| 摘要 |
A stethoscope includes a tubing having a first end to which an adapter is releasably mounted and second ends to which a pair of binaurals are mounted and a plurality of chest pieces selectively and interchangeably connected to the adapter. Each of the chest pieces has a tubular portion with a sound channel formed therein. The chest piece has formed on the tubular portion a guiding slot extending axially and a holding slot extending circumferentially and in connection with the guiding slot. The tubular portion of the chest piece has a deep recess formed on the holding slot. The adapter has a bore to receive the tubular portion of the chest piece therein. The bore has a radially extending hole within which a spherical member is movably received and biased by a spring to partially project into the bore so that in inserting the tubular portion of the chest piece into the bore, the spherical member is positioned in and guided by the guiding slot and the holding slot to reach the deep recess and be securely held therein and thus releasably securing the chest piece to the adapter.
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