A quick-updating stethoscope receiver comprises a receiver, a listening
disk at a lower end of the receiver, the listening disk can be embedded
into a lower end of the receiver; an upper cover at a top end of the
receiver; and a transducer combining at a lateral wall of the receiver and
a connector at a rear end of the transducer. A lower end of the receiver
has an axial extended shaft. The shaft is formed with an annular trench.
An elastic tightening ring is embedded into the trench. A diameter of a
cross section of the tightening ring is larger than a depth of the trench
so that part of the tightening ring protrudes out of the trench. A center
of the round disk has an opening. By the elastic expanding force of the
tightening ring, the round disk is tightly engaged to the shaft so that
the round disk can not drop out.
