CN212729836U - Wireless stethoscope - Google Patents

Abstract

The utility model discloses a wireless stethoscope, which comprises a sound source contact part, a stethoscope core and a stethoscope handle, wherein the sound source contact part is used for being attached to a stethoscope body; the sound source transmission part is provided with a cavity transmission channel, the cavity transmission channel is provided with a first end and a second end along the extension direction of the cavity transmission channel, and the first end is connected with the sound source contact part; the sound source collecting part is connected with the second end; a sound source processing unit connected to the sound source collecting unit; and a sound source receiving unit wirelessly connected to the sound source processing unit. The utility model discloses can effectively realize doctor-patient's isolation, stethoscope SNR is high.

Description

Wireless stethoscope

Technical Field

The utility model relates to an auscultation technical field, concretely relates to wireless stethoscope.

Background

The stethoscope is a common tool for doctors, and has important application value in the aspects of respiratory system disease and cardiovascular disease diagnosis. With the development of more than two hundred years, the auscultation method has become an important diagnostic method for respiratory diseases.

Although the traditional stethoscope has the advantages of simple operation, low cost, wide application and the like, the traditional stethoscope cannot be used by medical personnel after the medical personnel wear protective clothing due to the high infectivity of respiratory diseases such as SARS, Ebola, COVID-19 and the like. Doctors urgently need but cannot use the stethoscope, and a large number of patients are delayed and misdiagnosed.

Some electronic stethoscopes are available in the market at present, but auscultation under the condition that a doctor wears protective clothing is not considered, and the structure of the stethoscope and the auscultation mode of the doctor are similar to those of the past stethoscopes. The conventional electronic stethoscope also fails.

At present, relevant patents and patent applications of electronic auscultation are designed by considering miniaturization, an audio collector (resistance type, capacitance type, electromagnetism and piezoelectric type) is placed in a stethoscope head, although the stethoscope is miniaturized, the noise is large, especially in an intensive care unit, various noises exist, especially the noises are extremely large when the noise is moved along the body of a patient and a stethoscope probe, the noises come from the interference of electronic circuits at the back of the stethoscope on the one hand and the interference at the back of the sound pickup probe on the other hand, and for example, the sound pickup probe collects sounds at the back of the stethoscope probe and the sounds of finger joint movement of a user. These noises have a great influence on the correct diagnosis of the doctor, and therefore, it is important to reduce the noise of the stethoscope.

Chinese patent publication No. CN201480020262 discloses an electronic stethoscope device, including: a bioacoustic sensing portion for sensing bioacoustics; a noise sensing section for sensing noise generated in the bioacoustic sensing process; a noise removing part for removing the sensed noise from the sensed bioacoustics and outputting the bioacoustics. This patent document provides a method of reducing noise, in which a noise removing section calculates a noise signal by using a sensing value output from a motion sensor, and can output a detected bioacoustic by filtering using the frequency of the noise signal. For example, the bioacoustic detection portion detects bioacoustics; an electrocardiogram signal detection unit detects an electrocardiogram signal; the noise removing section estimates a position of a heart sound from the detected bioacoustics using the detected electrocardiogram signal, and removes noise from the bioacoustics. Namely, in order to reduce noise, a noise reduction algorithm for appropriately removing noise is provided, and noise reduction is realized by software algorithm design, so that the process is complex.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problems of doctor-patient isolation and big noise of the stethoscope. The utility model provides a wireless stethoscope can effectively realize doctor-patient isolation, stethoscope SNR.

In order to solve the above technical problem, an embodiment of the present invention discloses a wireless stethoscope, which includes a sound source contact portion for attaching to a body to be auscultated; the sound source transmission part is provided with a cavity transmission channel, the cavity transmission channel is provided with a first end and a second end along the extension direction of the cavity transmission channel, and the first end is connected with the sound source contact part; a sound source collecting part connected with the second end; a sound source processing unit connected to the sound source collecting unit; and a sound source receiving unit wirelessly connected to the sound source processing unit.

Adopt above-mentioned technical scheme, when the doctor wore the protective clothing auscultation, sound source receiving portion is worn to the ear, with the laminating of sound source contact site on one's body by the auscultation body (patient), sound source contact site transmits sound source collection portion with sound sources such as patient's heartbeat and breathing through the cavity transmission path of sound source transmission portion, sound source collection portion transmits these sound source signal for sound source processing portion, after handling, in sending the signal again to the sound source receiving portion that pairs with sound source processing portion wireless connection, owing to use wireless transmission, thereby realized the doctor and worn under the protective clothing condition and the patient between the auscultation of isolation. And, because the cavity transmission path that uses connects sound source contact site and sound source collection portion, compare in the mode of collecting the portion direct mount with the sound source in the metal connecting pipe that is connected with the sound source contact site, greatly reduced the noise that the sound source collection portion gathered, improved the SNR of wireless stethoscope, the stethoscope sound that the doctor heard like this is very similar with traditional stethoscope sound to the diagnostic exactness of protective clothing is worn to the doctor has been improved.

According to another embodiment of the present invention, the length of the cavity transfer channel is between 35cm and 50 cm.

According to another embodiment of the present invention, the cavity transmission channel is a soft cavity transmission channel.

According to another embodiment of the present invention, the sound source collecting unit can collect sound in a frequency band of 20Hz to 50 Hz.

According to another embodiment of the present invention, the sound source contact portion includes: the operation portion and the contact site that are connected, sound source transmission portion with the operation portion is connected, the operation portion is used for supplying the user operation sound source contact site, the contact site is used for laminating in by the auscultation body, the top surface of operation portion extremely the distance of the bottom surface of contact site is between 20mm to 30 mm.

According to another embodiment of the present invention, the distance from the top surface of the operating portion to the bottom surface of the contact portion in a direction perpendicular to the contact surface of the contact portion is between 20mm and 30 mm.

According to another embodiment of the present invention, the operation portion is made of metal.

According to another embodiment of the invention, the contact portion comprises a suspended membrane.

