JPH09166729A - Optical communication module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the deformation of an insertion port even when a bi- directional optical connector is inserted and to easily mount an optical coupling part by integrally forming the insertion port part into which the bi-directional optical connector is inserted with a module case. SOLUTION: A substrate 2 is mounted on a case 10 and an insertion port part 10c in which two insertion ports 10b, 10b are formed on one side of the case 10 is integrally formed with the case 10. A groove 10d is formed in the vicinity of the insertion port part 10. A fook 6 into which the receptacle 3a of a light emitting element 3 and the receptacle 4a of a light receiving element 4 are inserted, respectively. Since the insertion port part 10c is integrally formed with the case 10, even when the optical connector 8 is inserted or pulled out and stress is exerted in the vertical direction of the case 10 at the time of loading/unloading of the optical connector 8, the insertion port does not deformed and the deterioration of performance of the module is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical communication module, and more particularly to an optical communication module including an optical transmission circuit section and an optical reception circuit section in a module case.

[0002]

2. Description of the Related Art An optical communication module connected to an optical fiber for receiving an optical signal from the optical fiber and converting it into an electric signal, or converting an electric signal into an optical signal and transmitting it to the optical fiber, Already known.

FIG. 3 is a diffusion exploded view of a conventional optical communication module, and FIG. 4 is a sectional view of an optical coupling portion of the optical communication module shown in FIG.

In FIGS. 3 and 4, 1 is a module case (hereinafter referred to as “case”), 2 is a substrate on which a transmitting circuit and a receiving circuit (both not shown) are mounted, 3 is a light emitting element, and 4 is a light emitting element. The light receiving elements 5 indicate covers. Reference numeral 6 denotes a hook for fixing a bidirectional optical connector (hereinafter referred to as “optical connector”) 8 received through an insertion opening 7 formed on one side (lower left side in the figure) when the cover 1 is covered on the case 1. Show.

The board 2 is mounted in the case 1. After attaching the receptacles 3a and 4a to the through hole 6a formed in the base of the hook 6, the light emitting element 3 and the light receiving element 4 are
It is attached to the substrate 2 so as to be fixed by a groove (not shown in the figure) on the inner side surface of the case 1. The cover 5 is fixed to the case 1 through the claws 1a and the holes 5a, and the efficiency of the work of attaching the light emitting element 3, the light receiving element 4 and the hook 6 is improved.

By the way, in the structure shown in FIG. 3, the light emitting element 3 and the light receiving element 4 are caused by the insertion and removal of the optical connector 8 and the vibration of the optical communication module (hereinafter referred to as "module").
If the optical coupling portion including the hook 6 wobbles, the insertion loss becomes large, the optical output level is lowered, and the performance of the optical communication module is deteriorated, such as deterioration of the optical receiving sensitivity. Therefore, the dimensional accuracy of the groove of the case 1 and the cover 5 is strictly designed and manufactured to suppress the wobbling of the optical coupling portion.

[0007]

However, in the structure shown in FIGS. 3 and 4, since the insertion port 7 for inserting the optical connector 8 is divided into the case 1 and the cover 5, the strength is weak, and When the connector 8 is inserted / removed or when vibration is applied, vertical stress may be applied to the case 1 or the cover 5 and the insertion port itself may be deformed. As a result, the optical coupling part wobbles and the performance of the module is deteriorated. There was a fear.

Therefore, an object of the present invention is to solve the above-mentioned problems, and the insertion opening is not deformed even when the bidirectional optical connector is inserted / removed.
Another object of the present invention is to provide an optical communication module in which an optical coupling part can be easily attached.

[0009]

In order to achieve the above object, the present invention provides an optical transmission circuit section for converting an electric signal into an optical signal and emitting the optical signal to the outside, and an optical signal incident from the outside to the electric signal. In a module for optical communication in which an optical receiving circuit section for converting into a module is provided in one module case, and a receptacle and a hook for fitting with the bidirectional optical connector are connected to the module case, the bidirectional optical connector is inserted. The insertion opening is formed integrally with the module case.

In addition to the above construction, in the present invention, the hook mounting portion may be formed at a position facing the bidirectional optical connector at the insertion opening of the module case.

With the above structure, since the insertion opening of the bidirectional optical connector is formed integrally with the case, stress is applied in the vertical direction of the case when the bidirectional optical connector is inserted or removed or when vibration is applied. However, the insertion opening is not deformed, and the performance deterioration of the optical communication module can be prevented.
Also, by forming the hook attachment part at the position facing the bidirectional optical connector in the insertion opening of the module case, the hook can be easily attached, and even if stress is applied in the pulling direction of the hook, the entire insertion opening Since it is supported by, the optical coupling part will not wobble or the hook will not come off.

