Patent 7735171 was granted and assigned to Apex Medical Corp on June, 2010 by the United States Patent and Trademark Office.
A support structure includes a mattress, a bottom sheet, at least one side guard and at least one positioning assembly. The mattress has a plurality of bladders. The side guard is disposed on any one lateral side of the top surface of the mattress. The positioning assembly can fix the side guard to the mattress. The side guard can protect two sides of a bedded person and prevent the bedded person from falling from the mattress. When the side guard is pushed by an external force, the bedded person does not fall into the vertical gap.