According to the utility model discloses a further embodiment, be equipped with the MIC of making an uproar of falling on the sound source processing part.

According to the utility model discloses a further embodiment still includes the metal connecting pipe, metal connecting pipe one end with the sound source contact site is connected, the other end with first end is connected.

According to the utility model discloses a further embodiment, the sound source contact site is the stethoscope probe, sound source transmission portion is the hose, sound source collection portion is the adapter, sound source processing portion includes control circuit board, control circuit board is equipped with wireless communication module, sound source receiving part is wireless earphone, wireless earphone with wireless communication module wireless connection.

According to another embodiment of the present invention, the hose is a latex hose or a rubber hose.

According to the utility model discloses a further embodiment, wireless communication module is bluetooth audio communication module, wireless earphone is bluetooth headset.

According to another embodiment of the present invention, the sound pickup is one of microphones based on a resistive type, a capacitive type, an electromagnetic type, or a piezoelectric type.

According to another embodiment of the present invention, the sound pickup is a condenser electret microphone.

According to another embodiment of the present invention, the condenser electret microphone is a unidirectional condenser electret microphone.

According to the utility model discloses a further embodiment, control circuit board still includes microprocessor, storage module, signal amplification filter circuit, battery, wireless connection state indication LED, power on state indication LED, button, charge or external power source interface, microprocessor indicates LED, power on state indication LED, button, charge or external power source interface electricity with storage module, signal amplification filter circuit, battery, wireless connection state indication LED respectively, power on state, the adapter with signal amplification filter circuit electricity is connected, wireless communication module's microprocessor is integrated in microprocessor.

According to the utility model discloses a further embodiment, control circuit board still includes microprocessor, storage module, signal amplification filter circuit, battery, wireless connection state indication LED, power on state indication LED, button, charge or external power source interface, microprocessor respectively with storage module, signal amplification filter circuit, battery, wireless connection state indication LED, power on state indication LED, button, charge or external power source interface wireless communication module electricity is connected, the adapter with signal amplification filter circuit electricity is connected.

According to the utility model discloses a further embodiment, control circuit board still includes the audio output mouth, the audio output mouth with microprocessor and/or signal amplification filter circuit connects.

According to the utility model discloses a further embodiment, microprocessor internal integration has charge management, the digit falls makes an uproar, wireless connection state instructs LED and power on state instructs LED, signal acquisition, the microprocessor of button management.

According to the utility model discloses a further embodiment, the sound source receiving part is two at least, each the sound source receiving part can respectively with sound source processing part wireless connection, each the sound source receiving part is used for supplying a user to wear.

According to the utility model discloses a further embodiment, sound source processing part includes wireless audio frequency transmitter, each sound source receiving part can with wireless audio frequency transmitter wireless connection.

According to the utility model discloses a further embodiment, each sound source receiving part is wireless earphone, each wireless earphone can with wireless audio transmitter wireless connection.

According to the utility model discloses a further embodiment still includes at least one wireless audio receiver, wireless audio receiver with wireless audio transmitter wireless connection, each the sound source receiving part is wired earphone, each wired earphone can with wireless audio receiver wired connection.

According to the utility model discloses a another embodiment still includes at least one wireless audio receiver, wireless audio receiver with wireless audio transmitter wireless connection, at least two in the sound source receiving part partly be wired earphone, another part is wireless earphone, wireless earphone can with wireless audio transmitter wireless connection, wired earphone can with wireless audio receiver wired connection.

According to another specific embodiment of the present invention, the wireless audio transmitter is embedded with a high-pass CRS8670 bluetooth chip or a high-pass CRS8675 bluetooth chip.

According to the utility model discloses a further embodiment, sound source processing portion includes signal amplification filter circuit, signal amplification filter circuit includes preamplification circuit and band-pass filter circuit, signal amplification filter circuit's passband is cut to the frequency and is 24Hz to 3332Hz, and whole passband amplification gain is 34.8 dB.

According to the utility model discloses a further embodiment, preamplification circuit includes band pass filter, band pass filter circuit includes at least one band pass filter, each band pass filter's component structure is the same.

According to another embodiment of the present invention, the passband cutoff frequency of the preamplifier circuit is 12Hz to 9500Hz, and the passband amplification gain is 24 dB; the band-pass filter circuit comprises three band-pass filters, the cut-off frequency of the pass band of each band-pass filter is 10Hz to 7000Hz, and the amplification gain of the pass band is 3.6 dB.

According to another embodiment of the utility model, still include the sound-proof housing, encircle the sound source contact site sets up, and can with by the laminating of auscultation body.

According to the utility model discloses a another embodiment still includes the auscultation handle, extends along the first direction, the first direction is the perpendicular to the sound source contact site laminate in by the direction of the contact surface of the auscultation body, follow the first direction, auscultation handle one end stretches into in the sound-proof housing, the other end is located supply the user operation outside the sound-proof housing the sound source contact site.

According to the utility model discloses a further embodiment, the auscultation handle is the cavity body, follows the first direction, the cavity body is including the first portion, second portion and the third portion that are connected, the first portion with the pickup cavity of sound source contact site is connected, the second portion with the sound-proof housing is connected, the third portion with sound source transmission portion connects.

Drawings

Fig. 1 is a schematic structural diagram of a wireless stethoscope according to an embodiment of the present invention;

fig. 2 is a first perspective view of a wireless stethoscope according to an embodiment of the present invention;

fig. 3 is a second perspective view of the wireless stethoscope according to the embodiment of the present invention;

fig. 4 is a side view of a wireless stethoscope according to an embodiment of the present invention;

fig. 5 is a first hardware block diagram of the control circuit board in the wireless stethoscope according to the embodiment of the present invention;

fig. 6 is a hardware block diagram ii of the control circuit board in the wireless stethoscope according to the embodiment of the present invention;

FIG. 7 is a diagram illustrating the relationship between the length of the hose and the strength of the audio signal in the wireless stethoscope according to the embodiment of the present invention;

fig. 8 is a third perspective view of the stethoscope according to the embodiment of the present invention;

fig. 9 is a top view of a stethoscope according to an embodiment of the present invention;

FIG. 10 is a sectional view taken along line A-A of FIG. 9;

fig. 11 is a perspective view of a auscultation handle in the stethoscope according to the embodiment of the present invention;

fig. 12 is a schematic structural diagram of a stethoscope according to an embodiment of the present invention;

fig. 13 is a schematic structural diagram three of a stethoscope according to an embodiment of the present invention;

fig. 14 is a schematic structural diagram of a stethoscope according to an embodiment of the present invention.

