Blood pressure measuring device

Abstract

To provide a blood pressure measuring device capable of suppressing increase in a size and cost, and taking measures for static electricity.SOLUTION: A blood pressure measuring device 1 includes: a housing 11; a flow channel plate unit 22 stored in the housing 11, which is formed of a conductive material at least partially; a pump 14 connected to the flow channel plate unit 22; a pressure sensor 17 connected to the flow channel plate unit 22; a cuff 7 connected to the flow channel plate unit 22, which is fluidically connected to the pump 14 and the pressure sensor 17 through the flow channel plate unit 22; a printed board 231 stored in the housing 11, which has a GND; and at least one connection member 25 for connecting the GND of the printed board 231 and a portion formed of a conductive material of the flow channel plate unit 22.SELECTED DRAWING: Figure 3

Description

Technical Field

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

Background Art

[0002] In recent years, blood pressure measuring devices used for measuring blood pressure are used not only in medical facilities but also at home as a means for checking health conditions. A blood pressure measuring device measures blood pressure by detecting vibrations of an arterial wall, for example, by expanding and contracting a cuff wrapped around the upper arm or wrist of a living body and detecting the pressure of the cuff with a pressure sensor.

[0003] Since such a blood pressure measuring device uses electronic components, countermeasures against static electricity are required. As countermeasures against static electricity used in existing watches and wearable devices, a technique of connecting a metal housing to GND (see, for example, Patent Document 1) and a technique of providing a metal member inside and connecting the metal member to GND (see, for example, Patent Document 2) are known.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the above-described technique of connecting a metal housing to GND, there is a problem that the housing cannot be used as GND when the housing is made of resin or when the housing is used as an electrode. Further, in the technique of providing a metal member inside and connecting it to GND, an additional member is required for countermeasures against static electricity, and problems arise from the viewpoints of size and cost.

[0006] Therefore, the present invention aims to provide a blood pressure measuring device that can suppress increases in size and cost and implement measures against static electricity. [Means for solving the problem]

[0007] According to one embodiment, a blood pressure measuring device is provided, comprising: a housing; a flow channel plate unit housed within the housing and at least a portion of which is made of a conductive material; a pump connected to the flow channel plate unit; a pressure sensor connected to the flow channel plate unit; a cuff connected to the flow channel plate unit and fluidly connected to the pump and the pressure sensor via the flow channel plate unit; a printed circuit board housed within the housing and having a GND; and at least one connecting member connecting the GND of the printed circuit board to the portion of the flow channel plate unit made of the conductive material.

[0008] According to this embodiment, the blood pressure measuring device can perform static electricity countermeasures using the flow channel plate unit by connecting the GND of the printed circuit board to the flow channel plate unit with a connecting member. Furthermore, since the flow channel plate unit, which is a component necessary for the blood pressure measuring device to perform its function, is used for static electricity countermeasures, the increase in the number of parts required for static electricity countermeasures can be suppressed, thereby suppressing an increase in the size and cost of the blood pressure measuring device.

[0009] A blood pressure measuring device according to one embodiment described above is provided, wherein the flow channel plate unit comprises a first flow channel plate made of a metal material, a second flow channel plate made of a metal material, and an adhesive member for bonding the first flow channel plate and the second flow channel plate, and the connecting member is connected to at least one of the first flow channel plate and the second flow channel plate.

[0010] According to this embodiment, a connecting member only needs to be connected to at least one of the first channel plate and the second channel plate, which are made of a metal material, and there is a high degree of freedom in designing the connection position and other aspects.

[0011] A blood pressure measuring device according to one embodiment described above is provided, wherein the adhesive member includes a conductive material.

