CN110179493A - A kind of hands-free auscultation head having sound insulation and decrease of noise functions - Google Patents

Abstract

The invention discloses a hands-free auscultation head with the function of sound insulation and noise reduction, which comprises a sound insulation body, a sound pickup head and a vibrating membrane. In the installation cavity of the sound insulation body, there is a funnel-shaped sound pickup cavity at the inner bottom of the sound pickup head, and a vibrating film is set at the bottom of the sound pickup cavity. The head and the vibrating membrane are wrapped so that the vibrating membrane is located in the middle of the bottom of the sound insulator, the bottom of the vibrating membrane is flush with the bottom of the sound insulator, and there are double-sided stickers on the bottom of the vibrating membrane and the sound insulator. When it is applied, it can effectively reduce the interference of external noise on audio collection, and at the same time, it can realize wireless unattended monitoring, which is more convenient to use.

Description

A hands-free stethoscope head with sound insulation and noise reduction function

technical field

The invention relates to the technical field of stethoscopes, in particular to a hands-free stethoscope head with the function of sound insulation and noise reduction.

Background technique

At present, auscultation heads of various structures can better solve the problem of picking up sound, but in the actual clinical auscultation process, there are often different levels of environmental background noise. Filter "environmental background noise; but when using an electronic stethoscope, the frequency range of external environmental noise that can be distinguished by the human ear is generally 20hz-20khz, covering the effective frequency range of bowel sounds 100hz-1000hz. When the bowel sound signal is weak and the environmental noise signal is too strong, the bowel sound signal has been completely "submerged" by the environmental noise signal, and such weak bowel sound signal cannot be extracted. In addition, the use of conventional filtering methods, while filtering out noise signals, will also lose useful signals of bowel sounds to a certain extent, distorting the filtered bowel sound signals and reducing the accuracy of diagnosis. Compared with the traditional auscultation head, the current medical electronic auscultation head uses a microphone for sound-electric conversion, and outputs it through the earphone interface for the auscultation personnel to identify. This audio collection technology has higher audio frequency than the physical amplification of the traditional auscultation head. The amplification function greatly improves the efficiency and accuracy, and there are many such devices with wireless transmission technology and audio-visual technology. However, the current doctor's application angle of electronic stethoscope is the same as that of traditional stethoscope. It is applied in short-term manual diagnosis and During the synchronizing process of auxiliary equipment, as the diagnosis (examination) is completed, the equipment is also used synchronously. Therefore, the exclusive diagnostic installation technology is not considered in the operation process. The doctor usually places the auscultation head on the relevant part of the patient to be examined by hand. After the auscultation is completed Take it down, stay under the feature of short-time synchronization to assist human inspection.

Contents of the invention

The present invention aims at the deficiencies in the prior art, and provides a hands-free auscultation head with sound insulation and noise reduction functions. When it is applied, the sound insulation body, the vibrating membrane and the pickup head are integrally connected, and the sound insulation body is wrapped and used as the whole sound pickup The outer wall structure of the head prevents external noise from passing into the internal sound pickup cavity of the pickup head, effectively reducing the interference of external noise on audio collection, and at the same time, it is not necessary for the doctor to continuously press the auscultation site with hands, which is more convenient to use.

The present invention is realized through the following technical solutions:

A hands-free auscultation head with sound insulation and noise reduction functions, comprising a sound insulation body, a sound pickup head and a vibrating membrane, the sound insulation body is a columnar body, the inner bottom of which is provided with a mounting cavity, and the sound pickup head is located on the installation surface of the sound insulation body. In the cavity, there is a funnel-shaped sound pickup cavity at the inner bottom of the pickup head, and a vibrating membrane is set at the bottom of the pickup cavity. Wrapping, so that the vibrating membrane is located in the middle of the bottom surface of the sound insulator, the bottom surface of the vibrating membrane is flush with the bottom surface of the sound insulator, and double-sided application is pasted on the bottom of the vibrating membrane and the sound insulator.

Preferably, a circuit board and a battery are also provided in the soundproof body, and a power module, a signal processor and a wireless communication module are integrated on the circuit board, and the signal processor is electrically connected to the pickup head, the power module and the wireless communication module respectively, The power supply module is electrically connected to the battery, and the power supply module is used to convert the battery power supply into voltage to provide power for the pick-up head, signal processor and wireless communication module, and the pick-up head converts the sound signal into an electrical signal and transmits it to the signal processor , the signal processor amplifies the signal and transmits it to the wireless communication module, and the radio frequency signal is transmitted by the wireless communication module.