Detailed Description

The following description is provided for illustrative embodiments of the present invention, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. While the invention will be described in conjunction with the preferred embodiments, it is not intended that features of the invention be limited to only those embodiments. On the contrary, the intention of implementing the novel features described in connection with the embodiments is to cover other alternatives or modifications which may be extended based on the claims of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be practiced without these particulars. Furthermore, some of the specific details are omitted from the description so as not to obscure or obscure the present invention. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

It should be noted that in this specification, like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

In the description of the present embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are usually placed in when used, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or the element to which the present invention is directed must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present embodiment, it should be further noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected," and "connected" are to be interpreted broadly, e.g., as a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present embodiment can be understood in specific cases by those of ordinary skill in the art.

In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Referring to fig. 1, the utility model provides a wireless stethoscope, include: a sound source contact part 1 for being attached to an auscultated body (e.g., a patient); a sound source transmission part 3, provided with a cavity transmission channel 30, wherein the cavity transmission channel 30 has a first end and a second end along the extending direction of the cavity transmission channel 30, optionally, the first end and the second end are the head and tail ends of the cavity transmission channel 30 of the sound source transmission part 3, wherein the first end is connected with the sound source contact part 1; the sound source collecting part 4 is connected with the second end, and optionally, the sound source collecting part 4 is plugged into a cavity of the second end; a sound source processing unit 5 connected to the sound source collecting unit 4; and a sound source receiving unit 13 wirelessly connected to the sound source processing unit 5.

Optionally, the wireless stethoscope further includes a metal connection pipe 2, one end of the metal connection pipe 2 is connected to the sound source contact part 1, and the other end is connected to the first end. That is, the metal connection pipe 2 functions to connect the sound source contact part 1 and the sound source transmission part 3.

By adopting the technical scheme, when highly infectious diseases such as respiratory diseases like SARS, Ebola, COVID-19 and the like occur, medical staff need to wear protective clothing for safe visit, when doctors wear the protective clothing to auscultate, the ears wear the sound source receiving part 13, the sound source contact part 1 is attached to the body of the auscultated body (patients), the sound source contact part 1 transmits the heartbeat and the breathing of the patients and other sound sources to the sound source collecting part 4 through the cavity transmission channel 30 of the sound source transmission part 3, the sound source collecting part 4 transmits the sound source signals to the sound source processing part 5, and the signals are transmitted to the sound source receiving part 13 which is in wireless connection and matching with the sound source processing part 5 after being processed, thereby realizing the auscultation isolated from the patients under the condition that the doctors wear the protective clothing, and being safe and not influencing the auscultation.

And, because the cavity transmission path 30 that uses connects sound source contact site 1 and sound source collection portion 4, compare in the mode of collecting sound source portion 4 direct mount in the metal connecting pipe 2 that is connected with sound source contact site 1, greatly reduced the noise that sound source collection portion 4 gathered, improved the SNR of wireless stethoscope, the stethoscope sound that the doctor heard like this is very similar with traditional stethoscope sound to the diagnostic correct rate of doctor's dress protective clothing has been improved. Therefore, the utility model discloses a cavity transmission channel 30 effectively falls and makes an uproar, need not to use software algorithm to realize falling and make an uproar like prior art, but just has realized falling through mechanical structure's design and has fallen and make an uproar, and the process of making an uproar is simple, the cost is reduced.

In addition, the curse of the university of inner Mongolia of the skilled person is thought in the Master academic thesis "design of electronic stethoscope" (subscript 12 pages): the shorter the sound guide tube is, the larger the amplitude of the output signal of the acquisition auditory head is, and the better the sound transmission effect is; i.e. the shorter the length of the cavity transmission channel 30, the better the sound transmission effect and the better the noise reduction effect.

However, the applicant of the present invention has studied to draw a conclusion contrary to the idea of the above-mentioned paper, and the applicant believes that the shorter the length of the cavity transmission channel 30 is, the more the noise reduction is facilitated. The applicant uses Power Lab software to test samples, and places the wireless stethoscope on the left chest, then, by adjusting the cavity transmission channel 30 at intervals of 5cm in length, ranging from 5cm to 70cm, the signal intensity of the audio output port is respectively acquired, and the relationship between the length of the cavity transmission channel 30 and the audio signal intensity is shown in fig. 7, through this experiment, it can be seen that when the cavity transfer channel 30 is 35cm to 50cm in length, including 35cm and 50cm, e.g., 38cm, 42cm, etc., the audio signal strength is stable, and the inventors have found that, when the length of the cavity transmission channel 30 is greater than 50cm or less than 35cm, the audio signal strength of the audio signal becomes smaller, so that the length of the selected cavity transmission channel 30 is in the optimal cavity transmission channel length range of 35cm to 50cm, and in specific application, other parameter ranges can be selected according to requirements.

Further, the cavity transfer channel 30 is a soft cavity transfer channel. That is, the sound source transmission part 3 is made of a soft material, and optionally, the sound source transmission part 3 is a latex hose or a rubber hose. This is advantageous for auscultation detection on the one hand, and on the other hand, the use of the soft cavity transmission channel 30 can also have a beneficial effect on noise reduction,

the intensity of the audio signal is stable, and the sound source received by the sound source receiving part 13 is clear, which is beneficial to diagnosis.

