JPH07244230A - Optical signal transmitter/receiver - Google Patents

Abstract

PURPOSE:To provide an optical signal transmitter/receiver which is easy to be assembled and eliminates useless operations. CONSTITUTION:This optical signal transmitter/receiver is constituted by mounting an optical signal transmission/reception module 10 composed integrally with a transmitter and receiver at a substrate 14 for optical signal transmission and reception. Both side parts of the optical signal transmission/reception module 10 are provided with projecting parts 12 or recessed parts 11. The substrate 14 is provided with holders 15, 16 formed with recessed parts 20 or projecting parts 19 fitting to the projecting parts 12 or the recessed parts 11 in the position to be mounted with the optical signal transmission/reception module thereon so that the optical signal transmission/reception module 10 is freely attachably and detachably mounted at these holders 15, 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical transmitter / receiver in which an optical transmitter / receiver module integrally formed for transmitting and receiving is mounted on a transmitting / receiving board.

[0002]

2. Description of the Related Art FIG. 3 shows a conventional example of an optical transceiver.

An optical transmission / reception module 2 which is composed of an optical connector, a light emitting element, a light receiving element, a transmitting circuit, a receiving circuit and the like and is housed in a case, and a signal processing circuit (parallel / serial converting circuit, etc.) on a transmitting / receiving substrate 1. The optical transmitter / receiver is formed by soldering and

[0004]

By the way, in the conventional example shown in FIG. 3, when the optical transmission / reception module 2 and the signal processing circuit 3 are mounted or connected as the transmission signal becomes faster, the signal wiring It becomes necessary to pay attention to impedance matching and suppression of crosstalk, which makes handling difficult. Therefore, an optical transceiver in which the optical transceiver module 2 and the signal processing circuit 3 are integrated has been proposed.
In such an optical transmitter / receiver, a parallel / serial conversion circuit and the like are also incorporated inside the optical transmitter / receiver module, and the input / output signals of the optical transmitter / receiver module are low-speed parallel signals that are easy to handle.

However, as described above, in an optical transceiver in which even a signal processing circuit is built in, the case becomes large and complicated, and the case must be changed according to the configuration and scale of the built-in circuit. is there.

Further, there is a problem that it is difficult to carry out a test or inspection of only the optical transmitting / receiving section. Furthermore, when an element or circuit of the optical transceiver fails, that element (circuit)
Either only replace or make the optical transceiver defective. In the prior art, when replacing a defective element (circuit), the work is very troublesome. On the other hand, there is also a problem in that the yield is deteriorated if the product is defective.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to solve the above problems and provide an optical transceiver which is easy to assemble and does not waste work.

[0008]

In order to achieve the above object, the present invention is an optical transmitter / receiver in which an optical transmitter / receiver module formed integrally with a transmitter / receiver is attached to a transmitter / receiver substrate. A holder or a concave portion or a convex portion that fits with the convex portion or the concave portion is provided at the optical transceiver module mounting position on the substrate so that the optical transceiver module can be detachably attached to the holder body. It is the one.

Further, the optical transmitter / receiver of the present invention is electrically connected to the optical transmitter / receiver module detachably mounted on the holder on the circuit board on which the signal processing circuit for processing the signal of the optical transmitter / receiver module is formed. A connector may be provided.

Further, according to the present invention, in an optical transmitter / receiver in which an optical transmitter / receiver module formed integrally with a transmitter / receiver is attached to a transmitter / receiver substrate, a convex portion or a concave portion is formed on both sides of the optical transmitter / receiver module to form a plurality of optical transmitter / receivers. One in which the modules are fitted to each other at the concavo-convex portions so as to be in close contact with each other, and the transmission / reception substrate is provided with a holding body having concave portions or convex portions that are fitted to the convex portions or concave portions on both sides of the connected optical transmitting / receiving module. Is.

[0011]

According to the above structure, by fitting the convex portion or concave portion of the optical transceiver module into the concave portion or convex portion of the holder, the optical transceiver module can be mounted on the substrate through the holder. Optical transceivers can be assembled. When exchanging the optical transmission / reception module, the optical transmission / reception module may be pulled out from the holder and another optical transmission / reception module to be exchanged may be mounted, which facilitates repair and improves the yield.

By mounting the circuit board on which the signal processing circuit is formed on the holder, it is possible to electrically connect to the optical transceiver module through the connector.
Assembling the optical transceiver becomes easier. When exchanging the signal processing board, the optical transmitter / receiver module can be pulled out from the holder and another optical transmitter / receiver module can be mounted, which facilitates repair.

By arranging a plurality of optical transmitter / receiver modules in the lateral direction and fitting the convex portions and the concave portions of the adjacent optical transmitter / receiver modules, the plurality of optical transmitter / receiver modules are closely connected in the lateral direction to be connected. The optical transmitter / receiver can be miniaturized without taking an extra space between the optical transmitter / receiver modules.

[0014]

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

FIG. 1 is an external perspective view of an embodiment of the optical transceiver of the present invention.

