Blood pressure measuring device

Abstract

The blood pressure measuring device (1) includes: a retaining ring (5) that bends in the circumferential direction of the wearing part of the living body; and a cuff having: a bag-shaped structure (81, 101) that is laminated in multiple layers and is long in one direction, and the bag-shaped structure (81, 101) is formed by welding two sheet members made of a resin material and expands due to fluid; and a joint portion provided at at least a part of the edge portion of the bag-shaped structure (81, 101) disposed opposite to the retaining ring (5), joined to the outer peripheral surface side of the retaining ring (5), and formed by a part of the sheet member constituting the bag-shaped structure (81, 101) disposed opposite to the retaining ring (5).

Description

Technical Field

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

[0002] In recent years, blood pressure measuring devices for measuring blood pressure have been used not only in medical facilities but also at home as a means of confirming the health status. For example, a blood pressure measuring device expands and contracts a cuff wound around the upper arm or wrist of a living body, and detects the pressure of the cuff by a pressure sensor, thereby detecting the vibration of the arterial wall to measure blood pressure.

[0003] As such a blood pressure measuring device, for example, there is known a so-called integrated blood pressure measuring device in which a cuff and a device body for supplying fluid to the cuff are integrated. Such a blood pressure measuring device has the following problems: when wrinkles, creases, etc. are generated in the cuff, the accuracy of the measured blood pressure measurement result decreases. In addition, the blood pressure measuring device requires the cuff to expand in the blood vessel closing direction and the cuff to closely adhere to the wrist.

[0004] Therefore, for example, as disclosed in Japanese Patent Application Laid-Open No. 2018-102743, in a blood pressure measuring device, there is known a technique of using a snap ring between a band and a cuff in order to make the expanded cuff closely adhere to the upper arm or wrist. Such a blood pressure measuring device integrates the cuff and the snap ring by joining the cuff to the snap ring with a bonding layer such as a double-sided tape.

[0005] Prior Art Documents

[0006] Patent Documents

[0007] Patent Document 1: Japanese Patent Application Laid-Open No. 2018-102743 Summary of the Invention

[0008] Problems to be Solved by the Invention

[0009] In the above blood pressure measuring device, when the cuff expands, the central side of the cuff expands more than the edge side. When the central side of the cuff expands more than the end side of the cuff, the stress applied to the bonding layer that joins the cuff to the snap ring is concentrated on the edge side of the cuff. Therefore, stress is generated in the bonding layer in such a way that the cuff peels off from the snap ring starting from the edge side of the cuff. Therefore, when the cuff expands and contracts repeatedly, the cuff may peel off from the snap ring. In particular, when the widths of the snap ring and the cuff are small, the area where the cuff and the snap ring are joined is small, so the cuff is more likely to peel off from the snap ring. Therefore, it is also considered to increase the widths of the cuff and the snap ring and increase the joining area, thereby improving the joining strength between the snap ring and the cuff.

[0010] However, for blood pressure measurement devices, wearable devices worn on the wrist are also considered, and further miniaturization is required. Therefore, a technique is required that can suppress the peeling of the cuff from the retaining ring without increasing the width of the cuff and the retaining ring.

[0011] Therefore, an object of the present invention is to provide a blood pressure measurement device that can suppress the peeling of the cuff from the retaining ring.

[0012] Technical solution

[0013] According to one aspect, there is provided a blood pressure measurement device including: a retaining ring that bends along the circumference of the wearing part of the living body; and a cuff having: a bag-shaped structure body that is stacked in a plurality and is long in one direction, and the bag-shaped structure body is formed by welding two sheet members made of a resin material and expands due to a fluid; and a joined portion that is provided at at least a part of the edge portion of the bag-shaped structure body disposed opposite to the retaining ring and is joined to the outer peripheral surface side of the retaining ring and is formed by a part of the sheet member constituting the bag-shaped structure body disposed opposite to the retaining ring.

[0014] Here, the fluid includes liquid and air. The cuff refers to a member that is wound around the upper arm, wrist, etc. of a living body during blood pressure measurement and expands due to the supply of a fluid, and includes a bag-shaped structure body such as an air bag.

[0015] According to this aspect, the joined portion provided at at least a part of the edge portion of the bag-shaped structure body disposed opposite to the retaining ring is joined to the outer peripheral surface side of the retaining ring. Therefore, even if the bag-shaped structure body deforms due to the expansion of the bag-shaped structure body, the deformation of the joined portion is suppressed. In addition, the stress generated between the joined portion and the outer peripheral surface of the retaining ring due to the expansion of the bag-shaped structure body becomes a shear stress. Therefore, the blood pressure measurement device can suppress the peeling of the retaining ring from the cuff when the bag-shaped structure body expands.

[0016] In the blood pressure measurement device according to the above aspect, there is provided a blood pressure measurement device, wherein the joined portion is provided at each edge portion in the short dimension direction of the bag-shaped structure body.

[0017] According to this aspect, the joined portion provided at the edge portion in the short dimension direction of the bag-shaped structure body disposed opposite to the retaining ring is joined to the outer peripheral surface side of the retaining ring. Therefore, the joining area can be ensured. As a result, the blood pressure measurement device can suppress the peeling of the retaining ring from the cuff when the bag-shaped structure body expands.

[0018] In the blood pressure measurement device according to the above aspect, there is provided a blood pressure measurement device further including: a joining layer provided between the joined portion and the retaining ring to join the joined portion and the retaining ring.

[0019] According to this solution, the joint between the joint target part and the snap ring is carried out through the joint layer. Thus, the joint between the snap ring and the cuff only needs to be set in the joint area between the snap ring and the cuff when assembling the joint layer, so the manufacturing becomes easy.

[0020] In the blood pressure measurement device of the above-mentioned solution, a blood pressure measurement device is provided, and the joint layer is also provided between the inner peripheral surface of the bag-shaped structure and the snap ring.

[0021] According to this solution, it is configured that the joint layer is also provided between the inner peripheral surface of the bag-shaped structure and the snap ring. Thus, the cuff is joined to both the inner peripheral surface side and the outer peripheral surface side of the snap ring, so the joint area can be ensured as much as possible. As a result, the joint strength between the cuff and the snap ring of the blood pressure measurement device can be improved.

[0022] In the blood pressure measurement device of the above-mentioned solution, a blood pressure measurement device is provided, and the joint layer is a double-sided adhesive tape.

[0023] According to this solution, the cuff and the snap ring can be joined by the double-sided adhesive tape, so the assemblability of the cuff and the snap ring can be improved.

[0024] In the blood pressure measurement device of the above-mentioned solution, a blood pressure measurement device is provided, and the joint target parts provided at the respective edge parts in the short dimension direction of the bag-shaped structure are laminated on the outer peripheral surface side of the snap ring and joined together.

[0025] According to this solution, the joint target parts are joined to each other, so that the joint target parts are integrally formed. Even when an external force is applied, the peeling of the joint target parts from the snap ring can be suppressed.

[0026] In the blood pressure measurement device of the above-mentioned solution, a blood pressure measurement device is provided, and the laminated joint target parts are joined by welding.

[0027] According to this solution, the laminated joint target parts are welded together, so the peeling of the joint target parts from each other can be prevented.

[0028] In the blood pressure measurement device of the above-mentioned solution, a blood pressure measurement device is provided, and the width in the short dimension direction of the bag-shaped structure is equal to or greater than the width in the short dimension direction of the snap ring.

[0029] According to this solution, the width in the short dimension direction of the bag-shaped structure is the same as or greater than that of the snap ring. Thus, the area that can pressurize the living body can be ensured as much as possible through the bag-shaped structure, so the blood pressure measurement accuracy can be improved.

[0030] In the blood pressure measurement device of the above-mentioned solution, a blood pressure measurement device is provided, and the part of the joint target part facing the outer peripheral surface of the snap ring is formed by one sheet member.

[0031] According to this solution, the portion of the joint part that is joined to the outer peripheral surface side of the snap ring is formed by a single sheet member. Therefore, when the snap ring and the cuff are integrated, an increase in the thickness of the snap ring and the cuff can be suppressed.

[0032] Advantages of the Invention

[0033] The present invention can provide a blood pressure measuring device that can suppress peeling between the snap ring and the cuff. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 FIG. is a perspective view showing the configuration of a blood pressure measuring device according to a first embodiment of the present invention.

[0035] Figure 2 FIG. is a perspective view showing the configuration of the blood pressure measuring device according to the first embodiment of the present invention in an exploded manner.

[0036] Figure 3 FIG. is a perspective view showing the configuration of a blood pressure measuring device according to a first embodiment of the present invention.

[0037] Figure 4 FIG. is an explanatory view showing a state in which the blood pressure measuring device according to the first embodiment of the present invention is worn on the wrist.

[0038] Figure 5 FIG. is a block diagram showing the configuration of a blood pressure measuring device according to a first embodiment of the present invention.

[0039] Figure 6 FIG. is a perspective view showing the configuration of the snap ring and cuff structure of the blood pressure measuring device according to the first embodiment of the present invention in an exploded manner.

[0040] Figure 7 FIG. is a cross-sectional view showing the configuration of the snap ring and cuff structure of the blood pressure measuring device according to a first embodiment of the present invention.

[0041] Figure 8 FIG. is a cross-sectional view showing the configuration of the snap ring and cuff structure of the blood pressure measuring device according to a first embodiment of the present invention.

[0042] Figure 9 FIG. is a cross-sectional view showing the configuration of the back cuff of the blood pressure measuring device according to a first embodiment of the present invention.

[0043] Figure 10 FIG. is a cross-sectional view showing the configuration of the back cuff of the blood pressure measuring device according to a first embodiment of the present invention.

[0044] Figure 11 FIG. is a perspective view showing the configuration of the snap ring of the blood pressure measuring device according to a first embodiment of the present invention.

[0045] Figure 12It is a top view showing the configuration of the cuff structure of the blood pressure measuring device according to the first embodiment of the present invention.

[0046] Figure 13 It is a top view showing the configuration of the cuff structure of the blood pressure measuring device according to the first embodiment of the present invention.

[0047] Figure 14 It is a top view showing the configuration of the palmar cuff of the blood pressure measuring device according to the first embodiment of the present invention.

[0048] Figure 15 It is a cross-sectional view showing the configuration of the palmar cuff of the blood pressure measuring device according to the first embodiment of the present invention.

[0049] Figure 16 It is a top view showing the configuration of the sensing cuff of the blood pressure measuring device according to the first embodiment of the present invention.

[0050] Figure 17 It is a cross-sectional view showing the configuration of the sensing cuff of the blood pressure measuring device according to the first embodiment of the present invention.

[0051] Figure 18 It is a flowchart showing an example of the use of the blood pressure measuring device according to the first embodiment of the present invention.

[0052] Figure 19 It is a perspective view showing an example of wearing the blood pressure measuring device according to the first embodiment of the present invention on the wrist.

[0053] Figure 20 It is a perspective view showing an example of wearing the blood pressure measuring device according to the first embodiment of the present invention on the wrist.

[0054] Figure 21 It is a perspective view showing an example of wearing the blood pressure measuring device according to the first embodiment of the present invention on the wrist.

