Low-loss stethoscope

Abstract

The utility model discloses a low-loss stethoscope, which belongs to the technical field of stethoscopes, and solves the problems that as long as ears still keep a sound receiving state, extremely low loss cannot be inevitably realized when auscultation is performed through the stethoscope, even if sound is obtained in an electronic mode. Comprising noise reduction earmuffs, a mounting pipe fixedly connected to the noise reduction earmuffs, a connecting shell communicated with the mounting pipe and used for making contact with a zygomatic arch, and a connecting pipe fixedly connected with the mounting pipe and having elastic deformation performance. When in use, the headband is manually adjusted to leave a space between the extension sheets on the two sides, the head extends into the headband and the earplugs are inserted into the ears to realize primary noise reduction, after the elasticity of the headband is released, the memory sponge ear pad is tightly attached according to the head shape to perform secondary noise reduction, the sponge pad improves the wearing comfort, the Y-shaped tube is easy to adjust, and the noise reduction effect is good. The pleural head captures the pressure change of the chest of a patient, converts the pressure change into sound through a sensor and circuit processing, and sends the sound to medical staff through bone conduction without interference.

Description

Technical Field

[0001] The utility model relates to the technical field of stethoscopes, in particular to a low-loss stethoscope. Background Art

[0002] A stethoscope is a device used to listen to sounds inside the body, such as those of the heart, lungs, and intestines. Traditional stethoscopes have a metal or plastic port, called a pleural head, that the doctor places on the patient's body, transmitting the sounds to the ear through a hollow rubber tube. Modern stethoscopes typically have two modes: a rounded tip for low-frequency sounds and a flat tip for high-frequency sounds. Stethoscopes also have an ear hook system that can be adjusted for seal and comfort.

[0003] Stethoscopes not only help doctors diagnose heart disease, but also detect abnormalities in the respiratory system and intestines. Outside the medical field, stethoscopes can also be used for industrial inspections, such as detecting abnormal sounds inside mechanical equipment. As technology develops, electronic stethoscopes have emerged, which are equipped with amplifiers, digital signal processing technology and possible Bluetooth connectivity, making diagnosis more accurate, and data can be recorded and transmitted electronically, providing more possibilities for remote medical services. Whether in the emergency room, operating room, clinic or home medicine box, the stethoscope is an indispensable medical tool.

[0004] In the prior art, in order to reduce the loss of the stethoscope, people have adopted various methods, such as directly transmitting the body's sound to the human ear through electronic means. However, for the human ear, the way it receives sound is to allow sound waves to enter through the ear. As long as the ear still maintains a sound-receiving state, it is impossible to achieve extremely low loss when auscultating through a stethoscope, even if the sound is obtained electronically.

[0005] Therefore, a low-loss stethoscope is proposed to solve or alleviate the above problems. Utility Model Content

[0006] The utility model aims to solve the shortcomings in the prior art and provides a low-loss stethoscope.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A low-loss stethoscope comprises a noise-reducing earmuff, a mounting tube fixedly connected thereto, a connecting shell connected to the mounting tube and used for contacting a zygomatic arch, a connecting tube fixedly connected to the mounting tube and having elastic deformation performance, a hose connected to the end of the connecting tube, and a pleural head fixedly connected to the end of the hose, wherein the connecting tube is Y-shaped, and the two sides of the upper end thereof are respectively connected to two mounting tubes, and the lower end thereof is fixedly connected to the hose, and further comprises a monitoring circuit, wherein the monitoring circuit comprises a piezoelectric film sensor, an air conduction speaker, and a signal processor coupling the two, wherein the piezoelectric film sensor is arranged on the pleural head, and the air conduction speaker is arranged in the connecting shell.

[0009] Preferably, the signal processor includes an A / D converter coupled to the piezoelectric film sensor, a filter coupled thereto, and an audio processor coupled to the filter, and an output end of the audio processor is coupled to the air conduction speaker.

[0010] Preferably, the piezoelectric film sensor, the air conduction speaker, the A / D converter, the filter, and the audio processor are all connected through wires.

[0011] Preferably, the noise reduction earmuffs include a headband, extension pieces fixedly connected to both ends thereof, and earmuffs fixedly connected to the extension pieces, and the earmuffs on both sides facing each other are provided with a primary noise reduction component and a secondary noise reduction component.

[0012] Preferably, the primary noise reduction component includes a connecting rod fixedly connected to the earmuff, and an earplug fixedly connected to the connecting rod, and the earplug is made of soft rubber material.

