A wooden police baton has to be hung on the back of an officer and released only when s/he wants it to be released. I thought about "push to stow, push to release". This is a thought experiment, I am not a manufacturer...
The baton is smooth without grooves so alternative solution of releasing by rotation (like BNC plugs, or push/push pen) won't work.
Where can I find a simple design of such contraption or what terms would I use to describe this?
This is a rough model of a four bar (ABCFD) which push point E toward the object to hold (LMNOQ)
The object, represent here as rectangle LMNOQ, moves on a fixed bar (HL). When pushed up (represented by piston A1 expanding), point E moves towards the edge NQ. The angle FDB (in the locked position) is > 180 , so it should be locked, as with locking pliers.
In the open position, LMNOQ is lower, and point E is far from it. (this model is only for showing the idea. I am sure it should be modified to work in the real world)
HOW can a SECOND push unlock point D?