Optocoupler with simplest package and its assembling method

Abstract

The invention belongs to an optocoupler with simplest package and its assembling method. The optocoupler comprises a black bush; one end of the black bush is provided with a first blind hole for placing a resistor, the bottom part of the first blind hole is provided with a second blind hole; the aperture of the second blind hole is less than the aperture of the first blind hole, and the first andsecond blind holes are coaxial; a pipe foot of a tungsten lamp bead is inwards placed in the second blind hole, and the tungsten lamp bead is arranged along the length direction of the second blind hole; the pipe foot of a straight photoconductive resistor is outwards placed in the first blind hole, and a plate body of the straight photoconductive resistor is perpendicular to the tungsten lamp bead; the first blind hole at the outside of the straight photoconductive resistor is packaged by a black sealing compound, the pipe feet of the tungsten lamp bead and the straight photoconductive resistor are drawn out of the outer part of the black bush. The optocoupler solves problems that the output resistance difference of the optocoupler manufactured by the existing method has big difference under the condition of the same voltage input, the difference causes hidden troubles in the later application and is not easy to debug, the debugging time is increased, and the product batch productionof an oilfield liquid face tester is influenced. The optocoupler belongs to the technical field of photoelectricity packaging.

Description

technical field [0001] The invention relates to a simple optocoupler and an assembly method, belonging to the application field of optoelectronic packaging technology. Background technique [0002] Most of the liquid level testers used in the oil field testing oil well casing annulus use a liquid level tester. The liquid level signal used by this tester needs to use a filter amplifier board. The amplifier board uses an optocoupler to automatically adjust the amplification gain. At present, the optocoupler used in the product has an in-line photoresistor and a small in-line light bulb packaged in a metal shell. Since the in-line light bulb and the photoresistor are welded in parallel on the vertical pin, the optocoupler made in this way is small. The light from the bulb will not irradiate the photoresistor vertically, resulting in a large difference in output resistance under the same voltage input, which will bury hidden dangers for later applications. Batch production of o...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an optocoupler with the simplest package and its assembly method, so as to solve the problem that the output resistance of the optocoupler produced by the existing method is very different under the same voltage input condition, which will cause hidden dangers for later application, and Difficult to debug, increase the debugging time, affect the batch production of oil field liquid level tester

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