WO2010013554A1 - Device for measuring blood pressure information - Google Patents

Abstract

A blood pressure meter is provided with a cuff (20A) having therein an air bag and also with an expanding and contracting mechanism for expanding and contracting the air bag.  The cuff (20A) has a tubular cuff body section (30), and the cuff body section (30) is provided with fastening belts (31, 32) wrapped around the outside of the air bag and also with a fastening length adjusting mechanism (50) for variably adjusting the fastening length of the fastening belts (31, 32) relative to an upper arm.  The blood pressure meter is also provided with an upper arm circumference measuring section for measuring the circumferential length of the upper arm by using the fastening belts (31, 32).  The fastening belts (31, 32) have a barcode (74) for specifying the circumferential length of the upper arm.  The circumference measuring section includes a photoelectric sensor for specifying the circumferential length of the upper arm by reading the marker (74).  Thus, the blood pressure meter has a function capable of accurately and precisely measuring the circumferential length of the upper arm which is a portion to be measured.

Description

Blood pressure information measuring device

The present invention relates to a blood pressure information measuring device capable of measuring blood pressure information such as a blood pressure value, and more particularly, to a blood pressure information measuring device having a function of measuring the perimeter of a measurement site to which a cuff is attached.

It is very important to acquire the blood pressure information of the subject in order to know the health status of the subject. In recent years, it is not limited to acquiring systolic blood pressure values (maximum blood pressure values), diastolic blood pressure values (minimum blood pressure values), etc., which have been widely recognized as useful indicators of health care. Attempts have been made to capture changes in cardiac load and arterial stiffness by acquiring a subject's pulse wave. The blood pressure information measuring device is a device for obtaining indexes for health management based on the acquired blood pressure information, and is expected to be further utilized in the fields of early detection, prevention, treatment, etc. of cardiovascular diseases. Yes. The blood pressure information includes a wide variety of information related to the circulatory system such as systolic blood pressure value, diastolic blood pressure value, average blood pressure value, pulse wave, pulse, AI (Augmentation Index) value, and the like.

Generally, a cuff containing a fluid bag is used for measuring blood pressure information. Here, the cuff means a band-shaped structure having a lumen and can be wound around a part of a living body, and a fluid bag is formed by injecting a fluid such as gas or liquid into the lumen. It refers to what is used to measure blood pressure information after being inflated and deflated. For example, in a blood pressure information measuring device (hereinafter also simply referred to as a sphygmomanometer) for measuring a blood pressure value such as a systolic blood pressure value or a diastolic blood pressure value, a living body is provided with a cuff that contains a fluid bag for compressing an artery. The blood pressure value is measured by winding the wound fluid bag on the body surface and expanding / contracting the wound fluid bag to capture the arterial pressure pulse wave as a change in the internal pressure of the fluid bag. In particular, the cuff used by being wound around the arm is also called an armband or a manchette.

The air bag as a fluid bag contained in the cuff is wound around the measurement site so as to cover the entire measurement site when the cuff is attached to the measurement site. In the case of a sphygmomanometer for measuring blood pressure values such as systolic blood pressure values and diastolic blood pressure values, the upper arm and wrist are generally used as the measurement site, but there are large individual differences in the size of the upper arm and wrist . Therefore, when trying to deal with all people from thin arm to thick arm with a single size cuff, the length in the winding direction of the air bag contained in the cuff is constant. On the other hand, since the circumference of the site to be measured is different for each subject, the wrapped state of the air bag varies depending on the size of the site to be measured.

This difference in winding state may affect the blood pressure measurement results. In particular, when the subject's arm is thick, the entire measurement site cannot be completely covered with the air bag in the wearing state, and the circumferential portion of the measurement site is not covered with the air bag. Can be. In this case, sufficient compression force cannot be obtained when the measurement site is compressed by the air bag, and the blood pressure value is measured slightly higher than the actual blood pressure value.

As a sphygmomanometer designed to solve such a problem, for example, a sphygmomanometer disclosed in Japanese Patent Application Laid-Open No. 2004-154458 (Patent Document 1) or a blood pressure disclosed in Japanese Patent Application Laid-Open No. 7-59740 (Patent Document 2). There is a total. In the sphygmomanometer disclosed in the above Japanese Patent Application Laid-Open No. 2004-154458, a discharge amount measuring mechanism for measuring the discharge amount of the pressurizing pump by detecting the rotation speed of the pressurizing pump for pressurizing the air bag is provided. The peripheral length of the measured region of the subject is estimated based on the discharge amount and the cuff pressure (inner pressure of the air bag) measured by the discharge amount measuring mechanism, and the blood pressure value measured based on the estimation result A configuration in which correction is performed as necessary is employed. In the sphygmomanometer disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 7-59740, a hook including a conductive terminal is provided at one end portion in the circumferential direction of the cuff, and the hook is disposed at a portion near the other end portion in the circumferential direction of the cuff. A plurality of hook receivers including conductive terminals that can be hooked are provided, and the perimeter of the part to be measured is measured by detecting which position of the hook receiver is hooked when the cuff is attached. A configuration is adopted in which the blood pressure value measured based on is corrected as necessary.

JP 2004-154458 A JP 7-59740 A

However, even when the configuration disclosed in Japanese Patent Application Laid-Open No. 2004-154458 is adopted, there remains a problem that it is difficult to accurately estimate the perimeter of the measurement site. As described above, in the sphygmomanometer disclosed in Japanese Patent Application Laid-Open No. 2004-154458, the circumference of the measurement site is based on the discharge amount of the pressurizing pump and the cuff pressure until the cuff winding is completed. Although it is estimated, the discharge rate of the pressurizing pump is not uniquely determined by the circumference of the part to be measured and is also affected by the shape and softness of the part to be measured. Even if it exists, in the case where the body surface is softer, the estimated perimeter may be larger than the actual perimeter. Also, there may be an error in the estimated peripheral length of the measurement site, which is also estimated by the inflation state of the air bag that compresses the measurement site.If the air bag inflates into a balloon shape without inflating uniformly, etc. Also, there is a possibility that it is estimated to be larger than the actual perimeter.

Further, even when the configuration disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 7-59740 is adopted, an error may occur in the circumference of the measured site to be measured. As described above, in the sphygmomanometer disclosed in Japanese Patent Application Laid-Open No. 7-59740, the hook provided at one end portion in the circumferential direction of the cuff is attached to the other end portion in the circumferential direction of the cuff when the cuff is wound. Although it will be hooked on one of the hook receivers provided, since the cuff attachment itself is left to human hands, there will be a difference in the perimeter of the measured site depending on the winding state Become. In other words, when the cuff is attached to the upper arm exactly without gaps, the circumference of the measurement site is correctly measured, but when the cuff is loosely wrapped around the measurement site Will be measured larger than the actual perimeter, and if the cuff is wound around the measurement site that is tighter than necessary, it will be measured smaller than the actual perimeter. In addition, when the configuration disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 7-59740 is adopted, in order to measure the circumference of the measurement site more precisely, a very large number of hook receivers are densely provided at the other end of the cuff. In other words, it is actually difficult to manufacture.

In addition to the above-described measurement error problem, the conventional blood pressure monitor has the following problems.

First, in the case of a person with a very large size or an extremely small person to be measured, the cuff itself is in spite of the fact that it deviates from the range of the perimeter of the part to be measured that was assumed in the first place. As a result, there is a problem that blood pressure values can be measured as they are even though proper measurement results cannot be obtained. In such a situation, the subject may think that the measurement result is appropriate without knowing that the size of the part to be measured is outside the applicable range of the cuff, and not provide the subject with an inaccurate measurement result. Ingenuity was required.

Secondly, when the size of the part to be measured where the cuff is actually attached is known in advance, the optimal air bag is adjusted by controlling the operation of the pressurizing pump or the like to adjust the air flow rate. It is possible to adjust the inflating motion so that the inflated state is realized, and to adjust the inflating and deflating motion in order to reduce the time required for measurement. Such a control has not been performed in practice because the size of the film cannot be measured accurately and precisely. Therefore, a device for accurately and precisely measuring the size of the measurement site has been demanded.

The present invention has been made in view of the above-described problems, and a first object of the present invention is to measure blood pressure information having a function capable of accurately and precisely measuring the circumference of a measurement site. A second object of the present invention is to provide an apparatus, and in addition to the first object, by effectively utilizing the information on the circumference of the measured region to be measured, it is possible to improve the performance and increase the performance. The object is to provide a functional blood pressure information measuring device.

The blood pressure information measurement device according to the present invention includes a cuff, an expansion / contraction mechanism, a blood pressure information measurement unit, a tightening length adjustment mechanism, and a peripheral length measurement unit. The cuff includes a fluid bag for pressing the measurement site and a tightening belt wound around the fluid bag. The cuff has no cut in the circumferential direction and the measurement site can be inserted from the axial direction. It has the annular form comprised. The inflating and contracting mechanism is for inflating and deflating the fluid bag, and the blood pressure information measuring unit measures blood pressure information using the fluid bag. The tightening length adjusting mechanism is for variably adjusting the tightening length of the tightening belt with respect to the measurement site, and the perimeter measuring unit is for measuring the perimeter of the measurement site. is there.

