Patent ID: 6052852
Filing Date: 2000-04-25
Classification: A47C,Y10S

Abstract:
A human back mattress for placing on a bed to additionally support a back of a user while limbs of the user remaining lying on the bed, wherein said mattress comprises:an upholstered seat made of elastic material and defined an accommodating space therein, wherein said accommodating space divides into a front half and a rear half, said upholstered seat having a top surface forming a flat lying surface and a bottom surface forming a supporting plane for evenly contracting with the bed when said mattress is placed on the bed, wherein said flat lying surface has a size adapted for merely supporting the back of the user, a front stretcher and a rear stretcher respectively protruded and extended upwardly at a front end and a rear end of said flat laying surface for stopping a neck and an end of a spinal column of the user from being slipping off;a plurality of magnetic stones, which are disposed on said flat lying surface of said upholstered seat, each having a kneading part on a top periphery thereof;an upholstery covering said upholstered seat in a manner that said magnetic stones are disposed between said upholstery and said flat lying surface of said upholstered seat;a first set of springs comprising a plurality of first springs which are uniformly affixed in said front half of said accommodating space of said upholstered seat and arranged to have an equal elasticity, wherein directions of compression and stretching of each of said fist springs are maintained perpendicular to said flat lying surface and said supporting plane, and that top peripheries of every two of said first springs are engaged together by means of a first linking element; anda second set of springs comprising a plurality of second springs which are uniformly affixed in said rear half of said accommodating space of said upholstered seat, wherein each of said second springs is arranged to have a second elasticity greater than said elasticity of said first springs, moreover each of said second springs is more elastic and less compressible in comparison with said first springs, wherein directions of compression and stretching of each of said second springs are maintained perpendicular to said flat lying surface and said supporting plane, and that top peripheries of every two of said second springs are engaged together by means of a second linking element, whereby by means of said different elasticity between said first and second sets of springs, said flat lying surface of said upholstered seat is adapted for fitting correspondingly against a radius of curvature of the back of the user so that supporting forces reached at various area of the back are uniformly the same, moreover under a pressing force exerted by the user, said kneading parts of said magnetic stones apply relatively an upward force against the back of the user to achieve a massage effect.