Good day to you. Here are a few pictures...hope they help.
Pic1. All the parts separated. The item furthest to the left came out flying first followed by the spring and the plastic bit....the washer I found on the ground after trying to see if I got all that fell out and to be honest I'm doubting it even belongs there now.
Pic 2 & 3: I am guessing here that the spring goes inside the housing and the plastic but on top (flat end inside the spring), this way when pressing on the plastic bit the spring will compress.
Pic 4 & 5: Different ways of positioning the washer. I don't think either of them are correct. Especially the fifth pic, that way the spring cannot be compressed by the plastic piece.
Pic 6: Just showing how the plastic piece fits inside the spring. There is no other place that plastic piece goes...i tried inserting it into the housing but the mid diameter is too big on the plastic bit.
I can't separate the images and add text between them like you do....sorry about that.
Let me know what you think.