Stethoscope for clinical teaching

Abstract

The invention discloses a stethoscope for clinical teaching, and particularly relates to the technology of medical supplies, the stethoscope comprises a first rubber tube, the front part of the left side of an inner cavity of the first rubber tube is sleeved and connected with a tuning mechanism, the front part of the right side of the inner cavity of the first rubber tube is sleeved and connected with a listening group, and the front side of the tuning mechanism is sleeved and connected with a third rubber tube; the front side of an inner cavity of the third rubber tube is connected with a handheld set in a sleeved mode, and the front end of the handheld set is fixedly connected with a pickup set. According to the stethoscope for clinical teaching, through cooperation of the listening set, the tuning mechanism, the handheld set, the pickup set, the first rubber tube and the third rubber tube, the stethoscope has two use modes, more details can be captured through the probe handle, the first diaphragm, the first probe and the second probe, the first rubber tube and the listening set, and the stethoscope is convenient to use. Through the second control part, the first control part, the miniature microphone and the loudspeaker, real-time audios are transmitted to equipment such as an earphone or a smart phone, analysis and diagnosis of a user are facilitated, and use is more flexible and convenient.

Description

Technical Field

[0001] The invention relates to the technical field of medical supplies, and in particular to a stethoscope for clinical teaching. Background Art

[0002] Clinical teaching is an important part of medical education, which aims to help medical students and other medical staff transform theoretical knowledge into practical skills and cultivate their clinical judgment and problem-solving abilities. In clinical teaching, the stethoscope is one of the basic tools commonly used by medical students and clinicians. It is used to listen to the sounds of the patient's heart, lungs, abdomen and other organs to assist in diagnosis. It amplifies the sounds in the human body so that medical staff can identify different physiological and pathological sounds, such as heart sounds, lung sounds, bowel sounds, etc. The use of the stethoscope is crucial to medical education and can help students become familiar with and master the basic skills of physical examination. The use of the stethoscope in clinical teaching mainly includes two aspects: one is to listen to and analyze normal and abnormal sounds, and the other is to cultivate students' observation and sensitivity through practical operations. Teachers guide students to use the stethoscope correctly and help them understand how to make a diagnosis based on the results of auscultation. With the advancement of science and technology, modern stethoscopes are also equipped with electronic functions, such as sound amplification and noise filtering, which further improve the accuracy and convenience of clinical auscultation. Through continuous practice and application, students can gradually master auscultation skills and improve their clinical judgment ability.

[0003] Chinese patent announcement number CN210330600U discloses a clinical teaching stethoscope, including a device body, a first earpiece is arranged at the upper end of the device body, a first earplug is arranged on the inner side of the first earpiece, a sealing hole is arranged on the outer side of the device body, a sound transmission tube is installed on the outer side of the device body, a second earpiece is arranged at the upper end of the sound transmission tube, a second earplug is installed on the inner side of the second earpiece, and a loudspeaker is arranged on the outer side of the connecting sleeve. The above device has a reasonable structure and effectively solves the problems in medical teaching. The tuning knob adjusts the volume, and the patient's heartbeat and chest echo are transmitted from the loudspeaker. The teacher can tell the students how to distinguish them when teaching, and can communicate with the students synchronously. There are two sealing holes in total, which is convenient for multiple doctors to hear the sound of the lesion more accurately. The first earplug can be removed and replaced from the built-in card block to avoid internal bacterial infection caused by multiple people using it; however, the following defects still exist in the implementation process: During the implementation of the above patent document, although it is convenient for multiple doctors to hear the sound of the lesion more accurately and avoid internal bacterial infection caused by multiple people using it, there is a problem that the device is not convenient for capturing subtle sounds, which affects the user's diagnosis. Summary of the invention

[0004] The main purpose of the present invention is to provide a stethoscope for clinical teaching, which can effectively solve the problem that the device is not convenient for capturing subtle sounds, thus affecting the user's diagnosis.

