Mattress

Abstract

A mattress including a mattress core (1) having a plurality of elastically compressible core elements (5, 6) of which at least some are adjustable in respect of the hardness thereof. The core elements (6), which are adjustable in respect of the hardness thereof, have an upper support part (7) having an upper support surface (8), a lower support part (9) having a lower support surface (10) and at least one pretensioned spring (23, 24), by the pretension force of which the upper and the lower support parts (7, 9) are held at a distance from one another. The pretension force of the springs (23, 24) is adjustable.

1 . A mattress, comprising:
 a mattress core which has a plurality of elastically compressible core elements   at least some of the elastically compressible core elements are adjustable in their hardness,   the core elements which are adjustable in their hardness have an upper support part with an upper support surface, a lower support part with a lower support surface and at least one pretensioned spring,   wherein the at least one pretensioned spring generates a pretensioning force by which the upper and lower support parts are held at a mutual distance, and   the pretensioning force of the at least one pretensioned spring is adjustable.   
     
     
         2 . The mattress as claimed in  claim 1 , further comprising at least one device that limits a maximum distance between the upper support part and the lower support part. 
     
     
         3 . The mattress as claimed in  claim 1 , further comprising at least one oblique rod- or plate-shaped connecting part which, at an upper end thereof, is mounted pivotably on the upper support part and, at a lower end thereof, is supported on a supporting surface, on which the lower end is mounted displaceably in a sliding or rolling manner, or which, at the lower end, is mounted pivotably on the lower support part and, at the upper end, is supported on a supporting surface, along which the upper end is mounted displaceably in a sliding or rolling manner, and the spring acts on the connecting part or on a part connected thereto. 
     
     
         4 . The mattress as claimed in  claim 3 , wherein in an unloaded state of the mattress, the spring pulls the connecting part against a stop delimiting the supporting surface. 
     
     
         5 . The mattress as claimed in  claim 4 , wherein in the unloaded state, the connecting part encloses an angle within a range of between 10° and 40° with vertical. 
     
     
         6 . The mattress as claimed in  claim 3 , wherein the at least one oblique rod- or plate-shaped connecting part comprises first and second rod- or plate-shaped connecting parts which are inclined in opposite directions and are acted upon by the at least one pretensioned spring and which are each mounted pivotably at the upper ends thereof on the upper support part and are supported at the lower ends thereof on a respective supporting surface, on which the respective lower end is mounted displaceably in a sliding or rolling manner, or which are each mounted pivotably at the lower ends thereof on the lower support part and are supported at the upper ends thereof on a respective supporting surface, along which the respective upper end is mounted displaceably in a sliding or rolling manner. 
     
     
         7 . The mattress as claimed in  claim 1 , further comprising a motorized adjustment element for adjusting the pretensioning of the at least one spring. 
     
     
         8 . The mattress as claimed in  claim 7  wherein, the adjustment element comprises an electric motor or an electric cylinder which is connected to one end of the at least one spring. 
     
     
         9 . The mattress as claimed in  claim 7 , further comprising a manually actuable adjustment element for adjusting the pretensioning of the at least one spring. 
     
     
         10 . The mattress as claimed in  claim 1 , wherein the upper and lower support surfaces of the upper and lower support parts of a respective one of the adjustable core elements extends over an entire width of the mattress core. 
     
     
         11 . The mattress as claimed in  claim 1 , wherein the upper and the lower supporting parts are rigid.