[0012]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a diffusion exploded view showing an embodiment of an optical communication module of the present invention, and FIG. 2 is a sectional view of an optical coupling portion of the optical communication module shown in FIG. The same reference numerals are used for the same members as in the conventional example shown in FIGS. 3 and 4.

1 and 2, the case 10 has a
A board 2 on which a transmitter circuit and a receiver circuit are mounted is attached, and an insertion opening 10c having two rectangular insertion openings 10b formed on one side (lower left side in the figure) of the case 10.
Is formed integrally with the case 10. A groove 10d and a ridge 10e are formed in the case 10 near the insertion opening 10c. Hooks 6 into which a receptacle 3a of a light emitting element (for example, a laser diode) 3 and a receptacle 4a of a light receiving element (for example, a phototransistor) 4 are inserted are fitted in the groove 10d, and the protrusion 10e forms the light emitting element 3 and the light receiving element. The grooves 3b and 4b respectively formed in 4 are fitted. That is, the attachment portion of the hook 6 is formed at a position facing the optical connector 8 of the insertion opening 10c of the case 10.

A cover 50 having a U-shaped cross section covers the optical coupling portion composed of both elements 3 and 4 and the substrate 2, and the groove 3 of the light emitting element 3 and the light receiving element 4 is provided inside thereof.
A ridge 50d that fits with b and 4b and a groove 50c that fits with the hook 6 are formed. The cover 50 is fixed to the case 10 via the claw 10a and the hole 50a.

Even when the optical connector 8 is inserted into or pulled out of such a module, the module insertion opening 10c is formed integrally with the case 10.
Even when stress is applied in the vertical direction of the case 10 when the optical connector 8 is inserted / removed or vibration is applied, the insertion opening 10b is not deformed, and the performance of the module can be prevented from deteriorating. Further, by forming the attachment portion of the hook 6 at a position facing the optical connector 8 of the insertion opening portion 10c of the case 10, the attachment of the hook 6 becomes easy.

As described above, according to the present embodiment, the optical transmission circuit section for converting an electric signal into an optical signal and emitting the optical signal to the outside, and the optical reception circuit section for converting an optical signal incident from the outside into an electric signal. In a module for optical communication in which a receptacle and a hook to be fitted with the optical connector are connected to the case, the insertion opening for inserting the optical connector is formed integrally with the case. It is possible to realize an optical communication module in which the insertion opening is not deformed even when stress is applied in the vertical direction of the case when the optical connector is inserted / removed or vibration is applied, and the optical coupling part can be easily attached. .

In the present embodiment, the case where the insertion port has two rectangular cross-sectional shapes has been described, but the present invention is not limited to this, and it may have three or more, a circular cross-sectional shape, or a polygonal cross-sectional shape. May be.

[0019]

In summary, according to the present invention, the following excellent effects are exhibited.

The insertion opening for inserting the bidirectional optical connector is
Since it is formed integrally with the case, it is possible to realize an optical communication module in which the insertion port is not deformed even when the bidirectional optical connector is inserted and removed and the optical coupling part can be easily attached.

[Brief description of the drawings]

FIG. 1 is a diffusion exploded view showing an embodiment of an optical communication module of the present invention.

FIG. 2 is a cross-sectional view of an optical coupling portion of the optical communication module shown in FIG.

FIG. 3 is a diffusion exploded view of a conventional optical communication module.

FIG. 4 is a cross-sectional view of an optical coupling portion of the optical communication module shown in FIG.

[Explanation of symbols]

 3 light emitting element 4 light receiving element 6 hook 8 bidirectional optical connector (optical connector) 10 module case (case) 10b insertion opening 10c insertion opening 50 cover

Claims (2)

[Claims] 1. A module case comprising an optical transmission circuit unit for converting an electric signal into an optical signal and outputting the optical signal to the outside, and an optical reception circuit unit for converting an optical signal incident from the outside into an electric signal in a single module case. In an optical communication module having a receptacle and a hook that are fitted to a bidirectional optical connector and connected to the module case, an insertion opening for inserting the bidirectional optical connector is formed integrally with the module case. An optical communication module characterized by the above. 2. The optical communication module according to claim 1, wherein the attachment portion of the hook is formed at a position of the insertion opening of the module case facing the bidirectional optical connector.