Further, sound of 20Hz to 50Hz frequency channel can be gathered to sound source collection portion 4, including 20Hz and 50Hz frequency channel. After setting up like this, can prevent that the sound of some low-frequency channels can't be gathered by the stethoscope, avoid doctor's misdiagnosis. Further optionally, sound collection unit 4 can gather the sound of 20Hz to 10000Hz frequency channel.

Further, referring to fig. 2 to 4, the sound source contact part 1 includes: an operation part 15 and a contact part 16 connected, the sound source transmission part 3 is connected with the operation part 15, the operation part 15 is used for the user to operate the sound source contact part 1, the contact part 16 includes but not limited to a suspension film for fitting to the auscultated body, the distance H from the top surface of the operation part 15 to the bottom surface of the contact part 16 is between 20mm and 30mm, including 20mm and 30mm, for example 26 mm. Alternatively, the distance from the top surface of the operating portion 15 to the bottom surface of the contact portion 16 in the direction perpendicular to the contact surface of the contact portion 16 (indicated by the X direction in fig. 4) is between 20mm and 30 mm.

When the doctor operates the operation portion 15 to auscultate, the noise is very loud when the contact portion 16 moves along the body of the patient and the sound source contact portion 1, and on one hand, the noise is caused by interference behind the sound source contact portion 1, for example, the sound source collection portion 4 collects sounds such as finger joint movement of the user at the operation portion 15. By setting the above distance range from the top surface of the operation portion 15 to the bottom surface of the contact portion 16, noise can be effectively reduced, so that the intensity of an audio signal is stable, and a sound source received by the sound source receiving portion 13 is clear, which is favorable for diagnosis.

Alternatively, referring to fig. 2, the operation portion 15 is "narrow on top and wide on bottom" and the "narrow" portion 152 is for the user to manipulate the operation portion 15, on the one hand, to facilitate the user's operation, and on the other hand, to reduce the weight of the sound source contact portion 1. The "wide" portion 151 is connected to the contact portion 16, and the shapes thereof match. In this embodiment, the "wide" portion 151 and the contact portion 16 are both cylindrical.

Further, the operation portion 15 is made of a metal material. The metal material may be copper, stainless steel, or other metal material. The operation portion 15 uses metal material, further plays the effect of making an uproar again for audio signal intensity is more stable, and the sound source that receives through sound source receiving portion 13 is more clear, more does benefit to the diagnosis.

Further, the sound source processing unit 5 is provided with a noise reduction MIC 14. Optionally, sound source processing portion 5 is equipped with the casing, and the casing has the cavity of making an uproar of falling, and the MIC14 of making an uproar of falling is located and is fallen in the cavity of making an uproar, and the MIC14 of making an uproar of setting further plays the effect of making an uproar of falling again for audio signal intensity is more stable, and the sound source of receiving through sound source receiving portion 13 is more clear, more does benefit to the.

In this embodiment, sound source contact site 1 is the stethoscope probe, sound source transmission portion 3 is the hose, sound source collection portion 4 is the adapter, sound source processing portion 5 includes control circuit board, control circuit board is equipped with wireless communication module, sound source receiving portion 13 is wireless earphone, wireless earphone with wireless communication module wireless connection. Stethoscope probe (sound source contact part 1) is connected with the one end of metal connecting pipe 2, and adapter (sound source collection part 4) is connected with control circuit board (sound source processing part 5) electricity, and the pot head of hose (sound source transmission part 3) is served at one of metal connecting pipe 2 keeping away from stethoscope probe (sound source contact part 1), and adapter (sound source collection part 4) has been filled in to the other end of latex hose (sound source transmission part 3).

Optionally, the hose is a latex hose or a rubber hose. Optionally, the wireless communication module is a bluetooth audio communication module, the wireless headset is a bluetooth headset, and the bluetooth headset (sound source receiving part 13) is paired with the bluetooth audio communication module for use.

The utility model discloses a latex hose's one end is filled in to the adapter, latex hose's the other end and the metal connecting pipe 2 that is connected with stethoscope probe are connected, the stethoscope probe passes through metal connecting pipe 2 and latex hose with patient's heartbeat and respiratory signal and transmits the adapter, the adapter is the signal of telecommunication with these signal conversion, behind the signal amplification filter circuit, after microprocessor internal program handles, send the signal to with this wireless pairing's wireless earphone through the wireless communication module of microprocessor internal integration or independent setting again, because wireless connection is wireless transmission, thereby realized doctor and worn under the protective clothing condition and the patient between the auscultation of isolation. The adapter is connected to the stethoscope probe through the hose that length is 35cm to 50cm, compares in the mode of with adapter direct mount in the metal connecting pipe 2 that is connected with the stethoscope probe, greatly reduced the noise that the adapter gathered, the stethoscope sound that the doctor heard like this is very similar with traditional stethoscope sound to realize that the doctor is when diagnosing that there is not the obstacle to switch between traditional stethoscope and the electron stethoscope.

In an embodiment, the sound pickup (sound source collecting part 4) is selected from one of resistive, capacitive, electromagnetic or piezoelectric microphones, preferably a capacitive electret microphone, and more preferably a unidirectional capacitive electret microphone.

In a specific embodiment, as shown in fig. 1 and 5, the control circuit board (sound source processing portion 5) includes a microprocessor, a storage module, a signal amplification filter circuit, a battery, a key, an audio output port 11, a charging or external power interface 12, the LEDs shown in fig. 5 and 6 may include a wireless connection status indication LED 6 and a power-on status indication LED 7, the microprocessor is electrically connected to the storage module, the signal amplification filter circuit, the battery, the wireless connection status indication LED, the power-on status indication LED, the key, the audio output port 11, the charging or external power interface 12, the sound pickup (sound source collecting portion 4) is electrically connected to the signal amplification filter circuit, the key may include a power-on/off key 9, a volume-up key 8 and a volume-down key 10, the key may be a mechanical key, a touch key, a photosensitive key, etc., the power-on/off key 9 may control the power-on/off of, when not using, with control circuit board shutdown, even the doctor does not take off wireless earphone, the ear also can not receive the interference of noise, and volume increase button 8 and volume reduce button 10 can adjust the volume, also can clearly carry out the auscultation to the doctor that the hearing is not good.

