A stethoscope

Abstract

The utility model discloses an external electronic stethoscope, including the casing of tubular structure, the bottom of casing is equipped with the auscultation film for contacting the body surface, the inside of casing is provided with the sound collecting cover, the transmission hose and the upper mounting plate from below to above in proper order, the sound collecting cover lower extreme is the arc open mouth modeling, and with the resonance cavity that auscultation film surrounds together is formed, the transmission hose lower extreme is connected on the sound collecting cover, and with the resonance cavity intercommunication, the transmission hose upper extreme is fixed in the lower side of upper mounting plate, the lower side fixed mounting of upper mounting plate has the acoustic collector, and the acoustic collector is located the inside of transmission hose upper end, the inside of casing still is installed with the circuit board and the loudspeaker, and the acoustic collector is connected with the circuit board electricity, and the circuit board is equipped with the amplifier circuit, and the signal of acoustic collector gathers plays the sound by the loudspeaker after the amplifier circuit processing on the circuit board.

Description

Technical Field

[0001] This utility model relates to the field of intelligent medical devices, specifically to an externally-speaker electronic stethoscope. Background Technology

[0002] As a fundamental tool for clinical diagnosis, the stethoscope has become an indispensable piece of equipment in doctors' daily practice, widely used in various medical scenarios. In the cardiovascular field, the stethoscope is used to detect abnormal heart sounds, such as heart murmurs, arrhythmias, and valvular diseases, aiding in the preliminary diagnosis of coronary heart disease, heart failure, and congenital heart disease. In the diagnosis of respiratory diseases, doctors identify pneumonia, asthma, chronic obstructive pulmonary disease, and pneumothorax by listening to breath sounds. Furthermore, in emergency departments and ICUs, the stethoscope can be used to quickly assess patients' vital signs, such as monitoring bowel sounds and assessing hemodynamic status. In pediatrics, due to the limited expressive abilities of children, the stethoscope is particularly important in the early screening of diseases such as congenital heart disease and bronchitis. Simultaneously, the stethoscope is also widely used in primary healthcare, pre-hospital emergency care, and telemedicine, serving as a low-cost and highly efficient preliminary diagnostic tool.

[0003] Traditional stethoscopes are mostly ear-hook mechanical structures. Their core components include a diaphragm stethoscope head, a conductive tube, and an earplug. Their working principle is based on the mechanical conduction of sound waves: when the diaphragm of the stethoscope head contacts the patient's skin, vibrations from internal organs (such as the heart and lungs) cause the diaphragm to vibrate synchronously. These mechanical vibrations are conducted through the diaphragm to a sealed air cavity within the stethoscope head, then propagate through an air column in the conductive tube, ultimately transmitting the sound waves to the doctor's earplug. Because the diaphragm is sensitive to high-frequency vibrations (such as heart sounds and breath sounds), this design is particularly suitable for detecting high-frequency bio-sound signals. Simultaneously, the rigid structure of the diaphragm effectively amplifies the sound, while the airtightness of the conductive tube ensures the fidelity of the sound waves during transmission.

[0004] While traditional stethoscopes are simple and reliable in structure, their functional and usage limitations are becoming increasingly apparent: 1. Limited functionality: They rely solely on physical sound transmission and cannot play sound aloud, making them unsuitable for multi-person auscultation in team collaborations or teaching settings; 2. Inconvenient sterilization: Traditional stethoscopes are difficult to sterilize, especially in high-risk environments such as ICUs and emergency departments, posing a risk of cross-infection; 3. Inconvenient operation: Doctors must wear earplugs for extended periods, limiting their use in noisy environments or when wearing protective clothing. In recent years, electronic stethoscopes have emerged, partially solving the problem of sound digitization through built-in sensors and signal amplification technology. However, existing solutions often suffer from complex structures, high costs, and poor portability. Utility Model Content

