It's always difficult to try to help out a young chap - or young lady for that matter - with a typewriter problem when the typewriter is not within easy reach - and the person with the problem is probably thousands of kilometres away. I most certainly would never call it "easy-peasy". I don't know where Joji Furukawa lives, but I'm guessing it's not just around the corner.
What I do know, because he told me so, is that Joji is 14 and has just got himself a lovely little sky blue Patria portable. And the ribbon vibrator doesn't work. He doesn't have the money, he says, to pay for a typewriter technician to fix it for him, and he wants me to help.
The best I can do, in these circumstances, is to shoot a video of the ribbon vibrator mechanism in operation in these models, and take some photos of it. The typewriters I used were a Swissa Piccola and a Voss Learnette, both the same machines as Joji's Patria.
Joji, if I were you I'd be looking closely at the photos and comparing them with all the lever and spring connections on your Patria's vibrator, and watching the video to see how they all work together to lift the ribbon to the print point with each key stroke. Good luck with it!
And now for something completely different ...
Typewriter Anatomy Quiz
What brand of typewriter does this ribbon spools set-up come from?