JP3372845B2 - 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 mounted on a backplane.

[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 a backplane connector. In FIG. 5, reference numeral 1 is a plug-in unit, 2 is a print board, 3 is a back plane, 4a and 4b are MPO connector plugs (hereinafter referred to as "MPO plugs"), 5 is a print board housing, and 6 is a back plane housing. In this backplane connector, by inserting the printed board 2 to which the printed board housing 5 is fixed into the plug-in unit 1, the printed board housing 5 is attached to the backplane housing 6 attached to the backplane 3 arranged on the side of the plug-in unit 1. Are fitted and assembled. The mated printed board housing 5 and backplane housing 6 constitute an optical connector adapter 7, and the MPO plug 4 inserted from both sides.
Connect a and 4b. Print board housing 5
MPO plug 4 to be inserted into the optical connector adapter 7 from the side
“a” is previously inserted into the print board housing 5, and the print board 2 is inserted into the plug-in unit 1 and at the same time inserted into the optical connector adapter 7. Since a plurality of printed boards 2 can be accommodated in parallel in the plug-in unit 1 in high density, the optical connector adapter 7 can be mounted in high density in this backplane connector. The MPO plugs 4a and 4b
Is an optical connector configured to support an optical connector ferrule 4c defined in JIS C 5981 in 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 back housing 9 that are arranged opposite to each other with the backplane 3 interposed therebetween. The housing body 8 is on the printed board 2 side (see FIG. 6).
The back housing 9 is located on the opposite side of the housing body 8 with the backplane 3 in between.
A pin 10 is projectingly provided on the housing body 8, and the pin 10 is inserted into a mounting hole 11 opened in the backplane 3 so as to project to the opposite side of the backplane 3, and a back housing 9 is attached to the projecting tip of the pin 10. It is fixed with screws 12.

FIG. 7 shows the mounting hole 11. As shown in FIG. 7, the mounting hole 11 has a rectangular shape and has expansion portions 13 at four corners. The pin 10 is housed in a pair of expanded portions 13, 13 facing each other along the diagonal line of the mounting hole 11, and a gap 14 of about a = 1.60 mm is secured in the vertical direction (vertical in FIG. 7). B = in the horizontal direction (left and right in FIG. 7)
A gap 15 of about 0.34 mm is secured. Since the backplane 3 is slidably sandwiched between the housing body 8 and the back housing 9, the backplane housing 6 can float within the movable range of the pins 10 and 10 in the gaps 14 and 15. As a result, as shown in FIG. 5, the dimensional intersection when the printed 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 a lot of time to fix the back housing 9 with a hand tool, which makes workability unsatisfactory. there were. In particular, in the case of constructing this backplane connector on a wall of a building or the like, there are many cases where a sufficient working space cannot be secured, and the problem of workability becomes more remarkable. Further, since the screw 12 itself is a special product, it is difficult to reduce the cost, and since the pin 10 and the screw hole 16 (see FIG. 6) are formed corresponding to the screw 12, there is a problem that it takes time to manufacture. . Furthermore, the mounting hole 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.

The present invention has been made in view of the above problems, and (1) the housing body can be easily attached to the backplane simply by inserting the elastic claws provided in the attachment component into the attachment holes. ) Since the housing body is supported at the target position on the backplane via the mounting parts attached to the backplane, work on only one side of the backplane is required, improving workability and working space on the opposite side of the backplane. Is no longer necessary,
(3) Further, it is an object of the present invention to provide an optical connector that does not require a fixing screw or the like and can reduce the number of parts and reduce the cost.

