Blood pressure measuring device

Abstract

A blood pressure measurement device (1) which is worn on a wrist (300) by means of a strap (6) is provided with: a device body (3) which has a case (11), a pump (14) provided inside the case (11), a pressure sensor (17), a fluid circuit (24) connected to the pump (14) and the pressure sensor (17), and a sensor unit (31b1) provided on the rear surface (31b) of the case (11) facing the wrist (300); a first pressing cuff (52) connected to the fluid circuit (24) and fixed to one end in one direction of the back surface (31b) of the housing (11) so as to be separated from the sensor unit (31b1); and a second pressing cuff (62) which is connected to the fluid circuit (24), is fixed to the other end of the back surface (31b) of the housing (11) in the one direction so as to be separated from the sensor unit (31b1), and is fluidly connected to the first pressing cuff (52). The first pressing cuff (52) and the second pressing cuff (62) are wound around the wrist (300) by the strap (6), and when the blood pressure measurement device (1) is worn on the wrist (300) with the assumed maximum circumference, at least one of the first pressing cuff (52) and the second pressing cuff (62) faces at least one of the two arteries, and the first pressing cuff (52) and the second pressing cuff (62) overlap.

Description

Technical Field

[0001] The present invention relates to a blood pressure measuring device. Background Art

[0002] In recent years, blood pressure measurement devices have become increasingly popular as a means of confirming health status not only in medical facilities but also at home. These devices measure blood pressure by inflating and deflating a cuff wrapped around, for example, a person's wrist. A pressure sensor detects the pressure of the cuff, thereby detecting arterial wall vibrations.

[0003] Furthermore, as disclosed in International Publication No. 2012 / 018029 and Japanese Patent Application Laid-Open No. 2020-103628, wearable blood pressure monitors worn on the wrist are known as blood pressure measurement devices. To ensure a sufficient compression area on the wrist, such blood pressure measurement devices have a cuff mounted on the back of the device body. Consequently, these devices cannot accommodate various sensors such as ECG (electrocardiogram) sensors and PPG (photoplethysmography) sensors on the back of the device body.

[0004] Furthermore, as disclosed in Japanese Patent Application Laid-Open No. 62-292137, a blood pressure measurement device is also known in which an air chamber is provided on the back of the device body and a cuff connected to a belt on both sides of the device body is connected via the air chamber.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: International Publication No. 2012 / 018029

[0008] Patent Document 2: Japanese Patent Application Laid-Open No. 2020-103628

[0009] Patent Document 3: Japanese Patent Application Laid-Open No. 62-292137 Summary of the Invention

[0010] Problems to be solved by the invention

[0011] In the blood pressure measurement devices described in International Publication No. 2012 / 018029 and Japanese Patent Application Laid-Open No. 2020-103628, the cuff must be removed from the back of the device body in order to install various sensors thereon. However, if the cuff is not installed on the back of the device body, the compression area is reduced, thereby reducing the measurement accuracy of the blood pressure measurement device.

[0012] In the blood pressure measurement device described in Japanese Patent Application Laid-Open No. 62-292137, since the air chamber is provided on the back surface of the device body, it is difficult to arrange the sensor unit on the back surface of the device body.

[0013] Therefore, an object of the present invention is to provide a blood pressure measurement device that has good measurement accuracy even when a sensor unit is arranged on the back surface of the device body.

[0014] Solutions for solving problems

[0015] According to one embodiment, a blood pressure measurement device is provided that is worn on a wrist via a strap, the blood pressure measurement device comprising: a device body having a housing, a pump disposed within the housing, a pressure sensor, a fluid circuit connected to the pump and the pressure sensor, and a sensor portion disposed on a back surface of the housing facing the wrist; a first compression cuff connected to the fluid circuit and fixed to one end of the back surface of the housing in one direction so as to be separate from the sensor portion; and a second compression cuff connected to the fluid circuit and fixed to the other end of the back surface of the housing in the one direction so as to be separate from the sensor portion, and fluidically connected to the first compression cuff. The first compression cuff and the second compression cuff are wrapped around the wrist via the strap. When the blood pressure measurement device is worn on a wrist with an assumed maximum circumference, at least one of the first compression cuff and the second compression cuff is opposed to at least one of a radial artery and an ulnar artery passing through the wrist, and the first compression cuff and the second compression cuff overlap.

[0016] According to this solution, since the sensor unit, the first compression cuff, and the second compression cuff are provided on the back of the housing, information can be acquired by the sensor unit, and the wrist can be compressed by the inflated first and second compression cuffs. Furthermore, even if the first and second compression cuffs cannot compress the wrist within the housing due to the sensor unit being provided, the first and second compression cuffs can still overlap, allowing for appropriate compression of the wrist. Therefore, even with the sensor unit provided on the back of the device body, the blood pressure measurement device maintains excellent measurement accuracy.

[0017] The blood pressure measurement device according to the above-mentioned aspect includes a sensing cuff disposed on the wrist side of one of the first pressing cuff and the second pressing cuff and connected to the fluid circuit.

[0018] According to this aspect, the blood pressure measurement device can measure the blood pressure using the sensor disposed on the wrist side of one of the first pressing cuff and the second pressing cuff.

[0019] In the blood pressure measurement device according to the above aspect, the sensor unit includes at least one of a biological sensor and a charging terminal.

[0020] According to this embodiment, the blood pressure measurement device eliminates the need to locate the biosensor or charging terminal remotely from the device body by locating the biosensor or charging terminal on the back of the device body, thereby increasing flexibility in placement. Furthermore, the sensor portion is located within the rigid housing of the device body, allowing for contact with the wrist when the blood pressure measurement device is worn on the wrist, thereby enabling appropriate acquisition of biometric information via the biosensor. Furthermore, by locating the charging terminal within the sensor portion, the charging terminal is exposed when the blood pressure measurement device is removed from the wrist, facilitating charging using the charging terminal.

[0021] In the blood pressure measurement device according to the above-described aspect, the first pressing cuff and the second pressing cuff are fluidically connected via a fluid circuit provided in the device body.

[0022] According to this aspect, in the blood pressure measurement device, the first pressing cuff and the second pressing cuff are fluidically connected via the fluid circuit provided in the device body. Therefore, the arrangement of the first pressing cuff and the second pressing cuff on the back surface can be simplified.

[0023] In the blood pressure measurement device according to the above-mentioned aspect, the first pressing cuff and the second pressing cuff are fluidically connected to each other on the back surface avoiding the sensor portion.

[0024] According to this aspect, since the first and second pressing cuffs of the blood pressure measurement device are connected while avoiding the sensor unit, it is possible to prevent the first and second pressing cuffs from interfering with the sensor unit and hindering the function of the sensor unit.

[0025] The blood pressure measurement device according to the above-mentioned aspect includes a cuff cover fixed to the back surface, having an opening for arranging the sensor unit, and covering a portion of the first pressing cuff and a portion of the second pressing cuff.

[0026] According to this embodiment, the back of the blood pressure measurement device, excluding the sensor portion, is covered by a cuff cover, and the first and second compression cuffs are partially covered by the cuff cover. Therefore, the portions of the first and second compression cuffs located on the back are protected by the cuff cover, and movement of the first and second compression cuffs away from the back is restricted.

[0027] In the blood pressure measurement device according to the above aspect, the device body includes a vent formed at a position on the rear surface separated from the sensor portion.

[0028] According to this aspect, the blood pressure measurement device can ventilate the inside and outside of the device body and prevent water from entering the inside. In addition, since the vent is provided at a position away from the sensor part, the vent is covered and protected by the cuff cover.

[0029] In the blood pressure measurement device according to the above-mentioned aspect, the sensor unit includes at least one of a PPG sensor, an SpO2 sensor, and an electrocardiogram electrode.

[0030] According to this aspect, the blood pressure measurement device can acquire at least one of the heart rate, saturation, and electrocardiogram waveform as biological information in addition to the blood pressure.

