion 72, and an elongated recess 74 is provided at the rear thereof. The rudder-shaped part is an extra-length storage part 71, and a tension spring is provided between the trailing edge of the rudder-shaped part and a predetermined position of the shelf 2 or the circuit package 1 behind it.
73 is urged to pull the rotation support member 7 backward. As a result, the rear edge of the rod portion or the rudder-shaped portion abuts against the concave portion 22 provided at the bottom of the shelf 2 and the rotation support member 7
Is stored. The rotation support member 7 is pulled out by hand against this bias and rotated forward, and the protrusion of the lock knob 75 on the front side of the adjacent side surface of the circuit package 1 or the shelf (the figure shows the case of the circuit package 1). When the insertion 76 is inserted into the engagement recess 74 by turning the engagement, the projection 76 acts as a stopper to lock the rotation support member 7 in that position against the backward bias.
In this state, almost all of the rotation support member 7 is exposed, so that the connection processing of the optical fiber cords 14 and 32 can be performed sufficiently reliably.

First, the optical fiber cord 32 from the optical cable 31 coming up from the cable introducing section 88 is wound into a diameter larger than the allowable diameter to absorb the excess length, and is pulled out from the optical connector 33 at the tip and the optical module 12. The optical fiber cord 14 and the optical connector 13 are connected and fixed at the connection part 72. Alternatively, the connection at the connection member 72 can be easily released.

After the work is completed, if the lock knob 75 is turned to disengage the projecting member 76, the rotation supporting member 7 is retracted by the urging and is stored in the concave portion 22. Due to the rotation of the rotation supporting member 7, the bending diameter of the optical fiber cord 14 becomes larger than usual in the optical fiber cord 14 with respect to the bending of the optical fiber, so that there is no problem. Although it is stretched, the length from the extra length storage portion 71 to the cable introduction portion 88 is long, and the free shape can be adopted without causing any difficulty.

As a result, no extra space is required in the front-rear direction of the mounted circuit package 1,
Can be made smaller than in the prior art. Thus,
Advantageous Effects of Invention According to the present invention, it is possible to provide an optical cable connection structure of a subscriber terminal device with a connector connection that minimizes the space for optical fiber connection without waste.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the embodiments shown in the drawings. The same reference numerals indicate the same objects throughout the drawings. 2A and 2B show an optical cable connection structure according to an embodiment of the present invention, wherein FIG. 2A is a front view of the device, FIG.
(c) is a lock state diagram.

This embodiment is applied to an outdoor installation housing, and as shown in FIG. 2 (a), about width 25 × height 50 × depth 25cm.
The shelf 2 is attached to the upper part of the waterproof front door type housing 3, the power supply unit 8 is provided at the lower part, and the cable introduction part is provided at the lowermost part.
The power supply unit 8 may be mounted or not depending on the installation conditions.

On the shelf 2, various circuits are mounted on a printed circuit board.
A plurality of circuit packages 1 constructed as shown in FIG. 11 are combined, inserted from the front, plug-in connected to a connector 21 on the rear side, and mounted side by side to constitute the subscriber terminal device 4.

As shown in FIG. 2 (b), mounting on the shelf 2 includes rail-shaped guide members 26 which are vertically opposed to the shelf 2 at respective mounting positions and which are mounted on the printed circuit board. The circuit package 1 is inserted by guiding the upper edge and the lower edge of the connector 11, and is plugged into the electrical circuit connector 21 disposed on the back board 27 on the rear surface and mounted.

The circuit package 1 incorporating the optical module 12 for optical-to-electrical conversion is mounted on the leftmost side, and has an optical fiber cord 14 provided with an optical connector 13 at the input / output line side.
At the front.

Further, a pivot shaft 15 is erected and fixed in the front middle portion.
A rotatable lock knob 75 having a tongue-shaped protruding portion 76 protrudes from the lower front portion.
Is provided.

