JP2011145692A - Optical communication module and method of manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical communication module for firmly attaching a receptacle to a housing and reliably making electromagnetic shielding and its manufacturing method. <P>SOLUTION: The optical communication module is built by using the receptacles 10 (11) having flanges 16 with optical elements set inside, the housing 20 mounting the receptacles 10 (11) and having a light output hole 21 (a light input hole 22) smaller than the flanges 16 in a diameter, and jigs 12 (13), which have holes to which the receptacles 10 (11) are inserted and which are smaller than the flanges 16 to push the flanges 16 to the housing; and the flanges 16 plug up the light output hole 21 (the light input hole 22) by the pressure when pushed. Thus, the receptacle 10 (11) can firmly be attached to the housing, and high frequency signals generated at the connector of an optical fiber mounted on the housing are prevented from leaking to the outside. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an optical transceiver module used for optical communication. In particular, the present invention relates to a receptacle fixing method for optically connecting an optical signal between an optical fiber and a light receiving / emitting element.

  In the field of optical communication devices that have been aimed at miniaturization, the communication device is modularized so as to be detachable from a cage or the like. For example, a light emitting / receiving element such as a semiconductor laser or a photodiode is housed in a case, this case is provided facing the end face of the optical fiber, and an optical signal is incident on or emitted from the end face of the optical fiber, and light is transmitted through the optical fiber. Receptacles for introducing or deriving signals have been proposed.

  Further, for further miniaturization, there has been proposed one that provides at least one optical transmission module and one optical reception module in one housing to provide one channel for optical communication as one unit.

  In order to improve the reliability of such optical communication modules, it is important to shield the optical connections so that unnecessary high-frequency signals do not leak outside the module. It becomes a difficult task.

  As shown in FIG. 1, the optical module disclosed in Patent Document 1 is provided with a fixing jig for sandwiching the receptacle from above and below, and this fixing jig is fixed to the gauge.

JP 2005-249892 A

  However, the fixing method of Patent Document 1 is a configuration in which the receptacle is only fixed to the gauge, and a high-frequency signal leaks from the connection portion between the receptacle and the optical fiber connector portion.

  In addition, a method of fixing the receptacle to the housing with an adhesive is also used, but since the fixing is performed while aligning the optical axes of the optical fiber, light emission, and light receiving element, the efficiency of the assembly work is poor, and attachment and removal are difficult. There was a problem that it was not easy.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an optical communication module that stably fixes a receptacle to a housing and reliably shields high-frequency signals and a method for manufacturing the same. .

In order to achieve such an object, an optical communication module of the present invention includes an optical element inside, a receptacle having a flange portion, and a hole on which the receptacle is mounted and having a diameter smaller than that of the flange portion. A housing into which the receptacle is inserted, and a jig that has an opening smaller than the collar portion and presses the collar portion against the housing. Thus, the hole is closed.
Thus, according to the present invention, the receptacle having the collar portion is mounted on the housing, and by pressing the collar portion against the housing with the jig, the receptacle can be stably fixed to the housing, It is possible to prevent leakage of high-frequency signals generated from the connector portion of the optical fiber mounted on the housing. Further, it is possible to reliably prevent a high frequency signal generated from the optical fiber mounted on the housing from leaking from the hole.

In the optical communication module configured as described above, the jig may have a spring property and press the receptacle with stress. The jig may include a first jig that abuts on the receptacle and a second jig that presses the first jig toward the housing.
By absorbing the member tolerance with a member having a spring property, the member can be pressed against the casing without any gap.

In the optical communication module configured as described above, the casing may include a groove for fixing the second jig to the casing.
Therefore, the second jig can be easily fixed to the housing.

  The method for manufacturing an optical communication module according to the present invention includes a step of inserting an optical element inside and a receptacle having a collar portion into an opening smaller than the collar portion of the jig, and inserting the jig into the housing. The step of closing the opening by pressing the flange portion of the receptacle against the hole of the housing.