[0012] According to this embodiment, since the first channel plate and the second channel plate are bonded together with an adhesive member containing a conductive material, the first channel plate, the second channel plate, and the adhesive member become electrically conductive, increasing the volume of the channel plate unit connected to GND. Furthermore, since the first channel plate and the second channel plate are electrically conductive due to the adhesive member, the connecting member only needs to be connected to one of the first channel plate or the second channel plate. [Effects of the Invention]

[0013] The present invention provides a blood pressure measuring device that can suppress increases in size and cost and implement measures against static electricity. [Brief explanation of the drawing]

[0014] [Figure 1] A perspective view showing the configuration of a blood pressure measuring device according to the first embodiment of the present invention. [Figure 2] A block diagram showing the configuration of the blood pressure measuring device. [Figure 3] A perspective view illustrating the internal configuration of the blood pressure measuring device. [Figure 4] An exploded perspective view showing the configuration of the pump, on / off valve, pressure sensor, and flow path plate unit of the blood pressure measuring device. [Figure 5] A cross-sectional view showing the configuration of the pump, pressure sensor, flow path plate unit, pressure cuff, and sensing cuff of the blood pressure measuring device. [Modes for carrying out the invention]

[0015] Hereinafter, an example of a blood pressure measuring device 1 according to the first embodiment of the present invention will be described with reference to Figures 1 to 5.

[0016] FIG. 1 is a perspective view showing the configuration of the blood pressure measuring device 1. FIG. 2 is a block diagram showing the configuration of the blood pressure measuring device 1. FIG. 3 is a perspective view schematically showing the configuration inside the housing 11 of the blood pressure measuring device 1. FIG. 4 is an exploded perspective view showing the configuration of the pump 14, the on-off valve 16, the pressure sensor 17, and the flow path plate unit 22 of the blood pressure measuring device 1. FIG. 5 is a cross-sectional view showing the configuration of the pump 14, the pressure sensor 17, and the flow path plate unit 22 of the blood pressure measuring device 1.

[0017] The blood pressure measuring device 1 is an electronic blood pressure measuring device to be worn on a living body. In the example of the present embodiment, the blood pressure measuring device 1 is a wearable device to be worn on the wrist. The blood pressure measuring device 1 is, for example, an electronic blood pressure measuring device having a mode of measuring blood pressure from an artery.

[0018] As shown in FIGS. 1 to 5, the blood pressure measuring device 1 includes, for example, a device main body 3, a belt 4, a curler 5, a cuff structure (cuff) 7, and a fluid control unit 9.

[0019] The device main body 3 includes, for example, a housing 11, a display unit 12, an operation unit 13, a pump 14, an acceleration sensor 15, an on-off valve 16, a pressure sensor 17, a battery 18, a communication unit 19, a memory 20, a processor 21, a flow path plate unit 22, a mounting substrate 23, a charging circuit 24, and a connection member 25.

[0020] The housing 11 is a case for housing components. The housing 11 houses, for example, the display unit 12, the operation unit 13, the pump 14, the on-off valve 16, the pressure sensor 17, the battery 18, the communication unit 19, the memory 20, the processor 21, the flow path plate unit 22, and the mounting substrate 23.

[0021] The housing 11 includes, for example, an outer case 31, a windshield 32 that covers the upper opening of the outer case 31, and a back cover 35 that covers the lower part of the outer case 31.

[0022] The outer case 31 is formed in the shape of, for example, a cylinder, a rectangular tube, a polygonal tube, etc. In this embodiment, an example is shown in which the outer case 31 is formed in a cylindrical shape. The outer case 31 comprises a pair of lugs 31a provided at symmetrical positions in the circumferential direction of the outer surface, and spring bars 31b provided between the two pairs of lugs 31a. The windshield 32 is a circular glass plate.

[0023] The display unit 12 is positioned directly below the windshield 32. The display unit 12 is electrically connected to the processor 21. The display unit 12 is, for example, a liquid crystal display or an organic electroluminescent display. The display unit 12 displays various information, including the date and time, blood pressure values ​​such as systolic and diastolic blood pressure, and measurement results such as heart rate.

[0024] The control unit 13 is configured to accept commands from the user. The control unit 13 includes, for example, a plurality of buttons 41 provided on the housing 11, a sensor that detects the operation of the buttons 41, and a touch panel 43 provided on the display unit 12 or the windshield 32. The control unit 13 converts commands into electrical signals when operated by the user. The sensor and the touch panel 43 are electrically connected to the processor 21 and output electrical signals to the processor 21.