[0005] In view of this, the present invention provides an external speaker electronic stethoscope, which has a simple structure, is easy to operate, is portable, and can realize the external playback of stethoscope sound.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] An external electronic stethoscope includes a cylindrical housing with a stethoscope diaphragm at the bottom for contact with the body surface. Inside the housing, from bottom to top, are a sound collector, a conductive hose, and an upper mounting plate. The lower end of the sound collector has an arc-shaped opening, forming a resonant cavity with the stethoscope diaphragm. The lower end of the conductive hose is connected to the sound collector and communicates with the resonant cavity. The upper end of the conductive hose is fixed to the lower side of the upper mounting plate. An acoustic sensor is fixedly mounted on the lower side of the upper mounting plate, located inside the upper end of the conductive hose.

[0008] The housing also contains a circuit board and a speaker. The acoustic acquisition device is electrically connected to the circuit board, which is equipped with an amplification circuit. The signal acquired by the acoustic acquisition device is processed by the amplification circuit on the circuit board and then played by the speaker.

[0009] By adopting the above structure, combined with mechanical resonance and electronic amplification, electronic sound acquisition and direct external playback can be achieved, simplifying the structure of traditional stethoscopes and improving the ease of use and operation.

[0010] Preferably, the resonant cavity is a conical cavity structure. This structure improves the efficiency and clarity of acoustic signal acquisition, reduces external interference, and enhances diagnostic accuracy.

[0011] Preferably, a lower mounting plate is fixedly installed inside the housing, located below the upper mounting plate. The sound collector is located below the lower mounting plate. The lower mounting plate has a through hole for a conductive hose to pass through. The conductive hose is fixedly installed between the upper and lower mounting plates. This structure, with its layered layout, is compact.

[0012] Preferably, the upper mounting plate has a downwardly extending annular groove on its lower side, and the upper end of the conductive hose has a horizontally extending outward flange. A silicone pad is provided between the flange and the lower surface of the upper mounting plate. Both the silicone pad and the flange are fixed within the annular groove, and the acoustic collector is fixedly installed at the lower end of the silicone pad. An annular support component is provided below the lower mounting plate. One end of the annular support component is fixedly engaged with the inner wall of the housing, and the other end extends upward at an angle, forming a support hole at its upper end. The upper end of the sound collecting cover has a connecting pipe section, which is fixedly installed within the support hole. The lower end of the conductive hose is connected to the connecting pipe section. With this structure, the annular groove and the support component work together to ensure the conductive hose is vertically fixed, optimizing the sound wave transmission path and reducing sound attenuation and distortion.

[0013] Preferably, a transition short tube is coaxially provided on the inner side of the connection between the connecting pipe section and the conductive hose. The transition short tube is tightly fitted to the inner wall of both the connecting pipe section and the conductive hose, and the inner diameter of the upper end of the transition short tube gradually decreases along the direction of the conductive hose. This structure smoothly connects the resonant cavity and the conductive hose, reduces sound wave reflection and turbulence, and further improves the transmission efficiency of high-frequency sound.

[0014] Preferably, the acoustic acquisition device is an electret microphone. With the above structure, the electret microphone has high sensitivity, fast response, and can accurately capture weak physiological sounds, while also having low power consumption, making it suitable for portable devices.

[0015] Preferably, the top of the housing is provided with an end cap, on which volume control buttons and a power button are provided. This structure facilitates operation.

[0016] Preferably, a battery is mounted on the lower mounting plate, and the battery is arranged circumferentially along the conductive hose. This structure results in a compact layout.

[0017] Preferably, the stethoscope diaphragm is equipped with a heating wire, which allows the temperature of the stethoscope diaphragm to approach human body temperature. This structure avoids cold stimulation that could cause patient discomfort and improves patient comfort.

