BED FOR A PATIENT, WITH PIEZOELECTRIC FORCE MEASURING PROBE

摘要

1. A bed for a patient, comprising a lower part (1), an upper part (20) arranged upon the lower part, and a force signal generator (6) arranged therebetween and having a first piezoelectric disc (33) connected to a charge amplifier (40), upon which the upper part (20) is mechanically supported through a prop (35) serving as a coupling element, and having a second piezoelectric disc (34) serving as a compensation element, arranged in a housing-like recess in the lower part (1), characterised in that the piezoelectric discs (33, 34) and the charge amplifier (40) are accommodated in a common closed metal housing (30) which is arranged in the lower part (1) of the bed, that the first piezoelectric disc (33) is arranged between the base of the housing (30) and the prop (35), that the housing (30) has an opening through which a conical surface of the prop (35) projects outwards, and that the opening in the housing is sealed so as to be impervious to liquids by means of an elastic sleeve in the form of a thin membrane (39), which rests slackly on the prop (35).