Ice Lock ++

thingiverse

Slightly Enhanced Ice-based Timed Lock. Compared to its predecessor, this model boasts several key improvements: * Internal Expansion Ribs Minimize Strain as Water Freezes * A Thicker Key with External Ribs Provides Better Ice Retention * Reduced Overhangs and No Bridges Simplify Printing * Flat-Bottomed Internal Cavity Reduces Leaks from Slicer-Created Geometry Freeze the pin within the body, and at room temperature, it will take approximately 2-3 hours for the ice to melt sufficiently, allowing the pin to be released. This design serves as a reliable alternative to constructing an electromechanical timed lock, offering greater dependability since you won't need to store it in a freezer :P