In the blood pressure information measuring device according to the present invention, the circumference measuring unit determines the amount of movement of the tightening belt when the tightening belt is fastened and fixed to the measurement site using the tightening length adjusting mechanism. It is preferable to measure the perimeter of the measurement site by measuring.

In the blood pressure information measurement device according to the present invention, the circumference measurement unit preferably includes a marker provided on the fastening belt and a reading unit that reads the marker. It is preferable that the perimeter measurement unit is configured to measure the amount of movement of the fastening belt based on information read by the reading unit.

In the blood pressure information measurement device according to the present invention, the marker is preferably configured by a barcode, and in that case, the reading unit is configured by a photo interrupter for reading the barcode. It is preferable.

In the blood pressure information measurement device according to the present invention, the circumference measurement unit includes a rotating member that rotates as the fastening belt moves, and a rotation amount detection unit that detects the amount of rotation of the rotating member. In that case, it is preferable that the circumference measuring unit is configured to measure the movement amount of the fastening belt based on information detected by the rotation amount detection unit. .

The blood pressure information measurement device according to the present invention further includes a blood pressure information correction unit that corrects the blood pressure information measured by the blood pressure information measurement unit based on the circumference information of the measurement site detected by the circumference measurement unit. It is preferable to provide.

The blood pressure information measurement device according to the present invention controls at least one of the inflating operation and the deflating operation of the fluid bag by the inflating and deflating mechanism based on the circumference information of the measurement site detected by the circumference measuring unit. It is preferable to further include an expansion / contraction operation control unit.

The blood pressure information measurement device according to the present invention is based on the circumference information of the measurement site detected by the circumference measurement unit, and whether or not the circumference of the measurement site is within a predetermined measurable range. It is preferable to further include a determination unit that determines the above.

In the blood pressure information measuring device according to the present invention, the tightening length adjusting mechanism rotates the winding roller in the forward direction and the reverse direction, and the winding roller capable of winding and feeding the tightening belt. It preferably includes an electric motor to be driven and a brake that exerts a braking force on the winding roller when the electric motor is stopped.

In the blood pressure information measuring device according to the present invention, the cuff includes a cylindrical cuff main body including the fluid bag and the fastening belt, and a handle provided on the outer peripheral surface of the cuff main body. It is preferable that it contains.

In the blood pressure information measurement device according to the present invention, a winding operation unit for receiving a command to start the winding operation of the tightening belt by the winding roller is provided in the handle unit. Is preferred.

The blood pressure information measuring device according to the present invention preferably further includes a tightening force detection mechanism for detecting the tightening force of the tightening belt with respect to the measurement site. In this case, the tightening length adjusting mechanism is It is preferable that the winding operation of the tightening belt by the winding roller is stopped when the tightening force detection mechanism detects a predetermined amount of tightening force.

In the blood pressure information measuring device according to the present invention, the tightening force detection mechanism winds the tightening belt by the winding roller in a state where a predetermined amount of fluid is injected into the fluid bag by the expansion / contraction mechanism. It is preferable that the tightening force of the tightening belt with respect to the measurement site is detected by detecting the internal pressure of the fluid bag during the taking operation.

In the blood pressure information measuring device according to the present invention, the tightening force detection mechanism detects the rotational torque applied to the take-up roller when it is rotationally driven by the electric motor, whereby the tightening to the measurement site is performed. The belt tightening force may be detected.

In the blood pressure information measuring device according to the present invention, the expansion / contraction mechanism performs the pressurizing operation of the fluid bag for blood pressure information measurement after stopping the winding operation of the tightening belt by the winding roller. It is preferably configured to start.

In the blood pressure information measuring device according to the present invention, the tightening length adjusting mechanism starts the feeding operation of the tightening belt by the winding roller after the measurement operation for blood pressure information measurement is completed. It is preferable to be configured.

In the blood pressure information measuring device according to the present invention, the cuff body further includes a flexible member configured to be elastically deformable in the radial direction outside the fluid bag and inside the fastening belt. It is preferable.

According to the present invention, it is possible to provide a blood pressure information measuring device having a function capable of accurately and precisely measuring the peripheral length of a measurement site. Further, according to the present invention, it is possible to obtain a blood pressure information measuring device with high performance and high functionality by effectively utilizing the measured information on the circumference of the measured region.

It is a figure which shows the external appearance structure of the blood pressure meter in Embodiment 1 of this invention. It is a figure which shows the structure of the functional block of the sphygmomanometer in Embodiment 1 of this invention. It is a perspective view which shows the detailed structure of the cuff of the blood pressure meter in Embodiment 1 of this invention. FIG. 4 is a cross-sectional view of the cuff in a non-mounted state along the line IV-IV shown in FIG. 3. It is a model top view which shows the structure of the fastening length adjustment mechanism of the sphygmomanometer in Embodiment 1 of this invention. It is a schematic diagram which shows the structure of the upper arm circumference measurement part of the blood pressure meter in Embodiment 1 of this invention. It is a flowchart which shows the process sequence of the sphygmomanometer in Embodiment 1 of this invention. It is a timing chart which shows the operation state and operation state of each part of the blood pressure monitor in Embodiment 1 of this invention in time series. It is a schematic diagram for demonstrating the mounting | wearing operation | work which mounts | wears the upper arm with the cuff of the blood pressure monitor in Embodiment 1 of this invention. It is sectional drawing of the mounting state which mounted | wore the upper arm with the cuff of the blood pressure meter in Embodiment 1 of this invention. It is a flowchart which shows the process sequence of the blood pressure meter which concerns on the 1st modification of Embodiment 1 of this invention. It is a flowchart which shows the process sequence of the blood pressure meter which concerns on the 2nd modification of Embodiment 1 of this invention. It is a flowchart which shows the process sequence of the blood pressure meter which concerns on the 3rd modification of Embodiment 1 of this invention. It is a figure which shows the structure of the functional block of the blood pressure meter in Embodiment 2 of this invention. It is a flowchart which shows the process sequence of the blood pressure meter in Embodiment 2 of this invention. It is a timing chart which shows the operation condition and operation state of each part of the blood pressure monitor in Embodiment 2 of this invention in time series.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following embodiment, a so-called upper arm type sphygmomanometer configured to measure a systolic blood pressure value and a diastolic blood pressure value will be described as an example of the blood pressure information measuring device. In the sphygmomanometer shown below, the tightening operation for the upper arm of the cuff, the blood pressure measurement operation performed after the tightening operation, and the tightening release operation for the upper arm of the cuff performed after the measuring operation are automatically continued. Further, the circumference of the upper arm is automatically measured during the tightening operation on the upper arm of the cuff.

(Embodiment 1)
FIG. 1 is a diagram showing an external structure of a sphygmomanometer according to Embodiment 1 of the present invention. First, with reference to FIG. 1, the external structure of sphygmomanometer 1A in the present embodiment will be described.

As shown in FIG. 1, the sphygmomanometer 1A according to the present embodiment includes a main body 10, a cuff 20A, an air tube 90, and a connection cable 92. The main body 10 has a box-shaped housing, and a display unit 14 and an operation unit 16 are provided on an upper surface thereof. The main body 10 is used by being placed on a placement surface such as a table at the time of measurement. The cuff 20 </ b> A is configured in an annular shape having no cut in the circumferential direction, and includes a cylindrical cuff main body portion 30 including a hollow opening into which the upper arm can be inserted from the axial direction, and the cuff main body portion 30. And a grip portion 40 provided on the outer peripheral surface. At a predetermined position of the cuff body 30 of the cuff 20A, an encoder strip 73 for specifying the perimeter of the upper arm to which the cuff 20A is to be attached is attached. The cuff 20A is attached to the upper arm during measurement. The air tube 90 and the connection cable 92 respectively connect the main body 10 and the cuff 20 </ b> A configured separately.

FIG. 2 is a diagram showing a functional block configuration of the sphygmomanometer according to the present embodiment. Next, with reference to FIG. 2, the functional block configuration of sphygmomanometer 1A in the present embodiment will be described.

As shown in FIG. 2, the main body 10 includes a control unit 11, a memory unit 12, a power supply unit 18, a motor drive circuit 53, an electromagnetic brake drive circuit 54, in addition to the display unit 14 and the operation unit 16 described above. , Pressure pump 61, exhaust valve 62, pressure sensor 63, pressure pump drive circuit 64, exhaust valve drive circuit 65, amplifier 66, A / D (Analog / Digital) conversion circuit 67, upper arm And a peripheral length measuring circuit 72. On the other hand, the cuff 20A mainly includes an air bag 35, a fastening belt 32, a push button 44, a geared motor 51, an electromagnetic brake 52, a winding roller 58, and a photoelectric sensor 71.

