Why A Retractable Pen?
Click! Click! Retractable pens feature a very clever mechanism called a "push-push" mechanism. This type of mechanism exists in many forms: old push light switches, cabinet latches, sim card readers, and more. But this is probably the most recognizable implementation.
The main question: why does the pen tip press out when you push the pen down, but the pen tip retracts when you push down again? Let's get into it.
What is A Push-Push Mechanism?
A Push-Push Mechanism allows the user to toggle between two states (on/off, open/closed) with the push of one input. In this case, the press of the pen moves the pen tip out then back in.
Let's Take a Closer Look at the Features of the Mechanism
Features of the mechanism wrap around the inside of the Pen. Let's take a closer look to better understand it.
A unique pattern of grooves wrap 360° around the inside of the Barrel
Let's Better Understand the Critical Parts
The push-push mechanism lives at the top of the pen. Let's examine the three parts that make it work.
Okay, Time to Walk Through the Mechanism
Let's walk through the push-push mechanism, step by step, to understand how it all works
I'm still finishing up the rest of this breakdown. If you want to know when it's done, sign up for updates!
