JP2504012Y2 - Optical link - Google Patents

Description

TECHNICAL FIELD The present invention relates to an optical link for connecting an electric / optical conversion element or an optical / electrical conversion element and an end surface of an optical fiber cable so as to oppose each other so as to exchange optical signals. Regarding

2. Description of the Related Art Recently, for example, an electric circuit in an electric component of an automobile has been converted into a hybrid IC, and the card substrate (IC
Card) is inserted into the specified slot, and between the circuit surface-mounted on the IC card and the external device,
An IC card connector has been developed which enables photoelectric connection via an optical link for mutual conversion between electric signals and optical signals (see Japanese Utility Model Application No. 63-42152).

Further, as shown in FIG. 6, in order to transmit and receive signals bidirectionally between the two devices A and B, an electric signal transmitted from the device A is converted into an optical signal including an electro-optical conversion element. An optical link P consisting of an optical-electrical conversion element after being converted to an optical signal by the link PL1 and passed through the optical fiber cable PF1
It is given to L2, the electric signal output from the optical link PL2 is transmitted to the device B, and the electric signal transmitted from the device B is converted into an optical signal by the optical link PL3 composed of an electric / optical conversion element. The optical link PL4 composed of an optical / electrical conversion element is given through the optical fiber cable PF2, and the electric signal output from the optical link PL4 is transmitted to the device A.

Then, in that case, two optical links PL1 and PL4 and PL2 and PL3 whose signal transmission directions are opposite to each other are respectively paired and provided between the devices A and B.

Conventionally, when pairing two optical links in this way, there is no structural integrity by simply arranging the two optical links side by side, and in particular, the lead terminal is pulled out from each paired optical link part. It is inconsistent among people.

When each paired optical link is attached to the IC card connector, the terminal structure on the connector side is similarly inconsistent.

Purpose The present invention has been made in consideration of the above points.
When pairing an optical link part consisting of an optical conversion element and an optical link part consisting of an optical / electrical conversion element, combine each of these optical link parts integrally, and especially to pull out the lead terminal from each optical link part. It provides an optical link designed to be consistent.

Configuration Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, as an optical link 8 according to the present invention, a mounting portion of a chip-shaped electric / optical conversion element 10 or an optical / electrical conversion element 11 is connected to a lead frame (lead) of the element. The optical fiber cable 16 is provided so as to be integrated with the inner mold molding portion 12 molded by a light-transmissive resin so that the terminal 9 can be pulled out to the outside.
And an outer mold forming portion 14 for inserting a cable, in which an insertion hole 15 into which the end portion of is inserted is formed.

FIG. 2 shows an optical link 8 in which an electric / optical conversion element 10 and an optical / electrical conversion element 11 are juxtaposed and paired so that optical signals can be transmitted and received bidirectionally. The case where two sets are provided is shown.

As the outer mold forming part 14 for inserting the cable, here, a resin such as a light-blocking black resin is used to mold the inner mold forming parts 12 so as to be integrated with each other so that the inner mold forming parts 12 are integrated. Molded, electro-optical conversion element 10 and optical-electrical conversion element 11
The noise caused by external light is prevented from being mixed in the optical signal exchanged between the optical fiber cable 16 and the end face of each optical fiber cable 16.

The optical fiber cable 16 inserted into the outer mold molding portion 14 for inserting the cable is fixed to the outer mold molding portion 14 side by means such as adhesion.

Further, here, in order to reduce the number of lead frames 9 (91, 92, 93) to be drawn out and to simplify the structure, the biases of the electric / optical conversion element 10 and the optical / electrical conversion element 11 arranged in parallel are set. The lead frame 91 for power application has a common lead frame configuration.

In the figure, reference numeral 92 indicates a ground lead frame, and 93 indicates an output lead frame of the photoelectric conversion element 11.

Therefore, a pair of two lead frames 91, 92 are drawn out from each electro-optical conversion element 10, and a pair of two lead frames 92, 93 are extracted from each optical-electrical conversion element 11, respectively. Will be withdrawn.

At that time, particularly in the present invention, as shown in FIG. 1 and FIG. 2, a pair of lead frames 91, 92 in each electro-optical conversion element 10 and a pair of leads in each electro-optical conversion element 11 are provided. It is characterized in that the frames 92 and 93 are divided and drawn out on both sides of the outer mold forming part 14, respectively.

Then, as shown in FIG. 1, the lead frames 9 that have been pulled out separately on both sides of the outer mold forming portion 14 are bent forward, and the tip portions of the bent lead frames 9 are bent forward. The connector terminals 3 are mounted in parallel with each other.

Incidentally, the inner mold forming portion 12, the axial displacement between the end surface of the optical fiber cable 16 inserted into the outer mold portion 14 and the electric-optical conversion element 10 or the optical-electrical conversion element 11 facing it, Alternatively, a collimating lens-shaped lens portion 13 for suppressing the attenuation of the optical signal due to the radial deviation is integrally molded.

As the electric / optical conversion element 10, for example, an LED is used. Further, as the photoelectric conversion element 11, for example, a one-chip IC in which a photodiode, a light receiving amplifier, and a waveform shaping circuit are integrated, or an IC chip composed of a phototransistor, and an IC in which a phototransistor and a normal transistor are Darlington-connected. A chip or the like is used.

