US Patent 10188217 Collapsible bed foundation

Provided is a mattress foundation that includes: a headboard end panel assembly, a footboard end panel assembly, a left side panel assembly, and a right side panel assembly, each having a first end and a second end. The first end of the left side panel assembly slidably engages with the first end of the headboard end panel assembly, thereby forming a first corner attachment. The second end of the left side panel assembly slidably engages with the first end of the footboard end panel assembly, thereby forming a second corner attachment. The first end of the right side panel assembly slidably engages with the second end of the headboard end panel assembly, thereby forming a third corner attachment. The second end of the right side panel assembly slidably engages with the second end of the footboard end panel assembly, thereby forming a fourth corner attachment.