[0031] Effects of the Invention

[0032] According to the present invention, it is possible to provide a blood pressure measurement device that has excellent measurement accuracy even when the sensor unit is arranged on the back surface of the device body. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a perspective view showing the configuration of a blood pressure measurement device according to an embodiment of the present invention.

[0034] Figure 2 It is a side view showing the structure of the blood pressure measurement device.

[0035] Figure 3 This is a side view showing the structure of the blood pressure measurement device when it is worn on the wrist.

[0036] Figure 4 This is a block diagram showing the configuration of the blood pressure measurement device.

[0037] Figure 5 It is a cross-sectional view showing the main structure of the blood pressure measurement device.

[0038] Figure 6 This is a plan view showing the main configuration of the blood pressure measurement device from the back side of the device body.

[0039] Figure 7 It is a plan view showing the main structure of the blood pressure measurement device from the back side of the device body, with some structures omitted.

[0040] Figure 8 It is a perspective view showing the exploded structure of the device main body.

[0041] Figure 9 It is a perspective view showing the exploded structure of the device main body.

[0042] Figure 10 This is a block diagram showing an example of a fluid circuit of the blood pressure measurement device.

[0043] Figure 11 This is a plan view showing the main structure of a blood pressure measurement device according to another embodiment of the present invention, as viewed from the back side of the device body.

[0044] Figure 12 It is a side view showing the structure of a blood pressure measurement device according to another embodiment of the present invention.

[0045] Figure 13 This is a plan view showing the main structure of a blood pressure measurement device according to another embodiment of the present invention, as viewed from the back side of the device body.

[0046] Figure 14 This is a block diagram showing an example of a fluid circuit of the blood pressure measurement device.

[0047] Figure 15 This is a block diagram showing an example of a fluid circuit of the blood pressure measurement device. DETAILED DESCRIPTION

[0048] Below, use Figures 1 to 10 An example of the blood pressure measurement device 1 according to the embodiment of the present invention will be described.

[0049] Figure 1 It is a perspective view showing the configuration of a blood pressure measurement device 1 according to an embodiment of the present invention. Figure 2 is a side view showing the structure of the blood pressure measurement device 1. Figure 3 This is a side view showing the configuration of the blood pressure measurement device 1 in a state where the device is worn on the wrist 300 . Figure 4 It is a block diagram showing the configuration of the blood pressure measurement device 1 . Figure 5 It is a cross-sectional view showing the configuration of the device body 3 , a portion of the first cuff structure 4 , and a portion of the second cuff structure 5 of the blood pressure measurement device 1 . Figure 6 1 is a plan view showing the configuration of the device body 3, a portion of the first cuff structure 4, and a portion of the second cuff structure 5 of the blood pressure measurement device 1. Figure 7 This is a plan view showing the configuration of the device body 3 , a portion of the first cuff structure 4 , and a portion of the second cuff structure 5 of the blood pressure measurement device 1 , omitting the cuff cover 33 .

[0050] Figure 8 This is a perspective view showing the structure of the device body 3 from the top side after decomposition. Figure 9 It is a perspective view showing the structure of the device main body 3 from the bottom side in an exploded manner. Figure 10 This is a block diagram showing an example of the fluid circuit 24 of the blood pressure measurement device 1 .

[0051] like Figures 1 to 3As shown, the blood pressure measurement device 1 includes, for example, a device body 3, a first cuff structure 4, a second cuff structure 5, and a strap 6. The blood pressure measurement device 1 is configured such that the first cuff structure 4 and the second cuff structure 5 extend from the device body 3 in directions opposite to the device body 3, and the strap 6 covers the first cuff structure 4 and the second cuff structure 5, and can be fixed to a wrist 300 of a living body via the strap 6.

[0052] like Figures 1 to 4 As shown, the device body 3 includes, for example, a housing 11, a display unit 12, an operating unit 13, a pump 14, an acceleration sensor 15, a valve 16, a pressure sensor 17, a battery 18, a communication unit 19, a biosensor 20, a charging circuit unit 21, a memory 22, a processor 23, a fluid circuit 24, and a substrate 25.

[0053] The housing 11 is a casing that houses the components of the device body 3. For example, the housing 11 houses a display unit 12, an operating unit 13, a pump 14, an acceleration sensor 15, a valve 16, a pressure sensor 17, a battery 18, a communication unit 19, a biosensor 20, a charging circuit unit 21, a memory 22, a processor 23, a fluid circuit 24, and a substrate 25.

[0054] The housing 11 includes, for example, a shell shell 31 , a windshield 32 covering an upper opening of the shell shell 31 , and a cuff cover 33 provided below the shell shell 31 .

[0055] The outer shell 31 is formed into a bottomed cylindrical shape, such as a circular, rectangular, or polygonal cylindrical shape. In this embodiment, the outer shell 31 is formed into a bottomed rectangular cylindrical shape. Specifically, the outer shell 31 includes a rectangular cylindrical peripheral wall portion 31a; a bottom portion 31b provided on the peripheral wall portion 31a; and a pair of ring portions 31c provided on a pair of opposite sides of the outer circumference of the peripheral wall portion 31a.

[0056] The peripheral wall portion 31a includes, for example, an opening 31d for accommodating a portion of the operating portion 13. For example, the opening 31d is formed on a side of the peripheral wall portion 31a that is different from the two sides on which the pair of ring portions 31c are provided. Alternatively, for example, two openings 31d may be formed on one side of the peripheral wall portion 31a.

[0057] The bottom portion 31b constitutes the back side (bottom portion 31b) of the housing 11 (outer shell 31) facing the wrist 300. The bottom portion 31b protrudes, for example, so that a portion can contact the wrist 300. For example, the bottom portion 31b has a protrusion 31b1 formed by a rectangular protrusion at the center of the outer surface and a rectangular depression at the center of the inner surface of the bottom portion 31b. Furthermore, the bottom portion 31b is formed with: a plurality of windows 31b2 for accommodating the biosensor 20; and a plurality of holes 31b3 for accommodating the connectors 73 and 83, described later, which serve as components for fluidly connecting the first and second cuff structures 4 and 5 to the pump 14.

[0058] The biosensor 20 is disposed on the inner surface of the protrusion 31b1. The protrusion 31b1 constitutes a sensor unit that includes at least one of the biosensor 20 and the charging terminal 214, which are disposed on the back surface of the housing 11. Here, the biosensor 20 and the charging terminal 214 disposed on the back surface of the housing 11 refer to the situation where a portion of the components constituting the biosensor 20 are exposed on the back surface of the housing 11 or are disposed on the back surface of the housing 11 via a member other than the first cuff assembly 4 and the second cuff assembly 5 (for example, the cover 31b5 described below).

[0059] The window portion 31b2 is formed in the protrusion 31b1. Figure 5 As shown, the window portion 31b2 is formed by a plurality of openings 31b4 formed at a plurality of locations of the protrusion 31b1 and a light-transmitting cover 31b5 made of glass, resin, or the like covering the openings 31b4. The cover 31b5 covers the outer surface of the protrusion 31b1, for example.

[0060] Multiple holes 31b3 are formed in the bottom portion 31b between the protrusion 31b1 and each ring portion 31c. In this embodiment, three holes 31b3 are formed between the protrusion 31b1 and one ring portion 31c, and three holes 31b3 are formed between the protrusion 31b1 and the other ring portion 31c. These three holes 31b3 are arranged in a direction, for example, perpendicular to the direction in which the pair of ring portions 31c face each other. Specifically, in the bottom portion 31b, which serves as the back surface of the housing 11, at one end in one direction, the three holes 31b3 for securing a portion of the first cuff structure 4 are positioned away from the protrusion 31b1. At the other end in the same direction, the three holes 31b3 for securing another portion of the first cuff structure 4 to the second cuff structure 5 are positioned away from the protrusion 31b1 in the other direction.