In the figure, reference numeral 10 denotes an optical transceiver module, and a trapezoidal recess 11 is formed on one side surface of a case of the optical transceiver module. On the other side surface of the case of the optical transceiver module 10, there is formed a trapezoidal convex portion 12 that spreads outward. Connector pins 13 are provided on the lower rear side of the optical transmission / reception module 10 so as to face downward, and are connected to a transmission circuit and a reception circuit (both not shown) housed in the optical transmission / reception module 10.

On the other hand, reference numeral 14 is a printed circuit board for transmission and reception (hereinafter referred to as "substrate"), and at the position of the substrate 14 where the optical transmission and reception module 10 is attached, square-shaped holders 15 and 16 made of resin are formed. It is attached with an adhesive material with a spacer 17 made from The length of the spacer 17 in the longitudinal direction is substantially equal to the width W of the optical transceiver module 10.

A groove 18 is formed in the longitudinal direction on the (inner) holding body 16 side in front (on the left side in the figure) of one holding body 15, and the groove 18 has a trapezoidal cross section in a direction perpendicular to the substrate 14. The convex portion 19 is formed. The convex portion 19 is adapted to fit into the concave portion 11 of the optical transceiver module 10. A concave portion 20 having a trapezoidal cross section is formed in the direction perpendicular to the substrate 14 on the front (inner) holding body 15 side of the holding body 16. The concave portion 20 is the convex portion 1 of the optical transceiver module 10.
It is designed to fit with 2. Grooves 22 and 23 that match the thickness t and the length L of the circuit board 21 to be described later are formed in the longitudinal direction inside the rear portion of the holding body 15 and inside the rear portion of the holding body 16.

On the other hand, the circuit board 21 is formed with a signal processing circuit 24 including an integrated circuit for processing signals of the transmitting circuit and the receiving circuit, a chip-shaped resistor and the like. The circuit board 21 is provided with a connector 25 that fits into the connector pin 13, and is connected to the signal processing circuit 24.

Next, the operation of the embodiment will be described.

The circuit board 21 is inserted into the grooves 22 and 23 of the holders 15 and 16 so that the connector 25 is on the upper side and on the front side. When the circuit board 21 is inserted into the holders 15 and 16, the convex portion 12 of the optical transceiver module 10 is inserted into the holder 16
When the optical transceiver module 10 is inserted into the concave portion 20 of the above so that the concave portion 11 fits into the convex portion 19, the optical transceiver module 10 is attached to the holders 15 and 16, and
Since the connector pin 13 and the connector 25 are connected,
The optical transmitter / receiver circuit and the signal processing circuit 24 are electrically connected, and the optical transmitter / receiver can be easily assembled.

When either the optical transmitter / receiver module 10 or the circuit board 21 fails, the optical transmitter / receiver module 10 is pulled out from the holders 15 and 16 and then,
Since the circuit board 21 can be pulled out, the optical transceiver module 10 and the circuit board 21 can be easily replaced, and the repair is simplified. Therefore, the manufacturing yield of the optical transceiver is improved.

In the above, according to the present embodiment, the optical transceiver module is detachably attached to the holder, so that an optical transceiver which is easy to assemble and has no wasteful work can be realized. In this embodiment, the case where the number of the convex portions and the concave portions formed on the optical transceiver module and the holding body is two has been described, but the number may be four or more, and may be larger than that shown. In this case, the mounting stability of the optical transmitter / receiver module is improved, and the optical transmitter / receiver module can be made stronger against changes in the external environment such as vibration.

Here, in an optical transmitter / receiver module used in a LAN (local area network) or the like, two or more optical transmitter / receiver modules are laterally arranged and fixed to a substrate. However, at this time, extra space is taken up. Therefore, an optical transmitter / receiver in which an extra space is not generated even if a plurality of optical transmitter / receiver modules are arranged in the lateral direction will be described.

FIG. 2 is an external perspective view of another embodiment of the optical transceiver of the present invention.

In the figure, reference numerals 30 and 31 denote optical transceiver modules having the same shape. A concave portion 32 similar to the concave portion 11 and a convex portion 33 similar to the convex portion 12 shown in FIG. 1 are formed on both sides of the case of the one optical transmitting and receiving module 30, and both sides of the case of the other optical transmitting and receiving module 31. A concave portion 34 and a convex portion 35 are formed in the portion. The convex portion 33 of the optical transmitter / receiver module 30 is formed so that it can be fitted into the concave portion 34 of the optical transmitter / receiver module 31. Connector pins 36 are provided on the lower rear side of the optical transmitter / receiver module 30 and are connected to a transmitter / receiver circuit housed in a case. Connector pins 37 are also provided on the lower rear side of the optical transmitter / receiver module 31 and are connected to a transmitter / receiver circuit housed in the case.

These two optical transceiver modules 30, 3
1 is attached to the substrate 38 in a connected state, and two holders 39 and 40 are attached to the substrate 38 at the optical transceiver module attachment positions.
A convex portion 41 that fits into the concave portion 32 of the optical transceiver module 30 is formed inside the holder 39 (on the holder 40 side), and a convex portion of the optical transceiver module 31 is formed inside the holder 40 (on the holder 39 side). A recess 42 that fits into the portion 35 is formed.