Preferably, the battery inputs 5V voltage to the power module, and the power module is equipped with LM4132AMF power chip and TPS727 power chip, which are used to convert 5V voltage into 3.3V and 3.0V voltage output power supply respectively, and the signal processor is equipped with OPA333AIDCK type analog signal filter , amplification chip and STM32L433 single-chip microcomputer chip for sampling, calculation and control. The wireless communication module is equipped with nRF24L01 radio frequency transceiver chip and MIFA antenna. Single ended and connected to MIFA antenna.

Preferably, a detachable cover is provided on the top of the sound insulator, and the detachable cover covers the circuit board and the battery in the sound insulator.

Preferably, a charging circuit is integrated on the circuit board, an external charging interface is provided on the sound insulation body, the input end of the charging circuit is connected to the charging interface, and the output end is connected to a battery, which is a rechargeable lithium battery.

Preferably, the sound insulator is a silicone sound insulator, and a fixed rubber ring is provided on the outside of the joint between the bottom of the pickup head and the vibrating membrane.

Preferably, the double-sided applicator is evenly pasted on the bottom surface of the sound insulator and the vibrating membrane.

The present invention has following advantage and beneficial effect:

1. The present invention is a hands-free auscultation head with sound insulation and noise reduction functions. The sound insulation body, vibrating membrane and pickup head are integrated and connected, and the sound insulation body is wrapped and used as the outer wall structure of the entire pickup head to prevent external noise from entering The pickup cavity inside the pickup head can effectively reduce the interference of external noise on audio collection.

2. The present invention is a hands-free auscultation head with sound insulation and noise reduction function, which can realize wireless unattended monitoring and is more convenient to use without the need for the doctor to continuously press the auscultation site with his hands.

3. A hands-free auscultation head with sound insulation and noise reduction functions of the present invention has a compact structure, light weight, skin-friendly material, and will not cause discomfort to patients during use.

Description of drawings

The drawings described here are used to provide a further understanding of the embodiments of the present invention, constitute a part of the application, and do not limit the embodiments of the present invention. In the attached picture:

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the film schematic diagram in embodiment 2;

Fig. 3 is the structural representation of the soundproof body in embodiment 3;

FIG. 4 is a schematic diagram of the gear ring in Embodiment 4. FIG.

Marks and corresponding parts names in the attached drawings:

1-Sound insulator, 2-Pickup head, 3-Pickup cavity, 4-Diaphragm, 5-Fixed rubber ring, 6-Double-sided application, 7-Circuit board, 8-Battery, 9-Removable cover, 10-film, 11-gear ring.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the examples and accompanying drawings. As a limitation of the present invention.

Example 1

As shown in Figure 1, a hands-free auscultation head with sound insulation and noise reduction functions includes a sound insulation body 1, a sound pickup head 2 and a vibrating membrane 4, and the sound insulation body 1 is a columnar body, and its inner bottom is provided with a mounting cavity , the pickup head 2 is located in the installation cavity of the sound insulation body 1, and the inner bottom of the pickup head 2 is provided with a funnel-shaped pickup cavity 3, and the bottom of the pickup cavity 3 is provided with a vibrating membrane 4, and the pickup head 2 and the vibrating membrane 4 The sound pickup cavity 3 is closed by the seamless joint, and the sound insulation body 1 wraps the sound pickup head 2 and the vibration film 4, so that the vibration film 4 is located in the middle of the bottom surface of the sound insulation body 1, and the bottom surface of the vibration film 4 is flush with the bottom surface of the sound insulation body 1 , a double-sided applicator 6 is pasted on the bottom surface of the vibrating membrane 4 and the sound insulator 1 .

During specific implementation, the sound insulator 1 is attached to the patient's auscultation site through the double-sided applicator 6, and the bowel sound signal is picked up by the pickup head 2 after passing through the vibrating membrane 4 and the pickup cavity 3 and converted into an electrical signal for subsequent processing , in the process of picking up the bowel sound signal, the sound insulation body 1 wraps the pickup head 2 and the sound pickup cavity 3 and isolates it, leaving only the bowel sound signal transmission channel at the end of the vibrating membrane 4, so as to block the transmission of external noise into the sound pickup The sound pickup cavity 3 at the bottom of the head 2 can effectively reduce the interference of external noise on audio collection. At the same time, after the sound insulation body 1 is closely attached to the patient's auscultation site through the double-sided application 6, the doctor can withdraw his hands without continuous pressing. Auscultation, very convenient to use.

