SJ4000 to 37 mm adapter

### Waiting for fix
**I realized that this work is heavily influenced by my previous machine and can't be printed normally by most popular printers after I have an Ender-3 V2. I will fix the models if I could have some spare time.**

I replaced an 110° and 3.8 mm distortion free lens for my sj4000, and now it's not match the waterproof case! Time to install an UV filter.

1. Print both parts.
2. Clear fluff, carefully.
3. Clear threads, be sure two parts could be screwed smoothly.
4. Scr