First of all, thank you for your answer.
The images I have included above are not from my device but are images from the internet. Compared to the part 222 that I have in my device, the difference is visible. I managed to get it to work by putting a pen cap over it, but that's a temporary fix.
The small black washer part 220 is used to attach the side with the groove to the tongue or to the side of part 222? Because from a technical point of view, part 222 fits perfectly into the groove and remains fixed. However, the spring remains uncentered under the shaft. The name of part 220 is Federblei.