Khóa Quick Release tích hợp Còi (Quick Release Whistle Buckle)

You can replace a standard quick release buckle with this one in order to have a built-in safety whistle. Can be printed at smaller sizes, but this is untested. Designed to be printed without supports. The whistle portion is based on the “Emergency & Sports Whistle” originally created by Scarlet_Engineering. It's not a perfect whistle, but it works for non-emergencies. You may need to adjust where your layer lines fall in order to maintain your whistle's tone.

I've printed these buckles with a 1.2mm shell and 0% infill at 60mm/s speed on an Ender 3 S1. You can probably print much faster than that on a more advanced printer! 

There are some vertical lines on the front and back of the whistle portion that may be fixable with a different slicer or print settings.