[0005] To achieve the above object, the technical solution adopted by the present invention is: A stethoscope for clinical teaching comprises a rubber tube 1, a tuning mechanism is sleeved and connected to the front left side of the inner cavity of the rubber tube 1, a listening group is sleeved and connected to the front right side of the inner cavity of the rubber tube 1, a rubber tube 3 is sleeved and connected to the front side of the tuning mechanism, a hand-held group is sleeved and connected to the front side of the inner cavity of the rubber tube 3, and a sound pickup group is fixedly connected to the front end of the hand-held group.

[0006] Preferably, the listening group includes three tubes, and the front parts of the left and right sides of the outer surface of the three tubes are both sleeved and connected with two rubber tubes, the front sides of the inner cavities of the two rubber tubes are both sleeved and connected with metal tubes, the rear sides of the outer surfaces of the two metal tubes are jointly sleeved and connected with a U-shaped frame, the front parts of the sides of the outer surfaces of the two metal tubes that are close to each other are both sleeved and connected with earplugs, and a nameplate is fixedly connected to the middle part of the front side of the outer surface of the three tubes.

[0007] Preferably, the rear side of the outer surface of the three-way tube is sleeved and connected to the front right side of an inner cavity of the rubber tube.

[0008] Preferably, the tuning mechanism includes an upper cover, and pressure plates are fixedly connected on both sides of the top wall of the inner cavity of the upper cover, a connecting plate is fixedly connected to the middle of the opposite surfaces of the two pressure plates, a control component 2 is fixedly connected to the middle of the upper end of the connecting plate, and a semicircular clamping ring 2 that is symmetrical front and back is fixedly connected to the middle of the top wall of the inner cavity of the upper cover, and four countersunk columns are provided on the upper end of the upper cover, and the inner cavities of the four countersunk columns are fixedly connected to the tuning group by bolts.

[0009] Preferably, the tuning group includes a lower shell, and a connector is fixedly connected to the middle of both front and rear ends of the lower shell, a semicircular clamping ring is fixedly connected to the middle of both front and rear sides of the bottom wall of the inner cavity of the lower shell, a miniature microphone is commonly provided in the inner cavity of the semicircular clamping ring on the front side and the middle of the front side of the bottom wall of the inner cavity of the lower shell, a loudspeaker is commonly provided in the inner cavity of the semicircular clamping ring on the rear side and the middle of the rear side of the bottom wall of the inner cavity of the lower shell, a control component is fixedly connected to the middle of the bottom wall of the inner cavity of the lower shell, and a charging port is provided on the upper middle side of the left end of the lower shell.

[0010] Preferably, the loudspeaker and the miniature microphone are both electrically connected to the control component one through a wire, the charging port is electrically connected to the control component one through a wire, the outer surface of the connector one at the rear side is connected to the front left side of the inner cavity of the rubber tube one, and the outer surface of the connector one at the front side is connected to the rear side of the inner cavity of the rubber tube three.

[0011] Preferably, the second inner cavity of the semicircular clamp located on the front side fits with the front part of the upper outer surface of the miniature microphone, and the second inner cavity of the semicircular clamp located on the rear side fits with the rear part of the upper outer surface of the loudspeaker, and the four countersunk columns are fixedly connected to the four fixing columns by bolts respectively.

[0012] Preferably, the handheld group includes a handle, the outer surface of the handle is provided with four frosted sheets in a circular array, a connector 2 is fixedly connected to the middle of the rear end of the handle, and the outer surface of the connector 2 is sleeved and connected to the front side of the inner cavity of the rubber tube 3.

