I am trying to understand, in detail, what is going on inside. What components are involved and interacting. A cross-section view would be very useful. Seems like there are springs and ball bearing involved but I'm not sure. Relevant video: https://youtu.be/FZuSmCx4tzg?t=46 Relevant product link: https://www.amazon.com/Aluminum-Diameter-Release-Button-Bonnet/dp/B08JLR8F5T
$\begingroup$ probably a similar mechamism to an air hose coupler ... duckduckgo.com/?q=airhose+coupler&iax=images&ia=images $\endgroup$– jsotolaJul 5, 2022 at 15:38
$\begingroup$ @jsotola or a click to retract / extend pen, Pierce Brosnan used one in Goldeneye. $\endgroup$– Solar MikeJul 5, 2022 at 20:27
You're right, the system operates with spring and ball.
And as pointed out this system is easily found searching using terms like "spring ball release mechanism" or derivatives.
Here's one image with a quick search (found on the third result on images from patent for a similar mechanism)
Edit: Link: https://patents.google.com/patent/US9431162B2/en
This patent is for a solenoid system (not exactly the same as the button as pointed out).
$\begingroup$ All the same, it would be helpful to describe exactly how #142 holds the pin in place until exterior forces on #150 exceed some value. This drawing seems to depend on gravity for the latching mech to work. $\endgroup$ Jul 5, 2022 at 12:30