Patent ID: 7552491

Claim:
A lying surface for a bed, the lying surface comprising: support elements ( 22 ) and at least one electro-mechanic lifting unit ( 20 ) for lifting and lowering one of the support elements ( 22 ) relative to a bearing element ( 62 ) of the support element ( 22 ), wherein the at least one lifting unit ( 20 ) comprises a housing ( 24 ) with an electromotor ( 32 ) having a drive shaft ( 34 ), a transmission ( 38 ) and a lifting member ( 50 ) supported at the bearing element ( 62 ) of said one support element ( 22 ), the lifting member ( 50 ) is adapted to be rotated by the transmission ( 38 ) and to be moved both up and down during a rotary movement of 360°, and the lifting member ( 50 ) has a disc element ( 82 ) oriented under an acute angle to a rotational axis ( 86 ) of the lifting member ( 50 ) and supported at a counter bevel surface ( 88 ) of the lifting member ( 50 ), the disc element ( 82 ) and the counter bevel surface ( 88 ) being oriented under the same acute angle to the rotational axis ( 86 ) of the lifting member ( 50 ).