The control part 11 is comprised by CPU (Central Processing Unit), for example, and is a means for controlling the whole sphygmomanometer 1A. The memory unit 12 is composed of, for example, a ROM (Read-Only Memory) or a RAM (Random-Access Memory), and stores a program for causing the control unit 11 or the like to execute a processing procedure for blood pressure measurement, This is a means for storing measurement results and the like. The display unit 14 is configured by, for example, an LCD (Liquid Crystal Display), and is a means for displaying measurement results and the like. The operation unit 16 is a means for receiving an operation by a subject or the like and inputting a command from the outside to the control unit 11 or the power supply unit 18. The power supply unit 18 is means for supplying power as a power source to the control unit 11.

The control unit 11 sends control signals for driving the geared motor 51, the electromagnetic brake 52, the pressure pump 61, and the exhaust valve 62 to the motor drive circuit 53, the electromagnetic brake drive circuit 54, the pressure pump drive circuit 64, and the exhaust valve drive. The upper arm circumference length of the subject is measured based on information on the fastening lengths of fastening belts 31 and 32 (described later) detected by the photoelectric sensor 71, or the blood pressure value as a measurement result is stored in the memory unit. 12 or the display unit 14. In addition, the control unit 11 includes a determination unit that determines whether or not the measured upper arm circumference is within a predetermined applicable range of the cuff 20A. Based on this, it also has a function of determining whether or not to shift to the subsequent blood pressure value measurement operation. Further, the control unit 11 includes a blood pressure information measurement unit that acquires the blood pressure value of the subject based on the pressure value detected by the pressure sensor 63, and the blood pressure value acquired by the blood pressure information measurement unit is the measurement result. Is input to the memory unit 12 and the display unit 14 described above. The sphygmomanometer 1A may further include an output unit that outputs a blood pressure value as a measurement result to an external device (for example, a PC (Personal Computer) or a printer). As the output unit, for example, a serial communication line or a writing device for various recording media can be used.

The motor drive circuit 53 controls the operation of the geared motor 51 based on the control signal input from the control unit 11. The electromagnetic brake drive circuit 54 controls the operation of the electromagnetic brake 52 based on the control signal input from the control unit 11. The pressurization pump drive circuit 64 controls the operation of the pressurization pump 61 based on the control signal input from the control unit 11. The exhaust valve drive circuit 65 controls the opening / closing operation of the exhaust valve 62 based on the control signal input from the control unit 11.

The air bag 35 is a fluid bag for pressing the upper arm in the mounted state, and is connected to an air system component 60 described later via the air tube 90 described above. The geared motor 51, the electromagnetic brake 52, and the take-up roller 58 correspond to a tightening length adjusting mechanism 50 that variably adjusts a tightening length with respect to upper arms of tightening belts 31 and 32 (see FIG. 3 and the like) described later. Electrical connection between the geared motor 51 and the motor drive circuit 53 and electrical connection between the electromagnetic brake 52 and the electromagnetic brake drive circuit 54 are performed by the connection cable 92 (see FIG. 1) described above.

The geared motor 51 is an electric motor that rotationally drives the winding roller 58 in the forward direction and the reverse direction, and its operation is controlled by the motor drive circuit 53 described above. The electromagnetic brake 52 is a brake that applies a braking force to the winding roller 58, and its operation is controlled by the electromagnetic brake drive circuit 54 described above. The take-up roller 58 is a member for taking up and sending out tightening belts 31 and 32 described later. The push button 44 corresponds to a winding operation operation unit that receives a test subject's command for starting a winding operation by the tightening length adjusting mechanism 50 including the geared motor 51, the electromagnetic brake 52, and the winding roller 58. .

The pressurizing pump 61 is for supplying air to the inner cavity of the air bladder 35, and its operation is controlled by the pressurizing pump driving circuit 64 described above. The exhaust valve 62 is used to maintain the pressure inside the air bladder 35 (hereinafter also referred to as “cuff pressure”) or to open the space inside the air bladder 35 to the outside. It is controlled by the exhaust valve drive circuit 65. The pressure sensor 63 inputs an output signal corresponding to the pressure inside the air bladder 35 to the amplifier 66. The amplifier 66 amplifies the output value of the pressure sensor 63 and inputs it to the A / D conversion circuit 67. The A / D conversion circuit 67 converts the analog signal input from the amplifier 66 into a digital signal and inputs the digital signal to the control unit 11. Of these components, the pressurization pump 61, the exhaust valve 62, and the pressure sensor 63 correspond to the air system component 60 described above. In particular, the pressurization pump 61 and the exhaust valve 62 inflate and contract the air bladder 35. It corresponds to an expansion / contraction mechanism.

In the sphygmomanometer 1A according to the present embodiment, the air bag 35 and the air system component 60 described above are used as a tightening force detection mechanism for detecting the tightening force of the tightening belt with respect to the upper arm. Will be described later.

The photoelectric sensor 71 (more specifically, a photo interrupter) is a reading unit for reading a bar code as a marker provided on the tightening belts 31 and 32 described later, and an electric signal corresponding to the read information is transmitted around the upper arm. Output to the length measuring circuit 72. The upper arm circumference measurement circuit 72 measures the upper arm circumference based on the electric signal input from the photoelectric sensor 71 and outputs an output signal corresponding to the measured upper arm circumference to the control unit 11. The bar code as the marker and the photoelectric sensor 71 as the reading unit are used as a perimeter measuring unit for measuring the perimeter of the upper arm, which is a measurement target, and details thereof will be described later.

FIG. 3 is a perspective view showing a detailed structure of the cuff of the sphygmomanometer according to the present embodiment, and FIG. 4 is a cross-sectional view of the cuff in a non-wearing state along line IV-IV shown in FIG. . FIG. 5 is a schematic top view showing the configuration of the tightening length adjusting mechanism of the sphygmomanometer according to the present embodiment, and FIG. 6 shows the configuration of the upper arm circumference measuring unit of the sphygmomanometer according to the present embodiment. It is a schematic diagram. Next, the detailed structure of the cuff 20A of the sphygmomanometer 1A according to the present embodiment will be described with reference to FIGS.

As shown in FIGS. 3 and 4, the cuff 20 </ b> A has a cylindrical cuff main body 30 that is attached to the upper arm, and a handle 40 that is provided on the outer peripheral surface of the cuff main body 30. . The handle portion 40 includes a base portion 41 that is a portion that is attached to the cuff main body portion 30 and a handle 42 that is a portion that is gripped by hand when attached. The cuff main body 30 is formed in a cylindrical shape so that the upper arm can be inserted in the axial direction, and the handle 40 is a handle 42 in a direction parallel to the axial direction of the cylindrical cuff main body 30. Is fixed to the cuff body 30 so as to extend. A tightening length adjusting mechanism 50 is disposed at a position on the outer peripheral surface of the cuff main body portion 30 and inside the base portion 41 of the handle portion 40. A photoelectric sensor 71 is provided at a predetermined position inside the base portion 41 of the handle portion 40. Further, the push button 44 described above is provided at a predetermined position on the outer surface of the handle portion 40.

The cuff main body 30 includes an annular winding belt 31, 32, an exterior cover 33 attached to the inside of the tightening belt 31, a curler 34 and an air bag 35 housed inside the exterior cover 33. Mainly prepared. The tightening belts 31 and 32 are made of a member such as a cloth that does not substantially stretch in the circumferential direction, and are connected to the wide first tightening belt 31 and the first tightening belt. A second tightening belt 32 having a narrow width.

The first tightening belt 31 is composed of a belt-like member having one end 31a and the other end 31b in the circumferential direction, and the handle portion 40 described above is attached to a predetermined position on the outer peripheral surface, and on the inner peripheral surface. The exterior cover 33 described above is attached. The second tightening belt 32 has one end portion 32 a and the other end portion 32 b in the circumferential direction, and one end portion 32 a is connected to the other end portion 31 b of the first tightening belt 31. The portion of the second tightening belt 32 near the other end 32b is overlapped with the outer peripheral side of the portion near the one end 31a of the first tightening belt 31, and the other end 32b of the second tightening belt 32 is The first tightening belt 31 is fixed to a take-up roller 58 disposed in a handle portion 40 attached to the outer peripheral surface of the first tightening belt 31. Accordingly, the first tightening belt 31 and the second tightening belt 32 function as one member configured in an annular shape, thereby forming the cuff body 30 having a hollow opening.

The length of the connected first tightening belt 31 and second tightening belt 32 is variably adjusted by the tightening length adjusting mechanism 50. In the state where the circumferential lengths of the connected first tightening belt 31 and second tightening belt 32 are increased, the cuff main body portion 30 is in an expanded state (a state in which the diameter is increased). Thus, in a state where the length in the circumferential direction is shortened, the cuff main body portion 30 takes a reduced diameter state (a state where the diameter is reduced).

The exterior cover 33 is formed of a member such as a cloth made of a stretchable low friction material, for example, and is attached on the inner peripheral surface of the first tightening belt 31 described above. More specifically, the outer cover 33 is fixed to the first tightening belt 31 by bonding the outer peripheral surface of the outer cover 33 to the inner peripheral surface of the first tightening belt 31 by adhesion or welding.

