Thanks.
I'm using rubber bands, couldn't find extension springs that were small enough when the screen is up, and able to extend far enough when closed.
View attachment 784030View attachment 784029
Battery is an A23. I like your rechargeable idea though.
This battery holder: https://www.digikey.com/product-detail/en/mpd-memory-protection-devices/BH23AW/BH23AW-ND/2439315
Will fit in the rectangular spot near the bottom.
View attachment 784028
The right button pushes backwards to release the screen to pop-up. The left button moves the same way, but it is intended to be used with a tactile button to cycle modes on an arduino, but that's a ways down the road. Here's a cross section to show the latch mechanism to release the screen:
View attachment 784031
It isn't screen accurate (you can see the top half of the back when they're scanning the bible in "The Krill") but it will be functional and not really visible.
You've done a nice job on modelling and factoring in lighting to your scanner.
As propmaster2000 said, a nice simple approach to the pop-up mechanism, using the elastic bands.
I would maybe be a tad concerned that the tension force on the body of the prop exerted by the stretch of the bands may cause the shell of the prop to warp over time.