  The method for manufacturing an optical communication module of the present invention includes a step of inserting a receptacle having an optical element therein and having a collar portion into an opening smaller than the collar portion of the first jig; A step of inserting one jig, and a second jig that presses the first jig against the casing, thereby pressing the flange portion of the receptacle against the hole of the casing; And clogging the opening. The second jig may be attached to the casing by being fitted in a groove provided in the casing.

  According to the present invention, it is possible to stably fix the receptacle to the casing and to reliably shield the high frequency signal.

It is a figure for demonstrating the fixing method of the conventional receptacle. It is a figure which shows the whole structure of an optical communication module, and is a figure which shows the state which removed the receptacle and the printed circuit board from the housing | casing. It is a top view of an optical communication module. It is a figure which shows the external appearance shape of a receptacle. It is a figure which shows the shape of a connection jig. It is a figure which shows the state which has pressed the receptacle to the optical axis direction with the connection jig and the fixing jig. It is a figure which shows the shape of a fixing jig. It is a figure which shows a mode that a receptacle is fixed to a housing | casing with a screw | thread. It is a flowchart which shows a manufacture procedure.

  Preferred embodiments of the present invention will be described with reference to the accompanying drawings.

First, the overall configuration of the optical communication module will be described with reference to FIGS. FIG. 2 is an exploded perspective view in which each member is removed from the housing 20, and FIG. 3 is a top view of the optical communication module.
The optical communication module 1 has a configuration in which the receptacles 10 and 11 and the printed circuit board 14 on which the control circuits of the optical transmission module and the optical reception module are mounted are mounted on one housing 20. The optical transmission module and the optical reception module are provided in the receptacles 10 and 11, respectively.
The control circuit on the printed circuit board 14 and the receptacles 10 and 11 are electrically connected by lead wiring. A connector portion 15 is formed on the printed circuit board 14 and can communicate with the mother board. On the printed board 14, wiring for supplying power from the mother board to the printed board 14 and exchanging signals between the two is provided.

In the receptacles 10 and 11, an optical transmission unit and an optical reception unit each including a sleeve, a ferrule containing a fiber, a lens, an optical element (light emitting element or light receiving element), a holder, and the like are formed.
Further, as shown in FIG. 4, the receptacles 10 and 11 are provided with a flange portion 16 attached so that the diameter is larger than the diameter of the main body of the receptacles 10 and 11. By pressing the collar portion 16 against the housing 20 with the jigs 12 and 13 described later, it is possible to prevent the high-frequency signal generated at the joint portion between the receptacles 10 and 11 and the optical fiber connector portion from leaking to the printed circuit board 14 side. ing.

As shown in FIG. 2, the housing 20 is provided with a light guide hole 21 into which the transmission receptacle 10 is inserted and a light introduction hole 22 into which the reception receptacle 11 is inserted. The transmitting and receiving receptacles 10 and 11 are inserted into these holes 21 and 22 and pressed by the jigs 12 and 13 in the optical axis direction. The casing 20 has a configuration having no holes or gaps other than the light guide hole 21 and the light introduction hole 22.
The jigs 12 and 13 connect the receptacles 10 and 11 to the housing 20, and the coupling jig 12 and the receptacles 10 and 11 fixed to the coupling jig 12 in the direction of the light introduction hole 21 and the light outlet hole 22. And a fixing jig 13 that presses against.

  The housing 20 is provided with an optical interface unit 30 to which an optical fiber connector unit is attached. A connector unit is attached to the optical interface unit 30 and optically connected to the optical elements of the receptacles 10 and 11.

  As shown in FIG. 5, the connecting jig 12 has a configuration in which notches are provided on two opposite sides of the connecting jig 12, and the transmitting and receiving receptacles 10 and 11 are fitted into the notched portions. The connecting jig 12 has a spring property and urges the receptacles 10 and 11 in the optical axis direction by being fixed to the housing 20. The connecting jig 12 abuts on the flange portion 16 of the receptacles 10 and 11, and presses the receptacles 10 and 11 in the optical axis direction. The connecting jig 12 of the present embodiment has a shape in which both ends are cut away and the jig in the central portion is left, and is configured so as to be stressed on average as a whole. The connecting jig 12 is made of a hard and easy-to-process material such as metal (stainless steel or the like) or plastic.