The curler 34 included in the exterior cover 33 is made of a flexible member formed by injection molding using a resin material such as polypropylene as a raw material. More specifically, the curler 34 is composed of an annular curved elastic plate having a cut 34a along the axial direction at a predetermined position in the circumferential direction, and when cut along a plane perpendicular to the axial direction, The shape is C-shaped or U-shaped. The curler 34 is configured to be elastically deformable in the radial direction while maintaining its own annular shape. Therefore, the curler 34 takes a state in which the diameter is greatly expanded in the above-described expanded diameter state, and conversely, takes a state in which the diameter is small and narrowed in the above-described reduced diameter state. In addition, when the cuff main body portion 30 is in the expanded state, the cuff main body portion 30 is greatly expanded by the elastic force of the curler 34, so that the upper arm can be inserted into and removed from the hollow opening of the cuff main body portion 30. It becomes easy.

The air bag 35 is made of a bag-shaped member that can be expanded and contracted, and is formed, for example, by laminating two resin films and welding the periphery thereof. The inner cavity of the air bladder 35 is connected to the air pipe 90 via a nipple (not shown). The inner cavity of the air bladder 35 is pressurized and decompressed by a pressurizing pump 61 and an exhaust valve 62 provided in the main body 10 at the time of measurement, whereby the air bladder 35 is expanded or contracted.

3 to 5, the tightening length adjusting mechanism 50 includes a geared motor 51, an electromagnetic brake 52, and a take-up roller 58. The geared motor 51, the electromagnetic brake 52, and the take-up roller 58 are assembled to a support frame 46 that is disposed on the outer peripheral surface of the cuff body 30 and inside the base 41 of the handle 40. . The support frame 46 is fixed on the outer peripheral surface of the first tightening belt 31, for example. Further, gears 55, 56, and 57 as power transmission mechanisms are assembled at predetermined positions of the support frame 46.

The geared motor 51 is a motor equipped with a reduction gear, and includes a motor portion 51a, a reduction portion 51b, and an output shaft 51c. A gear 55 is fixed to the output shaft 51 c of the geared motor 51. An electromagnetic brake 52 is disposed adjacent to the geared motor 51 at the axial end of the geared motor 51 opposite to the side where the output shaft 51c is located. The electromagnetic brake 52 exerts a braking force on the rotation shaft 51a1 by holding the rotation shaft 51a1 of the motor unit 51a.

The take-up roller 58 is fixed to a shaft 57a that is pivotally supported by the support frame 46, and is rotated by the rotation of the shaft 57a. The other end portion 32 b of the second tightening belt 32 described above is fixed to the winding roller 58. A gear 57 is fixed to the shaft 57a to which the winding roller 58 is fixed. A gear 56 is fixed to the shaft 56 a that is pivotally supported by the support frame 46. The gear 56 meshes with the gear 55 and the gear 57 described above, and transmits the rotational force generated on the output shaft 51 c of the geared motor 51 to the take-up roller 58. The gears 55, 56, and 57 are configured by adjusting the outer diameter and the number of teeth, respectively, and function as a speed reducer as well as the speed reducing portion 51 b of the geared motor 51.

As shown in FIG. 4, a photoelectric sensor 71 is disposed at a predetermined position inside the base portion 41 of the handle portion 40 so as to face the winding roller 58. Here, as shown in FIG. 6, the photoelectric sensor 71 includes a first photoelectric sensor 71 </ b> A and a second photoelectric sensor 71 </ b> B, and both of the two photoelectric sensors 71 </ b> A and 71 </ b> B face the winding roller 58. Are arranged as follows.

On the other hand, as shown in FIGS. 3 and 5, an encoder strip 73 is adhered to the surface of the second tightening belt 32. The encoder strip 73 passes through the portion on the detection surface side of the photoelectric sensor 71 when the second fastening belt 32 is taken up by the take-up roller 58, so that one end portion 32a of the second fastening belt 32 is passed. It is provided so as to extend from the closer portion toward the other end 32b side. The encoder strip 73 has a barcode 74 as a marker on its main surface.

Next, the operation of the tightening length adjustment mechanism 50 of the cuff 20A of the sphygmomanometer 1A according to the present embodiment will be described with reference to FIG. In sphygmomanometer 1A according to the present embodiment, as described above, tightening operation on upper arm of cuff 20A, measurement operation of blood pressure value performed after the tightening operation, and tightening on upper arm of cuff 20A performed after the measuring operation. The release operation is automatically and continuously performed. Among them, the tightening operation for the upper arm of the cuff 20A and the tightening releasing operation for the upper arm of the cuff 20A are respectively described below, the winding operation of the tightening belts 31 and 32 by the tightening length adjusting mechanism 50, and the tightening length adjustment. This is performed by the feeding operation of the fastening belts 31 and 32 by the mechanism 50.

Referring to FIG. 5, when geared motor 51 is rotationally driven in the forward direction, output shaft 51c of geared motor 51 rotates in the forward direction, and the rotational force is transmitted through gears 55, 56, 57 to the shaft. 57a and the winding roller 58 rotates in the forward direction. As the take-up roller 58 rotates in the forward direction, the second tightening belt 32 having the other end 32b fixed to the take-up roller 58 is taken up by the take-up roller 58 in the direction of arrow A in the figure. Due to the winding operation of the second tightening belt 32 by the winding roller 58, the tightening belts 31 and 32 have their tightening lengths reduced against the elastic force of the curler 34, and the hollow opening portion of the cuff main body portion 30. Is gradually reduced in diameter. That is, the winding operation realizes the tightening operation of the cuff 20A with respect to the upper arm. When the geared motor 51 is driven to rotate in the forward direction, the electromagnetic brake 52 is not in a state of holding the rotating shaft 51a1 of the motor unit 51a of the geared motor 51, and the motor unit 51a is restricted in its operation. It will be driven without.

On the other hand, in the state where the geared motor 51 is rotationally driven in the reverse direction, the output shaft 51c of the geared motor 51 rotates in the reverse direction, and the rotational force is transmitted to the shaft 57a via the gears 55, 56, 57, The winding roller 58 rotates in the reverse direction. When the winding roller 58 rotates in the reverse direction, the portion of the second tightening belt 32 that has been wound around the winding roller 58 is fed from the winding roller 58 in the direction of arrow B in the figure. By the feeding operation of the second tightening belt 32 by the winding roller 58, the tightening length of the tightening belts 31 and 32 is increased. At that time, the diameter of the hollow opening of the cuff body 30 is gradually increased based on the elastic force of the curler 34. In other words, the tightening release operation of the cuff 20A with respect to the upper arm is realized by the delivery operation. When the geared motor 51 is driven to rotate in the reverse direction, the electromagnetic brake 52 is not in a state of holding the rotating shaft 51a1 of the motor portion 51a of the geared motor 51, and the motor portion 51a is restricted in its operation. It will be driven without.

Further, when the geared motor 51 is not rotationally driven in either the forward direction or the reverse direction, that is, when the geared motor 51 is stopped, the rotating shaft 51a1 of the motor portion 51a of the geared motor 51 is held by the electromagnetic brake 52. It will be in the state. In this state, the braking force by the electromagnetic brake 52 reaches the take-up roller 58 via the rotary shaft 51a1, the speed reducer 51b, the output shaft 51c, the gears 55, 56, 57 and the shaft 57a of the motor 51a. The rotation operation of 58 is limited. Therefore, in this state, both the winding and feeding operations of the second tightening belt 32 by the winding roller 58 are stopped, and the diameter of the hollow opening of the cuff body 30 is maintained constant. Become.

Next, with reference to FIG. 2, a tightening force detection mechanism provided in the sphygmomanometer 1A in the present embodiment will be described. The tightening force detection mechanism is for detecting the tightening force of the cuff 20A against the upper arm during the above-described tightening operation of the cuff 20A in order to optimize the tightening state with respect to the upper arm of the cuff 20A.

In the sphygmomanometer 1A according to the present embodiment, the tightening force detection mechanism includes the air bag 35 and the air system component 60 shown in FIG. The tightening force detection mechanism is a mechanism for detecting the tightening force of the tightening belts 31 and 32 with respect to the upper arm, and captures the tightening force as the internal pressure of the air bladder 35.

Specifically, in the sphygmomanometer 1A according to the present embodiment, a predetermined amount of air is introduced into the air bag 35 prior to driving the tightening length adjusting mechanism 50 to reduce the diameter of the hollow opening of the cuff body 30. The air bag is injected between the fastening belts 31 and 32 and the upper arm, and the fastening length is reduced as the fastening length adjusting mechanism 50 is driven. By detecting the internal pressure of the air bag 35 by the pressure sensor 63, the tightening force applied to the upper arm by the tightening belts 31 and 32 is detected based on the detected internal pressure of the air bladder 35.

The control unit 11 monitors the internal pressure of the air bladder 35 during the tightening operation by the tightening length adjusting mechanism 50 described above, and stops the operation of the geared motor 51 when the predetermined pressure value is reached. At the same time, the electromagnetic brake 52 is operated to stop the rotation of the winding roller 58. As described above, the tightening state with respect to the upper arm of the cuff 20A can be set to the optimum state.

