Summary

A ring on a pin that goes back and forward when turned in one direction .. .

Video : https://youtu.be/lhfX5ZXipeo

If you are going to print this, you will have to make 4 parts, the middle, 2x the ring and the slider.
then glue the two rings together with the slider in it. . .

BE AWARE,, i did a lot of work afterwards, making the thread deeper, sanding down the slider a bit etc. . .

but i ended up with a nice toy ..

The openscad source is also there, you could make the thread on the rod a bit deeper, that might make it easier to get it working. . .

at the top of the OpenScad file there is a section that selects what to render, so you can export the STL's of all parts separately

//draw="All"; << all parts in one drawing (not suitable for printing)
//draw="Screw"; << only the screw
//draw="Slider"; << only the slider
//draw="Nut"; << one half of the nut. . .

I repeat, it took me a fair bit of effort to get it to work. .