[0055] Figure 22 It is a cross-sectional view schematically showing the state of wearing the blood pressure measuring device according to the first embodiment of the present invention on a living body.

[0056] Figure 23 It is an explanatory diagram showing a comparison of the stress applied to the cuff of the blood pressure measuring device according to the first embodiment of the present invention with a conventional example.

[0057] Figure 24 It is a cross-sectional view showing the configuration of other modified examples of the dorsal cuff and the palmar cuff of the blood pressure measuring device according to the first embodiment of the present invention.

[0058] Figure 25It is a cross-sectional view showing the configuration of another modified example of the dorsal cuff and the palmar cuff of the blood pressure measuring device according to the first embodiment of the present invention.

[0059] Figure 26 It is a cross-sectional view showing the configuration of another modified example of the dorsal cuff and the palmar cuff of the blood pressure measuring device according to the first embodiment of the present invention.

[0060] Figure 27 It is a cross-sectional view showing the configuration of another modified example of the dorsal cuff and the palmar cuff of the blood pressure measuring device according to the first embodiment of the present invention.

[0061] Figure 28 It is a cross-sectional view showing the configuration of another modified example of the dorsal cuff and the palmar cuff of the blood pressure measuring device according to the first embodiment of the present invention.

[0062] Figure 29 It is a perspective view showing the configuration of the blood pressure measuring device according to the second embodiment of the present invention.

[0063] Figure 30 It is a cross-sectional view showing the configuration of the blood pressure measuring device according to the second embodiment of the present invention. Detailed Embodiment

[0064] [First Embodiment]

[0065] Hereinafter, for an example of the blood pressure measuring device 1 according to the first embodiment of the present invention, the following Figures 1 to 17 is illustrated.

[0066] Figure 1 It is a perspective view showing the configuration of the blood pressure measuring device 1 according to the first embodiment of the present invention. Figure 2 It is a perspective view showing the configuration of the blood pressure measuring device 1 disassembled. Figure 3 It is a perspective view showing the configuration of the blood pressure measuring device 1. Figure 4 It is an explanatory view showing the state where the blood pressure measuring device 1 is worn on the wrist 200. Figure 5 It is a block diagram showing the configuration of the blood pressure measuring device 1. Figure 6 It is a perspective view showing the configuration of the snap ring 5 and the cuff structure 6 of the blood pressure measuring device 1 disassembled. Figure 7 It is a cross-sectional view showing the configuration of the snap ring 5 and the cuff structure 6 of the blood pressure measuring device 1. Figure 8 It is a cross-sectional view showing the configuration of the snap ring 5 and the cuff structure 6 of the blood pressure measuring device 1. Figure 9 It is a cross-sectional view showing the configuration of the dorsal cuff 74 of the blood pressure measuring device 1. Figure 10 It is a cross-sectional view showing the configuration of the dorsal cuff 74 of the blood pressure measuring device 1. Figure 11 It is a perspective view showing the configuration of the snap ring 5 of the blood pressure measuring device 1.Figure 12 This is a top view showing the structure of the cuff structure 6 of the blood pressure measuring device 1. Figure 13 This is a top view showing the structure of the cuff structure 6 as viewed from the inner peripheral surface side of the snap ring 5.

[0067] Figure 14 This is a top view showing the structure of the palmar cuff 71 of the blood pressure measuring device 1. Figure 15 It is Figure 14 A cross-sectional view showing the structure of the palmar cuff 71 taken along line XV-XV in Figure 16 This is a top view showing the structure of the sensing cuff 73 of the blood pressure measuring device 1. Figure 17 It is Figure 16 A cross-sectional view showing the structure of the sensing cuff 73 of the blood pressure measuring device 1 taken along line XVII-XVII in

[0068] The blood pressure measuring device 1 is an electronic blood pressure measuring device worn on a living body. In the present embodiment, an electronic blood pressure measuring device using a wearable device worn on the wrist 200 of a living body will be described.

[0069] As Figures 1 to 3 shown, the blood pressure measuring device 1 includes: a device main body 3; a band 4 for fixing the device main body 3 to the wrist; a snap ring 5 disposed between the band 4 and the wrist; a cuff structure 6 having a palmar cuff 71, a sensing cuff 73, and a dorsal cuff 74; a fluid circuit 7 fluidly connecting the device main body 3 and the cuff structure 6; and a power supply unit 8 disposed on the snap ring 5.

[0070] As Figures 1 to 5 shown, the device main body 3 includes, for example, a housing 11, a display unit 12, an operation unit 13, a pump 14, a flow path unit 15, an on-off valve 16, a pressure sensor 17, a power supply unit 18, a vibration motor 19, and a control board 20. The device main body 3 supplies fluid to the cuff structure 6 through the pump 14, the on-off valve 16, the pressure sensor 17, the control board 20, etc.

[0071] As Figures 1 to 3 shown, the housing 11 includes: a contour housing 31; a windshield 32 covering the upper opening of the contour housing 31; a base 33 provided below the interior of the contour housing 31; and a back cover 35 covering the lower part of the contour housing 31.

[0072] The contour housing 31 is formed in a cylindrical shape. The contour housing 31 includes a pair of ears 31a provided at symmetric positions in the circumferential direction on the outer peripheral surface and two spring rods 31b provided between the pair of ears 31a. The windshield 32 is, for example, a circular glass plate.

[0073] The base 33 holds the display unit 12, the operation unit 13, the pump 14, the on-off valve 16, the pressure sensor 17, the power supply unit 18, the vibration motor 19, and the control substrate 20. In addition, the base 33 constitutes, for example, a part of the flow path unit 15 that fluidly connects the pump 14 and the cuff structure 6.

[0074] The back cover 35 is configured as a ring that is open on the central side. The back cover 35 covers the outer peripheral edge side of the biological body side end of the contour housing 31. Such a back cover 35 is combined with the snap ring 5 as a single body, whereby the central opening is covered by the snap ring 5, and together with the snap ring 5, it constitutes a back cover that covers the biological body side end of the contour housing 31. The back cover 35 is fixed to the biological body side end of the contour housing 31 or the base 33, for example, by four small screws 35a or the like.

[0075] The display unit 12 is disposed on the base 33 of the contour housing 31 and immediately below the windshield 32. As Figure 5 shown, the display unit 12 is electrically connected to the control substrate 20. The display unit 12 is, for example, a liquid crystal display or an organic electroluminescence display. The display unit 12 displays various information including the date and time, blood pressure values such as the maximum blood pressure and the minimum blood pressure, and measurement results such as the heart rate.

[0076] The operation unit 13 is configured to be able to input instructions from the user. For example, as Figure 5 shown, the operation unit 13 includes: a plurality of buttons 41 provided on the housing 11; a sensor 42 that detects the operation of the buttons 41; and a touch panel 43 provided on the display unit 12 or the windshield 32. The operation unit 13 is operated by the user, thereby converting the instructions into electrical signals. The sensor 42 and the touch panel 43 are electrically connected to the control substrate 20 and output electrical signals to the control substrate 20.

[0077] The plurality of buttons 41 are provided, for example, in three. The buttons 41 are supported by the base 33 and project from the outer peripheral surface of the contour housing 31. The plurality of buttons 41 and the plurality of sensors 42 are supported by the base 33. The touch panel 43 is, for example, integrally provided with the windshield 32.

[0078] The pump 14 is, for example, a piezoelectric pump. The pump 14 compresses air and supplies the compressed air to the cuff structure 6 via the flow path unit 15. The pump 14 is electrically connected to the control substrate 20.

[0079] As Figure 5 shown, the flow path unit 15 constitutes a flow path that connects from the pump 14 to the palmar cuff 71 and the dorsal cuff 74 and a flow path that connects from the pump 14 to the sensing cuff 73. In addition, the flow path unit 15 constitutes a flow path that connects from the palmar cuff 71 and the dorsal cuff 74 to the atmosphere and a flow path that connects from the sensing cuff 73 to the atmosphere. The flow path unit 15 is an air flow path constituted by a hollow portion, a groove, a tube, etc. provided on the base 33 or the like.

[0080] The opening / closing valve 16 opens and closes a part of the flow path section 15. For example, as Figure 5 shown, a plurality of opening / closing valves 16 are provided, and the flow paths connecting the pump 14 to the palmar cuff 71 and the dorsal cuff 74, the flow path connecting the pump 14 to the sensing cuff 73, the flow paths connecting the palmar cuff 71 and the dorsal cuff 74 to the atmosphere, and the flow paths connecting the sensing cuff 73 to the atmosphere are selectively opened and closed by the opening / closing combination of each opening / closing valve 16. For example, two opening / closing valves 16 are used.

[0081] The pressure sensor 17 detects the pressures of the palmar cuff 71, the sensing cuff 73, and the dorsal cuff 74. The pressure sensor 17 is electrically connected to the control substrate 20. The pressure sensor 17 converts the detected pressure into an electrical signal and outputs it to the control substrate 20. For example, as Figure 5 shown, the pressure sensor 17 is provided in the flow paths connecting the pump 14 to the palmar cuff 71 and the dorsal cuff 74 and the flow path connecting the pump 14 to the sensing cuff 73. Since these flow paths are connected to the palmar cuff 71, the sensing cuff 73, and the dorsal cuff 74, the pressures in these flow paths become the pressures in the internal spaces of the palmar cuff 71, the sensing cuff 73, and the dorsal cuff 74.

[0082] The power supply unit 18 is, for example, a secondary battery such as a lithium-ion battery. As Figure 5 shown, the power supply unit 18 is electrically connected to the control substrate 20. The power supply unit 18 supplies power to the control substrate 20.

[0083] As Figure 5 shown, the control substrate 20 includes, for example, a substrate 51, an acceleration sensor 52, a communication unit 53, a storage unit 54, and a control unit 55. The control substrate 20 is formed by mounting the acceleration sensor 52, the communication unit 53, the storage unit 54, and the control unit 55 on the substrate 51.

[0084] The substrate 51 is fixed to the base portion 33 of the housing 11 by small screws or the like.

[0085] The acceleration sensor 52 is, for example, a three-axis acceleration sensor. The acceleration sensor 52 outputs an acceleration signal to the control unit 55, and this acceleration signal represents the accelerations in three mutually orthogonal directions of the device main body 3. For example, the acceleration sensor 52 is used to measure the activity amount of the living body wearing the blood pressure measuring device 1 based on the detected acceleration.

[0086] The communication unit 53 is configured to be able to transmit and receive information with an external device wirelessly or wiredly. The communication unit 53, for example, transmits information controlled by the control unit 55, measured blood pressure values, pulse, and other information to an external device via a network, and in addition, receives a program for software update and the like from an external device via a network and transmits it to the control unit.

[0087] In the present embodiment, the network is, for example, the Internet, but is not limited thereto, and may also be a network such as a LAN (Local Area Network) installed in a hospital, or may be direct communication with an external device using a cable having a terminal of a specified specification such as a USB. Therefore, the communication unit 53 may also be a structure including a plurality of wireless antennas and a micro USB connector.