Next, with reference to FIG. 6, a detailed description will be given of a mechanism in which the perimeter of the upper arm is measured by the upper arm perimeter measurement unit of the sphygmomanometer 1A according to the present embodiment. The upper arm circumference measurement unit is for automatically measuring the circumference of the upper arm during the tightening operation on the upper arm of the cuff 20A.

As shown in FIG. 6, the upper arm circumference measurement unit includes a bar code 74 as a marker provided on the second fastening belt 32 and photoelectric sensors 71 </ b> A and 71 </ b> B provided in the base 41 of the handle 40. It is configured. The photoelectric sensors 71 </ b> A and 71 </ b> B are reading means for reading a bar code 74 provided on the encoder strip 73. Each of the photoelectric sensors 71A and 71B includes a light emitting portion and a light receiving portion, and the light emitted from the light emitting portion is applied to the encoder strip 73, and the reflected light is received by the light receiving portion, thereby reflecting the light. The presence / absence of the bar code 74 is detected based on the light amount difference. The photoelectric sensors 71 </ b> A and 71 </ b> B output an electrical signal by photoelectrically converting the received light, and the output electrical signal is input to the upper arm circumference measurement circuit 72. The upper arm circumference measurement circuit 72 identifies the circumference of the upper arm of the subject based on the input electrical signal, and inputs the identified circumference of the upper arm to the control unit 11.

More specifically, the bar code 74 provided on the encoder strip 73 has a bar code group of two columns of I column and II column shown in FIG. The bar codes included in the I column include an identifier for indicating the position information of the second tightening belt 32 in the portion to which the bar code is attached, and are detected by the photoelectric sensor 71A. The barcode included in the II column is an identifier for indicating the detection timing of the barcode included in the I column, and is detected by the photoelectric sensor 71B.

The two row barcode groups of the I row and the II row each have a section equally divided by a predetermined distance in the longitudinal direction of the second fastening belt 32. In the cuff 20A in the present embodiment, the length of each of the sections is 10 mm. The barcode included in the I column of each section includes a header and a footer, and a position mark. The header is located on the other end 32b side of the second tightening belt 32 and indicates the beginning of the section. The footer is located on the one end portion 32a side of the second fastening belt 32, and indicates the end of the section. The position mark is located between the header and the footer, and indicates the position information of the second fastening belt 32 at the start position of each section. On the other hand, the barcodes included in the II column of each section are arranged with a predetermined interval so that the presence or absence of the barcode is alternately repeated in the reading direction indicated by the arrow in the drawing. In the cuff 20A according to the present embodiment, the position mark is written in octal one-digit bit display, and the barcodes included in the II column are arranged every other bit.

The position information of the second tightening belt 32 at the start position of each section is the position of the tightening belts 31 and 32 from the first tightening belt 31 corresponding to the position where the photoelectric sensors 71A and 71B are provided to the corresponding portion. Shows the length. Therefore, the length indicated by the bar code 74 corresponds to the circumferential length of the fastening belts 31 and 32. Therefore, in the state where the cuff 20A is fitted to the subject's upper arm without any gap using the above-described tightening length adjusting mechanism 50 and the tightening force detecting mechanism, the length detected by the upper arm circumference measuring unit is the subject. Represents the perimeter of the upper arm.

As described above, in the cuff 20A according to the present embodiment, the cuff main body 30 is wound around the upper arm when the second fastening belt 32 is wound around the winding roller 58, so that the photoelectric sensor 71A, 71B reads the barcode 74 along the reading direction indicated by the arrow in the drawing. At that time, the information on the presence / absence of the barcode included in the I column detected by the photoelectric sensor 71A and the information on the presence / absence of the barcode included in the II column detected by the photoelectric sensor 71B are synchronized, and the upper arm circumference length is synchronized. Input to the measurement circuit 72.

The upper arm circumference measurement circuit 72 determines the timing for recognizing information detected by the photoelectric sensor 71A as position information based on the information detected by the photoelectric sensor 71B among the input information. Then, the upper arm perimeter measurement circuit 72 extracts information related to the position mark from the information detected by the photoelectric sensor 71A by associating the information detected by the photoelectric sensor 71A with the above-described timing, and based on the position mark. Specify location information. As a result, the upper arm perimeter measuring circuit 72 detects the tightening length of the tightening belts 31 and 32 to identify the upper arm perimeter of the subject. As described above, the circumference of the upper arm of the subject is automatically measured by the upper arm circumference measurement unit.

FIG. 7 is a flowchart showing a processing procedure of the sphygmomanometer according to the present embodiment, and FIG. 8 is a timing chart showing the operation state and the operation state of each part of the sphygmomanometer according to the present embodiment in time series. FIG. 9 is a schematic diagram for explaining the mounting operation for mounting the cuff of the sphygmomanometer in the present embodiment on the upper arm, and FIG. 10 shows the mounting of the cuff of the sphygmomanometer in the present embodiment on the upper arm. It is sectional drawing of a mounting state. Next, referring to FIG. 7 to FIG. 10, the processing procedure of the sphygmomanometer 1A in the present embodiment is the same as the operation status and operating state of each part of the sphygmomanometer 1A, the wearing work of the cuff 20A, the wearing of the cuff 20A. It will be described together with the later state. The program according to the flowchart shown in FIG. 7 is stored in advance in the memory unit 12 shown in FIG. 2, and the control unit 11 reads out the program from the memory unit 12 and executes the program, so that the process proceeds.

First, as shown in FIG. 7, when the test subject operates the operation unit 16 of the sphygmomanometer 1A to input a power-on command, power as a power source is supplied from the power supply unit 18 to the control unit 11. The controller 11 is driven to initialize the sphygmomanometer 1A (step S101). As shown in FIG. 8, at the time t0 when the sphygmomanometer 1A is initialized, the geared motor 51, the electromagnetic brake 52, the pressurizing pump 61, and the photoelectric sensor 71 are all in an off state in which the operation is stopped. The exhaust valve 62 is in an open state so that the space inside the air bag 35 communicates with the outside so that the cuff pressure is equal to the atmospheric pressure, and the cuff pressure detected by the pressure sensor 63 shows the same value as the atmospheric pressure. It will be.

Next, as shown in FIG. 9, the subject holds the handle 42 of the cuff 20 </ b> A with the right hand 100 and holds the handle 42 toward the hollow opening of the cuff body 30 of the cuff 20 </ b> A in the direction of arrow C in the figure. The left hand 200 which is a different hand from the right hand 100 is inserted. Then, the cuff 20A is moved to the upper arm of the left hand 200, and the handle 42 is provided on the handle 42 with the thumb 101 of the right hand 100, which is the hand holding the handle 42, while maintaining the state of being attached to the upper arm of the left hand 200. Press the push button 44.

As shown in FIG. 7, the control unit 11 that has received the pressing of the push button 44 by the subject performs pre-pressurization of the air bag 35 (step S <b> 102). Specifically, as shown in FIG. 8, the control unit 11 closes the exhaust valve 62 in order to make the space inside the air bladder 35 out of communication at the time t1 when the push button 44 is pressed, Subsequently, driving of the pressurizing pump 61 is started to inject air into the air bladder 35 at time t2. And the control part 11 stops the drive of the pressurization pump 61 at the time t3 after progress of predetermined time. Here, the time for which the pressurizing pump 61 is driven is a time necessary for a predetermined amount of air to be injected into the space inside the air bladder 35. Thus, the pre-pressurization for the air bag 35 is completed (step S103).

Next, as shown in FIG. 7, the control unit 11 drives the photoelectric sensor 71 to start detecting the tightening length of the tightening belts 31 and 32 (step S104). Specifically, as shown in FIG. 8, the control unit 11 drives the photoelectric sensor 71 at time t <b> 4 after the pressurization pump 61 stops, and the photoelectric sensor of the barcode 74 provided on the second tightening belt 32. Reading by the sensor 71 is started.

Next, as shown in FIG. 7, the control unit 11 starts the tightening operation of the cuff 20A with respect to the upper arm (step S105). At that time, the control unit 11 determines whether or not the cuff 20A has been tightened with respect to the upper arm in a predetermined tightening state (step S106), and when the predetermined tightening state is not achieved (NO in step S106). Continues the tightening operation of the cuff 20A with respect to the upper arm, and when the predetermined tightening state is reached (YES in step S106), the tightening operation of the cuff 20A with respect to the upper arm is stopped (step S107).

Specifically, as shown in FIG. 8, the control unit 11 starts the winding operation of the second tightening belt 32 by the winding roller 58 by rotationally driving the geared motor 51 in the forward direction at time t5. Let Then, the control unit 11 detects the cuff pressure of the air bladder 35 during the winding operation by the pressure sensor 63, and the forward direction of the geared motor 51 at time t6 when the detected cuff pressure reaches a predetermined threshold value. At the same time, the electromagnetic brake 52 is driven to stop the rotation of the take-up roller 58. Here, the threshold value is determined in advance based on the tightening force of the cuff 20A with respect to the upper arm suitable for blood pressure value measurement.

