How Do The Pop Out Latches Work?

Ripthorn

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I have been trying to search for how these work, but with no real luck. If one wanted to make a mechanism like the pop out magnetic catches frequently seen on cabinet doors, how would one do so? I have an idea I would like to try, but I can't find a good diagram or even explanation as to how it works. Any information you could share would be most appreciated. Thanks!
 
If you take apart a retractable ball point pen, you will see how it works.
It is just a spring loaded pin that pushes the door off the magnet when you push the door in a bit.
Closing the door is like clicking the pen to retract it.
opening the door is like clicking the pen for writing.
 
Push on/push off electrical switches work in a similar fashion.
 
Try Google images for " push latch "
 
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