In some embodiments, the microprocessor is either a microprocessor that has integrated a bluetooth audio communication module, as shown in fig. 6; or a general microprocessor without an integrated bluetooth audio communication module is selected, as shown in fig. 5. When the common microprocessor without the integrated Bluetooth audio communication module is selected, the control circuit board further comprises an independent Bluetooth audio communication module, the Bluetooth audio communication module is connected with the common microprocessor, and the storage module preferably adopts a pluggable memory such as a removable storage device such as a U disk, a TF card, an SD card, a mobile hard disk and the like, and the battery can be a disposable battery or a rechargeable lithium battery. The storage module can store and export the auscultation information of the patient and perform subsequent analysis.

In the above embodiment, the audio output port 11 is connected to the microprocessor, and in some embodiments, the audio output port 11 may also be directly connected to the signal amplification filter circuit before signal acquisition of the microprocessor, that is, the audio output port is connected to the signal amplification filter circuit. In still other embodiments, the audio output port is connected to both the microprocessor and the signal amplification and filtering circuit

Set up audio output port 11, when being used for doctor-patient isolation state down doctor's use, also can be used to doctor's daily use, doctor's ear need be plugged up in order to reach two auscultation pipes of good auscultation effect to traditional stethoscope, the doctor is uncomfortable, wireless stethoscope can enlarge through the audio frequency, filtering treatment, the doctor inserts the earphone and just can come the auscultation through the earphone with the audio output port, the doctor both can hear the better case sound of tone quality like this, also relatively more comfortable during the auscultation.

In a specific embodiment, the microprocessor is internally integrated with indication control, signal acquisition and key management such as charging management, digital noise reduction, wireless connection state indication LED, startup state indication LED and the like.

There are many technical mature microprocessors on the market and finished products such as NRF52832NRF52840CSR8675CSR8670AP8048A BT321F AC690N/AC692N, which integrate charging management, digital noise reduction, LED indication control, signal acquisition, key management and bluetooth audio communication modules inside, and their internal programs are set up in relation to the technical specifications of these mature products, such as hao Beisi bluetooth 5.0 receiving transmitter, green bluetooth 5.0 transmitting receiver, etc., and will not be described in detail herein. For a common microprocessor without an integrated bluetooth audio communication module, microprocessors such as STM32 series chips, MSP430, and FPGA (programmable logic array) may be selected, which are also very mature finished products, and the connection and composition between components of the control circuit board are also conventional circuits, which can be referred to specifically. For example, the application of STM32 single chip microcomputer and the practice of the whole case, the development of actual combat guideline (2 nd edition) of STM32 library: based on STM32F103, books such as TMS320F28335DSP principle, development and application have detailed introduction and routine.

The following are two specific applications of the present invention:

(1) under the condition of isolation of doctors and patients

The doctor wears the bluetooth headset, wears the protective clothing, and the bluetooth headset is worn with oneself and is belonged to the cleaning product. The stethoscope probe placing area does not have an isolation area and belongs to a pollutant. After the doctor enters the ward, the startup and shutdown key 9 on the wireless stethoscope is turned on, and after the Bluetooth headset and the stethoscope are automatically paired, the doctor can use the wireless stethoscope through the Bluetooth headset as if the doctor uses a common stethoscope.

(2) The doctor and the patient do not need to be isolated

Doctors and patients need not to keep apart the condition under, and the doctor uses the utility model discloses a wireless stethoscope is the same with using ordinary stethoscope, except using bluetooth headset auscultation, also can be through ordinary earphone auscultation. To the doctor that old hearing is not good, under the unable condition of using of traditional stethoscope, can preferentially use the utility model discloses a stethoscope.

Referring to fig. 8 to 11, the present invention further provides a stethoscope, including: the sound source contact part 1 and the sound source transmission part 3 according to the foregoing embodiments, that is, the sound source contact part 1 is used to be attached to a body to be auscultated, and one end of the cavity transmission channel 30 of the sound source transmission part 3 is connected to the sound source contact part 1. The stethoscope may be a wireless stethoscope as described in the previous embodiments, or may be a conventional stethoscope. In this embodiment, the end of the sound source contact portion 1 includes a suspension film 1b, and the suspension film 1b corresponds to the sound pickup cavity 1a of the sound source contact portion 1, and can be attached to the body to be auscultated. The stethoscope of this embodiment further includes a soundproof cover 50 provided around the sound source contact portion 1, and can be attached to the body to be auscultated.

Adopt above-mentioned technical scheme, on the one hand, the sound-proof housing 50 completely cuts off the entering noise behind the sound source contact site 1, and on the other hand, sound-proof housing 50 with by the laminating back of the auscultation body, sound-proof housing 50 completely cuts off the noise and gets into the route of the auscultation MIC 70 that the stethoscope later-mentioned between the contact surface of the auscultation body from sound source contact site 1, can be effectively with sound source contact site 1 with external sound completely cut off, realize making an uproar falls to improve the auscultation effect of stethoscope.

In one embodiment, referring to fig. 10, the soundproof cover 50 includes a cover body 51 and a soft attaching portion 52, the cover body 51 is made of a material having a soundproof effect, such as silica gel, soft gel, etc., the soft attaching portion 52 is used for attaching to the auscultated body, and the soft attaching portion 52 is, but not limited to, a soundproof cotton ring, and may also be made of other soundproof materials. In some embodiments, the soft fitting portion 52 is perpendicular to the mask body 51, facilitating user manipulation to fit the sound isolation cover 50 to the body being auscultated. The shape of the soundproof cover 50 is not limited, and may be a shape capable of providing a soundproof function. In this embodiment, referring to fig. 8 and 10, the cover 51 has a hollow conical shape, and the soft attachment portion 52 has a hollow ring shape.