Here, as shown in FIG. 10, when the cuff 20A is fastened to the upper arm 202 with the optimum tightening force, the air bag 35 is reliably pressed against the upper arm 202 by the fastening belts 31 and 32. Become. Therefore, in the subsequent measurement operation, the air bag 35 is inflated, so that the upper arm 202 is surely compressed by the cuff 20A, and the artery located inside the upper arm 202 can be reliably blocked. Note that the tightening length of the tightening belts 31 and 32 in this state is determined as the perimeter of the upper arm by the upper arm perimeter measuring circuit 72, and the determined upper arm perimeter is input to the control unit 11. The control unit 11 outputs the input upper arm circumference to the memory unit 12, and the memory unit 12 temporarily stores the input upper arm circumference.

Next, as shown in FIG. 7, the control unit 11 stops driving the photoelectric sensor 71 and ends the detection of the tightening length (step S108). Specifically, as shown in FIG. 8, the control unit 11 stops driving the photoelectric sensor 71 at time t <b> 7 and ends reading of the barcode 74 provided on the second tightening belt 32 by the photoelectric sensor 71. To do.

Next, as shown in FIG. 7, the control unit 11 determines whether or not the measured upper arm circumference is within a predetermined applicable range of the cuff 20 </ b> A (step S <b> 109). . That is, the control unit 11 determines whether or not the measurement result when the blood pressure value is measured using the cuff 20A is the size of the upper arm within a range in which the accuracy can be ensured. When the control unit 11 determines that the measured upper arm perimeter is within a predetermined applicable range of the cuff 20A (YES in step S109), the control unit 11 proceeds to step S110. When it is determined that the measured upper arm perimeter is not within a predetermined range of the applicable range of the cuff 20A (NO in step S109), the process proceeds to step S115.

If it is determined YES in step S109, as shown in FIG. 7, the control unit 11 starts pressurization of the air bladder 35 for blood pressure measurement (step S110). Specifically, as shown in FIG. 8, the control unit 11 drives the pressurizing pump 61 to increase the cuff pressure at time t8, and pressurizes the air bladder 35 so as to obtain a predetermined cuff pressure. .

Next, as shown in FIG. 7, the control unit 11 starts the slow depressurization of the air bladder 35 for blood pressure measurement (step S111). Specifically, as shown in FIG. 7, the control unit 11 stops driving the pressure pump 61 at time t <b> 9 when the pressure sensor 63 detects that the internal pressure of the air bladder 35 has reached a predetermined internal pressure. Thereafter, the exhaust valve 62 is gradually opened while controlling the opening amount of the exhaust valve 62. At that time, the control unit 11 acquires the fluctuation of the cuff pressure detected by the pressure sensor 63.

Next, as shown in FIG. 7, the control unit 11 calculates a blood pressure value based on the variation of the cuff pressure obtained in the slow depressurization process (step S112). Subsequently, the control unit 11 outputs the blood pressure value obtained in step S112 to the memory unit 12 and the display unit 14, and the memory unit 12 stores the blood pressure value as a measurement result (step S113). The blood pressure value as the measurement result is displayed (step S114). Here, the display unit 14 displays the systolic blood pressure value and the diastolic blood pressure value as numerical values, for example.

If NO is determined in step S109, or if step S114 is completed, as shown in FIG. 7, the control unit 11 opens the air bag 35 (step S115) and the cuff 20A with respect to the upper arm 202. A tightening release operation is performed (step S116). Specifically, as shown in FIG. 8, the control unit 11 completely opens the exhaust valve 62 at time t <b> 10 when the calculation of the blood pressure value ends, exhausts the air in the air bladder 35 to the outside, and then At time t11, the operation of the electromagnetic brake 52 is stopped, and at time t12, the geared motor 51 is rotationally driven in the reverse direction, and the second tightening belt 32 is sent from the winding roller 58. Thereafter, the control unit 11 stops driving the geared motor 51 at time t13 when the second tightening belt 32 is completely delivered from the take-up roller 58. Thereafter, the sphygmomanometer 1 </ b> A enters a standby state, and waits for an input of a power-off command from the operation unit 16 of the subject, and stops supplying power as a power source.

In the sphygmomanometer 1 </ b> A according to the present embodiment described above, the bar code 74 as the marker provided on the second fastening belt 32 and the photoelectric sensor 71 as the reading unit provided on the base 41 are used. It becomes possible to accurately measure the perimeter of the upper arm 202 as a measurement site to which 20A is attached. In general, a photoelectric sensor is very small. Therefore, if the above configuration is adopted, a cuff capable of automatically measuring the circumference of the upper arm can be made small and simple. Further, the barcode as a marker indicating the position information can be simply configured by attaching an encoder strip to a predetermined position of the fastening belt, and the apparatus configuration is not complicated and the apparatus is not enlarged.

Further, in the sphygmomanometer 1A according to the present embodiment, the geared motor 51, the electromagnetic brake 52, the take-up roller 58, and the like as the tightening length adjusting mechanism 50 are housed in the base 41 of the handle portion 40. The cuff 20A can be made small and compact.

Further, in sphygmomanometer 1A according to the present embodiment, grip 42 provided on cuff 20A is held by left hand 200, which is different from right hand 100 to which cuff 20A is attached, and cuff 20A is hollow in this state. The left hand 200 to which the cuff 20A is attached is inserted into the opening, the cuff 20A is directed to the upper arm 202, and then the push button 44 provided on the handle 42 is pressed down. It is possible to automatically perform the tightening operation and the upper arm circumference measurement operation thereafter. Therefore, the cuff 20A can be attached to the upper arm 202 very easily, and the upper arm perimeter can be easily obtained.

In the sphygmomanometer 1A according to the present embodiment, not only the operation of attaching the cuff 20A but also the blood pressure measurement operation performed thereafter, and the tightening release operation for the upper arm 202 of the cuff 20A performed after the measurement operation. Are automatically and continuously performed. Therefore, by adopting the above configuration, it is possible to obtain a sphygmomanometer that is very convenient and can be attached to the cuff 20A, measured the blood pressure value, and removed the cuff 20A by a so-called one-touch operation.

Furthermore, in the sphygmomanometer 1A in the above-described embodiment, the measured upper arm circumference is within the applicable range of the cuff 20A (that is, the blood pressure value is measured using the cuff 20A). In such a case, the control unit 11 determines whether the accuracy of the blood pressure value as the measurement result is within a range in which the measurement result can be ensured, so that the measured upper arm circumference is within the applicable range. When it is determined that the blood pressure value is measured, the blood pressure value is measured thereafter. When it is determined that the measured upper arm circumference is outside the applicable range, the operation is immediately terminated. It is configured as follows. Therefore, when the size of the upper arm of the subject is outside the applicable range, the blood pressure value is not measured in the first place, so blood pressure that does not provide the subject with inaccurate measurement results. It can be a total.

Further, in the sphygmomanometer 1A according to the present embodiment described above, when the upper arm 202 is tightened using the tightening belts 31 and 32, the tightening force with respect to the upper arm 202 of the cuff 20A is detected using a tightening force detection mechanism, Since the tightening force adjustment mechanism 50 is used to maintain the optimum tightening force, the reliable winding of the cuff 20A around the upper arm 202 is reproduced every measurement.

In the sphygmomanometer 1A in the above-described embodiment, the case where the length of each section, which is the minimum unit of the upper arm that can be measured, is 10 mm is exemplified. However, if the length of this section is made smaller, It is possible to measure the upper arm circumference more precisely. However, as the width of the bar code 74 attached to the second tightening belt 32 becomes smaller, the detection tends to be difficult. In the sphygmomanometer 1A according to the above-described embodiment, the barcode position mark included in the I column is indicated by a bit display of octal one digit, but can be measured by variously changing this. It becomes possible to widen the range or increase the measurable resolution. For example, by displaying the position mark in octal 2-digit display or octal 3-digit display, more precise measurement of the upper arm circumference can be performed. Further, it is possible to adopt a configuration in which the header and the footer are not arranged before and after the position mark in the reading direction, and even in such a configuration, a more precise measurement of the upper arm circumference can be performed.

In addition, the sphygmomanometer 1A according to the present embodiment described above includes a position mark in the barcode 74 so that the barcode 74 itself has position information in a portion to which the barcode is attached. is doing. However, when the bar code 74 is always detected from the end of the encoder strip 73 when measuring the upper arm circumference, only the II-line bar code group shown in FIG. It is also possible to adopt a configuration in which the I-line barcode group shown in FIG. When configured in this way, the upper arm circumference measuring circuit 72 counts the number of barcodes detected by the photoelectric sensor 71B, whereby the movement amount of the tightening belts 31 and 32 is detected. It is possible to specify the upper arm circumference based on the amount. Therefore, since the reading unit can be configured with only one photoelectric sensor, the apparatus configuration is simplified, and it is not necessary to provide a position mark, header, or footer, so that it is possible to improve the resolution of the upper arm circumference measurement. become.