[0025] Pump 14 is, for example, a piezoelectric pump. Pump 14 compresses air, for example, and supplies the compressed air to the cuff structure 7 via the flow path plate unit 22. Pump 14 is electrically connected to the processor 21. Pump 14 is placed on top of the flow path plate unit 22. For example, pump 14 is bonded to the main surface of the flow path plate unit 22.

[0026] The acceleration sensor 15 is, for example, a 3-axis acceleration sensor. The acceleration sensor 15 measures acceleration and outputs an analog signal. The acceleration sensor 15 is connected to the processor 21, for example, via an A / D conversion circuit.

[0027] The on-off valve 16 is a safety valve that, for example, releases the air supplied to the pressing cuff 71 and sensing cuff 73 of the cuff structure 7 (described later) to the atmosphere. The on-off valve 16 is connected, for example, to the branch channel 22c1 of the first channel 22c that connects the pump 14 and the on-off valve 16 to the pressing cuff 71, as described later in the flow path plate unit 22. The on-off valve 16 is electrically connected to the processor 21. For example, the on-off valve 16 is opened and closed by the control of the processor 21.

[0028] The on-off valve 16 is a rapid exhaust valve that enables rapid exhaust by setting, for example, the opening degree of the on-off valve 16 or the opening area of ​​the first flow path 22c to minimize fluid resistance. When supplying air to the pressure cuff 71 and sensing cuff 73 during blood pressure measurement, the on-off valve 16 is switched to a closed state by control of the processor 21. Also, when exhausting the pressure cuff 71 and sensing cuff 73, the on-off valve 16 is switched from a closed state to an open state by control of the processor 21. Furthermore, the on-off valve 16 may be formed so that the opening degree can be adjusted. The on-off valve 16 may be integrally provided inside the housing of the pump 14.

[0029] The pressure sensor 17 is fluidically connected to the flow path section 22a. The pressure sensor 17 detects the pressure of, for example, the sensing cuff 73 of the cuff structure 7 via the flow path section 22a. The pressure sensor 17 is electrically connected to the processor 21, for example, via an A / D conversion circuit, which converts the detected pressure into an electrical signal and outputs it to the processor 21.

[0030] The battery 18 is a secondary battery, such as a lithium-ion battery. The battery 18 is electrically connected to the processor 21. The battery 18 supplies power to the processor 21. The battery 18 supplies power for driving each component of the processor 21, as well as the display unit 12, operation unit 13, pump 14, acceleration sensor 15, on / off valve 16, pressure sensor 17, and communication unit 19 via the processor 21.

[0031] The communication unit 19 is configured to send and receive information wirelessly or via wired connection with an external device. The communication unit 19 is, for example, a wireless communication module compliant with wireless communication standards. The communication unit 19 transmits information controlled by the processor 21, measured blood pressure values, pulse rate, and other information to an external device, and also receives software update programs and the like from the external device and sends them to the control unit. In this embodiment, the external device is, for example, an external terminal such as a smartphone, tablet, personal computer, or smartwatch.

[0032] In this embodiment, the communication unit 19 and external devices may be directly connected or connected via a network. The communication unit 19 and external devices may be connected via mobile communication networks such as 4G and 5G, or wireless communication lines such as WiMAX and Wi-Fi®. Alternatively, the communication unit 19 and external devices may be connected via wireless communication means such as Bluetooth®, NFC (Near Field Communication), and infrared communication. Furthermore, the communication unit 19 and external devices may be connected via wired communication lines such as USB (Universal Serial Bus) or LAN (Local Area Network) connection via cable. For this reason, the communication unit 19 may be configured to include multiple communication means such as a wireless antenna and a micro USB connector.

[0033] Memory 20 includes, for example, RAM (Random Access Memory) and ROM (Read Only Memory). Memory 20 stores various types of data. For example, memory 20 pre-stores program data for controlling the entire blood pressure measuring device 1 and the pump 14, setting data for setting various functions of the blood pressure measuring device 1, and calculation data for calculating blood pressure values ​​and pulse rates from the pressure measured by the pressure sensor 17, which can be modified.

