Trip wire alarm

thingiverse

This lock secures patio umbrellas in place, preventing them from spinning around when tilted to block sunlight. It's specifically designed for 37mm umbrella poles and may also work on poles measuring between 36-38 millimeters, although this hasn't been thoroughly tested. If you've found this solution helpful, consider donating an amount of your choice through paypal.me to support the time invested in its design.