The rotation support member 7 pivotally supported by the pivot shaft 15 includes:
The thin plate is formed in a rudder shape, and the pivot shaft 15 is passed through the shaft hole at the tip of the rod portion, and a set screw is screwed into the shaft to prevent the shaft from coming off. The rod base serves as a connection part 72, and an adapter for guiding the ferrule of the optical connector into the inside and abutting the end faces inside to be connected is fixed.

The rear edge of the rod base is pivoted forward to stop the front surface of the protrusion 76 of the lock knob 75 from stopping, and the protrusion 76 does not fall below a substantially horizontal position. Are formed as engagement recesses 74. Of course, the engagement recess 74 may be formed as an elongated hole as described above.

Further, the rudder-shaped portion is formed as an extra length accommodation portion 71, and the optical fiber cord 32 is used to regulate the winding diameter and eliminate the bundling operation.
A plurality of two fork-shaped wire holders 77 each having one opening narrowed at one opening are fixedly provided upright on the winding diameter.

A small hole 78 for hooking one end of a solenoid coil-shaped tension spring 73 is formed in the rear upper part of the rudder portion. At the bottom of the shelf 2, a concave portion 22 for storing the rotation support member 7 is cut out from the front, and at the rear thereof, a stopper 79 is provided for stopping one end of the tension spring 73 without coming off.

First, the rotation supporting member 7 is connected to the circuit package 1.
And mounted on the shelf 2 with care. Next, one end of the tension spring 73 is hooked on the small hole 78 of the rotation support member 7 to urge it. At this time,
The outer edge of the engaging recess 74 abuts on the inner side of the recess 22 of the shelf 2 and is stored in a fixed position.

When the rotation support member 7 is pulled out by hand and substantially the entirety is exposed, and the edge of the engagement concave portion 74 appears before the front surface of the circuit package 1, the lock knob 75 is rotated counterclockwise to project the protrusion. When the cover 76 rotates integrally and descends from the top to the bottom, it enters the rear side of the engagement recess 74 and is stopped at a substantially horizontal position. At this position, a stopper function is performed, and the lock is performed as shown in FIG. I do.

In the locked state, even if the rotation support member 7 is touched against the protruding portion 76 when the protruding portion 76 is no longer pressed, the protruding portion 76 is prevented from rotating downward and unlocking in a horizontal position. In the engaged state with the engaging concave portion 74.

The connection work is performed in this state. First, the optical cable 31 introduced from the outside into the cable introducing section 88 connects the composite metal core wire to the terminal, and the optical fiber cord 32 separated therefrom is led into the extra-length receiving section 71 and hanged on the wire holder 77 in order. The extra length of the winding is absorbed slowly, and the optical connector 33 at the tip is fitted and fixed to the adapter of the connection portion 72.

On the other hand, the optical module 12 of the circuit package 1
The optical fiber cord 14 pulled out of the connector is formed into a length-absorbing shape on the printed circuit board 11 as shown in the figure, and the optical connector 13 at the tip is fitted and fixed to the adapter of the connection section 72 and connected.

Since these operations can be performed in a state where the rotation supporting member 7 is substantially entirely exposed to the front, it is possible to ensure safety.
In this unlocking, the rotation support member 7 is pulled out a little further forward, and there is no pressing against the protruding portion 76. Then, the lock knob 75 is rotated to the right to engage the protruding portion 76 at the substantially vertical position above. It is released. After that, the rotation support member 7 is gently returned while being biased, and is stored against the recess 22.

In the retracted state, the rotation support member 7 does not travel any back and forth. However, the user travels to the lower part of the side, but the left or right side does not particularly hinder the accommodation of the power supply unit 8.

The above embodiment is an example, and the shape and dimensions of each part are not limited to those described above.
The pivot shaft 15 and the lock knob 75 may be provided on the side surface of the shelf 2 or the stopper 79 of the tension spring 73 may be provided on the circuit package 1 side.