[0034] The processor 21 controls the operation of the entire blood pressure measuring device 1, as well as the operation of the pump 14 and the on / off valve 16, based on the program stored in the memory 20, and performs predetermined operations (functions). The processor 21 also performs predetermined calculations, analyses, and processing according to the loaded program. The processor 21 is a computing device such as a CPU.

[0035] The flow path plate unit 22 is housed within the housing 11. The flow path plate unit 22 fluidly connects the pump 14, the on-off valve 16, the pressure sensor 17, and the cuffs 71 and 73 of the cuff structure 7, which will be described later. The flow path plate unit 22 has a flow path section 22a inside. The flow path section 22a also fluidly connects the cuffs 71 and 73 and the atmosphere via the on-off valve 16.

[0036] The flow channel plate unit 22 comprises a first flow channel plate 131, a second flow channel plate 132, and an adhesive member 133 for bonding the first flow channel plate 131 and the second flow channel plate 132. The flow channel section 22a is composed of the first flow channel plate 131, the second flow channel plate 132, and the adhesive member 133.

[0037] The first flow channel plate 131 has a flat surface facing the second flow channel plate 132. A pump 14, an on-off valve 16, and a pressure sensor 17 are fixed to the surface of the first flow channel plate 131 opposite to the surface facing the second flow channel plate 132. The first flow channel plate 131 has holes formed therein for fluid connection to the pump 14, holes for fluid connection to the on-off valve 16, and holes for fluid connection to the pressure sensor 17. The first flow channel plate 131 is made of a conductive material, such as a metal material. The first flow channel plate 131 is, for example, a metal plate. The thickness of the first flow channel plate 131 is, for example, 0.4 mm. The pump 14 is bonded to the surface of the first flow channel plate 131 opposite to the surface facing the second flow channel plate 132.

[0038] The second channel plate 132 has a flat surface facing the first channel plate 131. The second channel plate 132 and the first channel plate 131 are formed with substantially the same outer shape on their opposing surfaces. The second channel plate 132 is made of a conductive material, such as a metal material. The thickness of the second channel plate 132 is, for example, 0.4 mm.

[0039] The adhesive member 133 adheres the first channel plate 131 and the second channel plate 132. The adhesive member 133 has a notch 133a that, together with the first channel plate 131 and the second channel plate 132, forms the channel portion 22a when the two channels are adhered together. That is, the adhesive member 133 is formed to have a shape that is substantially the same as the outer shape of the opposing surfaces of each channel plate 131 and 132, and is formed by partially opening it to provide the notch 133a in a shape corresponding to the channel portion 22a.

[0040] The adhesive member 133 is, for example, double-sided tape. The material used for the adhesive member 133 is airtight. For example, the adhesive member 133 is double-sided tape having a base material made of an airtight material such as acrylic foam. The thickness of the adhesive member 133 is, for example, 0.2 mm.

[0041] Such adhesive members 133 are aligned with the first channel plate 131 and the second channel plate 132, for example, using alignment holes provided in the first channel plate 131 and the second channel plate 132. The adhesive members 133 are then fixed to the first channel plate 131 and the second channel plate 132, for example, by manual labor by a worker.

[0042] As a specific example, the flow path plate unit 22 is connected to the pump 14 and the cuff structure 7. The flow path portion 22a of the flow path plate unit 22 includes, for example, a first flow path 22c and a second flow path 22d.

[0043] The first flow path 22c fluidly connects the pump 14 and the on-off valve 16 to the pressure cuff 71. Specifically, the first flow path 22c has a branch flow path 22c1 that branches off on the secondary side of the pump 14. The branch flow path 22c1 is connected to the on-off valve 16. The second flow path 22d is a flow path connected to the pressure sensor 17.

[0044] As a specific example, the first channel plate 131 has a first hole 131a, a second hole 131b, and a third hole 131c. The holes 131a, 131b, and 131c penetrate the first channel plate 131.

