I'm looking for the best way to use an electrical component to push down a plunger of a small sprayer as fast as one would by a finger. The sprayer bottles are small like this one in size and force reqd to push down the plunger for one metered spray to emit some low-viscosity liquid: http://bit.ly/small-perfume-bottle
I don't know how much force it requires to push the plunger but for the size of the sprayer it seems like you need a healthy bit of force to push it. Once pushed it should immediately release the pressure, allowing the plunger to fully retract. This will be driven by a 9v battery or possibly 2-4 double or triple A ones.
So, it seems like solenoids have to be possibly too big to deliver enough force just straight down axially with the plunger, but not sure. I'd like to have something not much bigger than the bottles.
I'm not at all sure what the standard mechanism is to do this in existing products; a screw drive, a solenoid with a lever? Spent a good 2 or 3 hours looking but was unsuccessful.
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