Pressure type nasal airflow snore sensor

Abstract

The utility model belongs to the technical field of medical monitoring, and particularly relates to a pressure type nasal airflow snore sensor which comprises an outer shell and an airflow conduction connecting piece, a piezoelectric buzzer is arranged in the outer shell, a plurality of wires for transmitting signals are arranged on the piezoelectric buzzer, a sealing sleeve is sleeved outside the piezoelectric buzzer, a wire hole is formed in the sealing sleeve, and the airflow conduction connecting piece is connected with the sealing sleeve. A wire on the piezoelectric buzzer penetrates through the wire hole and the wire clamping groove to be connected with an external circuit board. The airflow conduction connecting piece comprises a nasal oxygen uptake hose connecting port and a sealing sleeve connecting air tap, the nasal oxygen uptake hose connecting port is communicated with the interior of the sealing sleeve connecting air tap, the nasal oxygen uptake hose connecting port is connected with a nasal oxygen uptake hose, and the sealing sleeve connecting air tap is used for guiding airflow in the nasal oxygen uptake hose into the surface of the piezoelectric buzzer. According to the sleep monitoring device, the comfort level of a wearer in the sleep monitoring process can be improved, medical staff can maintain the sleep monitoring device conveniently, the service life of the sensor can be prolonged, and manufacturing and using cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical monitoring, and particularly relates to a pressure type nasal airflow snoring sensor, and more particularly to a sensor for human body respiratory movement waveform and snoring movement waveform in sleep monitoring. Background Technique

[0002] Monitoring instruments for human body oral and nasal airflow respiratory movement can help nursing staff evaluate the stability of patients during and after surgery, and can also help with sleep-related treatments. Currently, there are mainly four types of sensitive materials for sensors used in oral and nasal airflow respiratory movement monitoring: the first type uses thermosensitive elements to monitor the changes in oral and nasal airflow, the second type uses humidity-sensitive elements to monitor the changes in oral and nasal airflow, the third type uses piezoresistive elements to monitor the changes in oral and nasal airflow, and the fourth type uses piezoelectric elements to monitor the changes in oral and nasal airflow. Thermosensitive elements mainly include thermistors and thermocouples. Sensors based on thermosensitive elements are also called thermosensitive oral and nasal airflow respiratory movement sensors. The principle is to convert the temperature change of the breathing gas of the monitored person through the mouth and nose into a change in resistance value or voltage value, so as to reflect the respiratory movement waveform.

[0003] Thermosensitive oral and nasal airflow respiratory movement sensors are usually composed of 3 or 4 thermosensitive elements combined. The thermosensitive elements are exposed. Under the action of moist oral and nasal airflow for a long time, the thermosensitive elements are easily corroded and damaged, resulting in a short service life. And after each use, medical staff need to use an alcohol lamp disinfectant to clean and disinfect the thermosensitive elements of the sensor, which further accelerates the aging speed of the thermosensitive components.

[0004] Furthermore, most snoring sensors used in sleep monitoring systems are microphone type and piezoelectric crystal type. This type of sensor transmits the vibration caused by the snoring of the tested person to the sensor and converts it into a change in voltage value to reflect the snoring movement waveform. It is used separately from the sensor for human body oral and nasal airflow respiratory movement. And when using the snoring sensor, it needs to be pasted beside the trachea of the monitored person's neck with a special medical tape. During the use process, there is not only a great risk of falling off, but also the monitored person will feel uncomfortable. Content of the Utility Model

[0005] To improve the deficiencies of the existing technology, the utility model provides a pressure type nasal airflow snoring sensor, which can improve at least one of the following problems: it can not only improve the comfort of the wearer during sleep monitoring, facilitate the maintenance of medical staff, but also improve the service life of the sensor and reduce the manufacturing and use costs.

[0006] A pressure - type nasal airflow snore sensor. The sensor includes an outer housing and an air - conduction connecting piece. A piezoelectric buzzer is arranged inside the outer housing. There are several signal - transmitting wires on the piezoelectric buzzer. A sealing sleeve is sleeved outside the piezoelectric buzzer, and a wire hole is opened on the sealing sleeve. The wires on the piezoelectric buzzer pass through the wire hole and the wire slot to be connected with an external circuit board.

