CN213883263U

CN213883263U - Doctor in paediatrics uses portable stethoscope

Info

Publication number: CN213883263U
Application number: CN202022410434.2U
Authority: CN
Inventors: 耿艳芳
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-27
Filing date: 2020-10-27
Publication date: 2021-08-06
Anticipated expiration: 2030-10-27

Abstract

The utility model provides a doctor in paediatrics uses portable stethoscope belongs to portable stethoscope technical field. This doctor paediatrics uses portable stethoscope includes listening piece, conduction piece and pickup piece. Listening spare includes first return bend, second return bend, earplug and sealed lid, the hose regulating box includes box body, hose tight pulley and motor, the box body set up in the hose tight pulley with the motor outside, the fixed cover of hose tight pulley connect in the motor output, the auscultation head rotate connect in box body outside one side, through the regulation cooperation between first return bend, second return bend and the sealed lid, the convenience is adjusted the use to the neck of co-altitude not, through the cooperation between box body inside motor and the hose tight pulley, is drawn into hose tight pulley surface with coupling hose when the stethoscope is idle, has made things convenient for the stethoscope to carry, has reduced and has hung easily to cause the tired problem of neck on doctor's neck for a long time.

Description

Doctor in paediatrics uses portable stethoscope

Technical Field

The utility model relates to a portable stethoscope technical field particularly, relates to a pediatrics doctor uses portable stethoscope.

Background

The stethoscope is the most commonly used diagnostic tool for internal and external gynecologists, is the mark of the physicians, and the modern medicine is the invention of the stethoscope. The stethoscope has been improved in appearance and sound transmission mode since its clinical application, but its basic structure is not changed much, and it is mainly composed of sound pickup portion, conduction portion and listening portion.

At present, the stethoscope adopted in the market is inconvenient to carry in use and is easy to cause neck fatigue after being hung on the neck of a doctor for a long time.

SUMMERY OF THE UTILITY MODEL

In order to compensate for the defects, the utility model provides a doctor uses portable stethoscope for pediatrics, aiming at improving the inconvenient carrying of hose in use and easily causing the fatigue problem of neck when hanging on the neck of doctor for a long time.

The utility model discloses a realize like this:

the utility model provides a doctor uses portable stethoscope, including listening piece, conduction piece and pickup piece.

The listening part comprises a first bent pipe, a second bent pipe, an earplug and a sealing cover, the first bent pipe is sleeved on the second bent pipe in a sliding mode, the earplug is fixedly connected to one end of the second bent pipe, the first bent pipe, the second bent pipe and the earplug are communicated with each other, the sealing cover is arranged at the joint of the first bent pipe and the second bent pipe, the top end of the sealing cover is fixedly connected to the second bent pipe, the sealing cover is sleeved on the first bent pipe in a threaded mode, the conducting part comprises a metal sound transmission cavity and a first connecting block, the metal sound transmission cavity is communicated with the interior of the first bent pipe, sound outlets are formed at the joint of the metal sound transmission cavity and the first bent pipe, the sound outlets are arranged in two numbers, the first bent pipe is arranged corresponding to the sound outlets, the first connecting block is fixedly connected to the bottom of the metal sound transmission cavity, and a sound inlet is formed at the bottom of the first connecting block, the sound inlet is communicated with the inside of the metal sound transmission cavity, the sound pickup piece comprises a stethoscope head, a connecting hose and a hose adjusting box, one end of the connecting hose is communicated with the sound inlet, the hose adjusting box comprises a box body, a hose fixing wheel and a motor, the box body is arranged at the outer sides of the hose fixed wheel and the motor, the motor is fixedly connected inside the box body, the hose fixing wheel is fixedly sleeved at the output end of the motor, a first cavity is arranged inside the hose fixing wheel, the top of the hose fixing wheel is provided with a hose fixing nozzle which is communicated with the first cavity, one end of the connecting hose is fixedly sleeved on the hose fixing nozzle, the hose fixing nozzle is communicated with the sound inlet through the connecting hose, the auscultation head is communicated with the first cavity, and the auscultation head is rotatably connected to one side of the outer portion of the box body.

In an embodiment of the present invention, a through hole is opened at the top of the sealing cover, and the second bent pipe passes through the through hole and is slidably connected to the first bent pipe.