[0061] Furthermore, the bottom portion 31b is formed with a slit-shaped ventilation opening 31b6 extending in one direction. The bottom portion 31b is provided with a waterproof and moisture-permeable sheet 31b7 covering the ventilation opening 31b6. The waterproof and moisture-permeable sheet 31b7 is formed to prevent water from entering the housing 11 from the outside through the ventilation opening 31b6 in the bottom portion 31b, while allowing ventilation between the inside and the outside of the housing 11. The ventilation opening 31b6 and the waterproof and moisture-permeable sheet 31b7 are located so as not to overlap with the first cuff structure 4 and the second cuff structure 5 fixed to the bottom portion 31b, that is, to be separated from the first cuff structure 4 and the second cuff structure 5. For example, in a direction perpendicular to the opposing direction of the pair of ring portions 31c, the flow path body 72 of the first pressing cuff 52 (described later) of the first cuff structure 4 is located adjacent to one side of the protrusion 31b1, and the ventilation opening 31b6 and the waterproof and moisture-permeable sheet 31b7 are located adjacent to the other side of the protrusion 31b1.

[0062] The loop portion 31c is formed to allow the strap 6 to pass through, secure the strap 6, or fold it back. For example, the loop portion 31c is a rectangular ring-shaped member with an opening that is long in one direction, through which the strap 6 can be inserted. The loop portion 31c is integrally formed with the outer surface of the outer shell 31. One of the pair of loop portions 31c secures one end of the strap 6, while the other loop portion 31c folds the strap 6 back.

[0063] The windshield 32 has the same shape as the outer periphery of the outer shell 31 and is a rectangular glass plate in this embodiment. It should be noted that the windshield 32 can be made of any transparent or light-transmitting material and is not limited to a glass plate.

[0064] The cuff cover 33 covers the bottom 31b of the outer shell 31. The cuff cover 33 is provided with a protrusion 31b1 on the bottom 31b and has an opening 33a formed therein to expose the protrusion 31b1 to the outside. For example, the cuff cover 33 is formed with a thickness and shape such that, when secured to the bottom 31b, the protrusion 31b1 protrudes from the main surface of the cuff cover 33 facing the wrist 300. Furthermore, for example, the cuff cover 33 has screw holes 33b formed at its four corners, and is removably secured to the bottom 31b of the outer shell 31 of the housing 11 using screws or the like.

[0065] The cuff cover 33 covers the ends of the first and second cuff structures 4 and 5 located at the bottom 31b, positioning the ends of the first and second cuff structures 4 and 5 in the gap created between the cuff cover and the bottom 31b, and securing the first and second cuff structures 4 and 5 to the bottom 31b. Specifically, the cuff cover 33 covers a portion of the flow path 72 and the connection 73 of the first pressing cuff 52, described later; the flow path 82 and three connection portions 83 of the sensing cuff 54; and the flow path 92 and two connection portions 93 of the second pressing cuff 62. Furthermore, the cuff cover 33 restricts movement of the covered portions of the first pressing cuff 52, the sensing cuff 54, and the second pressing cuff 62 away from the bottom 31b, thereby securing the first and second cuff structures 4 and 5. Note that the cuff cover 33 may also have a cushioning member between it and the first and second cuff structures 4 and 5.

[0066] The display unit 12 is positioned directly below the windshield 32. The display unit 12 is electrically connected to the processor 23. The display unit 12 is, for example, a liquid crystal display or an organic electroluminescent display. Specifically, the display unit 12 is an OLED (Organic Light Emitting Diode). The display unit 12 displays various information, including the date and time, blood pressure values ​​such as maximum and minimum blood pressure, heart rate and other measurement results, and the charge status and remaining charge of the battery 18. The display unit 12 is, for example, formed to have the same shape as the windshield 32 or slightly smaller than the windshield 32 when viewed from above.

[0067] The operating unit 13 is configured to receive user commands. For example, the operating unit 13 includes a plurality of buttons 41 provided on the housing 11; sensors that detect operation of the buttons 41; and a touch panel 43 provided on the display 12 or the windshield 32. User operations on the operating unit 13 convert commands into electrical signals. The sensors and touch panel 43 are electrically connected to the processor 23 and output electrical signals corresponding to the operations to the processor 23.

[0068] The pump 14 is, for example, a piezoelectric pump. The pump 14 compresses air, for example, as a fluid, and supplies the compressed air via the fluid circuit 24 to the air bladder 71 of the first compression cuff 52 and the air bladder 81 of the sensing cuff 54 (described later) of the first cuff structure 4, as well as the air bladder 91 of the second compression cuff 62 (described later) of the second cuff structure 5. The pump 14 is electrically connected to the processor 23.

[0069] The acceleration sensor 15 is, for example, a triaxial acceleration sensor. The acceleration sensor 15 measures acceleration and outputs an analog signal. The acceleration sensor 15 is connected to the processor 23 via, for example, an A / D (analog to digital) conversion circuit.

[0070] Valve 16 is, for example, an on-off valve. Valve 16 opens and closes the fluid circuit connecting pump 14 with first cuff structure 4 and / or second cuff structure 5 in fluid circuit 24, and / or the fluid circuit connecting first cuff structure 4 with the outside (atmosphere). Valve 16 is electrically connected to processor 23. For example, valve 16 is opened and closed under the control of processor 23.

[0071] As a specific example, the valve 16 is a safety valve that releases the air supplied to the first pressing cuff 52, the second pressing cuff 62, and the sensing cuff 54 described later of the first cuff structure 4 to the atmosphere. For example, when air is supplied to the first pressing cuff 52 and the sensing cuff 54 when measuring blood pressure, the valve 16 is switched to a closed state by being controlled by the processor 23. In addition, when the first pressing cuff 52 and the sensing cuff 54 are exhausted, the valve 16 is switched from a closed state to an open state by being controlled by the processor 23. In addition, the valve 16 can also be formed to be able to adjust the opening. It should be noted that the valve 16 can also be provided on the fluid circuit 24, and can also be provided integrally inside the housing of the pump 14.

[0072] The pressure sensor 17 is provided, for example, in the fluid circuit 24. The pressure sensor 17 detects the pressure of the first compression cuff 52 and / or the sensing cuff 54. For example, the pressure sensor 17 detects the pressure of the sensing cuff 54. The pressure sensor 17 is electrically connected to the processor 23 via, for example, an A / D conversion circuit, converts the detected pressure into an electrical signal, and outputs the signal to the processor 23.

[0073] The battery 18 is, for example, a rechargeable and dischargeable secondary battery such as a lithium-ion battery. The battery 18 is electrically connected to the processor 23. The battery 18 supplies power to the processor 23. The battery 18 supplies power to drive the various components of the processor 23 and also supplies power to drive the display unit 12, the operating unit 13, the pump 14, the acceleration sensor 15, the valve 16, the pressure sensor 17, the communication unit 19, and the biosensor 20 via the processor 23.

[0074] The communication unit 19 is configured to transmit and receive information with external devices via wireless and / or wired communication. For example, the communication unit 19 is a wireless communication module that complies with wireless communication standards. For example, the communication unit 19 transmits information obtained under the control of the processor 23, such as measured blood pressure and pulse information, to the external device. Furthermore, the communication unit 19 receives software update programs from the external device and transmits them to the control unit. In this embodiment, the external device is, for example, a smartphone, tablet computer, personal computer, smartwatch, or other external terminal.

[0075] In this embodiment, the communication unit 19 can be connected to an external terminal directly or via a network. The communication unit 19 can also be connected to an external terminal via a mobile communication network such as 4G (fourth generation mobile communication technology) or 5G (fifth generation mobile communication technology), or a wireless communication line such as WiMAX (World Interoperability for Microwave Access), or Wi-Fi (registered trademark). Furthermore, the communication unit 19 can be connected to an external device via wireless communication means such as BLE (Bluetooth (registered trademark) Low Energy), NFC (Near Field Communication), or infrared communication. Furthermore, the communication unit 19 may include, in addition to a wireless communication module, a general-purpose connector such as a micro-USB (Universal Serial Bus), or a dedicated connector for the blood pressure measurement device 1. It can also be connected to an external terminal directly via various cables such as a USB cable, or via a wired communication line such as a LAN (Local Area Network) connection. Therefore, the communication unit 19 may also include multiple communication means such as a wireless antenna and a micro-USB connector. It should be noted that the connector for wired communication may be a dedicated connector for the blood pressure measurement device 1 .