[0088] The storage unit 54 stores in advance program data for controlling the entire blood pressure measurement device 1 and the fluid circuit 7, setting data for setting various functions of the blood pressure measurement device 1, and calculation data for calculating the blood pressure value and pulse based on the pressure measured by the pressure sensor 17. In addition, the storage unit 54 stores information such as the measured blood pressure value and pulse.

[0089] The control unit 55 is composed of one or more CPUs, and controls the overall operation of the blood pressure measurement device 1 and the operation of the fluid circuit 7. The control unit 55 is electrically connected to the display unit 12, the operation unit 13, the pump 14, the opening and closing valves 16, and the pressure sensors 17, and supplies power thereto. In addition, the control unit 55 controls the operation of the display unit 12, the pump 14, and the opening and closing valves 16 based on the electrical signals output by the operation unit 13 and the pressure sensor 17.

[0090] For example, Figure 5 As shown in FIG. 1 , the control unit 55 includes a main CPU (Central Processing Unit) 56 for controlling the overall operation of the blood pressure measurement device 1 and a sub-CPU 57 for controlling the operation of the fluid circuit 7. For example, the main CPU 56 obtains measurement results such as the maximum blood pressure and the minimum blood pressure, and the heart rate based on the electrical signal output by the pressure sensor 17, and outputs an image signal corresponding to the measurement result to the display unit 12.

[0091] For example, when an instruction to measure blood pressure is input from the operation unit 13, the sub-CPU 57 drives the pump 14 and the on-off valve 16 to deliver compressed air to the palm cuff 71 and the sensing cuff 73. In addition, the sub-CPU 57 controls the driving and stopping of the pump 14 and the opening and closing of the on-off valve 16 based on the electrical signal output by the pressure sensor 17. The sub-CPU 57 selectively delivers compressed air to the palm cuff 71 and the sensing cuff 73 by controlling the pump 14 and the on-off valve 16, and selectively decompresses the palm cuff 71 and the sensing cuff 73.

[0092] like Figures 1 to 4 As shown, the band 4 includes a first band 61 provided on one pair of ears 31a and the spring bar 31b, and a second band 62 provided on the other pair of ears 31a and the spring bar 31b. The band 4 is wrapped around the wrist 200 via a collar 5.

[0093] The first band 61 is a so-called master band and is configured as a strip that can be connected to the second band 62. As Figure 1 and Figure 2 shown, the first band 61 has a band portion 61a and a buckle 61b. The band portion 61a is configured as a strip. The band portion 61a is formed of a resin material that can be elastically deformed. In addition, the band portion 61a has flexibility and has a sheet-like insertion member inside that suppresses the expansion and contraction of the band portion 61a in the long dimension direction. The band portion 61a has: a first hole portion 61c formed at one end and orthogonal to the long dimension direction of the band portion 61a; and a second hole portion 61d formed at the other end and orthogonal to the long dimension direction of the first band 61.

[0094] As Figure 1 and Figure 2 shown, the first hole portion 61c is provided at the end of the band portion 61a. The first hole portion 61c has an inner diameter that can allow the spring rod 31b to be inserted and can allow the first band 61 to rotate relative to the spring rod 31b. That is, the first band 61 is located between a pair of ears 31a and the first hole portion 61c is disposed at the spring rod 31b, whereby it is rotatably held by the contour housing 31.

[0095] As Figure 1 and Figure 2 shown, the second hole portion 61d is provided at the end of the band portion 61a. The second hole portion 61d is fitted with the buckle 61b.

[0096] As Figure 1 and Figure 2 shown, the buckle 61b has a rectangular frame-shaped frame body 61e and a tongue 61f rotatably fitted to the frame body 61e. One side of the frame body 61e fitted with the tongue 61f is inserted into the second hole portion 61d and is fitted in a manner that can rotate relative to the band portion 61a.

[0097] The second band 62 is a so-called hook band and is configured as a strip having a width that can be inserted into the frame body 61e. The second band 62 is formed of a resin material that can be elastically deformed. In addition, the second band 62 has flexibility and has a sheet-like insertion member inside that suppresses the expansion and contraction of the second band 62 in the long dimension direction.

[0098] In addition, as Figures 1 to 3 shown, the second band 62 has a plurality of small holes 62a for inserting the tongue 61f. In addition, the second band 62 has a third hole portion 62b provided at one end and orthogonal to the long dimension direction of the second band 62. The third hole portion 62b has an inner diameter that can allow the spring rod 31b to be inserted and can allow the second band 62 to rotate relative to the spring rod 31b. That is, the second band 62 is located between a pair of ears 31a and the third hole portion 62b is disposed at the spring rod 31b, whereby it is rotatably held by the contour housing 31.

[0099] In such a band 4, the second band 62 is inserted into the frame body 61e, and the buckle tongue 61f is inserted into the small hole 62a, whereby the first band 61 and the second band 62 are connected integrally and, together with the contour housing 31, form a ring in accordance with the circumference of the wrist 200. The band 4 forms a ring in accordance with the circumference of the wrist 200, whereby the snap ring 5 is pressed, causing the snap ring 5 to elastically deform in a manner conforming to the circumference of the wrist of the wearer of the blood pressure measuring device 1.

[0100] As Figures 1 to 4 shown, the snap ring 5 is configured as a band that bends in accordance with the circumference of the wrist. The snap ring 5 is formed such that one end is separated from the other end. The outer surface of, for example, one end side of the snap ring 5 is fixed to the back cover 35 of the device main body 3. One end and the other end of the snap ring 5 are disposed at positions protruding from the back cover 35. In addition, one end and the other end of the snap ring 5 are adjacent to each other with a specified distance therebetween. The snap ring 5 is formed of, for example, a resin material. As a specific example, the snap ring 5 is formed of polypropylene to have a thickness of about 1 mm.

[0101] As a specific example, as Figure 4 shown, the snap ring 5 is configured as a band that bends in accordance with the circumference of the wrist, and has a disc-shaped cover portion 5a that, together with the back cover 35, forms the back cover at a position facing the back side of the wrist 200 on the end side. In the snap ring 5, for example, the cover portion 5a and the adjacent portions are formed in a flat plate shape, and are formed to bend with a specified curvature on one end side and the other end side as compared with the cover portion 5a.

[0102] In addition, as Figure 11 shown, the snap ring 5 is formed in a shape such that when one end approaches the other end, one end is located on the inner circumferential surface side of the other end. As a specific example, the width of the snap ring 5 in the width direction of the wrist 200 is set such that the back side of the wrist 200 of the snap ring 5 is larger than the palm side of the wrist 200 of the snap ring 5. Moreover, the snap ring 5 is set such that the radius of curvature of one end on the back side of the wrist 200 is larger than the radius of curvature of the other end on the palm side of the wrist 200. With such a configuration, for the snap ring 5, when the two end sides of the snap ring 5 abut, the other end is disposed inside the snap ring 5 as compared with one end.

[0103] The cover portion 5a has an insertion member for reinforcement. The cover portion 5a has a threaded hole 5b for assembling the back cover 35 using a small screw 35a or the like. In addition, the cover portion 5a has a hole portion 5c for connecting the cuff structure body 6 to the device main body 3. In the present embodiment, the hole portion 5c is formed to have a diameter into which connection portions 84, 93, and 103 of a palm-side cuff 71, a sensing cuff 73, and a back-side cuff 74, which will be described later, can be inserted, and three hole portions 5c are provided in the cover portion 5a. The cover portion 5a is fixed to the biological body side of the contour housing 31 with the back cover 35 being fixed therebetween.

[0104] Such a retaining ring 5 is fixed to the contour housing 31 in an orientation with one end and the other end facing the second belt 62 of the belt 4. In addition, in the retaining ring 5, at least the position facing the palm side of the wrist 200 is bent circumferentially along the palm side of the wrist 200, thereby holding the cuff structure 6 facing the palm side of the wrist 200 in a state of being bent according to the shape of the palm side of the wrist 200.

[0105] In addition, the retaining ring 5 has a hardness with flexibility and shape retention. Here, flexibility means that when an external force of the belt 4 is applied to the retaining ring 5, the shape is deformed in the radial direction. For example, flexibility means that when the retaining ring 5 is pressed by the belt 4, the shape deforms in a way that approaches the wrist, follows the shape of the wrist, or conforms to the shape of the wrist when viewed from the side. In addition, shape retention means that when no external force is applied, the retaining ring 5 can maintain the pre-shaped shape. For example, in the present embodiment, shape retention means that the shape of the retaining ring 5 can maintain the shape bent along the circumference of the wrist.

[0106] The retaining ring 5 has a cuff structure 6 disposed on its inner peripheral surface, and the cuff structure 6 is held along the shape of the inner peripheral surface of the retaining ring 5. As a specific example, the retaining ring 5 has a palm-side cuff 71 and a dorsal-side cuff 74 disposed on its inner peripheral surface, and the cuff structure 6 is fixed by a bonding layer 75 provided between the retaining ring 5, the palm-side cuff 71, and the dorsal-side cuff 74. In the present embodiment, the bonding layer 75 is an adhesive or a double-sided tape.

[0107] The retaining ring 5 is formed of a resin material. The thickness of the retaining ring 5 is formed of, for example, polypropylene to be about 1 mm thick.

[0108] As Figures 1 to 6 , Figure 12 and Figure 13 shown, the cuff structure 6 includes a palm-side cuff (cuff) 71, a back plate 72, a sensing cuff 73, and a dorsal-side cuff (cuff) 74. In addition, the cuff structure 6 includes a bonding layer 75 that joins each component to each other and joins the retaining ring 5 to the cuffs 71, 74. The cuff structure 6 is fixed to the retaining ring 5. The palm-side cuff 71, the back plate 72, and the sensing cuff 73 of the cuff structure 6 are stacked and disposed on the retaining ring 5, and the dorsal-side cuff 74 is disposed on the retaining ring 5 separately from the palm-side cuff 71, the back plate 72, and the sensing cuff 73.

[0109] As a specific example, as Figure 4 shown, in the cuff structure 6, starting from the inner peripheral surface of the retaining ring 5 and facing the living body side, the palm-side cuff 71, the back plate 72, and the sensing cuff 73 are stacked in this order and fixed to the inner peripheral surface of the palm side of the wrist 200 of the retaining ring 5. In addition, the dorsal-side cuff 74 of the cuff structure 6 is disposed on the inner peripheral surface of the dorsal side of the wrist 200 of the retaining ring 5. Each component of the cuff structure 6 is fixed to the component adjacent in the stacking direction by the bonding layer 75.

[0110] The palmar cuff 71 is a so-called pressing cuff. The palmar cuff 71 is fluidly connected to the pump 14 via the flow path portion 15. The palmar cuff 71 presses the back plate 72 and the sensing cuff 73 against the living body side by expansion. As Figures 6 to 8 , Figures 12 to 15 shown, the palmar cuff 71 includes: a plurality of air bags 81, for example, double-layer air bags 81; a joint portion 82 provided on the air bag 81 facing the snap ring 5; a tube 83 communicating with the air bag 81; and a connecting portion 84 provided at the end of the tube 83. Such a palmar cuff 71 is formed by welding a plurality of sheet members 86 together.

