Mattress spring system comprises spiral springs mounted between annular plates at top and bottom and connector strips between top plates to maintain required spacing which have split pins at each end which fit into holes in rims of plates

摘要

The mattress spring system (1) is made up of spiral springs (2) mounted between annular plates at the top and bottom. Connector strips (6) are fitted between the top plates to maintain the required spacing. These have split pins at each end which fit into holes in the rims of the plates.