[0013] Preferably, the sound pickup group includes a probe handle, a probe 1 is fixedly connected to the upper end of the probe handle, a thread 1 is provided on the upper side of the outer surface of the probe 1, a fixed shell 1 is meshedly connected to the surface of the thread 1, a diaphragm 1 is commonly provided between the probe 1 and the fixed shell 1, a probe 2 is fixedly connected to the lower end of the probe handle, a thread 2 is provided on the lower side of the outer surface of the probe 2, a fixed shell 2 is meshedly connected to the outer surface of the thread 2, a diaphragm 2 is commonly provided between the probe 2 and the fixed shell 2, and the front end of the handle is fixedly connected to the input end of the probe handle.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention comprises a listening group, a tuning mechanism, a hand-held group and a sound pickup group. With the coordinated use of the rubber tube 1 and the rubber tube 3, the device has two usage modes. Moreover, through the probe handle, the diaphragm 1, the probe 1 and the probe 2, and with the coordinated use of the rubber tube 1 and the listening group, more details such as faint lung murmurs, abnormal heartbeats, etc. can be captured, providing users with more abundant diagnostic information. Auscultation can be performed at different parts without frequently replacing the stethoscope or adjusting the auscultation head, thereby saving time. In addition, with the coordinated use of the control component 2, the control component 1, the miniature microphone and the loudspeaker, not only the volume of the amplified subtle sound can be adjusted at will, but also the real-time audio can be transmitted to devices such as headphones or smart phones, so that users can conduct further analysis and diagnosis, making the device more flexible and convenient to use. In addition, when a simulated dummy is used for clinical auscultation teaching, the teaching sound can be transmitted to the device through Bluetooth through smart devices such as mobile phones, so that the teaching is closer to clinical practice.

[0015] During the specific use of the present invention, the nameplate can also be used for marking, so that the user can accurately find the device he is using. In addition, there are many devices for clinical teaching, and when one of the devices is damaged, they can be quickly replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 It is a schematic diagram of another viewing angle of the overall structure of the present invention.

[0018] Figure 3 It is a partial structural schematic diagram of the present invention.

[0019] Figure 4Schematic diagram of a listening group of the present invention.

[0020] Figure 5 It is a schematic diagram of the tuning mechanism of the present invention.

[0021] Figure 6 It is a schematic diagram of the tuning group of the present invention.

[0022] Figure 7 It is a schematic diagram of the handheld group of the present invention.

[0023] Figure 8 It is a schematic diagram of the sound pickup group of the present invention.

[0024] Fig. 9 It is a schematic diagram of another viewing angle of the sound pickup group of the present invention.

[0025] Fig.10 It is a schematic diagram of the explosion effect of the sound pickup group of the present invention.

[0026] In the figure: 1. Rubber tube 1; 2. Listening group; 21. Three-way tube; 22. Name plate; 23. Rubber tube 2; 24. U-shaped frame; 25. Metal tube; 26. Earplug; 3. Tuning mechanism; 31. Upper cover; 32. Countersunk column; 33. Tuning group; 331. Lower shell; 332. Connector 1; 333. Fixing column; 334. Control component 1; 335. Charging port; 336. Semicircular clamp 1; 337. Miniature microphone ; 338. Loudspeaker; 34. Pressure plate; 35. Connecting plate; 36. Control component 2; 37. Semicircular clamp 2; 4. Rubber hose 3; 5. Hand-held group; 51. Handle; 52. Frosted sheet; 53. Connector 2; 6. Pickup group; 61. Probe handle; 62. Thread 1; 63. Fixed housing 1; 64. Diaphragm 1; 65. Probe 1; 66. Probe 2; 67. Fixed housing 2; 68. Thread 2; 69. Diaphragm 2. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0028] Embodiment 1, as Figure 1-3 As shown, a stethoscope for clinical teaching includes a rubber tube 1, a tuning mechanism 3 is sleeved and connected to the front left side of the inner cavity of the rubber tube 1, a listening group 2 is sleeved and connected to the front right side of the inner cavity of the rubber tube 1, a rubber tube 3 4 is sleeved and connected to the front side of the tuning mechanism 3, a hand-held group 5 is sleeved and connected to the front side of the inner cavity of the rubber tube 3 4, and a sound pickup group 6 is fixedly connected to the front end of the hand-held group 5.

[0029] It should be noted that to ensure the hygiene and safety of medical equipment and prevent cross infection, the device needs to be disinfected after each patient uses it, which helps reduce the spread of pathogens between patients. The commonly used disinfection method for this device is to wipe the earpiece with 75% ethanol, or wipe it with 500mg / L chlorine-containing disinfectant. These disinfectants can effectively kill common bacteria and viruses. In addition to disinfection after each use, the device also needs to be thoroughly cleaned daily to ensure the hygiene of its surface.

