JP3342823B2 - Optical connector - 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 connector, and more particularly, to an optical connector in which a backplane is sandwiched between front and back sides by a housing main body and a fixing component.

[0002]

2. Description of the Related Art As a plug-in type optical connector, a so-called backplane connector has been conventionally provided. FIG. 5 shows an example of the backplane connector. In FIG. 5, reference numeral 1 denotes a plug-in unit, 2 denotes a printed board, 3 denotes a backplane, 4a and 4b denote MPO connector plugs (hereinafter, "MPO plugs"), 5 denotes a print board housing, and 6 denotes a backplane housing. The backplane connector is formed by inserting the printed board 2 to which the printed board housing 5 is fixed into the plug-in unit 1, and connecting the printed board 2 to the backplane housing 6 attached to the backplane 3 disposed on the side of the plug-in unit 1. Are fitted and assembled. The fitted printed board housing 5 and the backplane housing 6 constitute an optical connector adapter 7, and an MPO plug 4 inserted from both sides.
a and 4b are connected to each other. Print board housing 5
MPO plug 4 to be inserted into optical connector adapter 7 from the side
“a” is inserted in the print board housing 5 in advance, and the print board 2 is inserted into the optical connector adapter 7 at the same time as the plug-in unit 1 is inserted. Since a plurality of printed boards 2 can be housed in parallel in the plug-in unit 1 at high density, the optical connector adapter 7 can be mounted at high density in this backplane connector. The MPO plugs 4a, 4b
Is an optical connector having a configuration in which an optical connector ferrule 4c defined in JIS C5981 is supported by a plastic housing.

FIG. 6 is an exploded perspective view showing the backplane housing 6. As shown in FIG. 6, the backplane housing 6 includes a housing main body 8 and a rear housing 9 which are arranged on both sides of the backplane 3 so as to face each other. The housing body 8 is connected to the printed board 2 (FIG. 6).
The rear housing 9 is disposed on the opposite side of the housing main body 8 via the back plane 3.
A pin 10 protrudes from the housing body 8, and the pin 10 is inserted into a mounting hole 11 opened in the backplane 3 and protrudes to the opposite side of the backplane 3. It is fixed with screws 12.

FIG. 7 shows a mounting hole 11. As shown in FIG. 7, the mounting hole 11 has a rectangular shape and has extended portions 13 at four corners. The pin 10 is housed in a pair of extension portions 13, 13 facing each other along a diagonal line of the mounting hole 11, and a gap 14 of about a = 1.60 mm is secured in a vertical direction (up and down in FIG. 7). Also in the horizontal direction (left and right in FIG. 7), b =
A gap 15 of about 0.34 mm is secured. Since the housing main body 8 and the back housing 9 sandwich the backplane 3 so as to be slidable, the backplane housing 6 can float within the movable range of the pins 10 and 10 in the gaps 14 and 15. Thereby, as shown in FIG. 5, the dimensional crossing when the print board housing 5 is fitted to the backplane housing 6 is absorbed by the floating of the backplane housing 6 to improve the fitting workability.

[0005]

By the way, in the case of the above-mentioned backplane connector, the screw 12 has a diameter of about 1.2 mm, and it takes time and effort to fix the rear housing 9 with a hand tool, and the workability is unsatisfactory. there were. In particular, when this backplane connector is installed on a wall of a building or the like, in many cases, a sufficient work space cannot be secured, and the problem of the workability becomes more prominent. Further, since the screw 12 itself is a special product, it is difficult to reduce the cost, and since the pins 10 and the screw holes 16 (see FIG. 6) are formed corresponding to the screw 12, there is a problem that the manufacturing is troublesome. . Further, mounting holes 1 formed in the backplane 3
Since 1 also has a complicated shape corresponding to the screw 12, there is a problem that it takes time to form the mounting hole 11.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and can be easily attached to a backplane by an elastic claw provided on a fixed part. Further, the number of parts is reduced because fixing screws and the like are unnecessary. It is an object of the present invention to provide an optical connector capable of reducing the cost.

[0007]

According to the present invention, there is provided a housing body and a fixing component which are disposed on both sides of the backplane so as to be opposed to each other, and which are mounted so as to be sandwiched by the backplane. Wherein the fixed component is a plug insertion hole into which the optical connector plug is inserted, wherein the optical connector plug is connected to another optical connector plug inserted from a direction facing the optical connector plug. And an elastic claw that is disposed opposite to both sides of the plug insertion hole and is engaged by being inserted into the housing main body. The elastic claw is engaged with the housing main body through the mounting hole of the backplane, and The housing body and the fixed component are attached so as to sandwich the backplane, and The optical connector lug insertion hole is characterized in that so as to communicate to the mounting hole and the housing body and the solutions of the problems.
The optical connector is attached such that the backplane is sandwiched between the housing main body and the fixed component by engaging the elastic claws with the housing main body through the mounting holes opened in the backplane. Further, the elastic claw can be configured to be detachable from the housing body,
Thereby, the removal workability is improved.