FIG. 3 shows an IC card connector 17 to which the optical link 8 shown in FIG. 2 is attached.

This IC card connector 17 has a mounting portion for the optical link 8 and
Connector terminal 3 with the same configuration attached to the end of the conductor 18.
It consists of an electrical connection that plugs in directly.

In the figure, 171 indicates a holder portion in which the optical link 8 portion is stored.

On the outside of the optical link 8, as shown in FIG.
A resin housing 19 (191, 192) for clamping in the holder portion 171 of the IC card connector 17 is attached.

As the IC card connector 17, as shown in FIG.
When the IC card 1 is inserted from the insertion port 2 into the IC card insertion port 2, the spring properties of the pair of connector terminals 3 provided so as to face each other from above and below are provided. The contactor 4 with which it makes electrical contact with the terminal portion of the circuit surface-mounted on the IC card 1
The card 1 is sandwiched between the connector terminals 3 and mounted on the connector side.

Inside the insertion slot 2, a guide 5 is provided for guiding the IC card 1 inserted into the insertion slot 2 in parallel to the insertion direction.

Further, each of the contacts 4 has a bent portion 41 formed in a substantially U shape, and the bent portion 41 is constrained and installed at a predetermined position on the housing 6 side of the connector at the bent portion 41. The bent side 42 of the child 4 is the housing 6
A portion 43 of the other side, which is formed with a chevron, projects into the insertion slot 2 and comes into contact with the IC card 1.

The tip portion of one side 42 of each contact 4 that abuts the housing 6 side is inserted into the locking portion 7 formed on the housing 6 side to prevent the connector terminal 3 from coming off.

The connector terminal 3 is a lead frame 9 of the optical link 8.
It is inserted at the tip of and is attached by caulking (or soldering, spot welding, etc.). In the figure,
Reference numeral 32 shows a clamp portion by caulking.

A stopper portion 31 is integrally formed at the rear end of the connector terminal 3, and when the connector terminal 3 is inserted into the tip of the lead frame 9 of the optical link 8 to be attached,
The stopper portion 31 comes into contact with the outer wall of the optical link 8 to attach the connector terminal 3 to the tip of the lead frame 9.
Positioning of the tip of the is performed.

Then, by simply providing a stopper 31 at the rear end of the connector terminal 3, the tip of the connector terminal 3 attached to the tip of the lead frame 9 of the optical link 8 can be accurately positioned. Will be able to.

This means that a plurality of electric / optical conversion elements or a plurality of optical / electrical conversion elements are arranged in parallel in the optical link 8 portion, and the ends of the lead frames 9 pulled out in parallel from the optical link 8 are used as connectors. When installing the terminal 3,
This is advantageous in aligning the tips of the attached connector terminals 3 in a straight line.

As described above, in the optical link according to the present invention, the electrical / optical conversion element, the optical / electrical conversion element arranged in parallel, and the end of each optical fiber cable arranged in parallel so that the end faces face the respective elements. Parts are molded integrally with resin, and the lead terminals for bias power supply application in each element are integrally formed so that a pair of lead terminals for each element are separated on both sides of the molded part. When pairing an optical link part consisting of an electrical / optical conversion element and an optical link part consisting of an optical / electrical conversion element, these optical link parts should be combined with one another, especially The lead terminal can be pulled out from the optical link part consistently and optimally, and it can be attached to the IC card connector to which the optical link is attached. It has the advantage that the orderly arranged to the connector-side structure Konetaku terminal that can be simplified.

[Brief description of drawings]

FIG. 1 is a side view showing an optical link according to an embodiment of the present invention, FIG. 2 is a front sectional view of the optical link, and FIG. 3 is a perspective view showing an IC card connector and an optical link attached thereto. FIG. 4 is an exploded perspective view showing a housing mounted on the outside of the optical link, FIG. 5 is a side sectional view showing an example of the configuration of an IC card connector, and FIG. 6 is a view for transmitting / receiving an optical signal between two devices. It is a figure which shows the structure of the optical link when it is made to carry out toward the direction. 1 ... IC card, 3 ... Connector terminal, 31 ... Stopper part, 8 ... Optical link, 9 (91,92,93) ... Lead frame (lead terminal), 10 ... Electrical / optical conversion element , 11 ……
Light-to-electricity conversion element, 12 ... Inner mold part, 14
…… Outer molded part, 16 …… Optical fiber cable, 17 …… IC card connector

Claims (1)

(57) [Scope of utility model registration request] 1. An optical / optical conversion element, and an optical link in which an optical / electrical conversion element and an end face of each optical fiber cable are opposed to each other so that optical signals can be transmitted and received bidirectionally. The molded electrical / optical conversion element and the optical / electrical conversion element and the end portions of the optical fiber cables arranged in parallel so that the end faces of the elements are integrally molded with resin, and An optical link characterized in that lead terminals for applying a bias power source are integrally formed so as to be common, and a pair of lead terminals are separately drawn out from each element on both sides of a molded portion.