[0076] The biosensor 20 is a sensor configured to detect biological information by contacting or facing the wrist 300. The biosensor 20 converts the detected biological information into an electrical signal and outputs it to the processor 23. The biosensor 20 may be, for example, a sensor that measures physical quantities such as heart rate and body temperature, or a sensor that measures chemical quantities such as blood sugar and blood oxygen concentration. In this embodiment, the biosensor 20 includes, for example, a PPG sensor 20a, an SpO2 sensor 20b, and an ECG sensor 20c.

[0077] For example, the PPG sensor 20a measures the heart rate using photoplethysmography.For example, the PPG sensor 20a includes a first LED 20d, a second LED 20e, and a first PD (photodiode) 20f.

[0078] For example, the SpO2 sensor 20b measures saturation (transcutaneous arterial oxygen saturation). The SpO2 sensor 20b includes a second LED 20e and a second PD 20g. Here, for example, the PPG sensor 20a and the SpO2 sensor 20b share the second LED 20e.

[0079] For example, the ECG sensor 20c measures the current in the heart and acquires an electrocardiogram waveform. For example, the ECG sensor 20c includes a pair of electrocardiogram electrodes 20c1.

[0080] The charging circuit unit 21 includes, for example, an antenna unit 211, a power receiving unit 212, a charging unit 213, and a charging terminal 214. The charging circuit unit 21 charges the battery 18 using wired power and / or wireless power. For example, the charging circuit unit 21 charges the battery 18 by receiving power transmitted from the antenna unit 103 of the external power transmission device 100 using the antenna unit 211. Alternatively, the charging circuit unit 21 charges the battery 18 by receiving power transmitted from the power transmission terminal 104 of the external power transmission device 100 using the charging terminal 214. Specifically, the charging circuit unit 21 charges the battery 18 by selectively receiving power from the power transmission device 100 using the antenna unit 211 and the charging terminal 214. Note that the charging circuit unit 21 can be configured to support both wired and wireless power supply, or it can be configured to support only one of the two.

[0081] Antenna unit 211 receives power transmitted from antenna unit 103 of power transmission device 100. Antenna unit 211 is, for example, a power receiving coil serving as a power receiving resonant circuit. Antenna unit 211 supplies the received power to power receiving unit 212. The power receiving surface of antenna unit 211 is formed into a planar shape. Antenna unit 211 is, for example, disposed within housing 11. As a specific example, antenna unit 211 is disposed within housing 11, adjacent to display unit 12 on the side of display unit 12 opposite windshield 32. Antenna unit 211 includes, for example, a resonant capacitor, forming a power receiving resonant circuit.

[0082] Power receiving unit 212 rectifies the power received via antenna unit 211 or charging terminal 214 and supplies it to charging unit 213. Specifically, power receiving unit 212 rectifies the power supplied from antenna unit 211, converting it from AC to DC. For example, power receiving unit 212 includes a rectifier circuit and a control circuit. The control circuit controls the operation of the rectifier circuit and outputs the rectified DC power to charging unit 213.

[0083] Charging unit 213 supplies the electric power supplied from power receiving unit 212 to battery 18 as charging power. For example, charging unit 213 converts the electric power supplied from power receiving unit 212 into a predetermined current value and voltage value and supplies the converted electric power to battery 18. Furthermore, charging unit 213 may include a circuit for outputting the charge status of battery 18 to power receiving unit 212 and / or processor 23, for example.

[0084] The charging terminal 214 includes, for example, a pair of terminals 214 a , and receives the transmission power from the power transmission terminal 104 of the power transmission device 100 via the pair of terminals 214 a .

[0085] The memory 22 includes, for example, RAM (Random Access Memory) and ROM (Read Only Memory). The memory 22 stores various data. For example, the memory 22 pre-stores various program data, such as programs and applications, for controlling the entire blood pressure measurement device 1 and the pump 14 in a changeable manner; setting data for setting various functions of the blood pressure measurement device 1; calculation data for calculating blood pressure values ​​based on the pressure measured by the pressure sensor 17; and calculation data for calculating biological information such as heart rate, saturation, and electrocardiogram waveforms based on information measured by the biosensor 20.

[0086] The processor 23 controls the overall operation of the blood pressure measurement device 1 and the operation of the pump 14 and valve 16 based on the program stored in the memory 22, thereby performing predetermined operations (functions). In addition, the processor 23 performs predetermined calculations, analysis, processing, etc. according to the read program. The processor 23 is a computing device such as a CPU (Central Processing Unit). In addition to including a main CPU, the processor 23 may also include a sub-CPU. In addition, the processor 23 displays the status and results of various actions performed and calculations, analysis, processing, etc. on the display unit 12 through programs or applications.

[0087] The fluid circuit 24 fluidically connects at least two of the pump 14, valve 16, pressure sensor 17, first cuff structure 4, and second cuff structure 5, located within the housing 11. The fluid circuit 24 may include, for example, a tube or flow plate 24a that forms a flow path for the fluid supplied from the pump 14 to the first cuff structure 4; a single or multiple throttle members 24b that act as flow control elements to control the amount and pressure of the fluid supplied to the first cuff structure 4 and / or second cuff structure 5; and a check valve that controls the direction of fluid flow. The flow plate 24a is formed by joining multiple plates formed of a resin or metal material to a sheet or double-sided tape with slits formed between adjacent plates, forming a flow path. It should be noted that the multiple throttle members 24b may be located within the flow plate 24a or may be located in a portion of the first cuff structure 4 or second cuff structure 5.

[0088] The substrate 25 includes, for example, a control substrate 25 a , a sensor main substrate 25 b , and a sensor sub-substrate 25 c .

[0089] On the control substrate 25 a , for example, the acceleration sensor 15 , the valve 16 , the pressure sensor 17 , the communication unit 19 , the circuit configuration of the charging circuit unit 21 , the memory 22 , and the processor 23 are mounted.

[0090] A first LED 20 d , a second LED 20 e , a first PD 20 f , and a second PD 20 g for the PPG sensor 20 a and the SpO 2 sensor 20 b are mounted in the sensor main substrate 25 b .

[0091] Various circuits and electronic components constituting the PPG sensor 20a, the SpO2 sensor 20b, and the ECG sensor 20c are mounted on the sensor sub-substrate 25c. For example, the control substrate 25a, the sensor main substrate 25b, and the sensor sub-substrate 25c are electrically connected.

[0092] Below, use Figures 1 to 3 、 Figure 5 A specific example of the first cuff structure 4 will be described. Figures 1 to 3 、 Figure 5 As shown, the first cuff structure 4 includes a first collar 51, a first pressing cuff 52, a back plate 53, and a sensing cuff 54. For example, the first cuff structure 4 includes the first collar 51, the first pressing cuff 52, the back plate 53, and the sensing cuff 54. The first cuff structure 4 is constructed by sequentially stacking the first collar 51, the first pressing cuff 52, the back plate 53, and the sensing cuff 54 toward the wrist 300. It should be noted that the first cuff structure 4 may also be constructed without the first collar 51 and / or the back plate 53.

[0093] For example, one end of the first collar 51 is fixed to the bottom 31b of the housing 11 on the wrist 300 side. The first collar 51 is formed into a band-like shape that curves to follow the circumferential shape of the wrist 300. The first collar 51 is made of a resin material. The first collar 51 is made of a low-hardness material that is flexible and has shape retention. Flexibility here means that the first collar 51 deforms radially when external force is applied from the strap 6. Shape retention means that the first collar 51 maintains its pre-set shape when no external force is applied. Specifically, the first collar 51 is made of a resin material that has a hardness that allows for elastic deformation, such as bending deformation, which changes the shape, particularly the curvature, of the curved portion. Therefore, the first collar 51 is elastically deformable. By bending in response to external force, the internal space for the wrist 300 to be accommodated can be enlarged or reduced, following the shape of the wrist to be worn. For example, the first collar 51 is formed of thermoplastic polyurethane resin (hereinafter referred to as TPU) or polypropylene resin.