With continuing reference to fig. 8, 10 and 11 and with further reference to fig. 1-4, the stethoscope further includes a stethoscope handle 60 extending in a first direction (indicated by direction X in fig. 10) perpendicular to the direction in which the sound source contact portion 1 is attached to the contact surface of the auscultated body, wherein one end of the stethoscope handle 60 extends into the sound-proof housing 50 and the other end thereof is located outside the sound-proof housing 50 for the user to operate the sound source contact portion 1. That is, the auscultation handle 60 of the stethoscope of the present application is perpendicular to the sound source contact part 1.

Traditional stethoscope avoids the decay of audio frequency conduction in-process, and the stethoscope leading note pipe is than shorter, and medical personnel and patient's distance will press close to more has been decided to the structure of stethoscope sound pick-up head to guarantee that the stethoscope fully laminates patient skin, and closely contact the patient, lead to medical personnel to receive the infection easily. And this application sets up back with auscultation handle 60 perpendicular to sound source contact site 1, and the doctor exerts pressure perpendicularly through auscultation handle 60, adjusts the auscultation effect, compares in the parallel structure of traditional auscultation handle and pickup membrane, and the stethoscope structure of this application has increased doctor and patient's distance, has reduced the risk of infecting.

Specifically, referring to fig. 10 and 11, the auscultation handle 60 is a hollow tubular body including a first portion 63, a second portion 62 and a third portion 61 connected in the first direction, the first portion 63 is connected to the sound-collecting cavity 1a of the sound source contact part 1, the second portion 62 is connected to the soundproof cover 50, and the third portion 61 is connected to the sound source transmission part 3.

The specific connection manner of the components is not limited, in this embodiment, the first portion 63, the second portion 62 and the third portion 61 of the auscultation handle 60 are provided with external threads, the sound-collecting cavity 1a of the sound source contact portion 1 is provided with internal threads, the sound-insulating cover 50 is provided with internal threads, the sound source transmission portion 3 is provided with internal threads, and the auscultation handle 60 is respectively in threaded connection with the sound source contact portion 1, the sound-insulating cover 50 and the sound source transmission portion 3. In addition, the setting area of the external thread on the auscultation handle 60 is not limited, and the corresponding connection can be realized. In the present embodiment, referring to fig. 11, the entire area of the first portion 63 is provided with external threads, the partial area of the second portion 62 is provided with external threads, and the entire area of the third portion 61 is provided with external threads.

In some embodiments, the first portion 63 is provided with an auscultation MIC 70 at an end of the sound-collecting cavity 1a, and the auscultation MIC 70 collects sounds, such as heart sounds, lung sounds, etc., after the sound source contact portion 1 contacts the body surface of the patient. The cavity of the auscultation handle 60 can communicate with the cavity transmission passage 30 of the sound source transmission part 3 to transmit sounds collected by the auscultation MIC 70, such as heart sounds, lung sounds, etc., to enable the auscultation of the patient by the doctor.

With continuing reference to fig. 1 and with reference to fig. 5, 6 and 12 to 14, in some embodiments, the difference between the above embodiments is that in this embodiment, there are at least two sound source receiving portions 13 (wired headphones and wireless headphones, which will be described later), each sound source receiving portion 13 can be wirelessly connected to the sound source processing portion 5, and each sound source receiving portion 13 is used for being worn by one user. For example, the number of the sound source receiving units 13 is five, one sound source receiving unit 13 is worn by the teacher, and the remaining sound source receiving units 13 are worn by the students. After the stethoscope is arranged, when a teacher auscultates and gives lessons, the sound heard by the teacher through the stethoscope is the same as the sound heard by students, so that the sound such as cardiopulmonary sounds and the like described by the teacher is heard by the teacher, namely the sound such as cardiopulmonary sounds heard by the students, and therefore the students can also really know what the sound such as cardiopulmonary sounds and the like described by the teacher is, the stethoscope is favorable for auscultation and learning, and the stethoscope is convenient for the teacher to give lessons.

Referring to fig. 12, the sound source processing portion 5 includes wireless audio transmitters (i.e., the wireless communication modules of the foregoing embodiments), and each of the sound source receiving portions 13 is capable of wirelessly connecting with the wireless audio transmitter. In this embodiment, each of the sound source receiving portions 13 is a wireless earphone, and specifically, may be a wireless bluetooth earphone, and each of the wireless earphones can be wirelessly connected to the wireless audio transmitter. That is, the teacher and the student both wear wireless headphones. As described in the foregoing embodiments, after the sound source contact portion is attached to the auscultated body, the sound source passes through the sound pickup, and then is processed by the signal amplification and filtering circuit, and the audio is transmitted to the teacher and the students through the wireless audio transmitter.

Referring to fig. 13, in some possible alternative embodiments, the sound source receiving device further includes at least one wireless audio receiver, the wireless audio receiver is wirelessly connected to the wireless audio transmitter, one part of the at least two sound source receiving portions 13 is a wired earphone, the other part of the at least two sound source receiving portions is a wireless earphone, the wireless earphone can be wirelessly connected to the wireless audio transmitter, and the wired earphone can be wired to the wireless audio receiver. Namely, the wireless audio transmitter is directly connected with the wireless earphone worn by the teacher or the student in a wireless pairing mode on the one hand, and after the wireless audio transmitter is connected with the wireless audio receiver in a wireless pairing mode on the other hand, the wireless audio receiver outputs audio, and the audio is transmitted to the student or the teacher through the wired earphone after power amplification respectively. In this embodiment, the teacher wears wireless earphones, and the students wear wired earphones respectively. In some embodiments, it is also possible that the teacher wears wireless earphones, part of the students wears wired earphones, and part of the students wears wireless earphones.

Referring to fig. 14, in some possible alternative embodiments, the stethoscope further includes at least one wireless audio receiver, two of which are shown in fig. 14, but the number is not limited thereto. Each of the wireless audio receivers is wirelessly connected to the wireless audio transmitter, each of the sound source receiving parts 13 is a wired earphone, and each of the wired earphones is capable of being wired to the wireless audio receiver. That is, after each wireless audio receiver is connected with the wireless audio receiver in a wireless pairing manner, each wireless audio receiver outputs audio, and the audio is transmitted to students or teachers through wired earphones after power amplification.