[0007]

According to the present invention, there is provided a housing body to be mounted on a backplane, and an optical connector plug inserted through a mounting hole opened in the backplane and a direction facing the optical connector plug. An optical connector for connecting another optical connector plug inserted from the inside in the housing body, comprising an attachment part that is attached and fixed to the outside of the housing body and attaches the housing body to the backplane. Is a plug insertion part through which an optical connector plug can be inserted,
The pressure-bearing walls arranged opposite to each other on both sides of the plug insertion portion, and the tips of the pressure-bearing walls protruding from the pressure-bearing walls and inserted into the mounting holes .
A pair of elastic claws that engage with the backplanes on both sides of the mounting hole by engaging claws, and the housing body from the outside.
A main body that is mounted and fixed , wherein the bearing wall is the main body.
Parts and are formed between the elastic claw, that is mounted to the backplane by sandwiching said backplane between the engaging claw and the bearing capacity wall of the elastic claws engaged with the backplane has become way, when supporting a target position of the backplane said housing body by the fitting attached to the backplane, one
The optical connector is characterized in that the optical connector plug can be inserted into the housing body through the plug insertion portion and the mounting hole between the pair of elastic claws . Also, in the present invention, backplay
The housing main body is attached to the backplane.
Optical connector plugged in through the mounting hole opened in the connector
From the direction opposite to the plug and the optical connector plug
Another optical connector plug inserted is the housing
It is designed to be connected inside the body, and
One of a pair of optical connector plugs connected by the main unit
The plug-in that has the backplane
Positioning by plugging in near the backplane of the unit
Inserts attached to inserts that are supported for
Optical connector plug that is pre-inserted into the plug
By fitting the component housing to the housing body
Optical connector inserted into the plug-in housing
The plug is designed to be plugged into the housing body
Optical connector that is mounted on the outside of the housing body.
The housing body to the backplane.
A floating attachment is provided that is light
A plug insertion part through which a connector plug can be inserted, and the plug
The bearing walls facing each other on both sides of the insertion part and the protrusions from each bearing wall.
It is installed on the engaging claw at the tip by inserting it into the mounting hole.
Therefore, one that engages with the backplane on both sides of the mounting hole
Attached and fixed to the housing body from the outside with a pair of elastic claws
A main body portion, and the pressure bearing wall includes the main body portion and the
It is formed between the elastic nail and the backplane.
Between the engaging claw of the elastic claw engaged with the bearing wall,
By sandwiching the backplane, it becomes a backplane.
It can be mounted and mounted on the backplane.
Attach the housing body with the attached mounting parts.
When supported at the desired position on the
Of the pair of optical connector plugs connected by the
The other is the plug insertion part and the front part between the pair of elastic claws.
Can be inserted into the housing body through the mounting holes
An optical connector, which is characterized in that
And In this optical connector, the elastic main body protruding from the mounting component is inserted into the mounting hole opened in the backplane and engaged with the housing main body, whereby the housing main body fixed to the mounting component can be mounted on the backplane.
At this time, insert the elastic claws of the mounting part that secures the housing body into the mounting hole from one side of the backplane, or mount the housing body to the mounting part that is mounted on the backplane. Does not need to secure working space. The elastic claw can be configured to be detachable from the backplane, which improves the workability of removing the housing body.

Further, in the present invention, it is more preferable to adopt a structure 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. , The housing body attached to the backplane can be floated within the movable range of the elastic claw in the attachment hole. In this type of optical connector, conventional above
The same applies to the technology described above, but an optical connector plug is attached to a plug component (corresponding to the printed board 2) that is positioned and supported by being plugged in the vicinity of the backplane. A configuration is often used in which the optical connector adapter is inserted into the housing body and assembled. At this time, the insertion part housing (corresponding to the printed board housing 5) attached to the insertion part is fitted into the housing body, and at the same time, the optical connector plug is positioned with respect to the housing body and is accurately inserted. When the housing body is floatable,
When fitting the insertion component housing into the housing body, the positional deviation between the two can be absorbed by the floating range of the housing body, and the fitting workability is improved.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION One embodiment of an optical connector of the present invention will be described below with reference to FIGS. The optical connector of the present embodiment (backplane connector) is obtained by employing the backplane housing of FIGS. 1 and 2, reference numeral 20 in place of the backplane housing 6 of the backplane connector of FIG. 5, wherein backplane Howe The packaging 20 is inserted into the MPO plugs 4a and 4b from both sides by fitting with the printed board housing 5 shown in FIG. 5 (corresponding to the optical connector plug according to claim 1).
An optical connector adapter for connecting each other is configured. In addition,
In the figure, the same components as those in FIGS. 5 to 7 are designated by the same reference numerals to simplify the description.