[0018] Preferably, a mounting bracket extends downwards from the inner side of the end cover, and the speaker is fixedly mounted on the mounting bracket. Multiple sound outlet holes are provided on the end cover corresponding to the speaker positions. This structure ensures clear and stable sound output.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. The external-firing electronic stethoscope provided by this utility model realizes real-time external sound playback through the integrated design of electret microphone, amplification circuit and speaker. Combined with acoustic optimization of resonant cavity and transition short tube, it meets the listening needs of diagnosis.

[0021] 2. The layered layout integrates the components inside the shell, resulting in a simple, compact structure that is easy to carry and operate. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a schematic diagram showing the bottom stethoscope membrane 2;

[0024] Figure 3 This is a diagram illustrating the top buttons;

[0025] Figure 4 To show the sectional view of the internal installation structure;

[0026] Figure 5 A sectional view to show the internal layout;

[0027] Figure 6 A cross-sectional view showing the layout of battery 11;

[0028] Figure 7 This is the schematic diagram of the amplifier circuit of this utility model. Detailed Implementation

[0029] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0030] like Figure 1 and Figure 2 As shown, an external electronic stethoscope includes a cylindrical housing 1 with a central protrusion for easy handheld operation by a doctor. A stethoscope 2 is located at the bottom of the housing 1 for contact with the patient's skin. Heating wires are evenly distributed inside the stethoscope 2, enabling its temperature to quickly approach and maintain within the range of 36.5℃-37.5℃, providing a comfortable examination experience for the patient.

[0031] like Figure 5 As shown, inside the housing 1, from bottom to top, a sound collecting cover 3, a conductive hose 4, and an upper mounting plate 8 are arranged sequentially. The lower end of the sound collecting cover 3 is designed with an arc-shaped open shape, which together with the stethoscope diaphragm 2 forms a resonant cavity 3a. The resonant cavity 3a has a conical cavity structure. This conical design can effectively enhance the sound resonance effect at specific frequencies, significantly improving the acquisition efficiency of high-frequency biological signals such as heart sounds and breath sounds. Compared with the traditional cylindrical resonant cavity, it can reduce external interference and significantly improve diagnostic accuracy.

[0032] like Figure 5 As shown, the conductive hose 4 is made of medical-grade silicone, which has good flexibility and sealing properties. The lower end of the conductive hose 4 is tightly connected to the sound collector 3, communicating with the resonant cavity 3a, while the upper end is fixed to the lower side of the upper mounting plate 8. An annular groove 8a extends downward from the lower side of the upper mounting plate 8. The upper end of the conductive hose 4 has a horizontally outwardly extending flange 4a. A silicone pad 17 is placed between the flange 4a and the lower surface of the upper mounting plate 8. The silicone pad 17 and the flange 4a are fixed together in the annular groove 8a. In this way, not only is the conductive hose 4 stably installed, but the silicone pad 17 also plays a role in sealing and shock absorption, reducing the interference of external vibrations on acoustic acquisition. At the same time, an acoustic acquisition device 5 is also fixedly installed on the lower side of the upper mounting plate 8. In this embodiment, the acoustic acquisition device 5 is an electret microphone with high sensitivity, fast response speed and low power consumption. The electret microphone is located inside the upper end of the conductive hose 4 and can accurately capture the sound signal transmitted through the conductive hose 4.

[0033] like Figure 4 and Figure 5 As shown, a lower mounting plate 9, located below the upper mounting plate 8, is also fixedly installed inside the housing 1. The sound collector 3 is located below the lower mounting plate 9. The lower mounting plate 9 has a through hole 9a adapted to the conductive hose 4, allowing the conductive hose 4 to pass through and be fixed between the upper mounting plate 8 and the lower mounting plate 9. A ring-shaped support member 10 is provided below the lower mounting plate 9. One end of the ring-shaped support member 10 is fixedly clamped to the inner wall of the housing 1, and the other end extends upward at an angle, forming a support hole 10a at the upper end. The upper end of the sound collector 3 has a connecting pipe section 3b, which is tightly fixedly installed in the support hole 10a to ensure the stability of the sound collector 3. The lower end of the conductive hose 4 is connected to the connecting pipe section 3b. A transition short pipe 13 is coaxially provided on the inner side of the position where the connecting pipe section 3b communicates with the conductive hose 4. The transition short pipe 13 is tightly fitted with the inner wall of the connecting pipe section 3b and the conductive hose 4 through an interference fit. The inner diameter of the upper end of the transition short tube 13 gradually decreases along the direction of the conductive hose 4, which can effectively reduce the reflection and turbulence of sound waves at the connection.