In an embodiment of the present invention, the second elbow top is close to the earplug one end is provided with a first connecting rod, the first connecting rod is fixedly connected to the inner wall of one end of the second elbow, the first connecting rod is provided with a fixing ring at the joint of the second elbow, the fixing ring outer wall is fixedly connected to the inner wall of the second elbow, the first connecting rod is fixedly connected to the inner wall of the fixing ring, and the first connecting rod is communicated with the inside of the second elbow.

In an embodiment of the present invention, the first sleeve rod is slidably sleeved on one end of the first connecting rod, the bottom of the first sleeve rod is provided with a screw rod, the earplug thread is sleeved on the screw rod, the inside of the screw rod is provided with the second cavity, and the first sleeve rod is communicated with the inside of the screw rod.

The utility model discloses an in one embodiment, the earplug outside is provided with anti-skidding cushion, the inside screw thread chamber that is provided with in earplug bottom, screw thread chamber bottom is provided with the magnet piece, the magnet piece with the earplug corresponds the setting.

The utility model discloses an in an embodiment, the slider has been cup jointed in the slip of first return bend outside, the slider both sides are two hook face magic subsides of fixedly connected with respectively, two hook face magic subsides with first return bend corresponds the setting.

The utility model discloses an in one embodiment, the sound mouth inside is provided with the connecting pipe, connecting pipe outer wall fixed connection in first connecting block inner wall, connecting pipe one end with inside intercommunication of metal transaudient intracavity, the connecting pipe other end communicate in coupling hose.

The utility model discloses an in one embodiment, the box body outside with the auscultation head junction is provided with the second connecting block, logical groove has been seted up to second connecting block inside, the auscultation head bottom is passed logical groove with the box body intercommunication.

The utility model discloses an in one embodiment, the hose connector has been seted up to box body one side, connecting hose passes the fixed cover of hose connector connect in the fixed mouth of hose.

The utility model discloses an in one embodiment, first return bend respectively with sealed lid with metal transaudient chamber junction is provided with the sealing washer, the box body with stethoscope head intercommunication department is provided with the sealing washer, first loop bar with screw rod intercommunication department is provided with the sealing washer.

The utility model has the advantages that: the utility model discloses a doctor uses portable stethoscope that above-mentioned design obtained, during the use, through the cooperation between inside motor of box body and the hose tight pulley, be drawn into hose tight pulley surface with coupling hose when the stethoscope is idle, made things convenient for the stethoscope to carry, reduced hang for a long time and caused neck fatigue problem on doctor's neck easily.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of a portable stethoscope for pediatrics doctors according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a listening member according to an embodiment of the present invention;

fig. 3 is a schematic view of a slider structure according to an embodiment of the present invention;

fig. 4 is a schematic view of an earplug according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a sealing cover according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a fixing ring according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a conduction member provided by an embodiment of the present invention;

fig. 8 is a schematic structural view of a pickup according to an embodiment of the present invention;

fig. 9 is a schematic view of a through groove structure provided by the embodiment of the present invention.

In the figure: 200-a listening piece; 210-a first bend; 211-a slider; 220-a second bend; 230-an earplug; 231-non-slip soft pad; 232-magnet block; 233-thread cavity; 240-sealing cover; 241-a through hole; 250-a first link; 251-a fixing ring; 260-a first loop bar; 270-screw rod; 280-double hook surface magic tape; 300-a conductor; 310-a metallic sound transmission cavity; 320-a sound outlet; 330-sound inlet; 340-a first connection block; 341-connecting pipe; 400-a pick-up piece; 410-a stethoscope head; 420-connecting a hose; 430-hose regulating box; 431-a cartridge; 432-hose fixed wheels; 433-a motor; 434-hose fixing nozzle; 435-hose connection port; 450-a second connection block; 451-through groove.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Examples

Referring to fig. 1-9, the present invention provides a technical solution: a portable stethoscope for pediatrics doctors comprises listening pieces 200, conducting pieces 300 and sound pickup pieces 400, wherein the listening pieces 200 are used for conducting sounds which are worn by the stethoscope and transmitted to the conducting pieces 300 and the sound pickup pieces 400 to doctors, the conducting pieces 300 are used for communicating the listening pieces 200 with the sound pickup pieces 400 and conducting the sounds collected by the sound pickup pieces 400, and the sound pickup pieces 400 are used for observing the heartbeat frequency of patients so as to facilitate the doctors to observe the patients.