  The fixing jig 13 is connected to the connecting jig 12 at both ends of the connecting jig 12 as shown in FIG. 6, and presses the connecting jig 12 and the receptacle 10 (11) in the optical axis direction. The fixing jig 13 is also made of a metal such as stainless steel or phosphor bronze having a spring property, or a plastic material. The housing 20 is provided with a groove, and the fixing jig 13 is fitted into the groove to be fixed to the housing 20. Further, the fixing jig 13 and the housing 20 may be fixed by hitting a wedge. Examples of the shape of the fixing jig 13 include (A), (B), and (C) shown in FIG. 7, but the shape is not particularly limited as long as it has a spring property.

  In this way, in this embodiment, the receptacles 10 and 11 with the flange portions 16 are provided, and the receptacles 10 and 11 are pressed and fixed in the optical axis direction by the connecting jig 12 and the fixing jig 13. Since the light guide hole 21 and the light introduction hole 22 provided in the housing 20 are firmly pressed by the collar portion 16, the high frequency signal generated on the optical interface portion 30 side does not leak to the printed circuit board side. Further, the high frequency signal generated on the printed circuit board 14 side does not leak out of the casing. The receptacles 10 and 11 may be fixed to the housing 20 by providing a screw groove as shown in FIG.

The manufacturing procedure of the optical communication module will be described with reference to the flowchart shown in FIG.
First, the printed circuit board 14 and the receptacles 10 and 11 are connected, and the receptacles 10 and 11 are fitted into the cutout portions of the connecting jig 12 (step S1).
Next, the tip portions of the receptacles 10 and 11 are inserted into the light guide hole 21 and the light introduction hole 22. At this time, it arrange | positions so that the collar part 16 of the receptacles 10 and 11 may come to the light introduction hole 21 and the light extraction hole 22 side rather than the connection jig | tool 12 (step S2).
Next, the fixing jig 13 is fixed to the connecting jig 12. As shown in FIG. 6, the fixing jig 13 is attached to both ends of the connecting jig 12 and on the opposite side of the collar portion 16 with the connecting jig 12 interposed therebetween. The fixing jig 13 is fixed by being fitted into a groove provided in the housing 20 (step S3).

  The embodiment described above is a preferred embodiment of the present invention. However, the present invention is not limited to this, and various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Optical communication module 10, 11 Receptacle 12 Connecting jig 13 Fixing jig 14 Printed circuit board 16 Collar part 20 Case 30 Interface part

Claims (7)

A receptacle provided with an optical element inside and having a collar portion;
A housing on which the receptacle is mounted and a hole having a diameter smaller than that of the collar portion is provided;
A jig for inserting the receptacle and having an opening smaller than the flange portion, and pressing the flange portion against the housing;
Have
An optical communication module, wherein the collar portion closes the hole by the pressing.   The optical communication module according to claim 1, wherein the jig has a spring property and presses the receptacle with stress.   3. The optical communication module according to claim 1, wherein the jig includes a first jig that contacts the receptacle, and a second jig that presses the first jig toward the housing. 4. .   4. The optical communication module according to claim 3, wherein the casing has a groove for fixing the second jig to the casing. Inserting an optical element inside and a receptacle having a collar into an opening smaller than the collar of the jig;
Step of closing the opening by pressing the flange portion of the receptacle against the hole of the housing by inserting the jig into the housing;
A method for manufacturing a module for optical communication, comprising: Inserting an optical element inside and a receptacle having a collar into an opening smaller than the collar of the first jig;
Inserting the first jig into the housing;
Inserting the second jig that presses the first jig against the casing, and pressing the flange of the receptacle against the hole of the casing, thereby closing the opening;
A method for manufacturing a module for optical communication, comprising:   The method for manufacturing an optical communication module according to claim 6, wherein the second jig is attached to the casing by being fitted in a groove provided in the casing.

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