Those skilled in the art can understand that there are many combinations of the sound source contact part and the wireless audio transmitter, the wireless audio transmitter can be connected to only one wireless audio receiver, the wireless audio receiver outputs signals, and different power amplifying circuits amplify audio signals and output the signals to wired earphones (both teachers and students can use the same). Some wireless audio transmitters may connect two wireless audio receivers, or one wireless headset with one audio receiver, or two wireless headsets, and thus have multiple implementations.

The wireless audio transmitter described in the above embodiments has a high-pass CRS8670 bluetooth chip or a high-pass CRS8675 bluetooth chip built therein. However, the wireless audio transmitter is not limited to using the high-pass CRS8670 bluetooth chip or the high-pass CRS8675 bluetooth chip, and any chip capable of transmitting an audio signal to a plurality of sound source contacts at the same time by one wireless audio transmitter may be used.

In addition, as described in the foregoing embodiment, the sound source collecting part 4 of the present invention can collect the sound in the frequency band of 20Hz to 50Hz, including the frequency band of 20Hz and 50 Hz. After setting up like this, can prevent that the sound of some low-frequency channels can't be gathered by the stethoscope, avoid doctor's misdiagnosis. The reason for this is explained in further detail:

due to the high infectivity of respiratory diseases such as SARS, Ebola, COVID-19, etc., a negative pressure isolation ward needs to be established, the stethoscope of the previous embodiment solves the problem that doctors wear protective clothing to use the stethoscope under the negative pressure isolation ward, the noise of the negative pressure isolation ward can reach A sound level noise (65dB to 68dB), the noise frequency is distributed in the extremely wide frequency band range of 60Hz to 8000Hz, and the decibels of different frequency bands are different. The applicant can know that the environmental interference is distributed in the range of 10Hz to 5000Hz by analyzing the critical illness interference data of the fire mountain hospital. The frequency range of the lung breath sound of the human body is 50Hz to 3000Hz, the frequency range of the bowel sound is 60Hz to 1200Hz, the frequency range of the heart sound signal is 200Hz to 400Hz, the first heart sound with large loudness and clear identification is the first heart sound, and the frequency of the second heart sound is concentrated in 20Hz to 100 Hz. Therefore, the environmental interference signals and the audio signals emitted by the physiological activities of the human body are highly mixed, and the auscultation of doctors is seriously influenced.

For effectively making sound collection portion 4 can gather the sound of 20Hz to 50Hz frequency channel, the utility model discloses a signal amplification filter circuit in sound source processing portion 5 includes preamplification circuit and band-pass filter circuit, signal amplification filter circuit's passband is cut to the frequency and is 24Hz to 3332Hz, and whole passband amplification gain is 34.8 dB. After the signal amplification and filtering circuit is arranged, the sounds such as heart sounds and breath sounds of 20Hz to 50Hz frequency bands can be collected, the sounds of low frequency bands can be prevented from being collected by the stethoscope, and misdiagnosis of doctors is avoided.

Specifically, the preamplifier circuit comprises a band-pass filter, the band-pass filter circuit comprises at least one band-pass filter, and the band-pass filters are identical in composition structure. Those skilled in the art will appreciate that the bandpass filter can be configured with corresponding circuit configurations based on the passband cut-off frequency and the passband amplification gain, including the use of resistors, capacitors, operational amplifiers, and the like. In one embodiment, the components are the same, and the connection mode of the components is the same. The band-pass filter has the same composition structure, and the circuit has the characteristic of convenient debugging, so that the aims of modifying the passband amplification gain and the passband cut-off frequency range can be fulfilled only by adjusting the resistance capacitance value without modifying the original structure of the circuit.

Furthermore, the passband cut-off frequency of the preamplifier circuit of the utility model is 12Hz to 9500Hz, and the passband amplification gain is 24 dB; the band-pass filter circuit comprises three band-pass filters, the cut-off frequency of the pass band of each band-pass filter is 10Hz to 7000Hz, and the amplification gain of the pass band is 3.6 dB. By using Multisim simulation, after the signal amplification filter circuit is set in such a way, the passband of the signal amplification filter circuit is cut to the frequency of 24Hz to 3332Hz, the whole passband amplification gain is 34.8dB, and the whole passband gain is smooth.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a more detailed description of the invention, and the specific embodiments thereof are not to be considered as limiting. Various changes in form and detail, including simple deductions or substitutions, may be made by those skilled in the art without departing from the spirit and scope of the invention.

Claims (32)

1. A wireless stethoscope, comprising:

a sound source contact part for being attached to a body to be auscultated;

the sound source transmission part is provided with a cavity transmission channel, the cavity transmission channel is provided with a first end and a second end along the extension direction of the cavity transmission channel, and the first end is connected with the sound source contact part;

a sound source collecting part connected with the second end;

a sound source processing unit connected to the sound source collecting unit;

and a sound source receiving unit wirelessly connected to the sound source processing unit.

2. The wireless stethoscope of claim 1 wherein said cavity transmission channel has a length between 35cm and 50 cm.

3. The wireless stethoscope of claim 1 wherein said cavity transmission channel is a soft cavity transmission channel.

4. The wireless stethoscope according to claim 1, wherein said sound source collecting part is capable of collecting sound in a frequency band of 20Hz to 50 Hz.

5. The wireless stethoscope of claim 1, wherein said sound source contact portion comprises: the operation portion and the contact site that are connected, sound source transmission portion with the operation portion is connected, the operation portion is used for supplying the user operation sound source contact site, the contact site is used for laminating in by the auscultation body, the top surface of operation portion extremely the distance of the bottom surface of contact site is between 20mm to 30 mm.

6. The wireless stethoscope of claim 5, wherein the distance from the top surface of said operating portion to the bottom surface of said contact portion in a direction perpendicular to the contact surface of said contact portion is between 20mm and 30 mm.