Referring to fig. 1-6, the listening element 200 includes a first curved tube 210, a second curved tube 220, an earplug 230, and a sealing cap 240, the first curved tube 210 is slidably sleeved on the second curved tube 220, the earplug 230 is fixedly connected to one end of the second curved tube 220, the first curved tube 210, the second curved tube 220 and the earplug 230 are communicated with each other for facilitating transmission of internal sound, the sealing cap 240 is disposed at a connection position between the first curved tube 210 and the second curved tube 220 for facilitating adjustment of connection lengths between the first curved tube 210 and the second curved tube 220 for facilitating use of people with different neck lengths, a top end of the sealing cap 240 is fixedly connected to the second curved tube 220, the sealing cap 240 is threadably sleeved on the first curved tube 210 for facilitating fixation of the sealing cap 240 and the first curved tube 210, a through hole 241 is formed at a top of the sealing cap 240 for facilitating adjustment of different positions of the sealing cap 240 on the second curved tube 220, the second curved tube 220 is slidably connected to the first curved tube 210 through the through hole 241, a top end of the second curved tube 220 near the earplug 230 is provided with a first connecting rod 250, the first connecting rod 250 is fixedly connected to the inner wall of one end of the second bent tube 220, a fixing ring 251 is arranged at the joint of the first connecting rod 250 and the second bent tube 220, the outer wall of the fixing ring 251 is fixedly connected to the inner wall of the second bent tube 220, the fixing ring 251 is fixedly connected to the inner wall of the second bent tube 220 by welding, the first connecting rod 250 is fixedly connected to the inner wall of the fixing ring 251 by welding, the first connecting rod 250 is communicated with the inside of the second bent tube 220, a sealing ring is arranged at the communication position between the first connecting rod 250 and the inside of the second bent tube 220 to ensure the air tightness of the communication position, a first sleeve 260 is slidably sleeved at one end of the first connecting rod 250, a sealing ring is arranged at the sleeving position between the first connecting rod 250 and the first sleeve 260 to ensure the air tightness of the communication position, a screw 270 is arranged at the bottom of the first sleeve 260, the earplug 230 is sleeved on the screw 270 in a threaded manner, a second cavity is arranged inside the screw 270 to facilitate internal sound conduction, the first sleeve rod 260 is communicated with the inside of the screw 270 to facilitate the first sleeve rod 260 to conduct sound into the screw 270, an anti-slip soft pad 231 is arranged outside the earplug 230, the anti-slip soft pad 231 is fixedly connected to the outside of the earplug 230 through adhesion to prevent the earplug 230 from slipping off when being worn, a threaded cavity 233 is arranged inside the bottom of the earplug 230, a magnet block 232 is arranged at the bottom of the threaded cavity 233 to facilitate fixing of two pairs of earplugs 230 when the earplug 230 is idle, the magnet block 232 is arranged corresponding to the earplug 230, a slider 211 is sleeved outside a first bent tube 210 in a sliding manner, a through hole is arranged inside the slider 211, the first bent tube 210 penetrates through the through hole to be slidably connected with the slider 211, the position of the slider 211 is conveniently adjusted, two sides of the slider 211 are respectively and fixedly connected with double hook magic tapes 280, the two sides of the slider 211 through adhesion, fix the stethoscope when conveniently wearing, reduce neck department pressure, two hook face magic subsides 280 correspond the setting with first return bend 210, and the convenience is fixed simultaneously to the stethoscope both sides.

Referring to fig. 1 and 7, the conductive member 300 includes a metal sound transmission cavity 310 and a first connection block 340, the metal sound transmission cavity 310 is communicated with the inside of the first bent pipe 210, a sealing ring is disposed at the communication position of the metal sound transmission cavity 310 and the first bent pipe 210 to ensure the air tightness of the connection position, two sound outlets 320 are disposed at the connection position of the metal sound transmission cavity 310 and the first bent pipe 210 to facilitate simultaneous sound output at two sides, the first bent pipe 210 and the sound outlets 320 are correspondingly disposed, the first connection block 340 is fixedly connected to the bottom of the metal sound transmission cavity 310 by welding, a sound inlet 330 is disposed at the bottom of the first connection block 340 to facilitate sound input, the sound inlet 330 is communicated with the inside of the metal sound transmission cavity 310, the sealing ring is disposed at the communication position of the sound inlet 330 and the metal sound transmission cavity 310 to ensure the air tightness of the connection position, a connection pipe 341 is disposed inside the sound inlet 330, make things convenient for sound to pass into metal sound transmission chamber 310 through connecting tube 341, connecting tube 341 outer wall fixed connection in first connecting block 340 inner wall, connecting tube 341 outer wall through riveting fixed connection in first connecting block 340 inner wall, connecting tube 341 one end and the inside intercommunication in metal sound transmission chamber 310, the connecting tube 341 other end communicates in coupling hose 420, and connecting tube 341 and coupling hose 420 junction have the snap ring fixed.