[0030] First, the device has two ways of use. One is to assemble the listening set 2, the rubber tube 1, the hand-held set 5 and the sound pickup set 6. Then, the user wears the listening set 2 to fit the external auditory canal tightly. Then, the hand-held set 5 is used to make the sound pickup set 6 slightly contact with the patient's skin. The sound generated by the vibration of the surrounding air is collected by the sound pickup set 6, and then further analysis and diagnosis are performed. When the first usage method cannot effectively hear the sound inside the patient's body, another usage method is needed. The listening group 2, rubber tube 1, tuning mechanism 3, rubber tube 3 4, hand-held group 5 and sound pickup group 6 are assembled. On the basis of the first assembly method, tuning mechanism 3 and rubber tube 3 4 are added to connect rubber tube 1 to tuning mechanism 3, and the other side of tuning mechanism 3 is connected to hand-held group 5 with rubber tube 3 4. Similarly, the user wears the listening group 2 to fit tightly with the external auditory canal, and then uses the hand-held group 5 to make the sound pickup group 6 slightly contact with the patient's skin, collects the sound generated by the vibration of the surrounding air through the sound pickup group 6, and then amplifies the sound inside the patient's body by adjusting the tuning mechanism 3. In addition, by adjusting the tuning mechanism 3, it also supports the transmission of real-time audio to devices such as headphones or smart phones, which is convenient for users to conduct further analysis and diagnosis, making the device more flexible and convenient to use, and increasing the scope of use of the device.

[0031] In order to accurately find the user's own device before clinical teaching, such as Figure 4 As shown, the listening group 2 includes a three-way tube 21, and the front parts of the left and right sides of the outer surface of the three-way tube 21 are both sleeved and connected with rubber tubes 23, the front sides of the inner cavities of the two rubber tubes 23 are both sleeved and connected with metal tubes 25, the rear sides of the outer surfaces of the two metal tubes 25 are jointly sleeved and connected with a U-shaped frame 24, the front parts of the outer surfaces of the two metal tubes 25 that are close to each other are both sleeved and connected with earplugs 26, a nameplate 22 is fixedly connected to the middle part of the front side of the outer surface of the three-way tube 21, and the rear side of the outer surface of the three-way tube 21 is sleeved and connected to the front part of the right side of the inner cavity of the rubber tube 1.

[0032] First, the U-shaped frame 24 itself is designed to have a certain degree of elasticity, and a metal tube 25 is stuck on both sides. When preparing for use, the user pulls the metal tubes 25 on both sides, and drives the U-shaped frame 24 to stretch, and drives the earplug 26 to fit closely with the external auditory canal through the metal tube 25, which can be suitable for the head size of different users, with moderate tightness. The sound collected by the sound pickup group 6 finally enters the three-way tube 21 through the rubber tube 1, and then passes through the three-way tube 21 through the two rubber tubes 23 and the metal tube 25 to enter the user's ear, and then analyzes and diagnoses. Because the devices used for clinical teaching are usually uniformly disinfected and placed, they can be marked on the nameplate 22, so that users can accurately find the devices they use. In addition, there are many devices used for clinical teaching. When one of the devices is damaged, the mark on the nameplate 22 can also be quickly distinguished.

[0033] In order to make it more convenient for users to hold the device, Figure 7 As shown, the handheld group 5 includes a handle 51, and four frosted sheets 52 are arranged in a circular array on the outer surface of the handle 51. A joint 2 53 is fixedly connected to the middle of the rear end of the handle 51, and the outer surface of the joint 2 53 is sleeved and connected to the front side of the inner cavity of the rubber tube 3 4.

[0034] First, connector 2 53 can be quickly connected to rubber tube 3 4 or rubber tube 1 1 , and the user can grasp the handle 51 with his hand and drive the sound pickup group 6 through the handle 51 so that the sound pickup group 6 is in slight contact with the patient's skin. A frosted sheet 52 is provided on the handle 51 to increase friction, making it more convenient for the user to rotate it by hand and hold it more steadily.