[0034] like Figure 4 and Figure 5 As shown, a circuit board 6 and a speaker 7 are also installed inside the housing 1. The circuit board 6 is fixedly mounted on the upper surface of the upper mounting plate 8, and integrates an amplifier circuit, a temperature control circuit, etc. The amplifier circuit adopts a multi-stage amplification design, which can effectively amplify the weak electrical signal collected by the acoustic acquisition device 5. The circuit diagram of the amplifier circuit is shown in the figure. Figure 7 The temperature control circuit is used to precisely control the working state of the heating wire inside the stethoscope diaphragm 2. The speaker 7 is fixedly mounted on a mounting bracket 12a extending downwards inside the end cover 12. The mounting bracket 12a is integrally formed with the end cover 12 to ensure a secure installation. The end cover 12 snaps onto the top of the housing 1 for easy disassembly and maintenance, such as... Figure 3 As shown, the end cover 12 has multiple sound outlet holes 12b corresponding to the speaker 7 to ensure clear and stable sound playback. The end cover 12 also has volume control buttons 14 and a power button 15 for easy operation.

[0035] Amplifying the sound collected by the electret microphone through an amplification circuit and playing it through the speaker 7 is a conventional technique in this field. The principle is to use operational amplifiers, resistors, capacitors and other electronic components to form a multi-stage amplification circuit to amplify the weak electrical signal output by the electret microphone in terms of voltage and power, so as to drive the speaker 7 to produce sound. This embodiment will not be described in detail.

[0036] like Figure 5 and Figure 6As shown, a battery 11 is mounted on the lower mounting plate 9. The battery 11 is arranged in a ring around the conductive tubing 4 and connected to the circuit board 6. This ring arrangement makes full use of the internal space of the device, making the overall structure more compact, while ensuring the balance of the device's center of gravity, making it easy for doctors to hold and operate. Figure 2 The housing 1 shown is also equipped with a charging port 16, which can charge the battery 11 to meet daily medical needs.

[0037] like Figure 3 and 5 As shown, when a doctor uses this external electronic stethoscope, they first turn on the switch button 15 on the end cover 12. The device starts, and the heating wire inside the stethoscope diaphragm 2 begins to work, raising the temperature of the stethoscope diaphragm 2 to a suitable range. Then, the stethoscope diaphragm 2 is brought into contact with the patient's body surface. The vibrations generated by the human organs cause the stethoscope diaphragm 2 to vibrate synchronously. These vibrations are amplified through the resonant cavity 3a and then transmitted to the acoustic acquisition unit 5 through the conductive hose 4. The acoustic acquisition unit 5 converts the mechanical vibrations into electrical signals. The electrical signals are transmitted to the circuit board 6, and after being processed by the amplification circuit, filtering circuit, etc., they drive the speaker 7 to play sound. The doctor can adjust the volume using the volume adjustment button 14 according to actual needs, so as to clearly hear the patient's physiological sounds and complete the diagnosis. After use, the switch button 15 is turned off. This stethoscope adopts an integrated design, has a simple structure, is easy to carry and disinfect, and can accurately and clearly play sound externally, meeting the needs of multiple people for auscultation in team collaboration or teaching scenarios.

[0038] Finally, it should be noted that the above description is merely a preferred embodiment of the present utility model. Those skilled in the art, under the guidance of the present utility model, can make various similar representations without departing from the spirit and claims of the present utility model, and such modifications all fall within the protection scope of the present utility model.