[0045] The first hole 131a communicates with the discharge port of the pump 14. The first hole 131a constitutes part of the first flow path 22c. The first hole 131a is located, for example, on the central side of the first flow path plate 131. The second hole 131b is connected to the pressure sensor 17. The second hole 131b constitutes part of the second flow path 22d. The second hole 131b is located, for example, on the outer edge side of the first flow path plate 131. The third hole 131c is connected to the on-off valve 16. The third hole 131c constitutes part of the branch flow path 22c1. The third hole 131c is located, for example, on the outer edge side of the first flow path plate 131.

[0046] The second flow channel plate 132 comprises, for example, a flow channel plate body 132a and a nozzle 132b. The surface of the flow channel plate body 132a facing the first flow channel plate 131 is formed to be planar. The flow channel plate body 132a and the first flow channel plate 131 are formed to have substantially the same outer shape on their opposing surfaces. The flow channel plate body 132a is, for example, a metal plate.

[0047] The nozzle 132b is provided on the side of the flow channel plate body 132a opposite to the adhesive member 133. The nozzle 132b is connected to the cuff structure 7. The nozzle 132b is formed of, for example, resin. The nozzle 132b is integrally formed with the flow channel plate body 132a, for example, by insert molding.

[0048] As a specific example, nozzle 132b comprises a first nozzle 132b1 and a second nozzle 132b2. The first nozzle 132b1 communicates with the first flow path 22c. The first nozzle 132b1 is connected to the pressure cuff 71. The second nozzle 132b2 communicates with the second flow path 22d. The second nozzle 132b2 is connected to the sensing cuff 73.

[0049] The mounting board 23 is housed within the enclosure 11 and has various electronic components mounted on it. The mounting board 23 has, for example, a printed circuit board 231 on which digital circuit components such as a communication unit 19, memory 20, and processor 21, and analog circuit components such as an acceleration sensor 15, pressure sensor 17, PPG sensor, and electrocardiogram sensor are mounted. The mounting board 23 is a PCB (Printed Circuit Board) on which multiple electronic components are mounted. The mounting board 23 supplies fluid to the cuff structure 7 using the various electronic components mounted on it.

[0050] The printed circuit board 231 is, for example, a rigid board. Electronic components are mounted on both sides of the printed circuit board 231, for example. Patterned wiring is formed on the printed circuit board 231. The shape of the printed circuit board 231 in the direction of the main surface is, for example, larger than the main surface of the pump 14. The printed circuit board 231 is, for example, a multilayer board and has a ground layer. GND is provided on the printed circuit board 231. The printed circuit board 231 is fixed to the flow path plate unit 22, for example, via a spacer 232.

[0051] The charging circuit 24 includes, for example, an antenna unit 241, a power receiving unit 242, and a charging unit 243. The charging circuit 24 charges the battery 18 by wireless power transfer. For example, the charging circuit 24 receives power transmitted from the antenna unit of an externally provided power transmission device and charges the battery 18.

[0052] The antenna unit 241 receives power transmitted from the antenna unit of the power transmission device. The power receiving unit 242 rectifies the power received by the antenna unit 241 and supplies it to the charging unit 243. The charging unit 243 supplies the power supplied from the power receiving unit 242 to the battery 18 as power for charging. For example, the charging unit 243 converts the power supplied from the power receiving unit 242 into predetermined current and voltage values ​​and supplies them to the battery 18. In addition, the power receiving unit 242 and / or the charging unit 243 convert the power received by the antenna unit 241 from alternating current to direct current.

[0053] The connecting member 25 connects the flow path plate unit 22 to the GND of the printed circuit board 231. The connecting member 25 is made of, for example, a metal material. The shape of the connecting member 25 is set according to the shape and positional relationship of the flow path plate unit 22 and the printed circuit board 231. Various methods can be applied to connect the connecting member 25 to the flow path plate unit 22 and the printed circuit board 231, such as soldering, screwing, bonding with adhesive containing conductive material, clamping, inserting, and mechanical joining. The connecting member 25 is also connected to at least one of the first flow path plate 131 and the second flow path plate 132. In the example shown in Figure 3, the connecting member 25 is fixed to the first flow path plate 131 of the flow path plate unit 22 by screws 25a and fixed to the lands of the printed circuit board 231 by soldering.