[0035] In order to distinguish different types of sounds and improve the accuracy of diagnosis, such as Figure 8 , Fig. 9 and Fig.10 As shown, the sound pickup group 6 includes a probe handle 61, a probe 1 65 is fixedly connected to the upper end of the probe handle 61, a thread 1 62 is provided on the upper side of the outer surface of the probe 1 65, a fixed housing 1 63 is meshedly connected to the surface of the thread 1 62, a diaphragm 1 64 is provided between the probe 1 65 and the fixed housing 1 63, a probe 2 66 is fixedly connected to the lower end of the probe handle 61, a thread 2 68 is provided on the lower side of the outer surface of the probe 2 66, a fixed housing 2 67 is meshedly connected to the outer surface of the thread 2 68, a diaphragm 2 69 is provided between the probe 2 66 and the fixed housing 2 67, and the front end of the handle 51 is fixedly connected to the input end of the probe handle 61.

[0036] First, diaphragm 1 64 can be stuck in the inner cavity of probe 1 65, and then the fixing sleeve 1 63 is tightened by the cooperation of thread 1 62 to fix diaphragm 1 64. Similarly, diaphragm 2 69 is also fixed between probe 2 66 and fixing sleeve 2 67 to facilitate the replacement of diaphragm 1 64. It should be noted that the probe handle 61, probe 1 65 and probe 2 66 are made of aluminum alloy or stainless steel and have the advantages of smooth surface, reasonable structure, firmness and reliability. At the same time, diaphragm 1 64 and diaphragm 2 69 are made of high-quality materials with good wear resistance and good sound transmission effect. The design size of probe 1 65 is smaller than that of probe 2 66. When the user makes diaphragm 1 64 slightly contact with the patient's skin through the handheld group 5, the sound source can be located more accurately, and the capture of high-frequency sounds is more sensitive, which is more convenient for auscultating the heart, blood vessels and other areas of children. When auscultating an adult's lungs, intestines and other internal organs, the large-surface stethoscope head can provide clearer sound, and the collected sound can enter the rubber tube three 4 or the rubber tube one 1 through the probe handle 61 and the handheld group 5, ultimately achieving the purpose of distinguishing different types of sound and improving the accuracy of diagnosis, and then the sound pickup group 6 can capture more details, such as faint lung murmurs, abnormal heartbeats, etc., providing users with richer diagnostic information, and no need to frequently replace the stethoscope or adjust the stethoscope head, auscultation can be performed on different parts, thereby saving time.

[0037] Embodiment 2: Based on Embodiment 1, this embodiment achieves the purpose of amplifying the sound that cannot be heard clearly, such as Figure 5 and Figure 6 As shown, the tuning mechanism 3 includes an upper cover 31, and the left and right sides of the top wall of the inner cavity of the upper cover 31 are fixedly connected with pressure plates 34, and the middle parts of the opposite surfaces of the two pressure plates 34 are fixedly connected with a connecting plate 35, and the middle part of the upper end of the connecting plate 35 is fixedly connected with a control component 2 36, and the middle part of the inner cavity top wall of the upper cover 31 is fixedly connected with a semicircular clamping ring 2 37 symmetrical in front and back, and four countersunk columns 32 are provided at the upper end of the upper cover 31, and the inner cavities of the four countersunk columns 32 are fixedly connected with a tuning group 33 by bolts, and the tuning group 33 includes a lower shell 331, and the front of the lower shell 331 is fixedly connected with a control component 2 36. A connector 332 is fixedly connected in the middle of both rear ends, a semicircular snap ring 336 is fixedly connected in the middle of both front and rear sides of the inner cavity bottom wall of the lower shell 331, a miniature microphone 337 is provided in the inner cavity of the front semicircular snap ring 336 and the middle of the front side of the inner cavity bottom wall of the lower shell 331, a loudspeaker 338 is provided in the inner cavity of the rear semicircular snap ring 336 and the middle of the rear side of the inner cavity bottom wall of the lower shell 331, a control component 334 is fixedly connected in the middle of the inner cavity bottom wall of the lower shell 331, and a charging port 335 is provided in the upper middle of the left end of the lower shell 331; The loudspeaker 338 and the miniature microphone 337 are both electrically connected to the control component 334 through wires, the charging port 335 is electrically connected to the control component 334 through wires, the outer surface of the rear connector 332 is sleeved and connected to the left front part of the inner cavity of the rubber tube 1, the outer surface of the front connector 332 is sleeved and connected to the rear side of the inner cavity of the rubber tube 34, the inner cavity of the front semicircular clamp 2 37 is fitted with the upper front part of the outer surface of the miniature microphone 337, and the inner cavity of the rear semicircular clamp 2 37 is fitted with the upper rear part of the outer surface of the loudspeaker 338, and the four countersunk columns 32 are fixedly connected to the four fixing columns 333 by bolts.