[0111] Here, the air bag 81 refers to a bag-shaped structure. In this embodiment, the blood pressure measuring device 1 is configured to use air by the pump 14, so the air bag is used for explanation. However, in the case of using a fluid other than air, the bag-shaped structure may also be a fluid bag such as a liquid bag. The plurality of air bags 81 are stacked and fluidly connected in the stacking direction.

[0112] The air bag 81 is formed in a rectangular bag shape that is long in one direction. In addition, the width of the air bag 81 in the short dimension direction is set to the same width as the width of the snap ring 5 in the short dimension direction. The air bag 81 is formed, for example, by combining two sheet members 86, as Figure 7 and Figure 8 , Figures 12 to 15 shown, and welded into a rectangular frame shape that is long in one direction by heat, like the welded portion 81a. In addition, the double-layer air bag 81 is formed by combining two air bags 81 by welding them together with heat, or by welding the opposing sheet members 86 of adjacent air bags 81 to each other and then welding to form the air bag 81. The double-layer air bag 81 is fluidly continuous through openings provided in the opposing sheet members 86.

[0113] One or more joint portions 82 are provided at least in a part of the edge portion of the air bag 81 adjacently disposed to the snap ring 5. The joint portion 82 is formed by a part of the sheet member 86 constituting the air bag 81.

[0114] In this embodiment, as Figures 6 to 8 , Figures 12 to 15 shown, an example in which one joint portion 82 is provided at each edge portion of the air bag 81 in the short dimension direction is used for explanation. It should be noted that, for example, the joint portion 82 may be divided by a slit in the long dimension direction of the air bag 81, and in addition, a plurality of joint portions 82 may be provided in the long dimension direction of the air bag 81. When the palmar cuff 71 is disposed on the inner peripheral surface of the snap ring 5, the joint portion 82 is at least joined to the outer peripheral surface of the snap ring 5. In addition, for example, two joint portions 82 are stacked and welded.

[0115] It should be noted that the two joined portions 82 are set to have different lengths in the short dimension direction of the airbag 81, for example. In this example, the two joined portions 82 are stacked and welded on one end side in the short dimension direction of the snap ring 5. It should be noted that the lengths of the two joined portions 82 can be appropriately set as long as their ends can be arranged on the outer peripheral surface of the snap ring 5, and they can be stacked or not stacked. However, when the lengths are set to be stackable, it is preferable that the ends do not extend beyond the outer edge of the outer peripheral surface of the snap ring 5.

[0116] As Figure 6 , Figures 12 to 15 shown, the tube 83 is integrally formed with one airbag 81, for example, with a part of one edge portion in the long dimension direction of the airbag 81 adjacent to the snap ring 5. As a specific example, the tube 83 is provided at the end of the airbag 81 close to the device main body 3. In addition, the tube 83 is formed to have a width smaller than the width in the short dimension direction of the airbag 81 and a shape that is longer in one direction, and the end is formed in a circular shape. The tube 83 has a connection portion 84 at the end. The tube 83 is connected to the flow path portion 15 via the connection portion 84 to form a flow path between the device main body 3 and the airbag 81.

[0117] The tube 83 is formed by welding a part of the sheet member 86 adjacent to the region of the sheet member 86 that forms the airbag 81 into a frame shape that is long in one direction in a state where the connection portion 84 is arranged between two sheet members 86.

[0118] It should be noted that in the airbag 81 provided with the tube 83, a part of the welding portion 81a that welds the two sheet members 86 into a rectangular frame shape is not welded, and is formed as a structure continuous with the welding portion 83a that forms the tube 83, thereby making the airbag 81 and the tube 83 fluidly continuous.

[0119] The connection portion 84 is, for example, a pipe joint. The connection portion 84 is provided at the end of the tube 83. The end of the connection portion 84 protrudes from the sheet member 86 of the two sheet members 86 that forms the tube 83 and faces the snap ring 5.

[0120] As a specific example, as Figure 7 and Figure 8 shown, the palmar cuff 71 includes, from the biological body side: a first sheet member 86a; a second sheet member 86b that forms the first layer of the airbag 81 with the first sheet member 86a; a third sheet member 86c that is joined to the second sheet member 86b integrally and forms the joined portion 82; and a fourth sheet member 86d that forms the second layer of the airbag 81 and the tube 83 with the third sheet member 86c. It should be noted that the palmar cuff 71 is formed integrally by joining adjacent sheet members 86 by welding achieved by heat.

[0121] The first sheet member 86a and the second sheet member 86b are formed into a rectangular shape similar to the air bag 81, and the air bag 81 is formed by welding the peripheral edge portions of the four sides. The second sheet member 86b and the third sheet member 86c are arranged opposite to each other, and each has a plurality of openings 86b1 and 86c1 that allow the fluid of the two air bags 81 to be continuous. In addition, the peripheries of the plurality of openings 86b1 and 86c1 are welded by heat into a rectangular frame shape that is smaller than the four sides of the air bag 81 welded, thereby the second sheet member 86b and the third sheet member 86c are joined together.

[0122] The third sheet member 86c is configured to have, for example, a shape that can constitute the air bag 81, the joined portion 82, and the tube 83. The fourth sheet member 86d is configured to have, for example, a shape that can constitute the air bag 81 and the tube 83. The fourth sheet member 86d has, for example, a hole 86d1 into which the distal end of the connecting portion 84 can be inserted.

[0123] The third sheet member 86c and the fourth sheet member 86d are arranged opposite to each other so that the air bag 81 and the tube 83 are fluidically connected. They are welded by heat along the peripheral shape of the air bag 81 and the tube 83 and cut into a specified shape, thereby forming the air bag 81, the joined portion 82 and the tube 83.

[0124] In the fourth sheet member 86d, the connecting portion 84 is arranged in the hole 86d1, and the periphery of the hole 86d1 is thermally welded to the connecting portion 84. The fourth sheet member 86d is bonded to the inner peripheral surface of the collar 5 via the bonding layer 75, and the bonded portion 82 of the third sheet member 86c is bonded to the outer peripheral surface of the collar 5 via the bonding layer 75.

[0125] like Figure 7 and Figure 8 As shown, the back plate 72 is attached to the outer surface of the first sheet member 86a of the palm cuff 71 through the bonding layer 75. The back plate 72 is formed into a plate shape by a resin material. The back plate 72 is made of polypropylene, for example, and is formed into a plate shape with a thickness of about 1 mm. The back plate 72 has shape-following properties.

[0126] Here, shape conformity refers to the function of the back plate 72 being able to deform in a manner consistent with the shape of the contacted portion of the wrist 200 on which it is configured. The contacted portion of the wrist 200 refers to the area of ​​the wrist 200 opposite to the back plate 72. The contact here includes both direct contact and indirect contact via the sensing cuff 73.

[0127] For example, Figure 8 As shown, the back plate 72 has a plurality of grooves 72a extending in a direction perpendicular to the longitudinal direction on both main surfaces of the back plate 72. Figure 8As shown, a plurality of grooves 72a are provided on both main surfaces of the back plate 72. The plurality of grooves 72a provided on both main surfaces are opposed to each other in the thickness direction of the back plate 72. In addition, the plurality of grooves 72a are arranged at equal intervals in the longitudinal direction of the back plate 72.

[0128] In the back plate 72, the portion having the plurality of grooves 72a is thinner than the portion without the grooves 72a, so that the portion having the plurality of grooves 72a is easily deformed, and thus the back plate 72 has shape-adaptability that deforms in accordance with the shape of the wrist 200 and extends in the circumferential direction of the wrist. The back plate 72 is formed to have a length that covers the palm side of the wrist 200. The back plate 72 transmits the pressing force from the palm cuff 71 to the main surface of the back plate 72 side of the sensing cuff 73 while following the shape of the wrist 200.

[0129] The sensing cuff 73 is fluidically connected to the pump 14 via the flow path 15. The sensing cuff 73 is fixed to the main surface of the back plate 72 on the biological body side. Figure 4 and Figure 22 As shown, the sensing cuff 73 is in direct contact with the region where the artery 210 of the wrist 200 is located. Here, the artery 210 refers to the radial artery and the ulnar artery. The sensing cuff 73 is formed to have the same shape as the back plate 72 or a shape smaller than the back plate 72 in the long dimension direction and the width direction of the back plate 72. The sensing cuff 73 compresses the region where the artery 210 is located on the palm side of the wrist 200 by expanding. The sensing cuff 73 is pressed toward the biological body side through the back plate 72 by the expanded palm side cuff 71.

[0130] As a specific example, Figure 7 , Figure 8 , Figure 16 as well as Figure 17 As shown, the sensing cuff 73 includes an air bag 91, a tube 92 connected to the air bag 91, and a connecting portion 93 provided at the end of the tube 92. In the sensing cuff 73, one main surface of the air bag 91 is fixed to the back plate 72. For example, the sensing cuff 73 is joined to the main surface of the back plate 72 on the biological body side through a joining layer 75. Such a sensing cuff 73 is formed by welding two sheet members 96 into one body.

[0131] Here, the air bag 91 refers to a bag-like structure. In the present embodiment, the blood pressure measurement device 1 uses air via the pump 14, so an air bag is used for description. However, when a fluid other than air is used, the bag-like structure may be a liquid bag or the like.

[0132] The air bag 91 is formed into a rectangular shape that is long in one direction. The air bag 91 is formed by combining two sheet members 96 that are long in one direction, for example. Figure 7 , Figure 8 , Figure 12 ,Figure 13 , Figure 16 and Figure 17 like the welded portion 91a shown, it is formed by welding with heat into a rectangular frame shape that is long in one direction.

[0133] One part of the edge portion on one side in the long dimension direction of the tube 92 and the airbag 91 is provided integrally. As a specific example, the tube 92 is provided at the end of the airbag 91 close to the device main body 3. In addition, the tube 92 is formed with a width smaller than the width in the short dimension direction of the airbag 91 and has a long shape in one direction, and the end is formed in a circular shape. The tube 92 has a connection portion 93 at the end. The tube 92 is connected to the flow path portion 15 via the connection portion 93 to constitute a flow path between the device main body 3 and the airbag 91.

[0134] The tube 92 is formed by welding a part of the sheet member 96 adjacent to the region of the sheet member 96 that constitutes the airbag 91 into a frame shape that is long in one direction in a state where the connection portion 93 is arranged between two sheet members 96. It should be noted that in the airbag 91, a part of the welded portion 91a that welds the two sheet members 96 into a rectangular frame shape is not welded, and it is configured to be continuous with the welded portion 92a that constitutes the tube 92, thereby making the airbag 91 and the tube 92 fluidly continuous.

[0135] The connection portion 93 is, for example, a pipe joint. The connection portion 93 is provided at the end of the tube 92. The end of the connection portion 93 protrudes from the sheet member 96 that faces the snap ring 5 and the back plate 72 among the two sheet members 96 that constitute the tube 92.

[0136] As a specific example, as Figure 7 and Figure 8 shown, the sensing cuff 73 includes a fifth sheet member 96a and a sixth sheet member 96b starting from the biological body side. It should be noted that the sensing cuff 73 is formed by joining adjacent sheet members 96 through welding achieved by heat.