[0094] One end of the first collar 51 is fixed to the housing 11. The first collar 51 is formed to a length such that, when the blood pressure measurement device 1 is worn on the wrist 300 with the longest circumference of the assumed user, it faces at least one of the two arteries 311 and 312. Preferably, the first collar 51 is formed to a length such that, when the blood pressure measurement device 1 is worn on the wrist 300 with the longest circumference of the assumed user, it faces both arteries 311 and 312. Furthermore, the first collar 51 is set to a length such that, when the blood pressure measurement device 1 is worn on the wrist 300 with the shortest circumference of the assumed user, the other end does not contact the device body 3. For example, the first collar 51 is curved at a predetermined radius of curvature so that the portion extending from the housing 11 of the device body 3 follows the shape of the left or right side of the wrist 300 and the palm side of the wrist 300.

[0095] The first compression cuff 52 is secured to the inner circumferential surface of the first collar 51 using double-sided tape, adhesive, heat fusion, or the like. The first compression cuff 52 is fluidically connected to the pump 14 via the fluid circuit 24. One main surface of the first compression cuff 52 is secured to the inner surface of the first collar 51. The first compression cuff 52 inflates to press the back of the wrist 300 and pushes the back plate 53 and sensing cuff 54 toward the wrist 300.

[0096] The first compression cuff 52 includes, for example, a single or multiple air bags 71, a fluid path 72 provided at the end of the air bag 71, and a connection portion 73, such as a pipe joint, provided on the fluid path 72 and connected to the fluid circuit 24. The air bag 71 is a bag-shaped structure. In this embodiment, the blood pressure measurement device 1 utilizes air via the pump 14, so an air bag will be used for the description. However, when using a fluid other than air, any bag-shaped structure that expands with the fluid may be used. The air bag 71 is formed into a rectangular bag shape that is elongated in one direction.

[0097] The air bag 71 is formed into a bag shape by heat-welding multiple sheet members, for example. For example, if the first compression cuff 52 includes multiple air bags 71, the multiple air bags 71 are stacked and integrated by welding, for example, to form a fluid-connected structure. The sheet member forming the air bag 71 is formed, for example, from a thermoplastic elastomer. Here, the thermoplastic elastomer is, for example, TPU.

[0098] The flow path body 72 is provided integrally with a portion of an edge portion of one side in the long dimension direction of the air bag 71, for example. The flow path body 72 is formed by a portion of two sheet members among the plurality of sheet members forming the air bag 71. In addition, the flow path body 72 is formed in a shape that is long in one direction with a width smaller than the width in the short dimension direction of the air bag 71. The flow path body 72 is provided integrally with a connection portion 73 at the top end. The flow path body 72 is connected to the fluid circuit 24 via the connection portion 73, forming a flow path between the fluid circuit 24 and the air bag 71. The thickness of the flow path body 72 when inflated is smaller than the thickness of the air bag 71 when inflated.

[0099] For example, one connection portion 73 is provided. One connection portion 73 is connected to the fluid circuit 24 via one hole portion 31 b 3 formed in the bottom portion 31 b .

[0100] It should be noted that, for example, the flow path body 72 extends from one end side of the bottom 31b to the other end side in the opposing direction of the pair of ring portions 31c in order to avoid the protrusion 31b1 formed on the bottom 31b, adjacent to the protrusion 31b1, and the connecting portion 73 is connected to one of the three hole portions 31b3 formed at the end portion of the bottom 31b on the side from which the second cuff structure 5 protrudes.

[0101] The back plate 53 is secured to the wrist 300-side surface of the first compression cuff 52 using double-sided tape, adhesive, or the like. The back plate 53 is formed of a resin material. For example, the back plate 53 is formed in the shape of a rectangular plate that is elongated in one direction. It should be noted that the back plate 53 may also be segmented, i.e., formed by arranging multiple rectangular pieces in one direction. The back plate 53 exhibits shape-adaptive properties.

[0102] Here, shape conformability refers to the function of the back plate 53 being able to deform in a manner that imitates the shape of the contacted part of the wrist 300 to be configured. The contacted part of the wrist 300 refers to the area of ​​the wrist 300 that contacts the back plate 53. The contact here includes both direct contact with the back plate 53 and indirect contact with the back plate 53 through the sensing cuff 54.

[0103] The sensing cuff 54 is fixed to the main surface of the back plate 53 on the wrist side. The sensing cuff 54 is in direct contact with the area of ​​the wrist 300 where the arteries 311 and 312 are located, or is in indirect contact via a cover or the like. The sensing cuff 54 is formed into a rectangular shape that is elongated in one direction. It should be noted that the sensing cuff 54 may also be configured to contact the area of ​​the wrist 300 where the arteries 311 and 312 are located. The sensing cuff 54 is the same as or smaller than the first compression cuff 52 in the longitudinal direction. Furthermore, the sensing cuff 54 is the same as or smaller than the first compression cuff 52 in the transverse direction, or larger than the back plate 53. The sensing cuff 54 is the same shape as or smaller than the back plate 53 in the longitudinal and width directions of the back plate 53. The sensing cuff 54 compresses the area of ​​the artery on the palm side of the wrist by inflating. The sensing cuff 54 is pressed toward the living body via the back plate 53 by the inflated first pressing cuff 52 .

[0104] As a specific example, the sensing cuff 54 includes an air bladder 81, a fluid path 82 fluidically connected to the air bladder 81, and a connection portion 83, such as a pipe joint, provided on the fluid path 82. The air bladder 81 and the fluid path 82 are formed into a bag shape by, for example, heat-welding a plurality of sheet members. The sheet members forming the air bladder 81 and the fluid path 82 are formed, for example, from a thermoplastic elastomer. Here, the thermoplastic elastomer is, for example, TPU.

[0105] Here, the air bag 81 is a bag-like structure. In this embodiment, the blood pressure measurement device 1 uses air via the pump 14, so the description will use an air bag. However, when using a fluid other than air, the bag-like structure may be any fluid bag that expands with the fluid. The air bag 81 is configured in a rectangular shape that is elongated in one direction.

[0106] The flow path body 82 is provided integrally with a portion of an edge portion of one side in the longitudinal direction of the air bag 81, for example. The flow path body 82 is formed by a portion of two sheet members among the plurality of sheet members forming the air bag 81. In addition, the flow path body 82 is formed in a shape that is long in one direction with a width smaller than the width in the transverse direction of the air bag 81. The flow path body 82 is provided integrally with a connection portion 83 at the top end. The flow path body 82 is connected to the fluid circuit 24 via the connection portion 83, forming a flow path between the fluid circuit 24 and the air bag 81. The thickness of the flow path body 82 when inflated is smaller than the thickness of the air bag 81 when inflated.

[0107] For example, three connection portions 83 are provided. The three connection portions 83 are connected to three holes 31 b 3 formed at the end of the bottom portion 31 b on the side where the first cuff structure 4 protrudes. The three connection portions 83 are connected to the fluid circuit 24 .

[0108] Below, use Figures 1 to 3、 Figure 5 A specific example of the second cuff structure 5 will be described. Figures 1 to 3 、 Figure 5 As shown, the second cuff structure 5 includes a second collar 61 and a second pressing cuff 62. The second cuff structure 5 is constructed by sequentially stacking the second collar 61 and the second pressing cuff 62 toward the wrist 300.

