WO2017215277A1

WO2017215277A1 - Phonendoscope based on piezoelectric thin film

Info

Publication number: WO2017215277A1
Application number: PCT/CN2017/073517
Authority: WO
Inventors: 张贯京
Original assignee: 深圳市前海康启源科技有限公司
Priority date: 2016-06-17
Filing date: 2017-02-14
Publication date: 2017-12-21
Also published as: CN205795719U

Abstract

Disclosed is a phonendoscope based on a piezoelectric thin film (11), comprising a stethoscope head (1), a sound amplifying device (2), a sound guiding pipe (3), a listening pipe (4) and earphones (5). The stethoscope head (1) comprises a sound sensor (10). The sound amplifying device (2) comprises a sound collector (21) and a sound amplifier (22). One end of the sound collector (21) is connected to the sound sensor (10), the other end of the sound collector (21) is connected to one end of the sound amplifier (22), the other end of the sound amplifier (22) is connected to one end of the sound guiding pipe (3), the other end of the sound guiding pipe (3) is connected to a lower end branch pipe (41) of the listening pipe (4). The listening pipe (4) comprises one lower end branch pipe (41) and two lateral branch pipes (42). The sound sensor (10) collects auscultation sound from a patient, an outer surface of the sound sensor (10) is provided with the piezoelectric thin film (11). The piezoelectric thin film (11) comprises an aluminium foil layer (111), a polyvinylidene fluoride layer (112) and a carrier layer (113), wherein the polyvinylidene fluoride layer (112) is located between the aluminium foil layer (111) and the carrier layer (113). The earphones (5) play the auscultation sound from the patient, so that a doctor performs auscultation for the patient. The phonendoscope can effectively avoid interference of external environmental sound, and improve sensitivity and accuracy of the stethoscope head (1) in collecting various auscultation sounds in the chest of a patient.

Description

Title of Invention: Amplified Stethoscope Based on Piezoelectric Film

Technical field

[0001] The present invention relates to the field of medical device technology, and in particular to a loudspeaker based on a piezoelectric film.

[0002] Stethoscopes are often used as an auxiliary diagnostic tool in the diagnosis and treatment of hospitals. Now doctors use a stethoscope to determine the frequency of heart activity and the presence or absence of valve murmurs, respiratory rhythms, and normal and abnormal breathing sounds to diagnose a disease that a patient may have. After the doctor has performed the auscultation, the auscultation head is attached to the patient's chest, and the earplugs are inserted into the ear for listening and diagnosis of the auscultation sound. At present, doctors often use ordinary stethoscopes to diagnose medical conditions after undergoing internal medicine auscultation. Ordinary stethoscopes collect the auscultation sounds of patients' chests and are easily affected by external environmental sounds, resulting in low accuracy of auscultation sounds, thus affecting doctors' auscultation results.

technical problem

[0003] The main purpose of the present invention is to provide a loudspeaker based on a piezoelectric film, which aims to solve the problem that the auscultation sound of the patient is generally affected by the external environment sound and the accuracy of the auscultation sound is low.

Problem solution

Technical solution

[0004] In order to achieve the above object, the present invention provides a loudspeaker based on a piezoelectric film, comprising an auscultation head, a sound amplifying device, a sound tube and a listening tube, the auscultation head comprising an acoustic sensor, The sound amplification device includes a sound collector and a loudspeaker, one end of the sound mixer is connected to the sound sensor, and the other end of the sound mixer is connected to the loudspeaker, and the loudspeaker is connected to the soundproofer One end of the sound tube, the other end of the sound tube is connected to the lower end branch of the listening tube, the listening tube comprises a lower branch tube and two left and right branch tubes, wherein:

[0005] The sound sensor is configured to collect a patient's auscultation sound from a chest of a patient, and the outer surface of the sound sensor is provided with a piezoelectric film including an aluminum foil layer, a polyvinylidene fluoride layer and a carrier layer, the aluminum foil Floor Located in an upper layer of the piezoelectric film, the carrier layer is located under the piezoelectric film, and the polyvinylidene fluoride layer is located between the aluminum foil layer and the carrier layer;

[0006] The ends of the left and right branch pipes of the listening tube are respectively provided with an earphone for playing a patient's auscultation sound for the doctor to auscultate the patient.

[0007] Preferably, the sound collector includes a recording unit for receiving a patient's listening sound from the sound sensor, and recording the patient's auscultation sound and storing it as a sound file.

[0008] Preferably, the loudspeaker comprises a sound amplifying circuit for amplifying the patient's auscultation sound and transmitting the amplified auscultation sound to the sound tube.

[0009] Preferably, the sound guiding tube is a rubber hose for transmitting a patient's auscultation sound into the listening tube.

[0010] Preferably, the lower end branch pipe and the left and right branch pipes of the listening tube constitute a Y-shaped structure.

[0011] Preferably, a spring support plate is disposed between the two left and right branch pipes of the listening tube.

[0012] Preferably, the earphone is a soft soundproof earplug with a concealed double ear spring.