[0137] For example, the fifth sheet member 96a and the sixth sheet member 96b are configured to be able to form the shape of the airbag 91 and the tube 92. The fifth sheet member 96a and the sixth sheet member 96b are arranged opposite to each other, and in a manner that makes the airbag 91 and the tube 92 fluidly continuous, they are welded along the peripheral shape of the airbag 91 and the tube 92 with heat and cut into a specified shape, thereby constituting the airbag 91 and the tube 92.

[0138] In addition, the sixth sheet member 96b, for example, has a hole portion 96b1 into which the end of the connection portion 93 can be inserted. In the sixth sheet member 96b, the connection portion 93 is arranged in the hole portion 96b1, and the periphery of the hole portion 96b1 is welded to the connection portion 93 with heat. The sixth sheet member 96b is joined to the inner peripheral surface of the back plate 72 via the bonding layer 75.

[0139] The dorsal cuff 74 is a so-called stretch cuff. The dorsal cuff 74 is fluidly connected to the pump 14 via the flow path portion 15. The dorsal cuff 74 presses the snap ring 5 in such a manner as to be separated from the wrist 200 by inflation, thereby stretching the band 4 and the snap ring 5 toward the dorsal side of the wrist 200. The dorsal cuff 74 includes: a plurality of air bags 101, for example, six-layer air bags 101; a bonded portion 102 provided on the air bag 101 facing the snap ring 5; and a connecting portion 103 provided on the air bag 101 facing the snap ring 5. Such a dorsal cuff 74 is formed by welding a plurality of sheet members 106 together as one body.

[0140] In addition, the dorsal cuff 74 is configured such that the thickness when inflated in the inflation direction, which is the direction in which the snap ring 5 faces the wrist 200 in the present embodiment, is thicker than the thickness when the ventral cuff 71 is inflated in the inflation direction and the thickness when the sensing cuff 73 is inflated in the inflation direction. That is, the air bag 101 of the dorsal cuff 74 has a layer structure more than that of the air bag 81 of the ventral cuff 71 and the air bag 91 of the sensing cuff 73, and the thickness when inflated from the snap ring 5 toward the wrist 200 is thicker than that of the ventral cuff 71 and the sensing cuff 73.

[0141] Here, the air bag 101 refers to a bag-shaped structure. In the present embodiment, the blood pressure measuring device 1 is configured to use air by the pump 14, so the air bag is used for explanation. However, in the case of using a fluid other than air, the bag-shaped structure may also be a fluid bag such as a liquid bag. A plurality of air bags 101 are stacked and fluidly communicated in the stacking direction.

[0142] The air bag 101 is formed in a rectangular bag shape that is long in one direction. In addition, the width in the short dimension direction of the air bag 101 is set to the same width as the width in the short dimension direction of the snap ring 5. The air bag 101 is formed, for example, by combining two sheet members 106, and is welded by heat into a rectangular frame shape that is long in one direction, such as the welded portion 101a shown in Figure 9 , Figure 10 , Figure 12 and Figure 13 . In addition, the six-layer air bag 101 is formed by combining six air bags 101 together by welding with heat, or by welding and forming the air bag 101 after welding the opposing sheet members 106 of adjacent air bags 101 to each other. The six-layer air bag 101 is fluidly continuous through the openings provided in the opposing sheet members 106.

[0143] One or more bonded portions 102 are provided on at least a part of the edge portion of the air bag 101 adjacently disposed to the snap ring 5. The bonded portion 102 is formed by a part of the sheet member 106 constituting the air bag 101.

[0144] In the present embodiment, an example will be described in which two joint portions 102 are provided in the longitudinal dimension of the airbag 101 at each edge portion in the short dimension of the airbag 101. It should be noted that, for example, the joint portion 102 is provided on the airbag 101 so as to avoid the position facing the cover portion 5a of the snap ring 5. Further, for example, the joint portion 102 has an avoidance portion 102a for exposing the power supply terminal 8b to the outside at a portion facing the power supply portion 8 provided on the snap ring 5, which will be described later. The avoidance portion 102a is, for example, an opening that can expose the power supply terminal 8b to the outside, and is circular as an example.

[0145] When the dorsal cuff 74 is disposed on the inner circumferential surface of the snap ring 5, the joint portion 102 is joined to at least the outer circumferential surface of the snap ring 5. Further, the joint portions 102 disposed at the same position in the short dimension of the airbag 101 are stacked and welded.

[0146] It should be noted that the two joint portions 102 are, for example, set to have different lengths in the short dimension of the airbag 101. In this example, the two joint portions 102 are stacked and welded on one end side in the short dimension of the snap ring 5. It should be noted that the lengths of the two joint portions 102 can be appropriately set as long as the ends can be disposed on the outer circumferential surface of the snap ring 5, and they may or may not be stacked. However, in the case where the lengths are set to be stackable, it is preferable that the ends do not extend beyond the outer edge of the outer circumferential surface of the snap ring 5.

[0147] The connection portion 103 is, for example, a pipe joint. The connection portion 103 is provided on the central side in the longitudinal dimension of the airbag 101 adjacent to the snap ring 5. The end of the connection portion 103 protrudes from the sheet member 106 of the two sheet members 106 constituting the airbag 101 that faces the snap ring 5.

[0148] As a specific example, as Figure 9 and Figure 10 shown, the dorsal cuff 74 includes a seventh sheet member 106a, an eighth sheet member 106b, a ninth sheet member 106c, a tenth sheet member 106d, an eleventh sheet member 106e, a twelfth sheet member 106f, a thirteenth sheet member 106g, a fourteenth sheet member 106h, a fifteenth sheet member 106i, a sixteenth sheet member 106j, a seventeenth sheet member 106k, and an eighteenth sheet member 106l starting from the biological body side. It should be noted that the dorsal cuff 74 is formed integrally by joining adjacent sheet members 106 by welding achieved by heat.

[0149] The seventh sheet member 106a to the eighteenth sheet member 106l are configured to be the same rectangle as the airbag 101. The seventh sheet member 106a and the eighth sheet member 106b form the first layer of the airbag 101 by welding the peripheral portions of the four sides. The eighth sheet member 106b and the ninth sheet member 106c are arranged opposite to each other and each have a plurality of openings 106b1, 106c1 that make the two airbags 101 fluidly continuous. In addition, the peripheries of the plurality of openings 106b1, 106c1 are welded by heat into a four-sided frame shape smaller than the four sides where the airbag 101 is welded, whereby the eighth sheet member 106b and the ninth sheet member 106c are joined together as one body.

[0150] The ninth sheet member 106c and the tenth sheet member 106d form the second layer of the airbag 101 by welding the peripheral portions of the four sides.

[0151] As Figure 9 and Figure 10 shown, the tenth sheet member 106d and the eleventh sheet member 106e are arranged opposite to each other and each have a plurality of openings 106d1, 106e1 that make the two airbags 101 fluidly connected. In addition, the peripheries of the plurality of openings 106d1, 106e1 are welded by heat into a four-sided frame shape smaller than the four sides where the airbag 101 is welded, whereby the tenth sheet member 106d and the eleventh sheet member 106e are joined together as one body. The eleventh sheet member 106e and the twelfth sheet member 106f form the third layer of the airbag 101 by welding the peripheral portions of the four sides.

[0152] As Figure 9 and Figure 10 shown, the twelfth sheet member 106f and the thirteenth sheet member 106g are arranged opposite to each other and each have a plurality of openings 106f1, 106g1 that make the two airbags 101 fluidly connected. In addition, the peripheries of the plurality of openings 106f1, 106g1 are welded by heat into a four-sided frame shape smaller than the four sides where the airbag 101 is welded, whereby the twelfth sheet member 106f and the thirteenth sheet member 106g are joined together as one body. The thirteenth sheet member 106g and the fourteenth sheet member 106h form the fourth layer of the airbag 101 by welding the peripheral portions of the four sides.

[0153] As Figure 9 and Figure 10As shown, the fourteenth sheet member 106h and the fifteenth sheet member 106i are disposed opposite to each other, and each has a plurality of openings 106h1, 106i1 that fluidly connect the two airbags 101. In addition, the peripheries of the plurality of openings 106h1, 106i1 are welded by heat into a four-sided frame shape smaller than the four sides of the welded airbag 101, whereby the fourteenth sheet member 106h and the fifteenth sheet member 106i are joined together. The fifteenth sheet member 106i and the sixteenth sheet member 106j form the fifth-layer airbag 101 by welding the peripheral portions of the four sides.

[0154] As Figure 9 and Figure 10 shown, the sixteenth sheet member 106j and the seventeenth sheet member 106k are disposed opposite to each other, and each has a plurality of openings 106j1, 106k1 that fluidly connect the two airbags 101. In addition, the seventeenth sheet member 106k is configured, for example, to form the shape of the airbag 101 and the joined portion 102. In addition, the peripheries of the plurality of openings 106j1, 106k1 are welded by heat into a four-sided frame shape smaller than the four sides of the welded airbag 101, whereby the sixteenth sheet member 106j and the seventeenth sheet member 106k are joined together. The seventeenth sheet member 106k and the eighteenth sheet member 106l are welded by heat along the peripheral shape of the airbag 101 and cut into a prescribed shape, whereby the sixth-layer airbag 101 and the joined portion 102 are formed.

[0155] In addition, the eighteenth sheet member 106l has, for example, a hole portion 106l1 into which the end of the connecting portion 103 can be inserted. In the eighteenth sheet member 106l, the connecting portion 103 is disposed in the hole portion 106l1, and the periphery of the hole portion 106l1 and the connecting portion 103 are welded by heat. In addition, the eighteenth sheet member 106l is joined to the inner peripheral surface of the snap ring 5 via the joining layer 75, and the seventeenth sheet member 106k is joined to the outer peripheral surface of the snap ring 5 via the joining layer 75.

[0156] In addition, the sheet members 86, 96, and 106 forming the palmar cuff 71, the sensing cuff 73, and the dorsal cuff 74 are formed of a thermoplastic resin material. The thermoplastic resin material is a thermoplastic elastomer. As the thermoplastic resin material constituting the sheet members 86, 96, and 106, for example, thermoplastic polyurethane resin (hereinafter referred to as TPU), polyvinyl chloride resin, ethylene-vinyl acetate resin, thermoplastic polystyrene resin, thermoplastic polyolefin resin, thermoplastic polyester resin, and thermoplastic polyamide resin can be used. It should be noted that in the palmar cuff 71 and the sensing cuff 73, at least the sheet members 86, 106 of the plurality of sheet members 86, 106 constituting the air bags 81, 101 that are at least welded to the snap ring 5 are made of the same material as the snap ring 5.

[0157] For example, the sheet members 86, 96, and 106 are formed by molding methods such as T-die extrusion molding and injection molding. After the sheet members 86, 96, and 106 are formed by each molding method, they are sized into a specified shape, and then the sized single sheets are joined by welding or the like to form the bag-like structures 81, 91, and 101. As the welding method, high-frequency welding and laser welding are used.

[0158] The fluid circuit 7 is composed of a housing 11, a pump 14, a flow path portion 15, an on-off valve 16, a pressure sensor 17, a palmar cuff 71, a sensing cuff 73, and a dorsal cuff 74. The two on-off valves 16 used in the fluid circuit 7 are taken as a first on-off valve 16A and a second on-off valve 16B, and the two pressure sensors 17 are taken as a first pressure sensor 17A and a second pressure sensor 17B. Hereinafter, a specific example of the fluid circuit 7 will be described.