[0007] The air - conduction connecting piece includes a nasal oxygen inhalation hose connection port and a sealing - sleeve connection nozzle. The inside of the nasal oxygen inhalation hose connection port and the sealing - sleeve connection nozzle is connected. The nasal oxygen inhalation hose connection port is connected to a nasal oxygen inhalation hose, and the sealing - sleeve connection nozzle is used to introduce the airflow in the nasal oxygen inhalation hose to the surface of the piezoelectric buzzer.

[0008] Preferably, the outer housing includes an upper housing and a lower housing which are oppositely arranged. An air - nozzle slot is arranged on the outer side of the upper housing, and the air - nozzle slot is used to fix the air - conduction connecting piece.

[0009] Preferably, several wire slots are also arranged on the outer side of the upper housing, and the wire slots are used for the wires on the piezoelectric buzzer to enter and exit.

[0010] Preferably, an airway groove is also arranged on the sealing sleeve, and the airway groove is used to connect the sealing - sleeve connection nozzle.

[0011] Preferably, several clamping protrusions are also arranged on the sealing sleeve, and the clamping protrusions are used to be clamped into the connection grooves on the edges of the upper housing and the lower housing.

[0012] Preferably, an external circuit board is arranged on the outside of the outer housing. The wires of the piezoelectric buzzer are electrically connected to the circuit board. Among them, the wires include a positive - pole wire and a negative - pole wire. The positive - pole wire is connected to the positive - pole access port P1 of the circuit board, and the negative - pole wire is connected to the negative - pole access port P2 of the circuit board.

[0013] Preferably, the circuit board includes a breath input end and a snore output end. A first capacitor C1, a first resistor R1, and a second capacitor C2 are arranged in parallel in sequence between the positive - pole access port P1 and the snore output end. A second resistor R2 is arranged between the negative - pole access port P2 and the snore output end, and the second resistor R2 is connected to the first resistor.

[0014] Beneficial effects

[0015] When the present utility model is in use, the gas passes through the nasal oxygen inhalation hose, enters the sealing sleeve through the air - conduction connecting piece. Since the airway groove is arranged on the sealing sleeve, the gas enters the front - side small holes of the piezoelectric buzzer through the airway groove and applies pressure to the internal piezoelectric ceramic sheet. When the user exhales and inhales, the air pressure in the tube changes, resulting in a change in the pressure received by the piezoelectric ceramic sheet, generating a waveform signal reflecting the breathing rhythm. According to the differences in frequency and amplitude between the breathing and snoring signals, the circuit board can separate the breathing waveform signal and the snoring signal. Brief Description of the Drawings

[0016] Figure 1 Schematic diagram of the upper housing of the outer shell of the present utility model;

[0017] Figure 2 Schematic diagram of the lower housing of the outer shell of the present utility model;

[0018] Figure 3 Schematic diagram of the sealing sleeve;

[0019] Figure 4 Schematic diagram of the structure of the air flow interface part cooperating with the sealing sleeve;

[0020] Figure 5 Schematic diagram of the circuit;

[0021] Figure 6 Actual test respiratory output waveform diagram of the device using the present utility model;

[0022] Figure 7 Actual test snoring output waveform diagram of the device using the present utility model.

[0023] Wherein, 1 - outer housing, 2 - upper housing, 4 - nozzle slot, 5 - wire slot, 6 - air conduction connector, 9 - wire hole, 11 - nasal oxygen inhalation hose connection port, 12 - sealing sleeve connection nozzle, 14 - airway groove. Detailed Description of the Preferred Embodiments

[0024] The following will further elaborate on the structure of the present utility model in conjunction with specific embodiments. It should be understood that the following embodiments are only for illustrative and explanatory purposes of the present utility model, and should not be construed as limiting the protection scope of the present utility model. All technologies implemented based on the above content of the present utility model are covered within the scope of protection intended by the present utility model.

