Stethoscope for cardiology department

The stethoscope for the cardiology department comprises a sound pick-up, a sound conducting catheter, a clamping fixing frame and a receiver, the sound pick-up is communicated with the clamping fixing frame through the sound conducting catheter, the sound pick-up comprises a sound pick-up base, a sound pick-up diaphragm and a connecting joint, an amplification closed cavity is formed in the lower end of the sound pick-up base, and the sound pick-up diaphragm is arranged in the amplification closed cavity. A connecting pipe is fixedly installed between the amplification closed cavity and the connecting joint, a blocking cavity is formed in the middle section of the connecting pipe, an extrusion inserting rod and an extrusion groove rod are inserted into the two sides of the middle section of the blocking cavity correspondingly, and the connecting pipe is extruded and closed by pressing the extrusion inserting rod and the extrusion groove rod, so that the amplification closed cavity and the connecting joint are