[0054] As shown in Figure 1, the belt 4 comprises a first belt 61 provided on one pair of lugs 31a and spring bar 31b, and a second belt 62 provided on the other pair of lugs 31a and spring bar 31b.

[0055] The first belt 61 is called the "parent" and is constructed in the shape of a strip. The first belt 61 has a buckle 61c provided at one end. The first belt 61 is rotatably held in the outer case 31. The buckle 61c has a rectangular frame-shaped body 61d and a pin 61e that is rotatably attached to the frame-shaped body 61d. The second belt 62 is called the "tip" and is constructed in the shape of a strip with a width that allows it to be inserted into the frame-shaped body 61d. The second belt 62 also has a plurality of small holes 62a into which the pin 61e is inserted.

[0056] In this type of belt 4, the second belt 62 is inserted into the frame-like body 61d, and the rod 61e attached to the small hole 62a is inserted, thereby connecting the first belt 61 and the second belt 62 as a single unit, and together with the outer case 31, it forms a ring that conforms to the circumferential direction of the wrist.

[0057] Carla 5 is made of a resin material and is configured as a band that curves along the circumference of the wrist. Carla 5 is fixed, for example, at one end to the wrist side of the device body 3.

[0058] Furthermore, the curler 5 has a hardness that provides both flexibility and shape retention. Here, flexibility means that the shape deforms radially when an external force from the belt 4 is applied to the curler 5. Shape retention means that the curler 5 can maintain its pre-formed shape when no external force is applied. The curler 5 has a cuff structure 7 positioned on its inner circumferential surface.

[0059] As shown in Figure 1, the cuff structure 7 includes, for example, a pressing cuff 71, a back plate 72, and a sensing cuff 73. The cuff structure 7 is formed by stacking the pressing cuff 71, the back plate 72, and the sensing cuff 73 to form a single unit. The cuff structure 7 is fixed to the inner surface of the collar 5.

[0060] In this embodiment, the cuff structure 7 has a pressing cuff 71 connected to a sensing cuff 73 via a fluid control unit 9, and the sensing cuff 73 is connected to the atmosphere via the fluid control unit 9.

[0061] The compression cuff 71 is connected to the flow path plate unit 22. The compression cuff 71 is fluidically connected to the pump 14 via the flow path plate unit 22. One main surface of the compression cuff 71 is fixed to the inner surface of the collar 5. For example, the compression cuff 71 is attached to the inner surface of the collar 5 with double-sided tape or adhesive. The compression cuff 71 expands to press the back plate 72 and the sensing cuff 73 toward the living body.

[0062] The compression cuff 71 includes, for example, an air bladder 81. The air bag 81 is a bag-shaped structure, and in this embodiment, since the blood pressure measuring device 1 uses air via the pump 14, an air bag will be used as an example for explanation. However, if a fluid other than air is used, the bag-shaped structure may be a fluid bag such as a liquid bag.

[0063] The back plate 72 is attached to the wrist-side surface of the pressure cuff 71 using double-sided tape or adhesive. The back plate 72 is made of a resin material and is formed in a plate shape. For example, the back plate 72 is made of polypropylene and is formed in a plate shape with a thickness of about 1 mm. The back plate 72 has shape conformability.

[0064] Here, shape conformability refers to the function that the back plate 72 can deform to conform to the shape of the contact area of ​​the wrist where it is placed, the contact area of ​​the wrist refers to the area that comes into contact with the back plate 72, and contact here includes both direct and indirect contact.

[0065] The sensing cuff 73 is fixed to the main surface of the back plate 72 on the wrist side. The sensing cuff 73 makes direct contact with the area where the arteries of the wrist are located. The sensing cuff 73 is formed to be the same shape as the back plate 72, or smaller, in the longitudinal and width directions of the back plate 72. The sensing cuff 73 compresses the area where the arteries of the palm side of the wrist are located by inflating. The sensing cuff 73 is pressed against the body side via the back plate 72 by the inflated pressure cuff 71.