[0025] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

[0026] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] Embodiment 1

[0028] See Figure 1 and Figure 2 As shown in and, a pressure type nasal airflow snore sensor includes a housing 1 and an air conduction connector 6. The housing 1 includes an upper housing 2 and a lower housing arranged oppositely. One side of the upper housing 1 is provided with an air nozzle slot 4 for fixing the air conduction connector 6; the other side is provided with a plurality of wire slots 5, such as a first wire slot and a second wire slot. The first wire slot is for the entry and exit of the respiration output wire, and the second wire slot is for the entry and exit of the snore output wire. The upper housing 2 and the lower housing are detachably connected, such as by snap connection. In this embodiment, connection grooves are provided at the edges of the upper housing 2 and the lower housing.

[0029] A piezoelectric buzzer is arranged inside the housing 1. A plurality of wires for transmitting signals are arranged on the piezoelectric buzzer. A sealing sleeve is sleeved outside the piezoelectric buzzer. A wire hole 9 is opened on the sealing sleeve. The wires on the piezoelectric buzzer pass through the wire hole 9 and the wire slots 5 and are connected to an external circuit board.

[0030] The air conduction connector 6 includes a nasal oxygen inhalation hose connection port 11 and a sealing sleeve connection air nozzle 12. The inside of the nasal oxygen inhalation hose connection port 11 and the sealing sleeve connection air nozzle 12 is connected. The nasal oxygen inhalation hose connection port 11 is connected to a nasal oxygen inhalation hose. The sealing sleeve connection air nozzle 12 is used to introduce the airflow in the nasal oxygen inhalation hose to the surface of the piezoelectric buzzer.

[0031] An airway groove 14 is further provided on the sealing sleeve. The airway groove 14 is used to connect the sealing sleeve connection air nozzle 12 to completely wrap the air nozzle part of the sealing sleeve connection air nozzle 12 in the sealing sleeve, and a gas tight structure is formed between the piezoelectric buzzer and the surface of the sealing sleeve opposite to the sealing sleeve connection air nozzle 12. A plurality of snap protrusions are further provided on the sealing sleeve for snapping into the connection grooves at the edges of the upper housing 2 and the lower housing.

[0032] A circuit board 16 is arranged outside the housing 1. The wires of the piezoelectric buzzer are electrically connected to the circuit board 16. Among them, the wires include a positive wire and a negative wire. The positive wire is connected to the positive connection port P1 of the circuit board, and the negative wire is connected to the negative connection port P2 of the circuit board.

[0033] The circuit board 16 includes a breath input end and a snore output end. Between the positive power supply input port P1 and the snore output end, a first capacitor C1, a first resistor R1, and a second capacitor C2 are arranged in parallel in sequence. Between the negative power supply input port P2 and the snore output end, a second resistor R2 is arranged, and the second resistor R2 is connected to the first resistor.

[0034] The sealing sleeve is made of soft silicone or silicone, which is not only waterproof and corrosion-resistant, but also has a certain elasticity.

[0035] The piezoelectric buzzer is a conventional electro-acoustic device with positive and negative polarities, having a simple structure and low price. Usually, a piezoelectric ceramic sheet is wrapped in a plastic shell, with a slightly larger round hole in the center of the front and a slightly smaller round hole in the center of the bottom. The piezoelectric buzzer can emit corresponding frequency sounds by being excited by different frequencies, and can also convert the pressure change into a voltage change. The piezoelectric buzzer used in the present utility model is circular, with a diameter of 22 mm and a thickness of 4.5 mm. By changing the size of the sealing sleeve 7, a good airtightness can be formed with the piezoelectric buzzer, and the same effect can also be achieved with piezoelectric buzzers of other sizes.

[0036] The positive wire of the piezoelectric buzzer is welded to the circuit board P1, and the negative wire is welded to the circuit board P2. Before welding, the wires first pass through the wire holes 9 of the sealing sleeve and are installed with the front facing the bottom of the sealing sleeve 7. The protrusions outside the sealing sleeve can maintain a certain extrusion with the housing 1, which can prevent the piezoelectric buzzer from shaking in the housing.