[0013] Preferably, the sound amplifying device further comprises a micro battery, which is a solar battery or a rechargeable lithium battery, and is used for providing a working power supply for the amplified stethoscope.

Advantageous effects of the invention

Beneficial effect

Compared with the prior art, the piezoelectric film-based sound amplification stethoscope of the present invention adopts the above technical solution, and achieves the following beneficial effects: The piezoelectric film in the auscultation head is used, and the bioelectric vibration is perceived. The ability is strong and the external sound interference is reduced, thereby effectively avoiding the influence of the external environment sound, and improving the sensitivity and accuracy of the auscultation head to collect various auscultation sounds of the patient's chest.

Brief description of the drawing

DRAWINGS

1 is a schematic perspective view of a preferred embodiment of a loudspeaker based on a piezoelectric film according to the present invention; [0016] FIG. 2 is a schematic view showing the structure of a piezoelectric film in a loudspeaker based on a piezoelectric film of the present invention;

3 is a schematic view showing the internal connection of a preferred embodiment of a loudspeaker based on a piezoelectric film according to the present invention.

[0018] The purpose of the present invention, functional features and advantages will be further described in conjunction with the embodiments with reference to the accompanying drawings. BEST MODE FOR CARRYING OUT THE INVENTION

BEST MODE FOR CARRYING OUT THE INVENTION

The specific embodiments, structures, features and functions of the present invention are described in detail below with reference to the accompanying drawings and preferred embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

1, FIG. 2 and FIG. 3, FIG. 1 is a schematic perspective view of a preferred embodiment of a loudspeaker based on a piezoelectric film according to the present invention; FIG. 2 is a sound reinforcement based on a piezoelectric film of the present invention. Schematic diagram of the structure of the piezoelectric film in the stethoscope; FIG. 3 is a schematic diagram of the internal connection of the preferred embodiment of the loudspeaker based on the piezoelectric film of the present invention.

[0021] In the embodiment, the amplified stethoscope includes an auscultation head 1, a sound amplifying device 2, a sound tube 3, a listening tube 4, and an earphone 5. The listening tube 4 is a Y-shaped structure comprising a lower end branch 41 and two left and right branch tubes 42. The auscultation head 1 is connected to one end of the sound guiding tube 3 through a sound amplifying device 2, and the other end of the sound guiding tube 3 is connected to the lower end branch tube 41 of the listening tube 4, and the left and right of the listening tube 4 An earphone 5 is disposed at the end of the branch pipe 42, respectively.

[0022] The auscultation head 1 includes a sound sensor 10 including, but not limited to, a concentrator 21, a microphone 22, and a micro battery 23. One end of the horn 21 is connected to the sound sensor 10, and the other end is connected to a microphone 22, which is connected to the sound guiding tube 3. The sound sensor 10 is used to collect various auscultation sounds of a patient's chest, including but not limited to, heartbeat, breathing sound, pleural friction noise, lung wheezing, bowel sounds, etc., and transmitting the patient's auscultation sound to the place The concentrator 21 is described. The sound sensor 10 is a prior art sound sensing device, which is not specifically described in this embodiment.

[0023] In the embodiment, the outer surface of the sound sensor 10 is provided with a piezoelectric film 11. As shown in FIG. 2, the piezoelectric film 11 includes an aluminum foil layer 111, a polyvinylidene fluoride layer 112, and a carrier layer. 113, wherein the aluminum foil layer 111 is located in an upper layer of the piezoelectric film 11, the carrier layer 113 is located in a lower layer of the piezoelectric film 11, and the polyvinylidene fluoride layer 112 is located in the aluminum foil layer 111 and the carrier layer 113. In the middle, the surface of the aluminum foil layer 11 1 , the polyvinylidene fluoride layer 112 and the carrier layer 113 are closely adhered to form a unitary structure. In the present embodiment, the aluminum foil layer 111 disposed on the upper layer of the piezoelectric film 11 fully utilizes the thin and light characteristics of the aluminum foil, and has the advantages of strong bio-oscillation sensing capability and reducing external sound interference, thereby effectively avoiding the external environment. Sound influence, enhance the sensitivity and accuracy of the sound sensor 10 to collect various auscultation sounds of the patient's chest

[0024] The concentrator 21 includes a recording unit for receiving a patient's auscultation sound from the sound sensor 10, and recording various auscultation sounds of the patient and storing them as sound files for the doctor to perform on the patient. Confirmed or facilitated clinical research.

[0025] The loudspeaker 22 includes a sound amplifying circuit for amplifying the auscultation sound of the patient and transmitting the amplified auscultation sound to the sound guiding tube 3.

The micro battery 23 is a solar battery or a rechargeable lithium battery for providing a working power source for the amplified stethoscope. The microbattery 23 has low radiation and low power consumption characteristics, and does not affect the health of doctors and patients.

[0027] The sound guiding tube 3 is a rubber hose for transmitting the auscultation sound of the patient to the listening tube 4, and playing the auscultation sound of the patient through the earphone 5 for the doctor to auscultate the patient. Since the sound guiding tube 3 is a rubber hose, it is very soft and easy to bend, so that the sound amplifying stethoscope can be folded along the sound guiding tube 3 to be conveniently carried by a doctor.