Further, in the present invention, a configuration is adopted in which a clearance is secured around the elastic claw inserted into the mounting hole to allow displacement of the elastic claw within the mounting hole. More preferably, the housing body and the fixed component mounted on the backplane can float within the movable range of the elastic claw in the mounting hole. In this type of optical connector, as described in the related art, an optical connector plug is attached to a plug-in component (corresponding to the printed board 2) that is positioned and supported by being plugged in the vicinity of the backplane, and the plug-in component is inserted. At the same time, a configuration in which the optical connector plug is inserted into the housing body and the optical connector adapter is assembled is often used. At this time, the plug-in component housing (corresponding to the print board housing 5) attached to the plug-in component is fitted into the housing main body, and at the same time, the optical connector plug is positioned and inserted into the housing main body. When the housing main body is floatable, when the plug-in component is fitted to the housing main body, the displacement between the two can be absorbed by the floating range of the housing main body, and the fitting workability is improved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of an optical connector according to the present invention will be described below with reference to FIGS. The optical connector (backplane connector) of the present embodiment employs a backplane housing denoted by reference numeral 20 in FIGS. 1 and 2 instead of the backplane housing 6 of the backplane connector shown in FIG. Reference numeral 20 denotes an MPO plug 4 inserted from both sides by fitting with the printed board housing 5 shown in FIG.
An optical connector adapter for connecting a and 4b (corresponding to the optical connector plug according to claim 1) to each other. In the drawings, the same components as those in FIGS. 5 to 7 are denoted by the same reference numerals, and description thereof will be simplified.

As shown in FIGS. 1 and 2, the backplane housing 20 includes a housing body 21 and a fixed part 22. As shown in FIG. 1, the housing body 21 is formed in a cylindrical shape from a synthetic resin such as plastic, and has a plug storage hole 23 for storing the inserted MPO plugs 4a and 4b. The inner housing 21a is housed in the plug housing hole 23,
a is the MPO plug 4a inserted into the plug storage hole 23,
4b is housed and positioned so as to be butt-connected by the key groove 21b. Since the inner housing 21a is engaged with the housing main body 21 by the positioning projections 21c and the engagement claws 21d, the inner housing 21a is stably supported at a predetermined position without displacement even when the MPO plug 4b is inserted or removed.

The fixed part 22 is formed in a U-shape entirely by a spring material, and includes a frame-shaped main body 24 and a pair of elastic claws 25 protruding from both sides of the main body 24. The projecting positions of these elastic claws 25, 25 are
1 and 2 (the engaging hole 26 is also located below the housing body 21 in FIGS. 1 and 2). In addition, engaging claws 27 protrude from the elastic claws 25, 25. In FIG. 2, both elastic claws 25, 25 are inserted into the mounting holes 30 of the backplane 3 and inserted into the engaging holes 26, 26 of the housing body 21 installed on the opposite side via the backplane 3, respectively.
The engaging claws 27 are engaged with the engaging portions 28 of the housing body 21.

As shown in FIG. 3, the mounting hole 30 is rectangular and extends vertically above and below the back plane 3.
The main body 24 of the fixed component 22 is larger than the mounting hole 30,
The plug insertion hole 29 opened at the center of the main body 24 is smaller than the mounting hole 30. As shown in FIG. 2, in the assembled backplane housing 20, the housing body 2
The backplane 3 is lightly sandwiched between the backplane 1 and the main body 24 by a clamp force capable of sliding. FIG.
The elastic claws 25, 25 inserted into the mounting holes 30 as shown in FIG.
A clearance is secured around the periphery of the elastic claw 25, and the displacement of the elastic claws 25, 25 is allowed in the mounting hole 30 within the range of the clearance. Therefore, the backplane housing 20 attached to the backplane 3 is allowed to float within the movable range of the elastic claws 25 in the attachment hole 30. For example, as shown in FIG. 4, the clearance is c = 0.34 mm in the horizontal direction (left and right in FIG. 4) and d = 1.60 mm in the vertical direction (up and down in FIG. 4). The pawls 25 can be displaced, and the floating range of the backplane housing 20 is set.
As a result, the print board 2 is inserted into the plug-in unit 1 (see FIG.
When the print board housing 5 and the backplane housing 2
Since the displacement between zero and zero can be absorbed by the floating of the backplane housing 20, the fitting workability is improved.

To assemble the backplane housing 20 to the backplane 3, the plug-in unit 1
(See FIG. 5) The housing main body 21 is disposed close to the target mounting hole 30 on the inner side, and the elastic claws 25 of the fixed component 22 are inserted through the mounting hole 30 from the outside of the plug-in unit 1 (right side in FIG. 1). The engaging claws 27 are engaged with the engaging portions 28 by inserting the engaging claws 27 into the engaging holes 26, 26 of the housing body 21. In addition,
An internal housing 21a is housed in the housing body 21 in advance.