Further, in addition to the reading unit using the photoelectric sensor 71 described above, a rotation amount detection unit represented by a rotary encoder or the like is provided in the cuff 20A, and the rotation amount (rotation angle) of the winding roller 58 is detected by the rotation amount detection unit. ) And using this to measure the tightening length of the tightening belts 31 and 32, the bar code group (that is, FIG. 6) that increases the resolution of the measurement of the upper arm circumference or indicates the timing of the measurement. It is also possible to omit the bar code group in column II shown in FIG.

Further, the position where the barcode 74 as the marker described above is provided is not limited to the fastening belts 31 and 32. For example, a roller, a gear, or the like as a rotating member that rotates with the movement of the fastening belts 31 and 32 may be separately provided, and the same barcode as the barcode 74 described above may be provided on the roller or gear. In this case, a photoelectric sensor 71 as a reading unit is disposed so as to face these rollers and gears.

Also, the marker is not necessarily a bar-shaped barcode as described above, and a plurality of markers having the same shape such as a circular shape or a triangular shape may be provided on a fastening belt, a roller, a gear, or the like.

Further, when the rotation amount detection unit represented by the above-described rotary encoder or the like is used, the above-described configuration using the barcode 74 and the photoelectric sensor 71 can be eliminated. In that case, the cuff 20A is provided with a rotating member that rotates in accordance with the movement of the tightening belts 31 and 32, and the amount of rotation of the rotating member is detected by the above-described rotation amount detection unit. What is necessary is just to set it as the structure which measures 32 movement amount. When a rotary encoder is employed as the rotation amount detection unit, the rotary encoder may be attached to the take-up roller 58 serving as a rotating member.

In the above embodiment, the upper arm circumference measured by the upper arm circumference measurement unit is used for determining whether the size of the upper arm to which the cuff 20A is attached is within the applicable range of the cuff 20A. However, the measured circumference of the upper arm can be used in various other ways. The following first and second modifications of the present embodiment show other apparatus configuration examples using the measured upper arm circumference. The configuration of the sphygmomanometer according to the first and second modified examples is mainly different from the sphygmomanometer in the present embodiment described above only in the configuration of the control unit 11, and the description thereof is omitted except for the difference. Does not repeat here.

The sphygmomanometer according to the first modification uses the upper arm circumference measured by the upper arm circumference measurement unit to determine the pressurizing condition and the depressurizing condition of the air bag 35 that is inflated and inflated for measuring the blood pressure value. is there. Specifically, in the sphygmomanometer 1A having the block configuration shown in FIG. 2, the controller 11 controls the inflating / deflating operation control unit (which controls at least one of the inflating and deflating operations of the air bladder 35 by the inflating / deflating mechanism) (Not shown). The expansion / contraction movement control unit is configured to measure the upper arm circumference measured from a plurality of expansion / contraction operation programs stored in advance in a memory unit or the like based on the information about the upper arm circumference measured from the upper arm circumference measurement circuit 72. A suitable expansion / contraction operation program is selected, and based on this, the operation of the pressurization pump 61 and / or the exhaust valve 62 is controlled via the pressurization pump drive circuit 64 and / or the exhaust valve drive circuit 65.

As the expansion / contraction operation program, for example, for a subject with a small upper arm size, a program for slowly performing a pressure operation by reducing the discharge amount per unit time of the pressure pump 61, or conversely, the size of the upper arm It is assumed that a program for performing a pressurization operation quickly by increasing the discharge amount per unit time of the pressurization pump 61 for a subject having a large pressure. The expansion / contraction operation program is, for example, a program for reducing the amount of air discharged from the air bag 35 per unit time by adjusting the opening amount of the exhaust valve 62 to be small for a subject with a small upper arm size. On the contrary, for a subject with a large upper arm size, it is assumed that the opening amount of the exhaust valve 62 is adjusted to be large and the amount of air discharged from the air bag 35 per unit time is increased. The

FIG. 11 is a flowchart showing a processing procedure of the sphygmomanometer according to the first modification. Note that the flowchart shown in FIG. 11 shows only the changes from the flowchart shown in FIG. As shown in FIG. 11, in the sphygmomanometer according to the present modification, prior to performing the processing of steps S110 to S112, which is processing for blood pressure measurement, based on the upper arm circumference information acquired in step S108, In step S109A, the pressurizing condition and / or the depressurizing condition of the air bladder 35 are determined. Specifically, the control unit 11 receives the output of the upper arm circumference measurement circuit 72 and accesses the memory unit 12 to read out the optimum expansion / contraction operation program, and is a process for blood pressure measurement performed thereafter. In S110 to S112, the expansion / contraction operation control unit included in the control unit 11 controls the operation of the pressurization pump 61 and / or the exhaust valve 62 via the pressurization pump drive circuit 64 and / or the exhaust valve drive circuit 65.

By adopting the configuration according to the first modification described above, the inflation operation and / or the contraction operation of the air bag 35 according to the size of the upper arm to which the cuff 20A is attached is realized. Thus, it becomes possible to measure the blood pressure value with higher accuracy than in the past, and it is possible to measure the blood pressure value more quickly than in the past.

The sphygmomanometer according to the second modification uses the upper arm circumference measured by the upper arm circumference measurement unit as a correction factor when calculating the blood pressure value. Specifically, in the sphygmomanometer 1A having the block configuration shown in FIG. 2, blood pressure information for correcting the blood pressure value as the measured blood pressure information to the blood pressure information measuring unit (not shown) provided in the control unit 11. A correction unit (not shown) is further provided. The blood pressure information correction unit calculates a correction coefficient based on the information on the upper arm periphery length input from the upper arm periphery length measurement circuit 72, corrects the envelope used for blood pressure value calculation using the correction coefficient, Based on this, a parameter for calculating the blood pressure value is determined. The blood pressure information measurement unit calculates a blood pressure value as a measurement result based on the determined parameter.

FIG. 12 is a flowchart showing a processing procedure of the sphygmomanometer according to the second modified example. Note that the flowchart shown in FIG. 12 shows only the changes from the flowchart shown in FIG. As shown in FIG. 12, in the sphygmomanometer according to the present modification, step S111A is performed based on the upper arm circumference information acquired in step S108 prior to performing the process of step S112, which is a process for calculating the blood pressure value. In S111C, the correction process for calculating the blood pressure value described above is performed. Specifically, a correction coefficient is calculated based on the upper arm circumference measurement information input from the upper arm circumference measurement circuit 72 in step S111A, and an envelope used for blood pressure value calculation using the correction coefficient in step S111B. The line is corrected, and a parameter for calculating the blood pressure value is determined based on the envelope line corrected in step S111C.

By adopting the configuration according to the second modification described above, a necessary correction is added to the measured blood pressure value according to the size of the upper arm to which the cuff 20A is attached. For example, in general, when a subject whose upper arm size is large measures a blood pressure value, the measured blood pressure value tends to be higher than the actual blood pressure. High-precision blood pressure measurement is possible.

In addition, a sphygmomanometer according to a third modification of the present embodiment shown below uses a bar code 74 provided on the second fastening belt 32 and a photoelectric sensor 71 provided on the base 41 to It is the example comprised so that operation | movement control of the fastening length adjustment mechanism at the time of fastening cancellation | release operation might be performed. When a configuration such as the sphygmomanometer 1A in the present embodiment described above is employed, it is preferable to configure the cuff 20A so that its circumferential length always returns to the same length after use. Therefore, in the sphygmomanometer according to the present modification, the operation control of the tightening length adjusting mechanism during the tightening release operation of the cuff 20A using the upper arm circumference measuring unit including the barcode 74 and the photoelectric sensor 71 as described above. By performing the above, the return of the length of the cuff 20A in the circumferential direction to the initial length is realized.

FIG. 13 is a flowchart showing the processing procedure of the sphygmomanometer according to the third modification. Note that the flowchart shown in FIG. 13 shows only the changes from the flowchart shown in FIG. As shown in FIG. 13, in the sphygmomanometer according to this modification, after opening the air bladder 35 in step S115, the operation of the electromagnetic brake 52 is stopped in step S116A and the geared motor 51 is rotated in the reverse direction. By releasing the second tightening belt 32 from the winding roller 58, the tightening releasing operation of the cuff 20A is started. At that time, the control unit 11 determines whether or not the circumferential length of the cuff 20A has returned to the pre-stored initial length based on the position information detected by the upper arm circumference measurement unit (Step S11). S116B) If it is not determined that it has returned (NO in step S116B), the cuff 20A continues to be tightened and if it is determined that it has returned (YES in step S116B), the cuff 20A The tightening release operation is stopped (step S116C).

By adopting the configuration according to the third modification described above, the circumferential length of the cuff 20A is always restored to the same length after use, so that the circumference of the upper arm is changed every time it is used. The length can be reliably measured with high accuracy.