Referring to fig. 1, 8 and 9, the sound pickup device 400 includes a stethoscope head 410, a connection hose 420 and a hose adjusting box 430, one end of the connection hose 420 is communicated with the sound inlet 330, the hose adjusting box 430 includes a box body 431, a hose fixing wheel 432 and a motor 433, the box body 431 is disposed outside the hose fixing wheel 432 and the motor 433 to prevent external dust from damaging the motor 433, the motor 433 is fixedly connected inside the box body 431 by a bolt, the hose fixing wheel 432 is fixedly sleeved at an output end of the motor 433 by a snap ring, a first cavity is disposed inside the hose fixing wheel 432 to facilitate sound conduction, a hose fixing nozzle 434 is disposed at the top of the hose fixing wheel 432, the outside of the hose fixing nozzle 434 is fixedly connected to the top of the hose fixing wheel 432 by welding, the hose fixing nozzle 434 is communicated with the first cavity, the portable stethoscope head is characterized in that a hose fixing nozzle 434 is convenient to output sound, one end of a connecting hose 420 is fixedly sleeved on the hose fixing nozzle 434, a clamping ring is arranged at the joint of the connecting hose 420 and the hose fixing nozzle 434 for fixing, the hose fixing nozzle 434 is communicated with a sound inlet 330 through the connecting hose 420, the stethoscope head 410 is communicated with a first cavity, the head 410 is convenient to input the top sound, the stethoscope head 410 is rotatably connected to one side of the outer part of a box body 431, a second connecting block 450 is arranged at the joint of the outer side of the box body 431 and the stethoscope head 410, the second connecting block 450 is fixedly connected to the outer side of the box body 431 through welding, a through groove 451 is formed in the second connecting block 450, the stethoscope head 410 is convenient to communicate with the box body 431, the bottom of the stethoscope head 410 passes through the through groove 451 to communicate with the box body 431, the bottom of the stethoscope head 410 is fixedly connected with one side of the box body 431 through welding, a hose connecting port 435 is formed in one side of the box body 431, and the hose 420 is convenient to connect with the hose fixing nozzle 434, the connection hose 420 penetrates through the hose connector 435 to be fixedly sleeved on the hose fixing nozzle 434, the first elbow 210 is provided with a sealing ring at the joint of the sealing cover 240 and the metal sound transmission cavity 310, the box body 431 is provided with a sealing ring at the joint of the box body 410 and the stethoscope head, and the first sleeve rod 260 is provided with a sealing ring at the joint of the screw 270, so that the overall air tightness of the stethoscope is ensured.

Specifically, this doctor for paediatrics uses portable stethoscope's theory of operation: during the use, through the cooperation between inside motor 433 of box body 431 and the hose tight pulley 432, be drawn into hose tight pulley 432 surface with coupling hose 420 when the stethoscope is idle, made things convenient for the stethoscope to carry, reduced and hung for a long time and caused the tired problem of neck easily on doctor's neck.

It should be noted that the specific model specifications of the motor 433 and the auscultation head 410 need to be determined by type selection according to the actual specification of the device, and the specific type selection calculation method adopts the prior art in the field, so detailed description is omitted.

The power supply of the motor 433 and its principle will be clear to a person skilled in the art and will not be described in detail here.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A portable stethoscope for pediatrics doctors is characterized by comprising

The hearing aid (200) comprises a first bent pipe (210), a second bent pipe (220), an earplug (230) and a sealing cover (240), wherein the first bent pipe (210) is sleeved on the second bent pipe (220) in a sliding manner, the earplug (230) is fixedly connected to one end of the second bent pipe (220), the first bent pipe (210), the second bent pipe (220) and the earplug (230) are communicated with each other, the sealing cover (240) is arranged at the joint of the first bent pipe (210) and the second bent pipe (220), the top end of the sealing cover (240) is fixedly connected to the second bent pipe (220), and the sealing cover (240) is sleeved on the first bent pipe (210) in a threaded manner;