Therefore, since the operation of assembling the backplane housing 20 to the backplane 3 is only required to push the fixing component 22 into the housing body 21, it is extremely simple compared with the case of fixing with the pins and the workability is improved. I do. Further, while fixing with a pin requires a work space for screw fixing, the fixing component 22
The work space can be reduced because it is sufficient to secure a space that can be accessed by the user in order to press the wall. In this optical connector, a housing component 21 is fixed to a fixed component 22 previously fixed to the back plane 3.
Can be assembled to assemble the backplane housing 20. In this case, there is no need to secure a working space outside the plug-in unit 1. Further, the clearance around the elastic claws 25, 25 inserted into the mounting hole 30 can be easily adjusted only by adjusting the shape of the elastic claws 25, 25, so that the floating range of the backplane housing 20 can be easily set. This simplifies the shape of the mounting hole 30 and improves the forming workability. further,
By not using the pins, the number of parts is reduced, and the effect of reducing the cost is also obtained.

The present invention is not limited to the above-described embodiment. For example, the shape of the engaging portion of the housing main body can be appropriately changed.

[0016]

As described above, according to the optical connector of the present invention, a plug insertion hole through which an optical connector plug is inserted is opposed to both sides of the plug insertion hole and is engaged by being inserted into the housing body. A fixed component having an elastic claw that engages with the housing main body and the fixed component by engaging the elastic claw with a housing main body that is disposed opposite to the back plane via a mounting hole opened in the back plane. Is mounted so as to sandwich the backplane, and the plug insertion hole communicates with the mounting hole and the housing body. (A) It is only necessary to engage the elastic claw with the housing body. , Which can be easily assembled and workability is improved.
(B) According to (A), since the housing body can be attached to the backplane without using pins or fixing screws, an excellent effect of reducing the number of parts and reducing cost can be obtained.

According to a second aspect of the present invention, there is provided a configuration in which a clearance is secured around the elastic claw inserted into the mounting hole to allow displacement of the elastic claw within the mounting hole. ) Since the housing main body attached to the backplane can float within the movable range of the elastic claw in the mounting hole, the workability of fitting another housing or an optical connector plug to the housing main body is improved. Since the floating range of the housing body can be easily adjusted by the elastic claw shape, the mounting hole can be made simpler than when using pins, the mounting hole can be formed easily, and the cost can be reduced. It has an excellent effect of becoming.

[Brief description of the drawings]

FIG. 1 is a view showing one embodiment of an optical connector of the present invention, and is an exploded perspective view showing a backplane housing.

FIG. 2 is a perspective view showing an assembled state of the backplane housing of FIG. 1;

FIG. 3 is a front view showing a mounting hole for mounting the backplane housing of FIG. 1;

FIG. 4 is a front view showing a clearance secured around an elastic claw in the mounting hole of FIG. 3;

FIG. 5 is an exploded perspective view showing a conventional backplane connector.

6 is an exploded perspective view showing a backplane housing of the backplane connector of FIG.

FIG. 7 is a front view showing a mounting hole of the backplane connector of FIG. 5;

[Explanation of symbols]

3 Backplane, 4a, 4b Optical connector plug (MPO plug), 21 Housing body, 22 Fixed component, 25 Elastic claw, 29 Plug insertion hole, 30 Mounting hole.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshikazu Nomura 1440 Mutsuzaki, Sakura City, Chiba Prefecture Inside Fujikura Sakura Plant (72) Inventor Masaaki Takaya 3-192-2 Nishishinjuku, Shinjuku-ku, Tokyo Telephone Co., Ltd. (72) Inventor Shinji Nagasawa 3-19-2 Nishi Shinjuku, Shinjuku-ku, Tokyo Japan Telegraph and Telephone Co., Ltd. (56) References JP-A-2-40873 (JP, A) JP-A Heisei 2-135305 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) G02B 6/38

Claims (2)

(57) [Claims] 1. A housing body (21) and a fixed part (22) which are disposed opposite to the front and back sides of a backplane (3) and are attached so as to be sandwiched between said backplanes.
And a mounting hole (30) opened in the backplane.
An optical connector plug (4b) inserted through the optical connector plug and another optical connector plug (4a) inserted from a direction facing the optical connector plug, wherein the fixed component is the optical connector A plug insertion hole (29) through which a plug is inserted, and elastic claws (25) arranged opposite to each other on both sides of the plug insertion hole and engaged by being inserted into the housing main body, wherein the elastic claw is connected to the backplane. The housing main body and the fixed component are mounted so as to sandwich the backplane by engaging with the housing main body via the mounting hole, and the plug insertion hole communicates with the mounting hole and the housing main body. An optical connector characterized in that: 2. The optical connector according to claim 1, wherein a clearance is secured around the elastic claw inserted into the mounting hole to allow displacement of the elastic claw within the mounting hole.