Patent ID: 6523639
Filing Date: 2003-02-25
Classification: A61B

Abstract:
A receiver structure of stethoscope, comprising a receiver body, a double-hoop frame, and a membrane, in whicha sound-pickup cambered surface of said receiver body has a hole interconnected to a sound-pickup duct outside said receiver body, and a groove is formed in the outer periphery of said cambered surface for snap-fastening and assembling said double-hoop frame; said double-hoop frame is comprised of an outer hoop and an inner hoop supported by at least two links, in which a gap is formed between the outer hoop and at least those two links for clamping and fixing the rim of said membrane; said membrane is correspondent with the outer hoop of said double-hoop frame in shape, and the rim of said membrane is larger than an inner edge of the outer hoop, so that the membrane can be glazed in the gap between the outer hoop and at least those two links; and when using a stethoscope of this kind, a large cavity for sound pickup is formed and enclosed by the cambered surface, the outer hoop of the double-hoop frame, and the membrane, so that a user is enabled to hear low-frequency sound via the pickup duct; or, when the user depresses the receiver body harder, the membrane would be deformed inwardly to hence confront against the inner hoop of the double-hoop frame, and at this time, a small cavity is enclosed by the cambered surface, the inner hoop, and the membrane to enable the user to hear high-frequency sound.