[0159] As Figure 5 shown, the fluid circuit 7 includes, for example: a first flow path 7a connecting the palmar cuff 71 and the dorsal cuff 74 from the pump 14; a second flow path 7b formed by branching from an intermediate portion of the first flow path 7a and connecting the sensing cuff 73 from the pump 14; and a third flow path 7c connecting the first flow path 7a to the atmosphere. In addition, the first flow path 7a includes the first pressure sensor 17A. A first on-off valve 16A is provided between the first flow path 7a and the second flow path 7b. The second flow path 7b includes the second pressure sensor 17B. A second on-off valve 16B is provided between the first flow path 7a and the third flow path 7c.

[0160] In such a fluid circuit 7, the first on-off valve 16A and the second on-off valve 16B are closed. Thus, only the first flow path 7a is connected to the pump 14, and the pump 14, the palmar cuff 71, and the dorsal cuff 74 are fluidly connected. In the fluid circuit 7, the first on-off valve 16A is open and the second on-off valve 16B is closed. Thus, the first flow path 7a is connected to the second flow path 7b, the pump 14, the palmar cuff 71, and the dorsal cuff 74 are fluidly connected, and the pump 14 is fluidly connected to the sensing cuff 73. In the fluid circuit 7, the first on-off valve 16A is closed and the second on-off valve 16B is open. Thus, the first flow path 7a and the third flow path 7c are connected, and the palmar cuff 71, the dorsal cuff 74, and the atmosphere are fluidly connected. In the fluid circuit 7, the first on-off valve 16A and the second on-off valve 16B are open. Thus, the first flow path 7a, the second flow path 7b, and the third flow path 7c are connected, and the palmar cuff 71, the sensing cuff 73, the dorsal cuff 74, and the atmosphere are fluidly connected.

[0161] As Figure 5 shown, the power supply unit 8 is provided in the recess provided on the outer surface of one end side of the collar 5 protruding from the device main body 3. Further, it is provided adjacent to the outer surface of the cover portion 5a of the collar 5 on the short side. For example, the power supply unit 8 is inserted when the collar 5 is molded. As Figure 6 shown, the power supply unit 8 is configured to be connectable to a connector provided at the end of a charging cable of a charger and to be able to fix the connector.

[0162] The power supply unit 8 includes: a wiring portion 8a; a power supply terminal 8b; and a cover 8c that covers the wiring portion 8a disposed in the recess of the collar 5. One end of the wiring portion 8a is connected to the power supply terminal 8b, and the other end is connected to the control portion 55. The power supply terminal 8b is composed of, for example, two circular terminals.

[0163] Next, Figures 18 to 21 An example of measuring the blood pressure value using the blood pressure measuring device 1 will be described. Figure 18 is a flowchart showing an example of blood pressure measurement using the blood pressure measuring device 1, showing both the actions of the user and the control portion 55. In addition, Figures 19 to 21 shows an example of the user wearing the blood pressure measuring device 1 on the wrist 200.

[0164] First, the user wears the blood pressure measuring device 1 on the wrist 200 (step ST1). As a specific example, for example, as Figure 19 shown, the user inserts one side of the wrist 200 into the collar 5.

[0165] At this time, in the blood pressure measuring device 1, the device main body 3 and the sensing cuff 73 are arranged at opposite positions of the snap ring 5, so the sensing cuff 73 is arranged in the area where the artery 210 on the palm side of the wrist 200 is located. Thus, the device main body 3 and the dorsal cuff 74 are arranged on the back side of the wrist 200. Next, as Figure 20 shown, the user passes the second band 62 through the frame body 61e of the buckle 61b of the first band 61 with the hand opposite to the hand wearing the blood pressure measuring device 1. Next, the user stretches the second band 62 to make the cuff structure body 6 on the inner peripheral surface side of the snap ring 5 closely adhere to the wrist 200, and inserts the tongue 61f into the small hole 62a. Thus, as Figure 4 and Figure 21 shown, the first band 61 is connected to the second band 62, and the blood pressure measuring device 1 is worn on the wrist 200.

[0166] Next, the user operates the operation unit 13 to input a command corresponding to the start of the blood pressure measurement. The operation unit 13 that has received the command input operation outputs an electric signal corresponding to the start of the measurement to the control unit 55 (step ST2). When the control unit 55 receives this electric signal, for example, it opens the first on-off valve 16A, closes the second on-off valve 16B, drives the pump 14, and supplies compressed air to the palm cuff 71, the sensing cuff 73, and the dorsal cuff 74 via the first flow path 7a and the second flow path 7b (step ST3). Thus, the palm cuff 71, the sensing cuff 73, and the dorsal cuff 74 start to expand.

[0167] The first pressure sensor 17A and the second pressure sensor 17B respectively detect the pressures of the palm cuff 71, the sensing cuff 73, and the dorsal cuff 74, and output electric signals corresponding to the pressures to the control unit 55 (step ST4). The control unit 55 determines whether the pressures in the internal spaces of the palm cuff 71, the sensing cuff 73, and the dorsal cuff 74 have reached a specified pressure for blood pressure measurement based on the received electric signals (step ST5). For example, when the internal pressures of the palm cuff 71 and the dorsal cuff 74 have not reached the specified pressure and the internal pressure of the sensing cuff 73 has reached the specified pressure, the control unit 55 closes the first on-off valve 16A and supplies compressed air via the first flow path 7a.

[0168] When the internal pressures of the palm cuff 71 and the dorsal cuff 74 and the internal pressure of the sensing cuff 73 have all reached the specified pressure, the control unit 55 stops driving the pump 14 (yes in step ST5). At this time, as Figure 4As shown by the double-dashed line in the middle, the palmar cuff 71 and the dorsal cuff 74 are fully inflated, and the inflated palmar cuff 71 presses against the back plate 72. In addition, the dorsal cuff 74 presses the retaining ring 5 in a direction separating from the wrist 200. As a result, the belt 4, the retaining ring 5, and the device main body 3 move in a direction separating from the wrist 200. Consequently, the palmar cuff 71, the back plate 72, and the sensing cuff 73 are stretched toward the wrist 200 side. In addition, when the belt 4, the retaining ring 5, and the device main body 3 move in a direction separating from the wrist 200 due to the inflation of the dorsal cuff 74, the belt 4, the retaining ring 5, and the device main body 3 move in a state where the belt 4 and the retaining ring 5 move to both sides of the wrist 200 and closely adhere to both sides of the wrist 200. Therefore, the belt 4 and the retaining ring 5 that closely adhere to the skin of the wrist 200 stretch the skin on both sides of the wrist 200 toward the back of the hand. It should be noted that the retaining ring 5 may be configured to indirectly contact the skin of the wrist 200 through, for example, sheet members 86 and 106 as long as it can stretch the skin of the wrist 200.

[0169] Moreover, the sensing cuff 73 is inflated by supplying a prescribed amount of air so that the internal pressure becomes the pressure required for measuring blood pressure, and is pressed toward the wrist 200 by pressing against the back plate 72 of the palmar cuff 71. Therefore, the sensing cuff 73 presses the artery 210 in the wrist 200 and, as Figure 22 shown, occludes the artery 210.

[0170] In addition, the control unit 55 controls, for example, the second on-off valve 16B, repeatedly opens and closes the second on-off valve 16B, or adjusts the opening degree of the second on-off valve 16B, thereby pressurizing the pressure in the internal space of the palmar cuff 71. Based on the electric signal output by the second pressure sensor 17B during this pressurization process, the control unit 55 obtains measurement results such as blood pressure values (e.g., maximum blood pressure and minimum blood pressure) and heart rate (step ST6). The control unit 55 outputs an image signal corresponding to the obtained measurement results to the display unit 12 and displays the measurement results on the display unit 12 (step ST7). In addition, after the blood pressure measurement is completed, the control unit 55 opens the first on-off valve 16A and the second on-off valve 16B.

[0171] When receiving the image signal, the display unit 12 displays the measurement results on the screen. The user visually confirms the measurement results by checking the display unit 12. It should be noted that after the measurement is completed, the user removes the buckle 61f from the small hole 62a, removes the second belt 62 from the frame body 61e, and removes the wrist 200 from the retaining ring 5, thereby removing the blood pressure measurement device 1 from the wrist 200.

[0172] The blood pressure measuring device 1 of one embodiment configured in this manner adopts a configuration in which the bonded portions 82 and 102 that are bonded to the snap ring 5 via the bonding layer 75 are provided on the palmar cuff 71 and the dorsal cuff 74 that serve as cuffs. In addition, the bonded portions 82 and 102 are bonded to the outer peripheral surface of the snap ring 5.

[0173] Therefore, in the blood pressure measuring device 1, when the air bags 81 and 101 expand, even if the fourth sheet member 86d and the eighteenth sheet member 106l on the inner peripheral surface side of the snap ring 5 are deformed, the bonded portions 82 and 102 are located on the outer peripheral surface side of the snap ring 5 and thus will not be deformed. As a result, the stress on the bonding layer 75 between the bonded portions 82 and 102 and the outer peripheral surface of the snap ring 5 when the air bags 81 and 101 expand is applied in the shear direction in the plane direction along the outer peripheral surface of the snap ring 5. Therefore, the stress applied between the snap ring 5 and the cuff structure 6 when the air bags 81 and 101 expand can be reduced. Thus, even if the bonding strength of the adhesive, double-sided tape, etc. used for the bonding layer 75 is the same as that of the adhesive, double-sided tape, etc. used in the prior art, the palmar cuff 71 and the dorsal cuff 74 can be prevented from peeling off from the snap ring 5.

[0174] Use Figure 23 This effect will be specifically described. It should be noted that, Figure 23 is an explanatory diagram showing an example of the direction of the stress generated in the bonded portions 82 and 102 of the cuffs 71 and 74 in the present embodiment and the direction of the stress generated in the sheet members 86 and 106 of the cuff in the conventional example. It should be noted that, Figure 23 the (conventional example) blood pressure measuring device does not have the bonded portions 82 and 102.

[0175] In the case where the conventional blood pressure measuring device does not have the bonded portion 82 and only directly bonds the fourth sheet member 86d and the eighteenth sheet member 106l to the snap ring 5, the central side of the air bags 81 and 101 expands more than the end side of the air bags 81 and 101. Therefore, the central side of the air bags 81 and 101 maintains the state of being bonded to the snap ring 5, but the end side of the air bags 81 and 101 is forced in the direction of separating from the snap ring 5.

[0176] As a result, in the configuration without the bonded portion 82, the stress applied to the bonding layer 75 that bonds the air bags 81 and 101 to the snap ring is concentrated on the edge side of the air bags 81 and 101. In this way, as Figure 23As shown by the arrows in (the conventional example), stress is generated in the bonding layer 75 in such a manner that the sheet members 86 and 106 are peeled off from the retaining ring 5 starting from the edge side of the air bags 81 and 101. Therefore, when the air bags 81 and 101 repeatedly expand and contract, the air bags 81 and 101 may be peeled off from the retaining ring 5. In particular, this situation occurs when the bonding width becomes small, so the air bags 81 and 101 may be peeled off from the retaining ring 5 starting from the edge in the width direction in a direction orthogonal to the long dimension direction of the air bags 81 and 101.