[0109] The second collar 61 is fixed, for example, at one end to the bottom portion 31b of the housing 11 on the wrist 300 side. The second collar 61 is formed into a band-like shape that curves to follow the circumferential shape of the wrist 300. The second collar 61 is made of a resin material. The second collar 61 is made of a low-hardness material that exhibits flexibility and shape retention. Flexibility here means that the second collar 61 deforms radially when external force is applied from the strap 6. Shape retention means that the second collar 61 maintains its pre-set shape when no external force is applied. Specifically, the second collar 61 is made of a resin material with a hardness that allows for little or no compression deformation but allows for elastic deformation, such as bending, which changes the shape, particularly the curvature, of the curved portion. Therefore, the second collar 61 is elastically deformable in such a way that, when subjected to external force, it bends and deforms, thereby enlarging or reducing the internal space for the wrist 300 to conform to the shape of the wrist on which it is worn. For example, the second collar 61 is formed of thermoplastic polyurethane resin (hereinafter referred to as TPU) or polypropylene resin.

[0110] Furthermore, one end of the second collar 61 is fixed to the housing 11. Furthermore, the second collar 61 is formed to a length such that, when the blood pressure measurement device 1 is worn on the wrist 300 with the longest circumference of the assumed user, it faces at least one of the two arteries 311 and 312, and its end overlaps with the first cuff structure 4. Here, one of the two arteries 311 and 312 is the radial artery 311, and the other is the ulnar artery 312. Preferably, the second collar 61 is formed to a length such that, when the blood pressure measurement device 1 is worn on the wrist 300 with the longest circumference of the assumed user, it faces both arteries 311 and 312. Furthermore, the second collar 61 is set to a length such that, when the blood pressure measurement device 1 is worn on the wrist 300 with the shortest circumference of the assumed user, the other end of the collar 61 does not contact the device body 3. For example, the portion of the second collar 61 extending from the housing 11 of the device body 3 is curved with a predetermined curvature radius to follow the shape of the side of one of the left and right wrists 300 and the palm side of the wrist 300 .

[0111] The second pressing cuff 62 is fixed to the inner circumferential surface of the second clamping ring 61 using double-sided tape, adhesive, heat fusion, or the like. The second pressing cuff 62 is fluidically connected to the pump 14 via the fluid circuit 24. One main surface of the second pressing cuff 62 is fixed to the inner surface of the second clamping ring 61. The second pressing cuff 62 presses the opposing wrist 300 by inflating, and presses the overlapping first cuff structure 4 toward the wrist 300. The thickness of the second pressing cuff 62 when inflated is the same as or greater than the thickness of the first pressing cuff 52 when inflated.

[0112] The second compression cuff 62 includes, for example, a single or multiple air bags 91, a fluid path 92 provided at the end of the air bag 91, and a connection portion 93, such as a pipe joint, provided on the fluid path 92 and connected to the fluid circuit 24. The air bag 91 is a bag-shaped structure. In this embodiment, the blood pressure measurement device 1 utilizes air via the pump 14, so an air bag will be used for the description. However, if a fluid other than air is used, the bag-shaped structure may be any fluid bag that expands with the fluid. The air bag 91 is formed into a rectangular bag shape that is elongated in one direction.

[0113] The air bag 91 is formed into a bag shape by heat-welding multiple sheet members, for example. For example, when the second compression cuff 62 includes multiple air bags 91, the multiple air bags 91 are stacked and integrated by welding, for example, to form a fluid-connected structure. The sheet member forming the air bag 91 is formed, for example, from a thermoplastic elastomer. Here, the thermoplastic elastomer is, for example, TPU.

[0114] The flow path body 92 is provided integrally with a portion of an edge portion of one side in the long dimension direction of the air bag 91, for example. The flow path body 92 is formed by a portion of two sheet members among the plurality of sheet members forming the air bag 91. In addition, the flow path body 92 is formed in a shape that is long in one direction with a width smaller than the width in the short dimension direction of the air bag 91. The flow path body 92 is provided integrally with a connection portion 93 at the top end. The flow path body 92 is connected to the fluid circuit 24 via the connection portion 93, and constitutes a flow path between the fluid circuit 24 and the air bag 91. The thickness of the flow path body 92 when inflated is smaller than the thickness of the air bag 91 when inflated.

[0115] For example, two connection portions 93 are provided. The two connection portions 93 are connected to the fluid circuit 24 via two holes 31b3 formed in the bottom portion 31b.

[0116] Note that, for example, the connection portion 93 is connected to two of the three holes 31 b 3 formed in the end portion of the bottom portion 31 b on the side where the second cuff structure 5 protrudes.

[0117] The first pressing cuff 52 of the first cuff structure 4 and the second pressing cuff 62 of the second cuff structure 5, configured as described above, are formed to have such lengths that, when the blood pressure measurement device 1 is worn on the wrist 300 having the largest circumference, the inflated portion of at least one of the air bladder 71 of the first pressing cuff 52 or the air bladder 91 of the second pressing cuff 62 covers at least one of the two arteries 311 and 312, and at least a portion of the air bladder 91 overlaps with at least a portion of the air bladder 71. Furthermore, the first cuff structure 4 and the second cuff structure 5 are formed to have such lengths that, when the blood pressure measurement device 1 is worn on the wrist 300 having the smallest circumference, the ends of the first cuff structure 4 and the second cuff structure 5 do not contact the device body 3.

[0118] The strap 6 is formed in a band-like shape on the outer circumference of the first and second cuff structures 4 and 5, on the side opposite the wrist 300. The strap 6 is not fixed to the first and second cuff structures 4 and 5. One end of the strap 6 is fixed to one loop portion 31c. Furthermore, the strap 6 includes a pair of Velcro fasteners 6a, each with a hook on one side and a loop on the other. These fasteners engage with each other to secure the strap 6, with its end inserted into the other loop portion 31c. The strap 6 also includes a handle 6b at the other end to facilitate gripping by the user.

[0119] For example, the strap 6 is fixed to the loop portion 31c formed on the side extending from the second cuff structure 5, and is inserted into the loop portion 31c formed on the side extending from the first cuff structure 4, and then folded back. The strap 6 is of a length that can be inserted into the loop portion 31c provided on the contour housing 31 when the blood pressure measurement device 1 is worn on the wrist 300 with an assumed maximum circumference. In addition, the Velcro 6a is provided on the strap 6 with a length and configuration that can be folded back and fastened on the wrist 300 with the maximum circumference and the minimum circumference of the assumed wear. By stretching the end of the strap 6 after the loop portion 31c is folded back in a direction away from the loop portion 31c, as shown in FIG. Figure 3 As shown, the blood pressure measurement device 1 is attached to the wrist 300 with the first cuff structure 4 and the second cuff structure 5 wrapped around the wrist 300. By securing the strap 6 with the hook-and-loop fastener 6a, the first and second pressing cuffs 52, 62 are restricted from expanding outwardly, away from the wrist, thereby allowing the first and second pressing cuffs 52, 62 to compress the wrist. This allows blood pressure measurement using the well-known oscillometric method.

[0120] Next, use Figure 10 An example of the fluid configuration of the device body 3 , the first cuff structure 4 , the second cuff structure 5 , and the fluid circuit 24 of the blood pressure measurement device 1 configured in this manner will be described.

[0121] The first pressing cuff 52 is connected to the pump 14, for example, via the flow plate 24a. Furthermore, the first pressing cuff 52 and the pump 14 are connected to the valve 16, for example, via the flow plate 24a. Furthermore, the first pressing cuff 52 is connected to the second pressing cuff 62, for example, via the flow plate 24a. Furthermore, the first pressing cuff 52 is connected to the sensing cuff 54, for example, via the flow plate 24a and the throttle 24b provided on the flow plate 24a. The sensing cuff 54 is connected to the pressure sensor 17, for example, via the flow plate 24a. Furthermore, the sensing cuff 54 is connected to the atmosphere, for example, via the flow plate 24a and the throttle 24b provided on the flow plate 24a. Here, the throttle 24b between the first pressing cuff 52 and the sensing cuff 54 and the throttle 24b between the sensing cuff 54 and the atmosphere are set as flow chokes that provide a desired pressure difference between the first pressing cuff 52 and the sensing cuff 54.

[0122] Next, an example of the power transmission device 100 that transmits power to the charging circuit unit 21 of the device main body 3 will be described.