[0038] It should be noted that the specific installation methods and circuit connection methods and control methods of the control component 2 36, the control component 1 334, the charging port 335, the miniature microphone 337 and the loudspeaker 338 in the present invention are all conventional designs and are conventional design means for designers. The control component 2 36 is composed of four buttons and a circuit board adapted thereto, and the control component 1 334 is composed of a processor, a signal receiver, a signal transmitter, a battery and other components. The control component 2 36, the control component 1 334, the charging port 335, the miniature microphone 337 and the loudspeaker 338 cooperate with each other. Four bolts respectively penetrate the inner cavities of the four countersunk columns 32 and engage in the inner cavities of the fixing columns 333 on the same side to fix the upper cover 31 and the lower shell 331.

[0039] First, when the sound inside the patient's body cannot be effectively heard, the connector 1 332 on the lower shell 331 is connected to the rubber tube 1 and the rubber tube 3 4 respectively, and then the rubber tube 3 4 is connected to the handheld group 5. The user wears the device through the listening group 2, presses the switch button in the control component 2 36 to turn it on, and then drives the pickup group 6 through the handheld group 5 to lightly contact the patient's skin to collect the sound inside the patient's body. The sound is finally received by the miniature microphone 337 through the handheld group 5, the rubber tube 3 4 and the connector 1 332 on the front side. The received sound is converted into an electrical signal by the miniature microphone 337 and transmitted to the processor in the control component 1 334 for processing. After the electrical signal is processed by the relevant program in the processor, it is transmitted to the loudspeaker 338, and the processed electrical signal is converted into sound again by the loudspeaker 338. The sound generated by 338 enters the listening group 2 through the rear connector 332 and the rubber tube 1, and finally enters the user's ear through the listening group 2. In addition, the Bluetooth button in the control component 36 can be pressed and used in conjunction with the control component 334 to transmit real-time audio to devices such as headphones or smart phones. In this process, the two volume buttons in the control component 36 can also be adjusted to adjust the volume at will, which is convenient for the user to conduct further analysis and diagnosis, making the device more flexible and convenient to use, and it can be charged through the charging port 335 at ordinary times. In addition, in clinical teaching, there are not only real-person on-site teaching, but also teaching of auscultation through simulated dummies. When using simulated dummies for clinical auscultation teaching, the teaching sound can be transmitted to the device through Bluetooth through smart devices such as mobile phones, making the teaching closer to clinical practice.

[0040] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A stethoscope for clinical teaching, comprising a rubber tube (1), characterized in that: The left front part of the inner cavity of the rubber tube one (1) is sleeved with a tuning mechanism (3), the right front part of the inner cavity of the rubber tube one (1) is sleeved with a listening group (2), the front side of the tuning mechanism (3) is sleeved with a rubber tube three (4), the front side of the inner cavity of the rubber tube three (4) is sleeved with a hand-held group (5), and the front end of the hand-held group (5) is fixedly connected to a sound pickup group (6).

2. A stethoscope for clinical teaching according to claim 1, characterized in that: The listening group (2) comprises a three-way tube (21), the front portions of the left and right sides of the outer surface of the three-way tube (21) are sleeved and connected to two rubber tubes (23), the front sides of the inner cavities of the two rubber tubes (23) are sleeved and connected to metal tubes (25), the rear sides of the outer surfaces of the two metal tubes (25) are sleeved and connected to a U-shaped frame (24), the front portions of the outer surfaces of the two metal tubes (25) close to each other are sleeved and connected to earplugs (26), and the middle portion of the front side of the outer surface of the three-way tube (21) is fixedly connected to a name plate (22).