[0037] The gas passes through the nasal oxygen inhalation hose and enters the sealing sleeve through the air flow conduction connector. Since the sealing sleeve is provided with an airway groove 14, the gas enters the front small hole of the piezoelectric buzzer through the airway groove 14 and applies pressure to the internal piezoelectric ceramic sheet. When the user exhales and inhales, the air pressure in the tube changes, which causes the pressure on the piezoelectric ceramic sheet to change, generating a waveform signal reflecting the breathing rhythm. According to the differences in frequency and amplitude between the breathing and snoring signals, the circuit board can separate the breathing waveform signal and the snoring signal.

[0038] To achieve the functions of the present utility model, it is necessary to ensure the tightness of the connection of each component, so that a certain air pressure is formed when the breathing gas is transmitted to the piezoelectric sheet through the nasal oxygen hose. Otherwise, a good observable signal cannot be obtained. Refer to Figure 6 and 7 As shown, the waveform diagram obtained by testing with the present utility model is shown, indicating that the sensor of the present utility model has high sensitivity.

[0039] The specific implementation manners of the present utility model have been exemplarily described through the embodiments above. However, the protection scope of the present utility model is not limited to the above exemplary implementation manners. Any modifications, equivalent replacements, improvements, etc. made by those skilled in the art within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. A pressure-type nasal airflow snoring sensor, characterized in that: The sensor comprises an outer shell and an airflow conducting connector, a piezoelectric buzzer is arranged in the outer shell, a plurality of wires for transmitting signals are arranged on the piezoelectric buzzer, a sealing sleeve is connected to the outer shell of the piezoelectric buzzer, a wire hole is opened on the sealing sleeve, and the wires on the piezoelectric buzzer pass through the wire hole and the wire slot to be connected to the external circuit board; The airflow conduction connector includes a nasal oxygen hose connection port and a sealing sleeve connecting air nozzle, the interiors of the nasal oxygen hose connection port and the sealing sleeve connecting air nozzle are connected, the nasal oxygen hose connection port is connected to the nasal oxygen hose, and the sealing sleeve connecting air nozzle is used to guide the airflow in the nasal oxygen hose into the surface of the piezoelectric buzzer.

2. The pressure-type nasal airflow snoring sensor according to claim 1, characterized in that: The outer shell comprises an upper shell and a lower shell which are arranged opposite to each other. An air nozzle slot is arranged on the outer side of the upper shell, and the air nozzle slot is used to fix the airflow conduction connecting piece.

3. The pressure-type nasal airflow snoring sensor according to claim 2, characterized in that: The outer side of the upper shell is also provided with a plurality of wire slots, and the wire slots are used for the wires on the piezoelectric buzzer to enter and exit.

4. The pressure-type nasal airflow snoring sensor according to claim 1, characterized in that: The sealing sleeve is also provided with an airway groove, and the airway groove is used to connect the sealing sleeve to the air nozzle.

5. The pressure-type nasal airflow snoring sensor according to any one of claims 1 to 4, characterized in that: The sealing sleeve is also provided with a plurality of clamping protrusions, and the clamping protrusions are used to be clamped into the connecting grooves at the edges of the upper shell and the lower shell.

6. The pressure-type nasal airflow snoring sensor according to any one of claims 1 to 4, characterized in that: A circuit board is arranged outside the outer shell, and the wires of the piezoelectric buzzer are electrically connected to the circuit board, wherein the wires include a positive wire and a negative wire, the positive wire is connected to the positive electrode access port P1 of the circuit board, and the negative wire is connected to the negative electrode access port P2 of the circuit board.

7. The pressure-type nasal airflow snoring sensor according to claim 6, characterized in that: The circuit board includes a breathing input terminal and a snoring output terminal. A first capacitor C1, a first resistor R1 and a second capacitor C2 are arranged in parallel in sequence between the positive electrode inlet P1 and the snoring output terminal. A second resistor R2 is arranged between the negative electrode inlet P2 and the snoring output terminal, and the second resistor R2 is connected to the first resistor.

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