[0123] like Figure 4 As shown, power transmission device 100 includes a power supply 101, a power transmission unit 102, an antenna unit 103, and a power transmission terminal 104. Note that power transmission device 100 may also include only one of antenna unit 103 and power transmission terminal 104. Power supply 101 is, for example, an AC adapter connected to a commercial power source. Power supply 101 converts AC power input from the commercial power source into DC power and supplies the DC power to power transmission unit 102.

[0124] Power transmission unit 102 generates AC power as transmission power from DC power supplied from power supply 101 and supplies it to antenna unit 103. Power transmission unit 102 generates AC power having the same or substantially the same frequency as the resonant frequency of the power transmission resonant circuit of antenna unit 103, for example.

[0125] Antenna unit 103 is, for example, a power transmission coil serving as a power transmission resonant circuit. The power transmission surface of antenna unit 103 is formed in a planar shape. Antenna unit 103 transmits power to antenna unit 211 of device body 3. Antenna unit 103 includes, for example, a resonant capacitor, forming a power transmission resonant circuit.

[0126] The power transmission terminal 104 is formed so as to be contactable with a charging terminal 214 provided in the device body 3 and is fixed to the charging terminal 214 .

[0127] The blood pressure measurement device 1 thus configured has a first cuff structure 4 and a second cuff structure 5 extending from the device body 3 and fluidically connected to each other, arranged on both sides of the device body 3 in one direction. Furthermore, the device body 3 has a protruding portion (sensor portion) 31b1 on the bottom 31b of the housing 11, which is the back side of the device body 3, at a position separated from the first cuff structure 4 and the second cuff structure 5, for example, at the center of the bottom 31b, which serves as a space for accommodating at least one of the biosensor 20 and the charging terminal 214. This allows the first cuff structure 4 and the second cuff structure 5, as well as at least one of the biosensor 20 and the charging terminal 214, to be arranged on the back side of the device body 3.

[0128] Furthermore, the first cuff structure 4 and the second cuff structure 5 are fluidically connected via the fluid circuit 24 including the flow path plate 24a. It should be noted that the first pressing cuff 52 and the second pressing cuff 62 may also be directly fluidically connected to the first cuff structure 4 and the second cuff structure 5. With this configuration, even if the first cuff structure 4 and the second cuff structure 5 are provided and fixed to the housing 11 in one direction so as to be separated, the first cuff structure 4 and the second cuff structure 5 can be fluidically connected.

[0129] In addition, when the blood pressure measurement device 1 is worn on a wrist 300 having an assumed maximum circumference, the air bag 71 of the first compression cuff 52 covers the area where at least one of the two arteries 311 and 312 exists, and the air bag 91 of the second compression cuff 62 can overlap with at least a portion of the air bag 71 of the first compression cuff 52.

[0130] Therefore, the wrist 300 can be pressed by the first pressing cuff 52 and the second pressing cuff 62, so even if the air bag 71 of the first pressing cuff 52 and the air bag 91 of the second pressing cuff 62 are not arranged on the back of the device body 3, sufficient pressing force can be ensured to compress the artery.

[0131] Thus, in the blood pressure measurement device 1, when worn on a wrist 300 of the assumed maximum circumference, the air bag 71 of the first pressing cuff 52 and the air bag 91 of the second pressing cuff 62 overlap by a predetermined length. Furthermore, when the blood pressure measurement device 1 is worn on a wrist 300 of the minimum circumference, the first cuff structure 4 and the second cuff structure 5 are of a length that does not contact the device body 3. Furthermore, the first cuff structure 4 and the second cuff structure 5 are not directly connected to the strap 6.

[0132] With this configuration, in the blood pressure measurement device 1, the air bag 71 of the first pressing cuff 52 and the air bag 91 of the second pressing cuff 62 overlap and expand, thereby enabling the first pressing cuff 52 and the second pressing cuff 62 to appropriately compress the artery. Therefore, the blood pressure measurement device 1 can dispose the biosensor 20 on the back side of the device body 3 and can perform highly accurate blood pressure measurement even without disposing the air bag 71 of the first pressing cuff 52 and the air bag 91 of the second pressing cuff 62 on the back side of the device body 3.

[0133] The housing 11 also includes a vent 31b6 on the bottom 31b, covered by a waterproof and moisture-permeable sheet 31b7, enabling ventilation within the housing 11. Furthermore, by arranging the vent 31b6 at a location separate from the first and second cuff structures 4 and 5, outside of the protruding portion 31b1 of the bottom 31b, the vent 31b6 can be prevented from being blocked by the first and second cuff structures 4 and 5. Furthermore, by arranging the vent 31b6 at a location covered by the cuff cover 33, which is spaced apart from the bottom 31b, the vent 31b6 is protected by the cuff cover 33. Consequently, the blood pressure measurement device 1 can prevent contaminants from adhering to the vent 31b6 and the waterproof and moisture-permeable sheet 31b7, thereby preventing impairment of the ventilation function.

[0134] Furthermore, the ends of the first cuff structure 4 and the second cuff structure 5 disposed at the bottom 31b of the housing 11 are covered by the cuff cover 33. Therefore, movement of the first cuff structure 4 and the second cuff structure 5 away from the bottom 31b is restricted by the cuff cover 33. Therefore, the first cuff structure 4 and the second cuff structure 5 are prevented from being easily separated from the device body 3.

[0135] Furthermore, the blood pressure measurement device 1 is configured such that the various sensors 20a to 20c serving as the biosensor 20 and the charging terminal 214 are located on the bottom 31b of the device body 3. Therefore, the device body 3 does not need to be located away from the device body using the substrate 25 located inside the housing 11. This simplifies wiring and provides greater flexibility in configuration. Furthermore, the biosensor 20 is located within the highly rigid housing 11, ensuring stable contact with the wrist 300 when the blood pressure measurement device 1 is worn. This allows for appropriate acquisition of biometric information through the biosensor 20. Furthermore, by locating the charging terminal 214 on the bottom 31b, the charging terminal 214 is exposed when the blood pressure measurement device 1 is removed from the wrist 300, making charging using the charging terminal 214 easier.

[0136] Furthermore, in the blood pressure measurement device 1 , the first pressing cuff 52 and the second pressing cuff 62 are fluidically connected via the fluid circuit 24 provided in the device body 3 , thereby simplifying the placement of the first pressing cuff 52 and the second pressing cuff 62 on the bottom 31 b .

[0137] The blood pressure measurement device 1 configured in this manner can achieve good measurement accuracy even when the biosensor 20 is disposed on the back surface of the device main body 3 .

[0138] It should be noted that the present invention is not limited to the above-described embodiment. For example, in the above-described example, the first pressing cuff 52 of the first cuff structure 4 and the second pressing cuff 62 of the second cuff structure 5 are connected to, for example, the flow path plate 24a of the fluid circuit 24 via the flow path bodies 72 and 92 and the connecting portions 73 and 93 formed respectively, and are fluidically connected in the fluid circuit 24.

[0139] However, the first compression cuff 52 and the second compression cuff 62 may also be in direct fluid connection. Figure 11 As shown, the first cuff structure 4 and the second cuff structure 5 may also be configured such that the fluid path body 72 of the first pressing cuff 52 and the fluid path body 92 of the second pressing cuff 62 are integrally fluidically continuous and connected to the fluid circuit 24 via a connection portion 93 formed in the fluid path body 72 or the fluid path body 92. With this configuration, the first pressing cuff 52 and the second pressing cuff 62 are connected while avoiding the protrusion 31b1 serving as the sensor portion. This prevents the first pressing cuff 52 and the second pressing cuff 62 from interfering with the protrusion 31b1 and thereby hindering the functions of the biosensor 20 and the charging terminal 214 provided on the protrusion 31b1.

[0140] In the above example, the first cuff structure 4 includes the first collar 51 , the first pressing cuff 52 , the back plate 53 , and the sensing cuff 54 , and the second cuff structure 5 includes the second collar 61 and the second pressing cuff 62 .

