An "automatic lock" is a mechanism that locks something, like a door or a device, without needing manual effort. It locks by itself when a certain condition is met, such as when the door is closed or when a timer runs out. Full definition
The one - hand fold with automatic lock feature takes some time to learn, may not be easy for those who are not used to tandem strollers. (hifivebaby.com)
On four - wheel - drive models, automatic locking hubs are now standard; manual locking hubs are optional. (articles.orlandosentinel.com)
With automatic lock system after fold the stroller turns to a compact size, which is very easy to keep at your home & easy to handle. (bestbabydollstrollerreviews.com)