[0177] However, in the blood pressure measurement device 1 of the present embodiment, the bonded portions 82 and 102 are arranged on the outer peripheral surface of the retaining ring 5, and the outer peripheral surface of the retaining ring 5 and the bonded portions 82 and 102 are bonded through the bonding layer 75. Therefore, when the air bags 81 and 101 expand, the bonded portion 82 is stretched along the surface direction of the outer peripheral surface of the retaining ring 5 or a direction approximate to the surface direction. Therefore, as Figure 23 shown by the arrows in (the embodiment), the force applied to the bonding layer 75 is a force in the shear direction. That is, the stress applied to the bonding layer 75 is a shear stress along the surface direction of the outer peripheral surface of the retaining ring 5, so the bonding area can be ensured. Therefore, compared with the conventional example in which the air bags 81 and 101 are directly bonded to the retaining ring 5 without the bonded portions 82 and 102, bonding the air bags 81 and 101 to the retaining ring 5 via the bonded portions 82 and 102 can suppress the cuff 71 and 74 from being peeled off from the retaining ring 5.

[0178] In this way, the blood pressure measurement device 1 can suppress the air bags 81 and 101 from being peeled off from the retaining ring 5 starting from the edge portion side by providing the bonded portions 82 and 102. In addition, a bonding layer 75 is provided between the inner peripheral surface of the retaining ring 5 and the fourth sheet member 86d and the eighteenth sheet member 106l opposed to the inner peripheral surface of the retaining ring 5 for the air bags 81 and 101, thereby also bonding the air bags 81 and 101 to the inner peripheral surface of the retaining ring 5. Therefore, the bonding area for bonding the cuffs 71 and 74 to the retaining ring 5 can be ensured. In this way, the blood pressure measurement device 1 can suppress the retaining ring 5 from being peeled off from the cuff structure 6 by providing the bonded portions 82 and 102.

[0179] As a result, even if the cuff structure 6 repeatedly expands and contracts, the blood pressure measurement device 1 has high durability and can perform blood pressure measurement with high accuracy for a long time.

[0180] In addition, since the blood pressure measurement device 1 can suppress the retaining ring 5 from being peeled off from the cuff structure 6, the width in the direction orthogonal to the long dimension direction of the air bags 81 and 101 can be reduced. Therefore, the blood pressure measurement device 1 can be miniaturized.

[0181] In addition, the blood pressure measuring device 1 can make the force generated in the bonding layer 75 between the bonded parts 82 and 102 and the snap ring 5 a force in the shearing direction. Therefore, the blood pressure measuring device 1 can suppress the deformation of the snap ring 5 caused by repeated use.

[0182] Specific examples will be given to illustrate this effect. For example, in order to prevent the cuff structure 6 from being easily peeled off from the snap ring 5, it is also considered to use a material with strong bonding properties for the bonding layer 75 such as an adhesive or double-sided tape, and bond the cuff structure with the conventional structure without using the bonded parts 82 and 102 to the snap ring 5. However, if a material with high bonding property is used for the bonding layer 75, the snap ring 5 may also flex according to the mechanical properties of the snap ring 5 as the cuff structure 6 expands. If the cuff structure 6 repeatedly expands and contracts in a state where the snap ring 5 flexes as the cuff structure 6 expands, creep deformation may also occur in the snap ring 5, and the snap ring 5 may become a flexed shape, making it impossible to perform appropriate blood pressure measurement.

[0183] In contrast, the blood pressure measuring device 1 of the present embodiment bonds the bonded parts 82 and 102 to the outer peripheral surface of the snap ring 5, and does not provide a material with strong bonding property to the bonding layer 75. Thereby, the stress generated at the joint between the snap ring 5 and the cuff structure 6 can be reduced, and the direction of this stress is along the surface direction of the outer peripheral surface of the snap ring 5. Therefore, it is possible to suppress the snap ring 5 from flexing as the cuff structure 6 expands. Thus, the blood pressure measuring device 1 can suppress the deformation of the snap ring 5 and can suppress the decrease in blood pressure measurement accuracy caused by the deformation of the snap ring 5.

[0184] As a result, the blood pressure measuring device 1 can be miniaturized, and high-precision blood pressure measurement can be stably performed for a long time.

[0185] In addition, the blood pressure measuring device 1 adopts a structure in which the bonded parts 82 and 102 in the short dimension direction of the air bags 81 and 101 are stacked and bonded. Therefore, in addition to the structure in which the snap ring 5 is bonded to the bonded parts 82 and 102 via the bonding layer 75, it is also a structure in which the bonded parts 82 and 102 are bonded to each other. Therefore, when an external force in the direction of separating from the snap ring 5 is applied to the bonded parts 82 and 102, in addition to the bonding achieved by the bonding layer 75 between the snap ring and the bonded parts 82 and 102, the separation of the bonded parts 82 and 102 from the snap ring 5 is also suppressed by the bonding between the bonded parts 82 and 102.

[0186] In addition, by adopting a configuration in which the stacked joint portions 82 and 102 are welded using heat, the stacked joint portions 82 and 102 can be firmly joined. In this way, by stacking and joining the joint portions 82 and 102, when an external force is applied to the joint portions 82 and 102, such as when using the blood pressure measuring device 1, the blood pressure measuring device 1 can prevent the joint portions 82 and 102 from peeling off from the outer peripheral surface of the snap ring 5. In addition, since the joint portions 82 and 102 have a simple configuration formed by the sheet members 86 and 106, they are easy to manufacture.

[0187] In addition, in the blood pressure measuring device 1, the cuffs 71 and 74 are configured such that the joint portions 82 and 102 are formed by the sheet members 86c and 106k, and the sheet members 86c and 106k are welded to the sheet members 86d and 106l that are adjacent to the snap ring 5 and joined to the inner peripheral surface of the snap ring 5 among the sheet members 86 and 106 that form the air bags 81 and 101. According to this configuration, the end portions in the short dimension direction of the sheet members 86d and 106l adjacent to the snap ring 5 are covered by the sheet members 86c and 106k that form the joint portions 82 and 102. Therefore, the appearance of the cuffs 71 and 74 can be improved.

[0188] In addition, in the blood pressure measuring device 1, the portions of the joint portions 82 and 102 that are joined to the outer peripheral surface side of the snap ring 5 are formed by a single sheet member 86 and 106. Therefore, when the snap ring 5 and the cuffs 71 and 74 are formed integrally, an increase in the thickness of the snap ring 5 and the cuffs 71 and 74 can be suppressed.

[0189] As described above, according to the blood pressure measuring device 1 of the present embodiment, peeling between the snap ring 5 and the cuff structure 6 can be suppressed.

[0190] It should be noted that the present invention is not limited to the above-described embodiment. In the above example, a configuration in which the joint portions 82 and 102 provided in the short dimension direction of the air bags 81 and 101 in the cuffs 71 and 74 are stacked and welded in the short dimension direction of the air bags 81 and 101 has been described, but it is not limited thereto. For example, as in the cuffs 71 and 74 of the modified example shown in Figure 24 , a configuration in which the joint portions 82 and 102 are not stacked may also be used.

[0191] In addition, in the above example, a configuration in which the width in the short dimension direction of the air bag 81 in the cuffs 71 and 74 is set to the same width as the width in the short dimension direction of the snap ring 5 and the air bags 81 and 101 are arranged only on the inner peripheral surface of the snap ring 5 has been described, but it is not limited thereto. For example, as in the cuffs 71 and 74 of the modified example shown in Figures 25 to 27 , a configuration in which the air bags 81 and 101 are arranged not only on the inner peripheral surface of the snap ring 5 but also on the side surface and the outer peripheral surface side of the snap ring 5 may also be used.

[0192] In Figure 25 the modification shown, in cuffs 71 and 74, the inflated regions of air bags 81 and 101 are arranged on the inner peripheral surface of snap ring 5, and the welded portions 81a and 101a of air bags 81 and 101 are arranged on the side surface of snap ring 5. In addition, in Figure 26 and Figure 27 the modification shown, in cuffs 71 and 74, the inflated regions of air bags 81 and 101 are arranged on the inner peripheral surface and the side surface of snap ring 5, and the welded portions 81a and 101a of air bags 81 and 101 are arranged on the outer peripheral surface of snap ring 5. In configurations like these modifications, by adopting a configuration in which air bags 81 and 101 are arranged not only on the inner peripheral surface of snap ring 5 but also over the side surface and the outer peripheral surface side of snap ring 5, the blood pressure measuring device 1 can increase the region capable of pressurizing the wrist 200, and thus the blood pressure measurement accuracy can be improved.

[0193] In addition, in the above example, a configuration in which two joined portions 102 are stacked and welded on one end side in the short dimension direction of snap ring 5 has been described, but it is not limited thereto. For example, as Figure 27 shown, it may also be a configuration in which two joined portions 102 are stacked and welded at the center in the short dimension direction of snap ring 5.

[0194] In addition, in the above example, a configuration in which in cuffs 71 and 74, joined portions 82 and 102 are formed by cutting sheet members 86 and 106 into a prescribed shape has been described, but for example, as in Figure 28 the modification shown, the joined portions 82 and 102 may also be in a bag shape into which snap ring 5 can be inserted. In addition, in the above example, a configuration in which the joined portions 82 and 102 are formed from a single sheet member 86 and 106 has been described, but it is not limited thereto. For example, the joined portions 82 and 102 may be formed from two sheet members 86 and 106 that respectively form air bags 81 and 101 adjacent to snap ring 5.

[0195] In addition, in the above example, a configuration in which in cuffs 71 and 74, joined portions 82 and 102 are formed from sheet members 86 and 106 has been described, and these sheet members 86 and 106 are welded to the sheet members 86 and 106 that form air bags 81 and 101 and are adjacent to air bags 81 and 101 of snap ring 5 and are joined to the inner peripheral surface of snap ring 5, but it is not limited thereto. For example, the joined portions 82 and 102 may also be formed from the sheet members 86 and 106 that form air bags 81 and 101 and are adjacent to air bags 81 and 101 of snap ring 5 and are joined to the inner peripheral surface of snap ring 5.

[0196] In addition, in the above example, the structure in which the joint portion 102 of the dorsal cuff 74 is provided at a position avoiding the position facing the cover portion 5a of the snap ring 5 in the airbag 101 has been described, but it is not limited thereto. It may also be a structure in which the joint portion 102 is further provided at a position facing the cover portion 5a, covering the cover portion 5a, and joined to the cover portion 5a via the joint layer 75.

[0197] In addition, in the above example, an example in which the snap ring 5 has a cover portion 5a and the cover portion 5a and the back cover 35 constitute the back cover on the biological side covering the contour housing 31 has been described, but it is not limited thereto. That is, the blood pressure measuring device 1 may also be configured to include a back cover on the biological side covering the contour housing 31 and the snap ring 5 is fixed to the back cover without having the back cover 35 and the cover portion 5a.