As shown in FIGS. 1 and 2, the backplane housing 20 includes a housing body 21 and a mounting component 22. As shown in FIG. 1, the housing body 21 is formed of a synthetic resin such as plastic into a tubular shape, and is provided with a plug housing hole 23 for housing the inserted MPO plugs 4a and 4b. The inner housing 21 a is housed in the plug housing hole 23, and the inner housing 21 a
a is the MPO plug 4a inserted into the plug storage hole 23,
One or both of 4b are housed and positioned so as to be butt-connectable by the key groove 21b. Since the inner housing 21a is engaged with the housing body 21 by the positioning projections 21c and the engaging claws 21d, even if the MPO plug 4b is inserted and removed, the internal housing 21a is not displaced and is stably supported at a predetermined position.

The mounting component 22 is entirely formed of a spring material and, as shown in FIG. 2, has a body portion 24 which is mounted and fixed to the housing body 21 from the outside. As shown in FIGS. 1 and 2, the main body portion 24 has a gate shape, and the two flange portions 27, 27 facing each other are formed on the housing main body 21.
By engaging between the protrusions 25 and 26 protruding from the side surface, the housing main body 21 is stably fixed without displacement and the backplane housing 20 is assembled.

Elastic claws 28 are provided from the respective flange portions 27, 27.
Is protruding. Engaging claws 29 are projectingly provided at the tips of these elastic claws 28, 28 projecting from both flanges 27, 27. FIG. 3 is a perspective view of the mounting component 22 as viewed from the elastic claw 28 side. In FIG. 3, the distance between the elastic claws 28, 28 is shorter than the distance between the flanges 27, 27 of the main body 24. The engaging claws 29 of the elastic claws 28, 28 project outward from the elastic claws 28, 28.
A bearing wall 30 is formed between the main body portion 24 and the elastic claws 28, 28. The pressure bearing wall 30 sandwiches the back plane 3 with the engaging claw 29.

4A and 4B are views showing the backplane housing 20 mounted on the backplane 3, wherein FIG. 4A is a plan view and FIG. 4B is a mounting hole 3 opened in the backplane 3.
It is a front view showing 1. In FIG. 4A, the elastic claws 28, 28 are inserted into the mounting holes 31, and the engaging claws 29 are engaged with the back planes 3 on both sides of the mounting holes 31.
The backplane 3 is sandwiched between the pressure bearing wall 30 and the bearing wall 30, whereby the backplane housing 20 is attached to the backplane 3. The force for sandwiching the backplane 3 between the engaging claw 29 and the bearing wall 30 is such that the engaging claw 29 and the bearing wall 30 can slide on the backplane 3. A groove-shaped plug insertion portion 32 through which the MPO plug 4b can be inserted is formed between the elastic claws 28, 28. Since the plug insertion portion 32 communicates with the plug housing hole 23 (see FIGS. 1 and 2) of the housing body 21, the plug insertion portion 32 is inserted into the plug insertion portion 32 from the outside of the backplane 3 (left side in FIG. 4A). The MPO plug 4b can be inserted into the plug housing hole 23.

As shown in FIG. 4 (b), the mounting hole 31 has a rectangular shape and is sized so that a clearance can be secured around the inserted elastic claws 28, 28. The clearance is c = 0.34 m in the horizontal direction (left and right in FIG. 4B).
m, vertical direction (upper and lower in FIG. 4B) d = 1.60 mm
It is ensured that the elastic pawls 28, 28 can float within this range, allowing the backplane housing 20 to float. As a result, when the printed board 2 is inserted into the plug-in unit 1 (see FIG. 5) and the printed board housing 5 is fitted into the backplane housing 20,
The misalignment between the printed board housing 5 and the backplane housing 20 is corrected by the backplane housing 2
Since it can be absorbed by floating 0, fitting workability is improved.