[0013] Preferably, the secondary noise reduction component includes an ear pad fixedly connected to the earmuff and surrounding the outer ring of the primary noise reduction component, and the ear pad is made of memory foam material.

[0014] Preferably, a layer of sponge pad is fixedly connected to the inner ring of the headband.

[0015] The utility model has the following beneficial effects:

[0016] The stethoscope of the utility model provides a quick and convenient way for medical staff. When in use, it is only necessary to manually apply force to the headband to cause elastic deformation of the headband and the extension piece, forming a suitable space for medical staff to easily place the head therein. As a primary noise reduction component, the earplug is inserted into the ear to effectively isolate external noise. Subsequently, under the recovery effect of the elastic force, the ear pad made of memory foam fits the head contour tightly, closes the gap to the greatest extent, further reduces the penetration of sound waves, and achieves an excellent secondary noise reduction effect.

[0017] When the stethoscope is used for a long time and multiple times, the sponge pad on the headband protects the user's head from direct pressure and improves comfort. At the same time, the Y-shaped connection tube design can be easily adjusted to adapt to different head shapes. When the connection shell is close to the zygomatic arch of the side face of the medical staff, stability and comfort can be ensured. The medical staff operates the pleural head to make it contact the patient's body. At this time, the physiological activities of the thoracic diaphragm, such as heartbeat and breathing, produce pressure changes that are captured by the sensor and converted into electrical signals. These signals are sent to the signal processing circuit, and after being digitized and optimized, they are transmitted to the air conduction speaker through wires and finally converted into amplified analog sound waves.

[0018] Not only that, this design also allows sound to be transmitted directly to medical staff through bone conduction, providing an effective way to avoid external sound interference and ensure diagnostic accuracy. In order to further optimize the sound insulation effect, the stethoscope's ear pads and earplugs work together to completely block external noise and minimize the impact of environmental noise, allowing medical staff to focus on listening to the patient's inner voice even in a noisy medical environment, thereby improving the accuracy of diagnosis. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 It is a structural block diagram of the monitoring circuit in the utility model.

[0021] 1. Headband; 2. Sponge pad; 3. Extension piece; 4. Earmuff; 5. Earpad; 6. Connecting rod; 7. Earplug; 8. Mounting tube; 9. Connecting shell; 91. Air conduction speaker; 10. Connecting tube; 11. Hose; 12. Pleural head; 121. Piezoelectric film sensor; 13. Signal processor; 131. A / D converter; 132. Filter; 133. Audio processor. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] A low-loss stethoscope, such as Figure 1 As shown, it includes a noise reduction earmuff, a mounting tube 8 fixedly connected thereto, a connecting shell 9 connected to the mounting tube 8 and used for contacting the zygomatic arch, a connecting tube 10 fixedly connected to the mounting tube 8 and having elastic deformation performance, a hose 11 connected to the end of the connecting tube 10, and a pleural head 12 fixedly connected to the end of the hose 11. The connecting tube 10 is Y-shaped, and the two sides of its upper end are respectively connected to the two mounting tubes 8, and the lower end is fixedly connected to the hose 11.

[0024] The noise reduction earmuffs include a headband 1, extension pieces 3 fixedly connected to both ends thereof, and earmuffs 4 fixedly connected to the extension pieces 3. A layer of sponge pad 2 is fixedly connected to the inner circle of the headband 1, and the sides of the earmuffs 4 facing each other are provided with a primary noise reduction component and a secondary noise reduction component.

[0025] The primary noise reduction component includes a connecting rod 6 fixedly connected to the earmuff 4, and an earplug 7 fixedly connected to the connecting rod 6, and the earplug 7 is made of soft rubber material. The secondary noise reduction component includes an ear pad 5 fixedly connected to the earmuff 4 and surrounding the outer circle of the primary noise reduction component, and the ear pad 5 is made of memory foam material.

[0026] like Figure 2 As shown, it also includes a monitoring circuit, which includes a piezoelectric film sensor 121, an air conduction speaker 91, and a signal processor 13 coupled to the two. The piezoelectric film sensor 121 is arranged on the pleural head 12, and the air conduction speaker 91 is arranged in the connecting shell 9. The signal processor 13 includes an A / D converter 131 coupled to the piezoelectric film sensor 121, a filter 132 coupled to the piezoelectric film sensor 121, and an audio processor 133 coupled to the filter 132. The output end of the audio processor 133 is coupled to the air conduction speaker 91, and the piezoelectric film sensor 121, the air conduction speaker 91, the A / D converter 131, the filter 132, and the audio processor 133 are all connected by wires.