A circuit board 7 and a battery 8 are also arranged in the soundproof body 1, and a power module, a signal processor and a wireless communication module are integrated on the circuit board 7, and the signal processor is electrically connected to the pickup head 2, the power module and the wireless communication module respectively , the power module is electrically connected with the battery 8, and the power module is used to convert the power supply of the battery 8 to provide power for the pickup head 2, the signal processor and the wireless communication module, and the pickup head 2 converts the sound signal into an electrical signal The signal is transmitted to the signal processor, and the signal processor amplifies the signal and transmits it to the wireless communication module, and the radio frequency signal is transmitted by the wireless communication module. The battery 8 inputs 5V voltage to the power module. The power module is equipped with LM4132AMF power chip and TPS727 power chip, which are used to convert 5V voltage into 3.3V and 3.0V voltage output power supply respectively. The signal processor is equipped with OPA333AIDCK analog signal filter and amplification Chip and STM32L433 single-chip microcomputer chip for sampling, calculation and control. The wireless communication module is equipped with nRF24L01 RF transceiver chip and MIFA antenna. The RF transceiver chip is connected to the signal processor through the SPI interface. And connect with MIFA antenna. When it is applied, the auscultation head can be used separately from the back-end auscultation equipment. As long as the battery 8 has enough power, the sound insulation body 1 can be continuously attached to the patient for long-term wireless hands-free unattended monitoring. The pickup head 2 transmits the converted electrical signal to the signal processor, and performs signal amplification and noise reduction processing through the signal processor, and then the signal processor wirelessly sends the processed signal to the back-end monitoring device through the wireless communication module, and monitors The device automatically reads the signal to play and record. Through this process, automatic wireless hands-free unattended monitoring is realized. The OPA333AIDCK operational amplifier chip and nRF24L01 radio frequency transceiver chip can effectively reduce power consumption and make the battery 8 power Can be used for a longer period of time.

The top of the sound insulator 1 is provided with a detachable cover 9, and the detachable cover 9 covers the circuit board 7 and the battery 8 in the sound insulator 1. When it is used, the detachable cover 9 is convenient to be removed to clean the circuit board 7 and the battery. 8 for replacement and maintenance.

A charging circuit is integrated on the circuit board 7, and an external charging interface is provided on the sound insulation body 1. The input terminal of the charging circuit is connected to the charging interface, and the output terminal is connected to the battery 8. The battery 8 is a rechargeable lithium battery. The interface and the charging circuit charge the battery 8 to solve the trouble of replacing the battery and realize the purpose of long-term use. The rechargeable lithium battery stores a large amount of electricity and can be used for 24 hours in a quiet state when fully charged.

The sound insulator 1 is a silicone sound insulator, and a fixed rubber ring 5 is provided on the outside of the junction between the bottom of the pickup head 2 and the vibrating membrane 4. The silicone sound insulator is relatively close to the skin of the human body and will not make the patient feel uncomfortable. 5 forms fixed protection to pickup head 2 and vibrating membrane 4.

The double-sided applicator 6 is evenly pasted on the bottom surface of the sound-insulating body 1 and the vibrating membrane 4, so that the double-sided applicator 6 is more tightly and stably attached to the patient's body surface.

Example 2

As shown in Figure 2, when using the auscultation head, a larger film 10 can be pasted on the patient's auscultation site, and then the double-sided applicator 6 can be pasted on the film 10, so that the auscultation head can be attached The tightness of the double-sided application 6 and the film 10 is greater than that of directly sticking the double-sided application 6 on the patient's body surface, and the force-bearing area of the film 10 is large, and it is not easy to fall after application. It is more convenient, and both the double-sided applicator 6 and the film 10 are replaced after use for the next use.

Example 3

As shown in Figure 3, the sound insulator 1 can be made into a shape with a large top and a small bottom, and the middle part can be provided with a convex edge for easy grasping. Since the double-sided application 6 is relatively viscous, it is not easy to remove after bonding. The design is convenient for the sound insulation body 1 to be pulled out from the auscultation site.