3. A stethoscope for clinical teaching according to claim 2, characterized in that: The rear side of the outer surface of the three-way tube (21) is sleeved and connected to the front right side of the inner cavity of the rubber tube (1).

4. A stethoscope for clinical teaching according to claim 1, characterized in that: The tuning mechanism (3) comprises an upper cover (31), the left and right sides of the top wall of the inner cavity of the upper cover (31) are fixedly connected to pressure plates (34), the middle parts of the opposing surfaces of the two pressure plates (34) are commonly fixedly connected to a connecting plate (35), the middle part of the upper end of the connecting plate (35) is fixedly connected to a second control component (36), the middle part of the top wall of the inner cavity of the upper cover (31) is fixedly connected to a second semicircular clamping ring (37) symmetrical in front and back, and the upper end of the upper cover (31) is provided with four countersunk columns (32), and the inner cavities of the four countersunk columns (32) are fixedly connected to a tuning group (33) by bolts.

5. A stethoscope for clinical teaching according to claim 4, characterized in that: The tuning group (33) comprises a lower shell (331), the middle parts of both front and rear ends of the lower shell (331) are fixedly connected to a joint one (332), the middle parts of both front and rear sides of the inner cavity bottom wall of the lower shell (331) are fixedly connected to a semicircular clamping ring one (336), the inner cavity of the semicircular clamping ring one (336) and the middle part of the front side of the inner cavity bottom wall of the lower shell (331) are jointly provided with a miniature microphone (337), the inner cavity of the semicircular clamping ring one (336) and the middle part of the rear side of the inner cavity bottom wall of the lower shell (331) are jointly provided with a loudspeaker (338), the middle part of the inner cavity of the semicircular clamping ring one (336) and the middle part of the rear side of the inner cavity bottom wall of the lower shell (331) are fixedly connected to a control component one (334), and the upper side of the middle part of the left end of the lower shell (331) is provided with a charging port (335).

6. A stethoscope for clinical teaching according to claim 5, characterized in that: The loudspeaker (338) and the miniature microphone (337) are both electrically connected to the control component one (334) via a wire, the charging port (335) is electrically connected to the control component one (334) via a wire, the outer surface of the connector one (332) located at the rear side is sleeved and connected to the front left side of the inner cavity of the rubber tube one (1), and the outer surface of the connector one (332) located at the front side is sleeved and connected to the rear side of the inner cavity of the rubber tube three (4).

7. A stethoscope for clinical teaching according to claim 5, characterized in that: The inner cavity of the second semicircular clamp ring (37) located at the front side is fitted with the front portion of the upper side of the outer surface of the miniature microphone (337), and the inner cavity of the second semicircular clamp ring (37) located at the rear side is fitted with the rear portion of the upper side of the outer surface of the loudspeaker (338). The four countersunk columns (32) are fixedly connected to the four fixing columns (333) by bolts.

8. A stethoscope for clinical teaching according to claim 1, characterized in that: The handheld group (5) comprises a handle (51), the outer surface of which is provided with four frosted sheets (52) in a circular array, a second connector (53) being fixedly connected to the middle of the rear end of the handle (51), and the outer surface of the second connector (53) being sleeve-connected to the front side of the inner cavity of the third rubber tube (4).

9. A stethoscope for clinical teaching according to claim 8, characterized in that: The sound pickup group (6) comprises a probe handle (61), the upper end of which is fixedly connected to a probe 1 (65), the upper side of the outer surface of the probe 1 (65) is provided with a thread 1 (62), the surface of the thread 1 (62) is meshedly connected to a fixed housing 1 (63), a diaphragm 1 (64) is provided between the probe 1 (65) and the fixed housing 1 (63), the lower end of the probe handle (61) is fixedly connected to a probe 2 (66), the lower side of the outer surface of the probe 2 (66) is provided with a thread 2 (68), the outer surface of the thread 2 (68) is meshedly connected to a fixed housing 2 (67), a diaphragm 2 (69) is provided between the probe 2 (66) and the fixed housing 2 (67), and the front end of the handle (51) is fixedly connected to the input end of the probe handle (61).

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