[0027] When medical personnel need to use the utility model, they only need to manually exert force on the headband 1, so that the headband 1 and the extension piece 3 are elastically deformed, and then a relatively ample space is formed between the extension pieces 3 on both sides for the medical personnel to put their heads into, and the earplugs 7 are inserted into the ears as a primary noise reduction component to reduce noise, thereby isolating the external sound for the first time, and then the ear pads 5 made of memory sponge material are made to fit the shape of the human head under the action of the elastic potential energy released by the headband 1 and the extension piece 3, so as to ensure that the ear pads 5 are closely fitted to the human head, minimize the gap and reduce the penetration of sound waves, and then complete the second noise reduction, ensuring that people are in a state of high noise reduction and cannot receive sound waves through the ears. In this process, the sponge pad 2 on the headband 1 ensures that when the medical personnel use the stethoscope for a long time and multiple times, the direct contact between the head and the headband 1 can be reduced, thereby improving the comfort of the medical personnel during use, and in the process of wearing it, the Y-shaped connecting tube 10 will also The pleural head 12 is deformed accordingly, making it easier for the medical staff to put their heads in. At this time, the connecting shell 9 on the mounting tube 8 has been fitted to the side zygomatic arch of the medical staff. When the medical staff holds the pleural head 12 to fit it to the patient's body, the patient's chest diaphragm will produce pressure changes when experiencing physical activities such as heartbeat or breathing. These pressure changes are detected by the pressure-sensitive film sensor of the pleural head 12 and converted into electrical signals, which are then transmitted to the signal processing circuit, which digitizes the electrical signals and further processes them. The processed digital signals are sent to the air conduction speaker 91 via the conduction part, converted back into analog signals and amplified. Finally, the medical staff can hear the sound of the connecting shell 9 and the zygomatic arch through the air conduction speaker 91, that is, the sound generated by physical activities in the patient's chest. At the same time, in this process, the sound waves generated by the external environment can completely prevent the medical staff's ears from receiving sounds, and the sound is transmitted to the medical staff's body through bone conduction, thereby avoiding the interference of the external environment on the auscultation results.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A low-loss stethoscope, characterized in that: The invention comprises a noise reduction earmuff, a mounting tube (8) fixedly connected thereto, a connecting shell (9) connected to the mounting tube (8) and used for contacting the zygomatic arch, a connecting tube (10) fixedly connected to the mounting tube (8) and having elastic deformation performance, a hose (11) connected to the end of the connecting tube (10), and a pleural head (12) fixedly connected to the end of the hose (11), wherein the connecting tube (10) is Y-shaped, and the two sides of the upper end thereof are respectively connected to the two mounting tubes (8), and the lower end thereof is fixedly connected to the hose (11), and further comprises a monitoring circuit, wherein the monitoring circuit comprises a piezoelectric film sensor (121), an air conduction speaker (91), and a signal processor (13) coupling the two, wherein the piezoelectric film sensor (121) is arranged on the pleural head (12), and the air conduction speaker (91) is arranged in the connecting shell (9).

2. A low-loss stethoscope according to claim 1, characterized in that: The signal processor (13) includes an A / D converter (131) coupled to the piezoelectric film sensor (121), a filter (132) coupled thereto, and an audio processor (133) coupled to the filter (132), wherein the output end of the audio processor (133) is coupled to the air conduction speaker (91).

3. A low-loss stethoscope according to claim 2, characterized in that: The piezoelectric film sensor (121), the air conduction speaker (91), the A / D converter (131), the filter (132), and the audio processor (133) are all connected via wires.

4. A low-loss stethoscope according to claim 1, characterized in that: The noise reduction earmuffs comprise a headband (1), extension pieces (3) fixedly connected to both ends of the headband, and earmuffs (4) fixedly connected to the extension pieces (3), wherein the earmuffs (4) on both sides are provided with a primary noise reduction component and a secondary noise reduction component on the sides facing each other.

5. A low-loss stethoscope according to claim 4, characterized in that: The primary noise reduction component comprises a connecting rod (6) fixedly connected to the earmuff (4), and an earplug (7) fixedly connected to the connecting rod (6), wherein the earplug (7) is made of soft rubber material.

6. A low-loss stethoscope according to claim 4, characterized in that: The secondary noise reduction component comprises an ear pad (5) fixedly connected to the earmuff (4) and surrounding the outer ring of the primary noise reduction component, and the ear pad (5) is made of memory foam material.

7. A low-loss stethoscope according to claim 4, characterized in that: A layer of sponge pad (2) is fixedly connected to the inner ring of the headband (1).

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