Rubber tube for stethoscope and structure for fitting the rubber tube with ear-hung pieces

1 . A combined structure of a rubber tube for a stethoscope and ear hooks, wherein the rubber tube comprises a rubber tube channel running through each end portion of the rubber tube, grooves are formed in a channel wall of the rubber tube channel, the rubber tube comprises ear-hook tubes and a stethoscope-head tube which are connected to each other, the rubber tube channel comprises channels of ear-hook tubes and a channel of the stethoscope-head tube that communicates with the channels of the ear-hook tubes, and the grooves are arranged in inner walls at the bottom of the ear-hook tubes and communicate with the channel of the stethoscope-head tube, the ear hooks comprise a left ear tube, a right ear tube and an elastic sheet connecting the left ear tube and the right ear tube; an end of the left ear tube towards the elastic sheet, an end of the right ear tube towards the elastic sheet and the elastic sheet are disposed within the channel of the rubber tube, so that the end of the left ear tube towards the elastic sheet and the end of the right ear tube towards the elastic sheet tightly fit with the inner walls of the ear-hook tubes; and when the left ear tube and the right ear tube are forced away from each other and thus a lower surface of the elastic sheet presses against the inner bottom walls of the ear-hook tubes, the channel of the stethoscope-head tube communicates with the channels of the ear-hook tubes through the grooves.

2 . The combined structure of a rubber tube for a stethoscope and ear hooks according to claim 1 , wherein at least two channels, which are intersected and communicate with each other, are provided in each of the ear-hook tubes, wherein an annular inner wall of the ear-hook tube constitutes the rubber tube channel, and a bottom side and side walls of the groove together define a groove channel.

3 . The combined structure of a rubber tube for a stethoscope and ear hooks according to claim 1 , wherein a first convex rib is provided on an inner bottom surface of a U-shaped portion of the rubber tube.

4 . The combined structure of a rubber tube for a stethoscope and ear hooks according to claim 1 , wherein second convex ribs are provided on an outer bottom surface of the U-shaped portion of the rubber tube at both sides of the U-shaped portion.

5 . A combined structure of a rubber tube for a stethoscope and ear hooks, wherein the rubber tube comprises a rubber tube channel running through each end portion of the rubber tube, grooves are formed in a channel wall of the rubber tube channel, the rubber tube comprises ear-hook tubes and a stethoscope-head tube which are connected to each other, the rubber tube channel comprises channels of ear-hook tubes and a channel of the stethoscope-head tube that communicates with the channels of the ear-hook tubes, and the grooves are arranged in inner walls at the bottom of the ear-hook tubes and communicate with the channel of the stethoscope-head tube, the ear hooks comprise a left ear tube, a right ear tube and an elastic sheet connecting the left ear tube and the right ear tube; an end of the left ear tube towards the elastic sheet, an end of the right ear tube towards the elastic sheet and the elastic sheet are disposed within the channel of the rubber tube, so that the end of the left ear tube towards the elastic sheet and the end of the right ear tube towards the elastic sheet tightly fit with the inner walls of the ear-hook tubes; the structure further comprises a T-shaped connector which is provided with a three-way channel running through wings and a lower part of the T-shaped connector; the wings of the T-shaped connector are embedded in the grooves, and the three-way channel communicates with the grooves; the connector is located below the elastic sheet, so that when the left and right ear tubes are forced away from each other and thus the lower surface of the elastic sheet presses against the top surface of the connector, the channel of the stethoscope-head tube communicates with the channels of the ear-hook tubes through the three-way channel of the connector and the grooves.

6 . The combined structure of a rubber tube for a stethoscope and ear hooks according to claim 5 , wherein a horizontal part of the T-shaped connector has a width no larger than that of the elastic sheet.

7 . The combined structure of a rubber tube for a stethoscope and ear hooks according to claim 5 , wherein at least two channels, which are intersected and communicate with each other, are provided in each of the ear-hook tubes, wherein an annular inner wall of the ear-hook tube constitutes the rubber tube channel, and a bottom side and side walls of the groove together define a groove channel.

8 . The combined structure of a rubber tube for a stethoscope and ear hooks according to claim 5 , wherein a first convex rib is provided on an inner bottom surface of a U-shaped portion of the rubber tube.

9 . The combined structure of a rubber tube for a stethoscope and ear hooks according to claim 5 , wherein second convex ribs are provided on an outer bottom surface of the U-shaped portion of the rubber tube at both sides of the U-shaped portion.