Claims

1. An external speaker electronic stethoscope, characterized in that: The device includes a cylindrical housing (1), with a stethoscope (2) at the bottom for contact with the body surface. Inside the housing (1), from bottom to top, there are a sound collecting cover (3), a conductive hose (4), and an upper mounting plate (8). The lower end of the sound collecting cover (3) is an arc-shaped opening, which together with the stethoscope (2) forms a resonant cavity (3a). The lower end of the conductive hose (4) is connected to the sound collecting cover (3) and communicates with the resonant cavity. The upper end of the conductive hose (4) is fixed to the lower side of the upper mounting plate (8). An acoustic collector (5) is fixedly installed on the lower side of the upper mounting plate (8), and the acoustic collector (5) is located inside the upper end of the conductive hose (4). The housing (1) is also equipped with a circuit board (6) and a speaker (7). The acoustic collector (5) is electrically connected to the circuit board (6). The circuit board (6) is provided with an amplification circuit. The signal collected by the acoustic collector is processed by the amplification circuit on the circuit board (6) and then played by the speaker (7).

2. The external speaker electronic stethoscope according to claim 1, characterized in that: The resonant cavity (3a) is a conical cavity structure.

3. The external speaker electronic stethoscope according to claim 1, characterized in that: The housing (1) has a lower mounting plate (9) fixedly installed inside, located below the upper mounting plate (8). The sound collection cover (3) is located below the lower mounting plate (9). The lower mounting plate (9) has a through hole (9a) for inserting a conductive hose (4). The conductive hose (4) is fixedly installed between the upper mounting plate (8) and the lower mounting plate (9).

4. The external speaker electronic stethoscope according to claim 3, characterized in that: The upper mounting plate (8) has an annular groove (8a) extending downward on its lower side. The upper end of the conductive hose (4) has a horizontally outwardly extending flange (4a). A silicone pad (17) is provided between the flange (4a) and the lower surface of the upper mounting plate (8). The silicone pad (17) and the flange (4a) are both fixed in the annular groove (8a). The acoustic collector (5) is fixedly installed at the lower end of the silicone pad (17). The lower mounting plate (9) is provided with an annular support component (10). One end of the annular support component (10) is fixedly clamped to the inner wall of the housing (1), and the other end extends upward at an incline, forming a support hole (10a) at the upper end. The upper end of the sound collecting cover (3) has a connecting pipe section (3b), which is fixedly installed in the support hole (10a). The lower end of the conductive hose (4) is connected to the connecting pipe section (3b).

5. The external speaker electronic stethoscope according to claim 4, characterized in that: A transition short pipe (13) is coaxially provided on the inner side of the connection position between the connecting pipe section (3b) and the conductive hose (4). The transition short pipe (13) is tightly fitted with the inner wall of the connecting pipe section (3b) and the conductive hose (4). The inner diameter of the upper end of the transition short pipe (13) gradually decreases along the direction of the conductive hose (4).

6. The external speaker electronic stethoscope according to claim 1, characterized in that: The acoustic acquisition device (5) is an electret microphone.

7. The external speaker electronic stethoscope according to claim 1, characterized in that: The housing (1) has an end cap (12) on its top, and the end cap (12) has a volume adjustment button (14) and a power button (15).

8. An external speaker electronic stethoscope according to claim 3, characterized in that: A battery (11) is mounted on the lower mounting plate (9), and the battery (11) is arranged circumferentially along the conductive hose (4).

9. The external speaker electronic stethoscope according to claim 1, characterized in that: The stethoscope (2) is equipped with a heating wire inside, which enables the stethoscope (2) to be heated to a temperature close to that of the human body.

10. An external speaker electronic stethoscope according to claim 7, characterized in that: The end cap (12) has a mounting bracket (12a) extending downward inside. The speaker (7) is fixedly mounted on the mounting bracket (12a). The end cap (12) has multiple sound outlet holes (12b) corresponding to the position of the speaker (7).

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