7. The wireless stethoscope of claim 5, wherein said operating portion is made of metal.

8. The wireless stethoscope of claim 5, wherein said contact portion comprises a suspended membrane.

9. The wireless stethoscope according to claim 1, wherein said sound source processing portion is provided with a noise reducing MIC.

10. The wireless stethoscope of claim 1, further comprising a metal connecting tube, one end of said metal connecting tube being connected to said sound source contact portion and the other end of said metal connecting tube being connected to said first end.

11. The wireless stethoscope according to any one of claims 1 to 10, wherein said sound source contact portion is a stethoscope probe, said sound source transmission portion is a hose, said sound source collecting portion is a sound pick-up, said sound source processing portion comprises a control circuit board, said control circuit board is provided with a wireless communication module, said sound source receiving portion is a wireless earphone, and said wireless earphone is wirelessly connected to said wireless communication module.

12. The wireless stethoscope of claim 11 wherein said flexible tube is a latex or rubber flexible tube.

13. The wireless stethoscope of claim 11, wherein said wireless communication module is a bluetooth audio communication module and said wireless headset is a bluetooth headset.

14. The wireless stethoscope of claim 11, wherein said microphone is one of a resistive, capacitive, electromagnetic or piezoelectric based microphone.

15. The wireless stethoscope of claim 14, wherein said sound pick-up is a capacitive electret microphone.

16. The wireless stethoscope of claim 15, wherein said condenser electret microphone is a unidirectional condenser electret microphone.

17. The wireless stethoscope according to claim 11, wherein said control circuit board further comprises a microprocessor, a memory module, a signal amplification filter circuit, a battery, a wireless connection status indication LED, a power-on status indication LED, a button, a charging or external power interface, said microprocessor is electrically connected to said memory module, said signal amplification filter circuit, said battery, said wireless connection status indication LED, said power-on status indication LED, said button, said charging or external power interface, said microphone is electrically connected to said signal amplification filter circuit, and said microprocessor of said wireless communication module is integrated into said microprocessor.

18. The wireless stethoscope according to claim 11, wherein said control circuit board further comprises a microprocessor, a memory module, a signal amplification and filtering circuit, a battery, a wireless connection status indication LED, a power-on status indication LED, a button, a charging or external power interface, said microprocessor is electrically connected to said memory module, said signal amplification and filtering circuit, said battery, said wireless connection status indication LED, said power-on status indication LED, said button, said charging or external power interface, said wireless communication module, and said sound pick-up is electrically connected to said signal amplification and filtering circuit.

19. The wireless stethoscope of claim 17 or 18, wherein said control circuit board further comprises an audio output port, said audio output port being connected to said microprocessor and/or said signal amplification filter circuit.

20. The wireless stethoscope according to claim 17 or 18, wherein said microprocessor is integrated with a microprocessor for charge management, digital noise reduction, wireless connection status indication LED and power-on status indication LED, signal acquisition and key management.

21. The stethoscope according to claim 11, wherein said sound source receiving portions are at least two, each of said sound source receiving portions being capable of being wirelessly connected to said sound source processing portion, respectively, each of said sound source receiving portions being adapted to be worn by a user.

22. The stethoscope according to claim 21, wherein said sound source processing part comprises wireless audio transmitters, each of said sound source receiving parts being capable of wirelessly connecting with said wireless audio transmitter.

23. The stethoscope according to claim 22 wherein each of said sound source receiving portions is a wireless earphone, each of said wireless earphones being capable of wirelessly connecting to said wireless audio transmitter.

24. The stethoscope according to claim 22 further comprising at least one wireless audio receiver, said wireless audio receiver being wirelessly connected to said wireless audio transmitter, each of said sound source receiving portions being a wired headset, each of said wired headsets being capable of wired connection to said wireless audio receiver.

25. The stethoscope of claim 22 further comprising at least one wireless audio receiver wirelessly connected to said wireless audio transmitter, one of said at least two sound source receivers being wired headphones and the other being wireless headphones, said wireless headphones being wirelessly connectable to said wireless audio transmitter, said wired headphones being wiredly connectable to said wireless audio receiver.

26. The stethoscope according to any one of claims 22-25 wherein said wireless audio transmitter incorporates a high-pass CRS8670 bluetooth chip or a high-pass CRS8675 bluetooth chip.

27. The stethoscope according to claim 1 wherein said sound source processing section comprises a signal amplification filter circuit including a pre-amplification circuit and a band-pass filter circuit, said signal amplification filter circuit having a passband cut-off frequency of 24Hz to 3332Hz and an overall passband amplification gain of 34.8 dB.

28. The stethoscope of claim 27 wherein said preamplifier circuit includes band pass filters, said band pass filter circuit including at least one band pass filter, each of said band pass filters being identical in composition.

29. The stethoscope of claim 28 wherein said preamplifier has a passband cut-off frequency of 12Hz to 9500Hz and a passband amplification gain of 24 dB; the band-pass filter circuit comprises three band-pass filters, the cut-off frequency of the pass band of each band-pass filter is 10Hz to 7000Hz, and the amplification gain of the pass band is 3.6 dB.

30. The stethoscope according to claim 11 further comprising a sound-proof shield disposed around said sound source contact portion and adapted to be fitted to said body to be auscultated.

31. The stethoscope according to claim 30 further comprising an auscultation handle extending in a first direction perpendicular to the direction in which said sound source contact portion is attached to said contact surface of said body to be auscultated, said auscultation handle extending into said sound-proof housing at one end and being positioned outside said sound-proof housing at the other end for user manipulation of said sound source contact portion.

32. The stethoscope according to claim 31 wherein said auscultation handle is a hollow tubular body, said hollow tubular body comprising a first portion, a second portion and a third portion connected in said first direction, said first portion being connected to said sound pick-up cavity of said sound source contacting portion, said second portion being connected to said sound-proof housing, said third portion being connected to said sound source transmitting portion.

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