the conductive part (300), the conductive part (300) includes a metal sound transmission cavity (310) and a first connecting block (340), the metal sound transmission cavity (310) is communicated with the inside of the first bent pipe (210), a sound outlet (320) is arranged at the joint of the metal sound transmission cavity (310) and the first bent pipe (210), the number of the sound outlet (320) is two, the first bent pipe (210) is arranged corresponding to the sound outlet (320), the first connecting block (340) is fixedly connected to the bottom of the metal sound transmission cavity (310), a sound inlet (330) is arranged at the bottom of the first connecting block (340), and the sound inlet (330) is communicated with the inside of the metal sound transmission cavity (310);

pickup part (400), pickup part (400) includes auscultation head (410), coupling hose (420) and hose adjusting box (430), coupling hose (420) one end communicate in go into sound mouth (330), hose adjusting box (430) includes box body (431), hose tight pulley (432) and motor (433), box body (431) set up in hose tight pulley (432) with motor (433) outside, motor (433) fixed connection in inside box body (431), hose tight pulley (432) fixed cup joint in motor (433) output, hose tight pulley (432) inside is provided with first cavity, hose tight pulley (432) top is provided with hose fixed mouth (434), hose fixed mouth (434) with first cavity intercommunication, coupling hose (420) one end connect in hose fixed mouth (434), the hose fixing nozzle (434) is communicated with the sound inlet (330) through the connecting hose (420), the auscultation head (410) is communicated with the first cavity, and the auscultation head (410) is rotatably connected to one side of the outer part of the box body (431).

2. The portable stethoscope for pediatrics doctor as claimed in claim 1, wherein a through hole (241) is opened at a top of the sealing cover (240), and the second bending tube (220) is slidably connected to the first bending tube (210) through the through hole (241).

3. The portable stethoscope for pediatrics doctor as claimed in claim 1, wherein a first connecting rod (250) is disposed at a top of the second bending tube (220) near one end of the earplug (230), the first connecting rod (250) is fixedly connected to an inner wall of one end of the second bending tube (220), a fixing ring (251) is disposed at a connection position of the first connecting rod (250) and the second bending tube (220), an outer wall of the fixing ring (251) is fixedly connected to an inner wall of the second bending tube (220), the first connecting rod (250) is fixedly connected to an inner wall of the fixing ring (251), and the first connecting rod (250) is communicated with an interior of the second bending tube (220).

4. The portable stethoscope for pediatrics doctor as claimed in claim 3, wherein a first sleeve rod (260) is slidably sleeved at one end of the first connecting rod (250), a screw rod (270) is disposed at a bottom of the first sleeve rod (260), the earplug (230) is threadedly sleeved on the screw rod (270), a second cavity is disposed inside the screw rod (270), and the first sleeve rod (260) is communicated with the inside of the screw rod (270).

5. The portable stethoscope for pediatrics doctor as claimed in claim 1, wherein the earplug (230) is externally provided with a non-slip cushion (231), the earplug (230) is internally provided with a threaded cavity (233) at the bottom, the threaded cavity (233) is provided with a magnet block (232) at the bottom, and the magnet block (232) is arranged corresponding to the earplug (230).

6. The portable stethoscope for pediatrics doctor as claimed in claim 1, wherein a sliding block (211) is slidably sleeved outside the first bending tube (210), two sides of the sliding block (211) are fixedly connected with a double hook magic tape (280), and the double hook magic tape (280) is disposed corresponding to the first bending tube (210).

7. The portable stethoscope for pediatrics doctor as claimed in claim 1, wherein a connecting tube (341) is disposed inside the sound inlet (330), an outer wall of the connecting tube (341) is fixedly connected to an inner wall of the first connecting block (340), one end of the connecting tube (341) is communicated with the inside of the metal sound transmission cavity (310), and the other end of the connecting tube (341) is communicated with the connecting hose (420).

8. The pediatrics doctor portable stethoscope according to claim 7, wherein a second connecting block (450) is arranged at a position where the box body (431) is connected with the stethoscope head (410), a through groove (451) is formed in the second connecting block (450), and the bottom of the stethoscope head (410) passes through the through groove (451) and is communicated with the box body (431).

9. The stethoscope for pediatrics doctor as claimed in claim 1, wherein a hose connection port (435) is formed at one side of the box body (431), and the connection hose (420) is fixedly connected to the hose fixing nozzle (434) through the hose connection port (435).

10. The portable stethoscope for pediatrics doctor as claimed in claim 4, wherein the first elbow (210) is provided with a sealing ring at the joint of the sealing cover (240) and the metal sound transmission cavity (310), the box body (431) is provided with a sealing ring at the joint of the box body and the stethoscope head (410), and the first sleeve rod (260) is provided with a sealing ring at the joint of the first sleeve rod and the screw rod (270).