Perhaps this is a bit more of a mechanical question then electronic, I hope it is not off topic. We have all seen the many electronics that use a barrel style DC power connector (I guess sometimes called Coaxial). I am wondering if there is a device that can retrofit this connector to make it a locking connector or to better lock it in place.
Specifically, I am hoping to find something other than locking down the cable itself, such as via a plastic loop affixed to the back of the chassis. That works ok but for my purposes I was hoping more for something that would literally lock the barrel connector into its socket. And again, I am hoping to retrofit existing devices, rather than cut cables / drill new holes.
Perhaps something that increases the friction already holding the barrel in place, such as some sort of small wedge or ring? Does such a thing exist?