Patent ID: 7540042

Claim:
A sitting and sleeping furniture, comprising: a back ( 10 ) having a top and a bottom; a sitting and sleeping platform ( 13 ); a plurality of back columns ( 2 ); a back column cross frame ( 5 ); a plurality of sitting and sleeping platform frames ( 14 ); a parallel mechanism for moving said bottom of said back ( 10 ) toward and away from said back columns ( 2 ), said parallel mechanism comprising a plurality of supporting arms and a supporting arm controller; and a synchronous lifting mechanism for moving said top of said back ( 10 ) up and down alongside said back columns ( 2 ), said synchronous lifting mechanism connects said top of said back ( 10 ) to said back columns ( 2 ); wherein said back columns ( 2 ) are connected with said back column cross frame ( 5 ) whereby forming a back column framework; said sitting and sleeping platform frames ( 14 ) are connected with said back column framework whereby forming a sitting and sleeping platform skeleton; said parallel mechanism is set below said back and above said sitting and sleeping platform ( 13 ); said synchronous lifting mechanism is adapted to cooperate with said parallel mechanism to keep said top of said back at a constant distance with respect to said bottom of said back; and said synchronous lifting mechanism is disposed at said top of said back ( 10 ).