To mount the backplane housing 20 on the backplane 3, the mounting component 22 is assembled to the housing body 21 and the backplane housing 2 is attached.
It is only necessary to assemble 0 and push the elastic claws 28, 28 into the mounting holes 31 to engage the engaging claws 29, 29 with the backplane 3, so there is no need to perform work from both sides of the backplane 3 Significantly improved. Further, since the backplane housing 20 can be attached only by the work inside the plug-in unit 1 (see FIG. 5), it is not necessary to secure a work space near the backplane 3 on the outside of the plug-in unit 1 and the building can be installed. It is advantageous when it is applied to the walls of the. The inner housing 21a is stored in the housing body 21 in advance.
Further, the clearance around the elastic claws 28, 28 inserted into the mounting holes 31 can be adjusted only by adjusting the shape of the elastic claws 28, 28, and the floating range of the backplane housing 20 can be easily set. The shape of 31 is simple, and its workability is improved. Furthermore, since the number of parts is reduced by not using the pins, the cost can be reduced.

The present invention is not limited to the above-described embodiment, and for example, the configuration for attaching the attachment component to the housing body can be changed as appropriate.

[0017]

As described above, according to the optical connector of the present invention, the pressure bearing wall to be brought into contact with the backplane in the vicinity of the mounting hole opened in the backplane, and the mounting by inserting into the mounting hole. A pair of elastic claws that engage with the backplanes on both sides of the hole are provided, and the backplane is sandwiched between the elastic claws that engage with the backplane (specifically, the engaging claws at the tip) and the bearing wall. Since the housing main body is attached to the target position of the backplane by the attachment parts attached in step (b), and the optical connector plug is inserted into the housing main body through the plug insertion portion formed in the attachment parts, It can be easily assembled by simply engaging with the housing body, improving workability. (B) Assembling the backplane only from one direction Since it can be stood up, the workability is improved. By (c) and (a), the housing body can be attached to the backplane without using pins or fixing screws, reducing the number of parts, It has an excellent effect that the cost can be reduced.

Further, if a structure is adopted in which a clearance is secured around the elastic claw inserted into the mounting hole and the displacement of the elastic claw within the mounting hole is allowed, (d) the elastic claw in the mounting hole is Since the housing body attached to the backplane can float within the movable range, the workability of fitting another housing or an optical connector plug to the housing body is improved. (E) Elastically pawls the floating range of the housing body Since it can be easily adjusted depending on the shape, the mounting hole can be made into a simple shape as compared with the case of using a pin, the mounting hole can be easily formed, and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a diagram showing an 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.

FIG. 3 is a view showing a mounting part of the backplane housing of FIG. 1, and is a perspective view seen from the elastic claw side.

4A and 4B are diagrams showing a mounting state of the backplane housing of FIG. 1, wherein FIG. 4A is a plan view and FIG. 4B is a front view.

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

FIG. 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.

[Explanation of symbols] 1 ... Plug-in unit, 2 ... Plug-in parts (print board
), 3 ... Backplane, 4a, 4b ... Optical connector plug (MPO plug), 5 ... Plug component housing, 21
... housing body, 22 ... attachment parts , 24 ... body part , 2
8 ... Elastic claws, 29 ... Engaging claws, 30 ... Bearing wall, 31 ... Mounting hole, 32 ... Plug insertion part.

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yoshikazu Nomura, Yoshikazu Nomura, 1440 Rokuzaki, Sakura City, Chiba Fujikura Co., Ltd. Sakura Factory (72) Inventor Masaaki Takaya, 3-19-3 Nishishinjuku, Shinjuku-ku, Tokyo Nihon Telegraph Telephone Corporation (72) Inventor Shinji Nagasawa 3-19-2 Nishishinjuku, Shinjuku-ku, Tokyo Nihon Telegraph and Telephone Corporation (56) Reference JP-A-2-135305 (JP, A) JP-A 2-40873 (JP, A) JPK Sho 55-35446 (JP, B2) Yukio Hayashi, Hiroshi Furukawa, Yoshikazu Nomura, Development of back-panel type multi-fiber optical connector, Proceedings of IEICE Communication Society Conference, Japan , Institute of Electronics, Information and Communication Engineers, August 30, 1996, 1996 / Society B2, 481 pages (58) Fields investigated (Int.Cl. ⁷ , DB name) G02B 6/38

Claims (4)