Example 4

As shown in FIG. 4 , a toothed ring 11 is provided outside the sound insulator 1 to increase friction so that the sound insulator 1 can be pulled out from the auscultation site.

Example 5

The most suitable auscultation head specification parameters obtained after many times of practice are:

The cross-sectional diameter of the sound insulation body 1 is 50mm±5mm;

Sound insulation body 1 height 20mm±2mm;

Diameter of diaphragm 4 is 30mm±2mm;

The height of the pickup chamber 3 is 5mm±1mm.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the scope of the present invention. Protection scope, within the spirit and principles of the present invention, any modification, equivalent replacement, improvement, etc., shall be included in the protection scope of the present invention.

Claims (7)

1. a kind of hands-free auscultation head for having sound insulation and decrease of noise functions, which is characterized in that including sound insulation body (1), pick-up head (2) and Vibrating membrane (4), the sound insulation body (1) are column, and interior bottom is equipped with installation cavity, and pick-up head (2) is located at the peace of sound insulation body (1) In behaveing affectedly, it is equipped with funnel-form pickup chamber (3) in the interior bottom of pick-up head (2), pickup chamber (3) bottom sets vibrating membrane (4), pick-up head (2) pickup chamber (3) are closed with vibrating membrane (4) seamless combination, sound insulation body (1) wraps up pick-up head (2) and vibrating membrane (4), makes Vibrating membrane (4) is located at the bottom surface middle position of sound insulation body (1), and the bottom surface of vibrating membrane (4) is concordant with the bottom surface of sound insulation body (1), Two-sided application (6) are posted in the bottom surface of vibrating membrane (4) and sound insulation body (1).

2. a kind of hands-free auscultation head for having sound insulation and decrease of noise functions according to claim 1, which is characterized in that it is described every Circuit board (7) and battery (8) are additionally provided in sound body (1), power module, signal processor and wirelessly are integrated on circuit board (7) Communication module, signal processor respectively with pick-up head (2), power module and wireless communication module be electrically connected, power module with Battery (8) is electrically connected, and power module is used for after the power supply progress voltage conversion by battery (8) as pick-up head (2), signal processing Device and wireless communication module provide power supply, and voice signal is converted to electric signal and reaches signal processor by pick-up head (2), at signal Reason device reaches wireless communication module after signal is amplified processing, is spread out of by wireless communication module radio frequency signal.

3. a kind of hands-free auscultation head for having sound insulation and decrease of noise functions according to claim 2, which is characterized in that battery (8) 5V voltage is inputted to power module, power module is equipped with LM4132AMF power supply chip and TPS727 power supply chip, uses respectively In 5V voltage is converted to the power supply of 3.3V and 3.0V voltage output, signal processor is filtered equipped with OPA333AIDCK type analog signal Wave, amplification chip and for sampling, the STM32L433 type singlechip chip of operation and control, wireless communication module is equipped with NRF24L01 type rf chip and MIFA antenna, rf chip are connect with signal processor by SPI interface, are penetrated Turn single-ended after the difference output of frequency end and is connect with MIFA antenna.

4. a kind of hands-free auscultation head for having sound insulation and decrease of noise functions according to claim 3, which is characterized in that sound insulation body (1) detachable cover (9) are arranged in top, and detachable cover (9) closes circuit board (7) and battery (8) lid in sound insulation body (1).

5. a kind of hands-free auscultation head for having sound insulation and decrease of noise functions according to claim 2, which is characterized in that the electricity Charging circuit is integrated on road plate (7), sound insulation body (1) is equipped with external charging interface, charging circuit input terminal and charging interface Docking, output end are connect with battery (8), and battery (8) is rechargeable lithium battery.

6. a kind of hands-free auscultation head for having sound insulation and decrease of noise functions according to claim 1, which is characterized in that it is described every Sound body (1) is silica gel sound insulation body, and pick-up head (2) bottom and the outside of vibrating membrane (4) bonding station are equipped with fixed rubber ring (5).

7. a kind of hands-free auscultation head for having sound insulation and decrease of noise functions according to claim 1, which is characterized in that described double It is smooth on sound insulation body (1) bottom surface and vibrating membrane (4) that face applies (6).