very thin laptop camera sliding cover.
The "thing" include 3 parts:
rails plate
cover
rails end blocker

Print the plate on its back, rails upwards, no support needed.
You might need to gently (!) send paper the slider as tolerances are quite tight. It's thin, it will take a few seconds if at all.

mount the device on my laptop with dual side thin tape or two drops of UHU glue.

Enjoy!

Creality

Ender 3

No

No

My setup was 205 deg on the tip, 55 deg on the plate, 50mm/sec print speed