(57) [Claims] 1. An optical connector plug (4b), which comprises a housing body (21) to be attached to a backplane (3) and is inserted through a mounting hole (31) opened in the backplane, and the optical connector plug. An optical connector for connecting another optical connector plug (4a) inserted from the opposite direction inside the housing body, the mounting being fixed to the outside of the housing body and the housing body being attached to the backplane. Parts (2
2), wherein the mounting part is provided with a plug insertion part (32) through which an optical connector plug can be inserted, pressure bearing walls (30) arranged on opposite sides of the plug insertion part, and projecting from each pressure bearing wall. By inserting into the mounting hole, the engaging claw (29) at the tip is
Therefore, a pair of elastic claws (28) that engage with the backplanes on both sides of the mounting hole and the housing body from the outside are provided.
And a body portion which is attached and fixed (24), the bearing capacity wall
Attached to the backplane by sandwiching the backplane between the engaging claw of the elastic claw engaged with the backplane and the bearing wall , which is formed between the body portion and the elastic claw. is has become so that, when supporting a target position of the backplane said housing body by the fitting attached to the backplane, the plug insertion portion and the front between the pair of elastic pawls
An optical connector, wherein the optical connector plug can be inserted into the housing body through the mounting hole . 2. An optical connector plug (4b), which comprises a housing body (21) to be attached to a backplane (3) and is inserted through a mounting hole (31) opened in the backplane, and the optical connector plug. another optical connector plug (4a) and which is inserted from opposite directions Te has become so that connected in <br/> the housing body, a pair of optical connectors to be connected by the housing body
One of the plugs is provided with the backplane.
Near the backplane of the plug-in unit (1)
Insertion parts (2) that are positioned and supported by inserting into
Pre-inserted into the attached plug-in housing (5)
Optical connector plug and plug component housing
By fitting the housing body, the insertion part how
The optical connector plug that was plugged into the housing is
An optical connector adapted to be plugged into a main body of a housing, comprising an attachment part (22) fixedly mounted on the outside of the housing body and attached to the backplane so that the housing body can float. A plug insertion part (32) through which a plug can be inserted, pressure bearing walls (30) arranged opposite to each other on both sides of the plug insertion part, and a distal end engagement by protruding from each pressure bearing wall and inserted into the mounting hole. Artificial nail
(29) a pair of elastic claws (28) engaging with the backplanes on both sides of the mounting hole, and the housing body.
A main body part (24) that is mounted and fixed from the outside to the front
The pressure bearing wall is formed between the body portion and the elastic claw.
And engagement of the elastic pawl engaged with the backplane
Turned so that attached to the backplane by sandwiching said backplane between the pawl and the bearing capacity wall
When the housing body is supported at the target position on the backplane by the mounting parts attached to the backplane, a pair of optical cables connected by the housing body are connected.
The other of the connector plugs is the plug between the pair of elastic claws.
An optical connector, which can be inserted into the housing body via a lug insertion portion and the mounting hole . 3. The optical connector according to claim 1 or 2, wherein that allows displacement of the elastic claw at to ensure the clearance around the elastic claw that is inserted into the mounting hole the mounting hole. 4. A howe attached to a backplane (3).
With a housing body (21), opening into the backplane
Optical connector plug inserted through the mounting hole (31)
One facing the lug (4b) and the optical connector plug
With another optical connector plug (4a) inserted from the directionBut
Connected within the housing bodyIs becoming
, A pair of optical connector plugs connected in the housing body.
One of the lugs is provided with the backplane
The plug-in unit (1) near the backplane
Mounted on the insertion part (2) that is positioned and supported by inserting.
Pre-inserted in the attached plug-in housing (5)
Optical connector plug, The above mentioned
By inserting into the housing body, the plug-in housing
Optical connector plug that was plugged into the housing
It is supposed to be inserted into the body, Mounted and fixed on the outside of the housing bodyAnd thenhousing
Mounting parts for attaching the main body to the backplane (2
2) By inserting into the mounting hole,
Engages the side backplaneA pair of elastic claws (28)
One that is projected and is connected to the housing body
The other of the pair of optical connector plugs is the pair of elastic claws.
Between the plug insertion part (32) and the mounting holeThrough
Can be inserted into the housing bodyAndSpecial
Optical connector to collect.