In the extra length storage section 71, a drum with a flange (including a divided drum) may be provided at the core instead of the wire holder 77.

[0037]

As described above, according to the optical cable connection structure of the subscriber terminal device of the present invention, a connector connection structure that minimizes the space for optical fiber connection without wasting can be obtained.
The effect on handling operation is great.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating the principle of the present invention (a) Side sectional view (b) Front view

FIG. 2 is an optical cable connection structure according to an embodiment of the present invention. (A) Front view of device (b) Enlarged side sectional view (c) Lock state diagram

Fig. 3 Conventional optical cable connection structure (a) Rear connector connection method (b) Front connector connection method

[Explanation of symbols]

1,18,19 Circuit package 2 shelf 3,
38,39 housing 4 subscriber terminal device 7 rotation support member 8
Power supply unit 11 Printed circuit board 12 Optical module 13, 16,
17,33,34 Optical connector 14,32 Optical fiber cord 15 Pivot shaft 21
Connector 22 Recess 26 Guide member 27
Backboard 31 Optical cable 71 Extra length storage 72
Connection 73 Tension spring 74 Engagement recess 75
Lock knob 76 Projecting part 77 Wire holder 78
Small hole 79 Stop part 88 Cable introduction part 91
Notch

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-55607 (JP, A) JP-A-62-32404 (JP, A) JP-A-3-52041 (JP, A) 76704 (JP, U) JP 6-10903 (JP, U) JP 63-33108 (JP, U) JP 2 36802 (JP, U) (58) Fields surveyed (Int. Cl. ⁶ , DB name) G02B 6/00 G02B 6/36 H05K 7/00 H04B 10/12

Claims (3)

(57) [Claims] A circuit of a subscriber terminal is connected to a printed circuit board (1).
Combine the multiple circuit packages (1) configured in (1) and insert them into the shelf (2) provided in the housing (3) from the front, and plug them in to the connector (21) on the rear side. A circuit package (1), which is a subscriber terminal device (4) mounted side by side and includes an optical module (12) for optical-electrical conversion, has an optical connector (1
The optical fiber cord (32) pulled out by the optical fiber cord (14) provided with 3) and separated from the optical cable (31) introduced from the outside has an extra-length receiving portion (71) and the optical fiber cord (32). 14) and a connection part (72) for connecting a connector, and a side surface of the circuit package (1) or the shelf (2) adjacent to the circuit package (1) or the shelf (2) so that the surface parallel to the printed circuit board (11) is rotated and exposed forward. It is held by a plate-shaped rotation support member (7) pivotally supported at the front, and the rotation support member (7) is pulled rearward on the shelf (2) or the circuit package (1) by a concave portion (22). A subscriber terminal, comprising: a biasing means for urging so as to be stored in the mobile terminal; and a releasable locking means for locking at a predetermined position which is rotated and exposed forward in opposition to the urging. Optical cable connection structure of the device. 2. A tension spring (73) extending from a rear portion of a rotation support member (7) and a rear portion of a circuit package (1) or a shelf (2). The optical cable connection structure for a subscriber terminal device according to claim 1, wherein: 3. The method according to claim 1, wherein the locking means is a circuit package.
Alternatively, a rotatable lock knob (75) having a tongue-shaped protrusion (76) provided on the front surface of the shelf (2), and an engagement recess (74) provided at a predetermined position of the rotation support member (7). And the engagement recess (74) of the rotation support member (7), which is rotationally exposed to a predetermined position in front.
In this state, the projecting portion (76) is pivoted from top to bottom, butted and engaged at a substantially horizontal position and locked, and in a state where the pivoting support member (7) is pulled out slightly further forward from the locked state. 2. The locking mechanism according to claim 1, wherein the locking knob is rotated so that the protruding portion is disengaged from the engaging recess at a substantially vertical position above and unlocked. Optical cable connection structure of the subscriber terminal device.