[0198] In addition, in the above example, the structure having the two on-off valves 16 including the first on-off valve 16A and the second on-off valve 16B has been described as an example, but it is not limited thereto. For example, a structure in which four on-off valves 16 are provided may also be used.

[0199] In addition, for example, the opening and closing times of the first on-off valve 16A and the second on-off valve 16B when the blood pressure measuring device 1 measures blood pressure are not limited to the above example and can be set appropriately. In addition, an example in which the blood pressure measuring device 1 calculates blood pressure based on the pressure measured during the pressurization process of the palmar cuff 71 has been described, but it is not limited thereto. Blood pressure may also be calculated during the decompression process, and in addition, blood pressure may be calculated during both the pressurization process and the decompression process.

[0200] In addition, in the above example, the structure in which the back plate 72 has a plurality of grooves 72a has been described, but it is not limited thereto. For example, in the back plate 72, in order to manage the ease of deformation, etc., the number, depth, etc. of the plurality of grooves 72a can be set appropriately. In addition, it may also be a structure including a member that suppresses deformation.

[0201] Moreover, in the above example, the blood pressure measuring device 1 has been described using the example of a wearable device worn on the wrist 200, but it is not limited thereto. For example, the blood pressure measuring device may also be a blood pressure measuring device 1A that is wound around the upper arm to measure blood pressure. Hereinafter, as a second embodiment, Figure 29 and Figure 30 the blood pressure measuring device 1A will be described. It should be noted that the same reference numerals are assigned to the same structures as those of the blood pressure measuring device 1 of the above first embodiment in the structure of the present embodiment, and the description and illustration thereof are appropriately omitted.

[0202] For example, as Figure 29 and Figure 30As shown, the blood pressure measuring device 1A in the second embodiment includes a device main body 3A and a cuff structure 6A. The device main body 3A includes, for example, a housing 11A, a display unit 12, an operation unit 13, a pump 14, a flow path unit 15, an on-off valve 16, a pressure sensor 17, a power supply unit 18, and a control board 20. As Figure 29 shown, the device main body 3A has one each of a pump 14, an on-off valve 16, and a pressure sensor 17.

[0203] The housing 11A is configured in a box shape, for example. The housing 11A has a fitting portion 11a for fixing the cuff structure 6A. The fitting portion 11a is, for example, an opening provided on the back surface of the housing 11A.

[0204] As Figure 29 and Figure 30 shown, the cuff structure 6A includes: a retaining ring 5A made of a thermoplastic resin material; a pressing cuff 71A provided on the biological body side of the retaining ring 5A and made of a thermoplastic resin material; and a bag-shaped cover 76 formed of cloth or the like that houses the retaining ring 5A and the pressing cuff 71A inside. The cuff structure 6A is wound around the upper arm.

[0205] The retaining ring 5A has, for example, a protruding portion 5d fixed to the fitting portion 11a.

[0206] The pressing cuff 71S includes: an air bag 81A; a joined portion 82 provided on the air bag 81A; and a tube provided on the air bag 81A and fluidly continuous with the flow path unit 15. The pressing cuff 71A and the retaining ring 5A are housed together inside the bag-shaped cover 76. The air bag 81A is disposed on the inner peripheral surface of the retaining ring 5A and is joined to the outer peripheral surface of the retaining ring 5A via the joined portion 82 and a joining layer 75. It should be noted that the air bag 81A may also be joined to the retaining ring 5A via the joining layer 75.

[0207] The air bag 81A is configured as a rectangle that is long in one direction. The air bag 81A is formed, for example, by combining two sheet members 86 that are long in one direction and welding the edge portions using heat. As a specific example, as Figure 24 shown, the air bag 81A includes a first sheet member 86a and a second sheet member 86b that forms the air bag 81A with the first sheet member 86a, starting from the biological body side. The joined portion 82 is formed, for example, on one of the two sheet members 86 that form the air bag 81A, for example, on the second sheet member 86b.

[0208] The blood pressure measuring device 1A configured in this way, like the blood pressure measuring device 1 in the above-described first embodiment, can be miniaturized and can perform highly accurate blood pressure measurement stably for a long time.

[0209] That is, each of the above-described embodiments is merely an example of the present invention in all aspects. Of course, various improvements and modifications can be made without departing from the scope of the present invention. That is to say, when implementing the present invention, specific configurations corresponding to the embodiments can also be appropriately adopted.

[0210] Description of Reference Numerals

[0211] 1, 1A... Blood pressure measurement device;

[0212] 3, 3A... Device main body;

[0213] 4... Band;

[0214] 5, 5A... Snap ring;

[0215] 5a... Cover portion;

[0216] 5b... Threaded hole;

[0217] 5c... Hole portion;

[0218] 5d... Protrusion portion;

[0219] 6, 6A... Cuff structure;

[0220] 7... Fluid circuit;

[0221] 7a... First flow path;

[0222] 7b... Second flow path;

[0223] 7c... Third flow path;

[0224] 8... Power supply unit;

[0225] 8a... Wiring portion;

[0226] 8b... Power supply terminal;

[0227] 8c... Cover;

[0228] 11, 11A... Housing;

[0229] 11a... Assembly portion;

[0230] 12... Display unit;

[0231] 13... Operation unit;

[0232] 14... Pump;

[0233] 15... Flow path portion;

[0234] 16... On-off valve;

[0235] 16A... First on-off valve;

[0236] 16B... Second on-off valve;

[0237] 17… Pressure sensor;

[0238] 17A… First pressure sensor;

[0239] 17B… Second pressure sensor;

[0240] 18… Power supply unit;

[0241] 19… Vibration motor;

[0242] 20… Control board;

[0243] 31… Contour housing;

[0244] 31a… Ear;

[0245] 31b… Spring rod;

[0246] 32… Windshield;

[0247] 33… Base;

[0248] 35… Back cover;

[0249] 35a… Small screw;

[0250] 41… Button;

[0251] 42… Sensor;

[0252] 43… Touch panel;

[0253] 51… Board;

[0254] 52… Acceleration sensor;

[0255] 53… Communication unit;

[0256] 54… Storage unit;

[0257] 55… Control unit;

[0258] 56… Main CPU;

[0259] 57… Sub CPU;

[0260] 61… First belt;

[0261] 61a… Belt part;

[0262] 61b… Buckle;

[0263] 61c… First hole part;

[0264] 61d… Second hole part;

[0265] 61e… Frame body;

[0266] 61f…Snap tongue;

[0267] 62…Second band;

[0268] 62a…Small hole;

[0269] 62b…Third hole part;

[0270] 71…Volar cuff (cuff);

[0271] 71A…Pressing cuff;

[0272] 72…Back plate;

[0273] 72a…Groove;

[0274] 73…Sensing cuff;

[0275] 74…Dorsal cuff (cuff);

[0276] 75…Bonding layer;

[0277] 76…Bag-shaped cover;

[0278] 81, 81A…Bag-shaped structure (air bag);

[0279] 81a…Welded part;

[0280] 82…Part to be joined;

[0281] 83…Tube;

[0282] 83a…Welded part;

[0283] 84…Connection part;

[0284] 86…Sheet member;

[0285] 86a…First sheet member;

[0286] 86b…Second sheet member;

[0287] 86b1…Opening;

[0288] 86c…Third sheet member;

[0289] 86c1…Opening;

[0290] 86d…Fourth sheet member;

[0291] 86d1…Hole part;

[0292] 91…Bag-shaped structure (air bag);

[0293] 91a…Welded part;

[0294] 92…Tube;

[0295] 92a…Welding part;

[0296] 93…Connecting part;

[0297] 96…Sheet member;

[0298] 96a…Fifth sheet member;

[0299] 96b…Sixth sheet member;

[0300] 96b1…Hole part;

[0301] 101…Bag-like structure (airbag);

[0302] 101a…Welding part;

[0303] 102…Part to be joined;

[0304] 102a…Avoidance part;

[0305] 103…Connecting part;

[0306] 106…Sheet member;

[0307] 106a…Seventh sheet member;

[0308] 106b…Eighth sheet member;

[0309] 106b1…Opening;

[0310] 106c…Ninth sheet member;

[0311] 106c1…Opening;

[0312] 106d…Tenth sheet member;

[0313] 106d1…Opening;

[0314] 106e…Eleventh sheet member;

[0315] 106e1…Opening;

[0316] 106f…Twelfth sheet member;

[0317] 106f1…Opening;

[0318] 106g…Thirteenth sheet member;

[0319] 106g1…Opening;

[0320] 106h…Fourteenth sheet member;

[0321] 106h1…Opening;

[0322] 106i…The fifteenth sheet member;

[0323] 106i1…Opening;

[0324] 106j…The sixteenth sheet member;

[0325] 106j1…Opening;

[0326] 106k…The seventeenth sheet member;

[0327] 106k1…Opening;

[0328] 106l…The eighteenth sheet member;

[0329] 106l1…Hole part;

[0330] 200…Wrist;

[0331] 210…Artery.

Claims

1. A blood pressure measuring device, comprising: a retaining ring that is bent in the circumferential direction of the wearing part of the living body; and a cuff having: a bag-shaped structure that is stacked in multiple layers and is long in one direction, the bag-shaped structure being formed by welding two sheet members made of a resin material and expanding due to fluid; and a joint portion provided at at least a part of the edge portion of the bag-shaped structure disposed opposite to the retaining ring, joined to the outer peripheral surface side of the retaining ring, and formed by a part of the sheet member constituting the bag-shaped structure disposed opposite to the retaining ring, a cover portion provided with a device main body on one end side of the retaining ring, the joint portion being provided so as to avoid the cover portion, the joint portion being provided at two positions in the long dimension direction of the bag-shaped structure, the expanded area of the bag-shaped structure being disposed on the inner peripheral surface of the retaining ring, and the welded portion of the two sheet members of the bag-shaped structure being disposed on the side surface of the retaining ring.

2. The blood pressure measuring device according to claim 1, wherein the joint portion is provided at each edge portion in the short dimension direction of the bag-shaped structure.

3. The blood pressure measuring device according to claim 1 or 2, further comprising: a bonding layer provided between the joint portion and the retaining ring to bond the joint portion and the retaining ring.

4. The blood pressure measuring device according to claim 3, wherein the bonding layer is further provided between the bag-shaped structure and the inner peripheral surface of the retaining ring.

5. The blood pressure measuring device according to claim 3, wherein the bonding layer is a double-sided adhesive tape.

6. The blood pressure measuring device according to claim 4, wherein the bonding layer is a double-sided adhesive tape.

7. The blood pressure measuring device according to claim 2, wherein the joint portions provided at each edge portion in the short dimension direction of the bag-shaped structure are stacked on the outer peripheral surface side of the retaining ring and joined together.

8. The blood pressure measuring device according to claim 7, wherein the stacked joint portions are joined by welding.

9. The blood pressure measuring device according to claim 2, wherein the width in the short dimension direction of the bag-shaped structure is equal to or greater than the width in the short dimension direction of the retaining ring.

10. The blood pressure measuring device according to claim 1, wherein the portion of the joint portion facing the outer peripheral surface of the retaining ring is formed by one sheet member.

Images