The 'Stable Plug' uses a Retractable Prong to Protect Your Plug

 - Jul 20, 2013
References: idsa.org & yankodesign
The Stable Plug by designer Liquan Li has a simple function that helps your plugs last longer. The concept plug design has a special modification that keeps it firmly connected to your wall socket even if there's tugging on the cable.

The innovative plug works by using a central retractable prong. When you plug your device in, all you have to do is extend the prong to keep everything stable.

Since plugs naturally degrade over time through constant movement, keeping them stable means that your plugs will last longer. The slow degradation of your plugs causes them to fit less snugly. As a result, they come out of the socket easily after heavy use. With the Stable Plug, your plugs will stay structurally sound so that you don't accidentally unplug your devices.