I. Top Housing helps contain the switch's internals while having an opening at the top to keep the stem steady as it moves up and down.
II. Stem juts out from the top of the switch and is what connects to the keycap. When you press a key, the stem is what travels up and down.
III. Spring is what rests underneath the stem, allowing it to bounce back up after being pressed.
IV. Contact Leaf gets moved by the switch's stem as you press down. When moved, metal-to-metal contact is formed that sends a signal to the keyboard through metal pins that stick out from the bottom of the switch.
V. Bottom Housing holds the contact leaf's metal pins in place. It may also have two additional plastic "pins