[0066] As a specific example, the sensing cuff 73 comprises one air bladder 91 and a flow channel 92. Here, the air bag 91 is a bag-shaped structure, and in this embodiment, since the blood pressure measuring device 1 uses air via the pump 14, an air bag will be used as an example. However, if a fluid other than air is used, the bag-shaped structure may be a liquid bag or the like.

[0067] The air bag 91 is configured in a rectangular shape that is long in one direction. The air bag 91 is constructed, for example, by combining two sheet members that are long in one direction and welding the edges together, for example, by heat.

[0068] The flow channel 92 is integrally provided, for example, on a part of one of the longitudinal edges of the air bag 91. The flow channel 92 is provided at the end of the air bag 91 closest to the device body 3. The flow channel 92 is also formed in a shape that is elongated in one direction and has a width smaller than the width dimension of the air bag 91. The flow channel 92 has, for example, a connecting portion at its tip. The flow channel 92 is connected to the flow channel section 22a via the connecting portion and constitutes a flow channel between the flow channel section 22a and the air bag 91.

[0069] The fluid control unit 9 controls, for example, the amount of air supplied to the cuffs 71 and 73. The fluid control unit 9 is, for example, a fluid resistance such as an orifice or a check valve. In this embodiment, the fluid control unit 9 includes, for example, a plurality of flow resistances. The fluid control unit 9 controls the air pressure ratio of the two cuffs 71 and 73 to be constant by, for example, the flow resistance ratio of the plurality of flow resistances.

[0070] The fluid control unit 9 generates a pressure difference between the pressure cuff 71 and the sensing cuff 73 using multiple flow resistances, and controls the pressure ratio between the pressure cuff 71 and the sensing cuff 73 to be constant. The fluid control unit 9 sets the flow resistance ratio according to the characteristics of the cuffs 71 and 73 of the blood pressure measuring device 1.

[0071] With the blood pressure measuring device 1 configured in this way, the flow channel plate unit 22, which is made of a metal material, can be used as GND by connecting the GND of the printed circuit board 231 with the flow channel plate unit 22 using the connecting member 25. The blood pressure measuring device 1 can implement static electricity countermeasures and noise countermeasures using the flow channel plate unit 22. Furthermore, since the flow channel plate unit 22 is a necessary component for the blood pressure measuring device 1 to perform its functions, by using the flow channel plate unit 22 for static electricity countermeasures, the blood pressure measuring device 1 does not need to provide any other parts for static electricity countermeasures other than the connecting member 25. For this reason, the blood pressure measuring device 1 can prevent an increase in the size of the device body 3 and an increase in manufacturing costs.

[0072] Furthermore, the connecting member 25 is configured to connect to at least one of the first flow channel plate 131 and the second flow channel plate 132, which are made of a metal material. Therefore, the connecting member 25 only needs to be connected to a part of either the first flow channel plate 131 or the second flow channel plate 132, providing a high degree of design freedom for connection positions and other factors.

[0073] Furthermore, since the housing 11 does not need to be used for static electricity countermeasures, the design flexibility of the housing 11 is improved, such as forming the housing 11 from a resin material or using the housing 11 as an electrode. If the housing 11 is made of a conductive material and is not used as an electrode, the housing 11 can also be used for static electricity countermeasures in addition to the flow channel plate unit 22.

[0074] As described above, according to the blood pressure measuring device 1 of this embodiment, by connecting the flow path plate unit 22 to the GND of the mounting substrate 23 with the connecting member 25, it is possible to suppress increases in size and cost and implement measures against static electricity.

[0075] It should be noted that the present invention is not limited to the embodiments described above. For example, in the above-described example, the connecting member 25 is connected to the first flow channel plate 131 of the flow channel plate unit 22, but the invention is not limited to this. For example, the connecting member 25 may be connected to the second flow channel plate 132 of the flow channel plate unit 22.

