7 Pin Trailer Connection falling out of TV outlet

As others said, make sure the lip is catching securely and the spring on the flap is intact. As an extra measure of security, I take a 2" section of bicycle inner tube and slide over the connector. Once the connection is plugged in, I work the inner tube up and over the flap door to hold it in place and provide a little protection from read dirt and water. Hasn't come loose yet.