The board 38 is provided with connectors 43 and 44 at positions corresponding to the connector pins 36 and 37.
Signal processing circuits 45 and 46 for processing the signals of the optical transmission / reception modules 30 and 31 are mounted by soldering on the rear side of the connectors 43 and 44 of the board 38, and are connected to the connectors 43 and 44. .

The optical transmission / reception module 30 and the optical transmission / reception module 31 can be connected laterally in close contact with each other when the convex portion 33 and the concave portion 34 are fitted to each other. Therefore, no extra space is generated, and the optical transceiver can be downsized. Further, since the convex portion 33 is formed in a trapezoidal shape that spreads outward, it is difficult for the convex portion 33 to come off in the lateral direction. When the optical transmitter / receiver module 30 and the optical transmitter / receiver module 31 are connected to each other and then mounted on the holders 39 and 40, the concave portions 32 of the optical transmitter / receiver module 30 are fitted into the convex portions 41 of the holder 39, and the optical transmitter / receiver module 31 is protruded. Part 35
Fits into the recess 42 of the holder 40, and the connector pins 36 and 37 are connected to the connectors 43 and 44, respectively. Therefore, the transmitting and receiving circuits of the optical transmitting and receiving modules 30 and 31 and the signal processing circuits 45 and 46 are connected. Are electrically connected to each other, and the optical transceiver can be easily assembled.

When replacing the optical transmitter / receiver module 30, the optical transmitter / receiver module 30 is replaced with the optical transmitter / receiver module 3.
0, the connector 44 and the holder 40 are pulled up and removed, and then the optical transmitter / receiver module 30 is pulled up from the holder 39 and the connector 43 and removed, another optical transmitter / receiver module of the same shape is mounted, and the optical transmitter / receiver module 31 is mounted. It can be done by When replacing the optical transmitter / receiver module 31, the optical transmitter / receiver module 31 is replaced with the optical transmitter / receiver module 30, the connector 44 and the holder 40.
Then, the optical transceiver module having the same shape may be mounted by pulling it up and removing it.

That is, a convex portion or a concave portion is formed on both sides of the optical transmitting / receiving module, and a plurality of optical transmitting / receiving modules are fitted and closely adhered to each other at the concave / convex portions, and the optical transmitting / receiving module connected to the transmitting / receiving substrate. By providing the holder having the concave portions or convex portions that are fitted to the convex portions or concave portions on both sides, it is possible to realize a small-sized optical transceiver which can be easily assembled and repaired.

In this embodiment, the optical transceiver module is 2
Although explained in the case of individual, it is not limited to this,
It goes without saying that the number may be three or more. In addition, although the optical transceiver module has the same shape in the figure, a convex portion may be formed on both sides of one optical transceiver module and a concave portion may be formed on both sides of the other optical transceiver module. The part may be formed on the opposite side surface part. Needless to say, in any case, the substrate is formed with a holder having a concave portion or a convex portion which is fitted to the convex portions or the concave portions on both sides of the connected optical transmitting / receiving module.

[0033]

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

(1) Since the optical transceiver module and the circuit board can be removably mounted on the holder mounted on the substrate, an optical transceiver which is easy to assemble and has no wasteful work can be realized.

(2) Since a plurality of optical transmission / reception modules can be detachably attached to a holder attached to a substrate in a state where they are closely connected in the lateral direction, they are small in size, easy to assemble and useless. Can be realized.

[Brief description of drawings]

FIG. 1 is an external perspective view of an embodiment of an optical transceiver according to the present invention.

FIG. 2 is an external perspective view of another embodiment of the optical transceiver of the present invention.

FIG. 3 is a conventional example of an optical transceiver.

[Explanation of symbols]

 10 Optical Transmitting / Receiving Module 11,20 Recessed portion 12,19 Convex portion 14 Transmission / reception substrate (substrate) 15,16 Holder

Claims (3)

[Claims] 1. An optical transmitter / receiver in which an optical transmitter / receiver module integrally configured for transmission and reception is attached to a transmitter / receiver substrate,
Providing convex portions or concave portions on both sides of the optical transceiver module, at the optical transceiver module mounting position on the substrate,
An optical transmitter / receiver, characterized in that a holder having a concave portion or a convex portion that fits with the convex portion or the concave portion is provided, and the optical transceiver module is detachably attached to the holder. 2. A connector for electrically connecting to the optical transmission / reception module, which is detachably provided on the holder, is provided on a circuit board on which a signal processing circuit for processing signals of the optical transmission / reception module is formed. The optical transmitter / receiver according to claim 1. 3. An optical transmitter / receiver in which an optical transmitter / receiver module configured integrally with a transmitter / receiver is attached to a transmitter / receiver substrate,
A convex portion or a concave portion is formed on both sides of the optical transmitting / receiving module, and a plurality of optical transmitting / receiving modules are fitted to each other by the concave / convex portions so as to be in close contact with each other, and convex / concave on both sides of the optical transmitting / receiving module connected to the transmitting / receiving substrate. An optical transmitter / receiver, comprising: a holder having a concave portion or a convex portion that fits with the concave portion or the concave portion.