[0141] However, the first cuff structure 4 may be configured without at least one of the first collar 51 and the back plate 53, and the second cuff structure 5 may be configured without the second collar 61. Figure 12 and Figure 13 As shown, the first cuff structure 4 may also be configured without the sensing cuff 54. For example, when the first cuff structure 4 is configured without the sensing cuff 54, as shown in FIG. Figure 14 and Figure 15As shown, it is sufficient to connect the pressure sensor 17 to at least the first pressing cuff 52 fluid and obtain the blood pressure based on the pressure of the first pressing cuff 52. In addition, in the case of not having the sensing cuff 54, as shown in FIG. Figure 14 As shown, the first compression cuff 52 and the second compression cuff 62 can also be fluidically connected via the fluid circuit 24 in the device body 3. Figure 15 As shown, for example, the flow path body 72 and the flow path body 92 may also be fluidically connected.

[0142] Furthermore, in the above example, the strap 6 is not fixed to the first cuff structure 4 and the second cuff structure 5. However, a configuration in which the strap 6 is fixed to the second cuff structure 5, which is positioned on the outer side when the first cuff structure 4 and the second cuff structure 5 overlap, may be employed. That is, even if the strap 6 is fixed to the second cuff structure 5, if the first cuff structure 4, which is closer to the wrist 300 than the second cuff structure 5, is not fixed to the strap 6, the first cuff structure 4 and the second cuff structure 5 can be tightly fastened and closely attached to the wrist 300 when the strap 6 is tightened.

[0143] In the above example, the device body 3 is configured such that the PPG sensor 20a, the SpO2 sensor 20b, and the ECG sensor 20c are provided as the biosensors 20 on the bottom 31b of the outer shell 31 forming the back side of the casing 11. However, the biosensor 20 may be any one of the PPG sensor 20a, the SpO2 sensor 20b, and the ECG sensor 20c. Furthermore, the device body 3 may be configured to include sensors that acquire other biometric information in addition to or in place of these sensors 20a to 20c.

[0144] That is, the present invention is not limited to the above-mentioned embodiments, and various modifications can be made in the implementation stage without departing from the scope of the main purpose. In addition, the various embodiments can also be implemented in combination as much as possible, in which case, the effect of the combination can be obtained. Moreover, the above-mentioned embodiments include inventions at various stages, and various inventions can be extracted by appropriate combinations of the disclosed multiple constituent elements. It should be noted that the present invention is not limited to the above-mentioned embodiments, and various modifications can be made in the implementation stage without departing from the scope of the main purpose. In addition, the various embodiments can also be implemented in combination as much as possible, in which case, the effect of the combination can be obtained. Moreover, the above-mentioned embodiments include various inventions, and various inventions can be extracted by combinations selected from the disclosed multiple constituent elements. For example, in the case where a problem can be solved and an effect can be obtained even if some constituent elements are deleted from all the constituent elements shown in the embodiment, the structure in which the constituent elements are deleted can be extracted as an invention.

[0145] Description of Reference Numerals

[0146] 1: Blood pressure measuring device;

[0147] 3: device body;

[0148] 4: first cuff structure;

[0149] 5: second cuff structure;

[0150] 6: strap;

[0151] 6a: Velcro;

[0152] 6b: pinch hand;

[0153] 11: Shell;

[0154] 12: Display unit;

[0155] 13: Operation unit;

[0156] 14: Pump;

[0157] 15: Acceleration sensor;

[0158] 16: valve;

[0159] 17: pressure sensor;

[0160] 18: Battery;

[0161] 19: Ministry of Communications;

[0162] 20: Biosensor;

[0163] 20a: PPG sensor;

[0164] 20b: SpO2 sensor;

[0165] 20c: ECG sensor;

[0166] 20c1: ECG electrodes;

[0167] 20d: first LED;

[0168] 20e: second LED;

[0169] 20f: first PD;

[0170] 20g: second PD;

[0171] 21: Charging circuit;

[0172] 22: memory;

[0173] 23: Processor;

[0174] 24: Fluid circuit;

[0175] 24a: Flow plate;

[0176] 24b: throttle element;

[0177] 25: substrate;

[0178] 25a: control substrate;

[0179] 25b: sensor main substrate;

[0180] 25c: sensor sub-substrate;

[0181] 31: outline shell;

[0182] 31a: peripheral wall;

[0183] 31b: bottom (back);

[0184] 31b1: protrusion (sensor portion);

[0185] 31b1: sensor unit;

[0186] 31b2: window;

[0187] 31b3: hole;

[0188] 31b4: opening;

[0189] 31b5: hood;

[0190] 31b6: vent;

[0191] 31b7: Waterproof and breathable sheet;

[0192] 31c: annulus;

[0193] 31d: opening;

[0194] 32: Windshield;

[0195] 33: cuff cover;

[0196] 33a: opening;

[0197] 33b: hole;

[0198] 41: button;

[0199] 43: touch panel;

[0200] 51: first clamping ring;

[0201] 52: First press the cuff;

[0202] 53: back panel;

[0203] 54: Sensing cuff;

[0204] 61: second clamping ring;

[0205] 62: Second compression cuff;

[0206] 71: air bag;

[0207] 72: Flow path body;

[0208] 73: connecting part;

[0209] 81: air bag;

[0210] 82: Flow path body;

[0211] 83: connecting part;

[0212] 91: air bag;

[0213] 92: Flow path body;

[0214] 93: connecting part;

[0215] 100: power transmission device;

[0216] 101: Power supply;

[0217] 102: Ministry of Power Transmission;

[0218] 103: antenna unit;

[0219] 104: power transmission terminal;

[0220] 211: antenna unit;

[0221] 212: Power receiving unit;

[0222] 213: Charging unit;

[0223] 214: Charging terminal;

[0224] 214a: terminal;

[0225] 300: wrist;

[0226] 311: radial artery;

[0227] 312: Ulnar artery.

Claims

1. A blood pressure measuring device, worn on a wrist via a strap, comprising: a device body comprising a housing, a pump disposed within the housing, a pressure sensor, a fluid circuit connected to the pump and the pressure sensor, and a sensor portion disposed on the back surface of the housing facing the wrist; a first compression cuff connected to the fluid circuit and fixed to one end in one direction of the back surface of the housing in a manner separate from the sensor portion; and A second compression cuff is connected to the fluid circuit, fixed to the other end of the back surface of the housing in the one direction in a manner separate from the sensor portion, and is fluidically connected to the first compression cuff. The first compression cuff and the second compression cuff are wrapped around the wrist via the strap. When the blood pressure measurement device is worn on a wrist with an assumed maximum circumference, at least one of the first pressing cuff and the second pressing cuff faces at least one of the radial artery and the ulnar artery passing through the wrist, and the first pressing cuff and the second pressing cuff overlap.

2. The blood pressure measurement device according to claim 1, wherein have: A sensing cuff is disposed on the wrist side of one of the first pressing cuff and the second pressing cuff and is connected to the fluid circuit.

3. The blood pressure measurement device according to claim 1, wherein The sensor section includes at least one of a biological sensor and a charging terminal.

4. The blood pressure measurement device according to claim 1, wherein The first compression cuff and the second compression cuff are fluidically connected via the fluid circuit provided in the device body.

5. The blood pressure measurement device according to claim 3, wherein The first pressing cuff and the second pressing cuff are fluidically connected to each other on the back surface avoiding the sensor portion.

6. The blood pressure measurement device according to claim 1, wherein have: A cuff cover is fixed to the back surface, has an opening for arranging the sensor unit, and covers a portion of the first pressing cuff and a portion of the second pressing cuff.

7. The blood pressure measurement device according to claim 6, wherein: The device body includes a vent formed at a position of the rear surface separated from the sensor portion.

8. The blood pressure measurement device according to claim 1, wherein The sensor unit includes at least one of a photoelectric plethysmography (PPG) sensor, a peripheral capillary oxygen saturation (SpO2) sensor, and an electrocardiogram (ECG) electrode.

Images