[0076] Furthermore, the connecting member 25 may be configured to be connected to both the first channel plate 131 and the second channel plate 132. Alternatively, for example, the adhesive member 133 may be formed from a material containing a conductive material, and the connecting member 25 may be connected to one of the first channel plate 131 and the second channel plate 132. By configuring both the first channel plate 131 and the second channel plate 132 to be connected to the connecting member 25, the volume of the channel plate unit 22 connected to the GND of the mounting substrate 23 (printed circuit board 231) increases, thereby enabling effective electrostatic discharge countermeasures.

[0077] Furthermore, the connecting member 25 may be configured to have multiple members. Also, for example, the pin 26 shown in Figure 3, which is used on the printed circuit board 231, may be used in addition to the connecting member 25, or replaced with the connecting member 25, to connect the GND of the printed circuit board 231 and the flow path plate unit 22.

[0078] Furthermore, although the above example described a configuration in which the connecting member 25 connects the flow path plate unit 22 and the GND of the printed circuit board 231, the configuration is not limited to this. As long as the connecting member 25 can directly or indirectly connect the flow path plate unit 22 and the GND of the printed circuit board 231, the detailed configuration can be set as appropriate. That is, the connecting member 25 may be configured to connect the flow path plate unit 22 and the GND of other components connected to the GND of the printed circuit board 231.

[0079] It should be noted that the present invention is not limited to the embodiments described above, and can be modified in various ways during implementation without departing from its essence. Furthermore, each embodiment may be combined as appropriate as possible, and in that case, the combined effects can be obtained. Moreover, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriate combinations of the multiple constituent elements disclosed. For example, if the problem can be solved and effects obtained even if some constituent elements are deleted from all the constituent elements shown in the embodiment, then the configuration with these constituent elements deleted can be extracted as an invention. [Explanation of symbols]

[0080] 1... Blood pressure measuring device, 3... Device body, 4... Belt, 5... Carl, 7... Cuff structure, 9... Fluid control unit, 11... Housing, 12... Display unit, 13... Operation unit, 14... Pump, 15... Acceleration sensor, 16... On / off valve, 17... Pressure sensor, 18... Battery, 19... Communication unit, 20... Memory, 21... Processor, 22... Flow channel plate unit, 22a... Flow channel section, 22c... First flow channel, 22c1... Branch flow channel, 22d... Second flow channel, 23... Mounting board, 24... Charging circuit, 25... Connecting member, 25a... Screw, 26... Pin, 31... Outer case, 31a... Lug, 31b... Spring bar, 32... Crystal, 35... Back cover, 41... Button, 43 ...touch panel, 61...first belt, 61c...buckle, 61d...frame-like body, 61e...rod, 62...second belt, 62a...small hole, 71...pressure cuff, 72...back plate, 73...sensing cuff, 81...air bag, 91...air bag, 92...flow channel body, 131...first flow channel plate, 131a...first hole, 131b...second hole, 131c...third hole, 132...second flow channel plate, 132a...flow channel plate body, 132b...nozzle, 132b1...first nozzle, 132b2...second nozzle, 133...adhesive member, 133a...notch, 231...printed circuit board, 232...spacer, 241...antenna part, 242...power receiving part, 243...charging part.

Claims

1. The casing and A flow channel plate unit housed within the aforementioned housing and at least a portion of which is made of a conductive material, A pump connected to the aforementioned flow path plate unit, A pressure sensor connected to the aforementioned flow path plate unit, A cuff connected to the flow path plate unit and fluidly connected to the pump and the pressure sensor via the flow path plate unit, A printed circuit board having GND is housed within the aforementioned enclosure, and electronic components mounted on the printed circuit board supply fluid to the cuff, the printed circuit board and At least one connecting member that electrically connects the GND of the printed circuit board and the portion of the flow channel plate unit formed of the conductive material, A blood pressure measuring device equipped with the following features.

2. The aforementioned flow channel plate unit is A first channel plate made of a metal material, A second flow channel plate made of a metal material, An adhesive member for bonding the first channel plate and the second channel plate, Equipped with, The blood pressure measuring device according to claim 1, wherein the connecting member is connected to at least one of the first flow channel plate and the second flow channel plate.

3. The blood pressure measuring device according to claim 2, wherein the adhesive member includes a conductive material.

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