[0028] A spring support plate 6 is disposed between the two left and right branch pipes 42 of the listening tube 4, and the left and right branch pipes 42 for supporting the listening tube 4 are arranged for the doctor to set on the left and right of the listening tube 4. The earphones 5 on the two branch pipes 42 are inserted into the left and right ears for auscultation of the patient.

[0029] The earphone 5 is a soft soundproof earplug with a concealed double ear spring, and the sealing performance and the sound insulation effect are quite good, since the earphone 5 is provided with a concealed double ear spring, which can be adjusted The ear tube is tight, thus increasing the comfort worn by the doctor.

[0030] After clinical use, the doctor inserts the earphone 5 into the ear and attaches the auscultation head 1 to the patient's chest to perform auscultation. When the doctor places the auscultation head 1 at the chest position of the patient, the auscultation head 1 collects the auscultation sounds of the various organs of the patient, and transmits the collected auscultation sounds to the concentrator 21. The loudspeaker 22 amplifies and transmits the patient's auscultation sound to the sound tube 3, and the doctor can hear the auscultation sound of each organ of the patient's chest by wearing the earphone 5 to auscultate the patient. The utility model adopts the aluminum foil layer 111 disposed on the upper layer of the piezoelectric film 11, which has the advantages of strong sensing ability for bioelectrical vibration and reducing external sound interference, thereby effectively avoiding the influence of external environment sound, and improving the auscultation head 1 to collect the patient's chest. Sensitivity and accuracy of various auscultation sounds. The above is only a preferred embodiment of the present invention, and thus does not limit the scope of the patent of the present invention, and the equivalent structure or equivalent function transformation made by the specification and the drawings of the present invention, or directly or indirectly In other related technical fields, the same is included in the scope of patent protection of the present invention.

Industrial applicability

Compared with the prior art, the piezoelectric film-based loudspeaker of the present invention adopts the above technical solution, and achieves the following beneficial effects: The piezoelectric film in the auscultation head is used, and the bioelectric vibration is perceived. The ability is strong and the external sound interference is reduced, thereby effectively avoiding the influence of the external environment sound, and improving the sensitivity and accuracy of the auscultation head to collect various auscultation sounds of the patient's chest.

Claims

claims

[Claim 1] A sound-amplifying stethoscope based on piezoelectric film, characterized in that the sound-amplifying stethoscope includes a stethoscope head, a sound amplifying device, a sound guide tube and a listening tube, the auscultation head includes a sound sensor, the The sound amplifying device includes a sound concentrator and a loudspeaker, one end of the sound concentrator is connected to the sound sensor, the other end of the sound concentrator is connected to the loudspeaker, and the loudspeaker is connected to the One end of the sound-conducting tube, and the other end of the sound-conducting tube is connected to the lower end branch pipe of the listening tube. The listening tube includes a lower end branch pipe and two left and right branch pipes, wherein: the sound sensor is used from The patient's chest collects the patient's auscultation sounds. The outer surface of the sound sensor is provided with a piezoelectric film. The piezoelectric film includes an aluminum foil layer, a polyvinylidene fluoride layer and a carrier layer. The aluminum foil layer is located on the upper layer of the piezoelectric film. The carrier layer is located at the lower layer of the piezoelectric film, and the polyvinylidene fluoride layer is located in the middle of the aluminum foil layer and the carrier layer; an earphone is provided at the end of the left and right branches of the listening tube, and the earphone is used for Play the patient's auscultation sounds for the doctor to auscultate the patient.

[Claim 2] The sound-amplifying stethoscope based on piezoelectric film according to claim 1, characterized in that the sound concentrator includes a recording unit for receiving the patient's auscultation sound from the sound sensor.

, and record the patient's auscultation sounds and store them as sound files.

[Claim 3] The loudspeaker stethoscope based on piezoelectric film according to claim 2, characterized in that the loudspeaker includes a sound amplification circuit for amplifying the patient's auscultation sound and amplifying the auscultation sound. The sound is sent to the sound guide tube.

[Claim 4] The sound-amplifying stethoscope based on piezoelectric film according to claim 3, characterized in that the sound-conducting tube is a rubber hose used to conduct the patient's auscultation sound to the listening sound. in the tube.

[Claim 5] The piezoelectric film-based sound amplifying stethoscope according to any one of claims 1 to 4, characterized in that the lower end branch pipe and the left and right branch pipes of the listening tube form a Y-shaped structure.

[Claim 6] The sound amplifying stethoscope based on piezoelectric film as claimed in claim 5, characterized in that a spring support plate is provided between the two left and right branch tubes of the listening tube.

[Claim 7] The sound-amplifying stethoscope based on piezoelectric film as claimed in claim 1, characterized in that the earphone is a soft sound-insulating earplug with a concealed double-layer ear piece spring.

[Claim 8] The sound-amplifying stethoscope based on piezoelectric film as claimed in claim 1, characterized in that: The amplification device also includes a micro battery, which is a solar cell or a rechargeable lithium battery, used to provide working power for the amplification stethoscope.