An optocoupler with the simplest package and its assembly method

Abstract

The invention discloses an optocoupler with the simplest package and an assembly method thereof, comprising a black bushing, one end of the black bushing is provided with a first blind hole for arranging a resistor, the bottom of the first blind hole is provided with a second blind hole, The aperture of the second blind hole is smaller than the aperture of the first blind hole, and the two are coaxial, and the pins of the tungsten lamp bead are placed in the second blind hole inwardly, and the tungsten lamp bead is arranged along the length direction of the second blind hole. The pins of the in-line photoresistor are placed in the first blind hole with the pins facing outward, and the board of the in-line photoresistor is perpendicular to the tungsten lamp bead. The first blind hole outside the in-line photoresistor is sealed with black sealant. The pins of the tungsten filament lamp bead and the in-line photoresistor are all led to the outside of the black bushing. The output resistance of the optocoupler produced by solving the existing method is very different under the same voltage input condition, which buryes hidden dangers for later application, is not easy to debug, increases debugging time, and affects the batch production of oil field liquid level testers. It belongs to the technical field of photoelectric 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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