(Embodiment 2)
FIG. 14 is a diagram showing a functional block configuration of the sphygmomanometer according to the second embodiment of the present invention. First, with reference to FIG. 14, the structure of the functional block of the sphygmomanometer 1B in the present embodiment will be described. The blood pressure monitor 1B in the present embodiment is the same in appearance as the blood pressure monitor 1A in the above-described first embodiment, and most of the functional blocks have a common configuration. Therefore, portions similar to those in the first embodiment described above are denoted by the same reference numerals in the drawing, and the description thereof will not be repeated here.

The sphygmomanometer 1A according to the first embodiment uses the air bag 35 and the air system component 60 as a tightening force detection mechanism for detecting the tightening force of the tightening belts 31 and 32 with respect to the upper arm 202, and the tightening force is used as the air bag 35. It was configured to be understood as internal pressure. On the other hand, the sphygmomanometer 1B according to the present embodiment is added to the take-up roller 58 around which the second tightening belt 32 is wound as a tightening force detection mechanism for detecting the tightening force of the tightening belts 31 and 32 with respect to the upper arm 202. By using a torque sensor that detects rotational torque, the tightening force is regarded as rotational torque applied to the winding roller 58.

As shown in FIG. 14, in the sphygmomanometer 1B according to the present embodiment, a torque sensor 59 is provided in the cuff 20B. The torque sensor 59 is a means for detecting rotational torque applied to the take-up roller 58, and is attached to, for example, a shaft 57a (see FIG. 5) to which the take-up roller 58 is fixed.

FIG. 15 is a flowchart showing the processing procedure of the sphygmomanometer in the present embodiment, and FIG. 16 is a timing chart showing the operation status and the operating state of each part of the sphygmomanometer in the present embodiment in time series. Next, with reference to these FIG. 15 and FIG. 16, the processing procedure of the sphygmomanometer 1B in the present embodiment will be described together with the operating states and operating states of the respective parts of the sphygmomanometer 1B. Note that the program according to the flowchart shown in FIG. 15 is stored in advance in the memory unit 12 shown in FIG. 14, and the control unit 11 reads out the program from the memory unit 12 and executes the program.

First, as shown in FIG. 15, when the test subject operates the operation unit 16 of the sphygmomanometer 1 </ b> B and inputs a power-on command, power as a power source is supplied from the power supply unit 18 to the control unit 11. Control unit 11 is driven to initialize sphygmomanometer 1B (step S201). As shown in FIG. 16, at the time t0 when the sphygmomanometer 1B is initialized, the geared motor 51, the electromagnetic brake 52, the pressure pump 61, and the photoelectric sensor 71 are all in an off state in which the operation is stopped. The rotational torque detected by the torque sensor 59 is almost zero, and the exhaust valve 62 is open to communicate the space inside the air bladder 35 with the outside to make the cuff pressure equal to the atmospheric pressure. The cuff pressure detected by 63 shows the same value as the atmospheric pressure.

Next, as shown in FIG. 15, the control unit 11 drives the photoelectric sensor 71 to start detecting the tightening length of the tightening belts 31 and 32 (step S202). Specifically, as shown in FIG. 16, the control unit 11 drives the photoelectric sensor 71 at time t <b> 1 after the end of initialization, and the photoelectric sensor 71 of the barcode 74 provided on the second fastening belt 32. Start reading.

Next, the subject grips the handle 42 of the cuff 20B with the right hand 100 and grips the handle 42 toward the hollow opening of the cuff main body 30 of the cuff 20B, as in the case of the first embodiment described above. The left hand 200, which is a different hand from the right hand 100, is inserted (see FIG. 9). Then, the cuff 20B is moved to the upper arm of the left hand 200, and the handle 42 is provided on the handle 42 with the thumb 101 of the right hand 100, which is the hand holding the handle 42, while maintaining the state of being in contact with the upper arm of the left hand 200. Press the push button 44.

As shown in FIG. 15, the control unit 11 that has received the pressing of the push button 44 by the subject starts the tightening operation of the cuff 20B with respect to the upper arm (step S203). At that time, the control unit 11 determines whether or not the cuff 20B has been tightened with respect to the upper arm in a predetermined tightening state (step S204), and when it is not in the predetermined tightening state (NO in step S204). Continues the tightening operation of the cuff 20B with respect to the upper arm and stops the tightening operation of the cuff 20B with respect to the upper arm when the predetermined tightening state is reached (YES in step S204) (step S205).

Specifically, as shown in FIG. 16, the control unit 11 starts the winding operation of the second tightening belt 32 by the winding roller 58 by rotationally driving the geared motor 51 in the forward direction at time t2. Let Then, the control unit 11 detects the rotational torque applied to the winding roller 58 during the winding operation by the torque sensor 59, and at time t3 when the detected rotational torque reaches a predetermined threshold value, the geared motor 51 The forward rotation is stopped, and at the same time, the electromagnetic brake 52 is driven to stop the winding roller 58 from rotating. Here, the threshold value is determined in advance based on the tightening force of the cuff 20B on the upper arm suitable for blood pressure value measurement.

Here, as in the case of the first embodiment described above, when the cuff 20B is fastened to the upper arm 202 with the optimum tightening force, the air bag 35 is securely attached to the upper arm 202 by the fastening belts 31 and 32. It will be in the state pressed (refer FIG. 10). Therefore, in the subsequent measurement operation, the air bag 35 is inflated, so that the upper arm 202 is surely compressed by the cuff 20B, and the artery located inside the upper arm 202 can be surely blocked. Note that the tightening length of the tightening belts 31 and 32 in this state is determined as the perimeter of the upper arm by the upper arm perimeter measuring circuit 72, and the determined upper arm perimeter is input to the control unit 11. The control unit 11 outputs the input upper arm circumference to the memory unit 12, and the memory unit 12 temporarily stores the input upper arm circumference.

Next, as shown in FIG. 15, the control unit 11 stops driving the photoelectric sensor 71 and ends the detection of the tightening length (step S206). Specifically, as shown in FIG. 16, the control unit 11 stops driving the photoelectric sensor 71 at time t <b> 4 and ends reading of the barcode 74 provided on the second fastening belt 32 by the photoelectric sensor 71. To do.

Next, as shown in FIG. 15, the control unit 11 determines whether or not the measured upper arm circumference is within a predetermined applicable range of the cuff 20 </ b> B (step S <b> 207). . That is, the control unit 11 determines whether or not the measurement result when the blood pressure value is measured using the cuff 20B is the size of the upper arm within a range in which the accuracy can be ensured. When the control unit 11 determines that the measured upper arm circumference is within a predetermined applicable range of the cuff 20B (YES in step S207), the control unit 11 proceeds to step S208. When it is determined that the measured upper arm perimeter is not within a predetermined range of the applicable range of the cuff 20B (NO in step S207), the process proceeds to step S213.

Next, as shown in FIG. 15, the control unit 11 starts pressurization of the air bladder 35 for blood pressure measurement (step S208). Specifically, as shown in FIG. 16, the control unit 11 closes the exhaust valve 62 in order to make the space inside the air bag 35 out of communication with the outside at time t5, and then at time t6, the air bag. In order to inject air into the air 35, driving of the pressurizing pump 61 is started to increase the cuff pressure, and the air bag 35 is pressurized so as to become a predetermined cuff pressure.

Next, as shown in FIG. 15, the control unit 11 starts the slow depressurization of the air bladder 35 for blood pressure measurement (step S209). Specifically, as shown in FIG. 16, the control unit 11 stops driving the pressure pump 61 at time t7 when the pressure sensor 63 detects that the internal pressure of the air bladder 35 has reached a predetermined internal pressure. Thereafter, the exhaust valve 62 is gradually opened while controlling the opening amount of the exhaust valve 62. At that time, the control unit 11 acquires the fluctuation of the cuff pressure detected by the pressure sensor 63.

Next, as shown in FIG. 15, the control unit 11 calculates a blood pressure value based on the variation of the cuff pressure obtained in the slow depressurization process (step S210). Subsequently, the control unit 11 outputs the blood pressure value obtained in step S210 to the memory unit 12 and the display unit 14, and the blood pressure value is stored as a measurement result in the memory unit 12 (step S211). The blood pressure value as the measurement result is displayed (step S212). Here, the display unit 14 displays the systolic blood pressure value and the diastolic blood pressure value as numerical values, for example.

If NO is determined in step S207, or if step S212 is completed, as shown in FIG. 15, the control unit 11 opens the air bag 35 (step S213) and the cuff 20B with respect to the upper arm 202. A tightening release operation is performed (step S214). Specifically, as shown in FIG. 16, the control unit 11 completely opens the exhaust valve 62 at time t8 when the calculation of the blood pressure value is finished, exhausts the air in the air bag 35 to the outside, and then At time t9, the operation of the electromagnetic brake 52 is stopped, and at time t10, the geared motor 51 is rotationally driven in the reverse direction, and the second tightening belt 32 is sent from the winding roller 58. Thereafter, the control unit 11 stops driving the geared motor 51 at time t11 when the second tightening belt 32 is completely delivered from the take-up roller 58. Thereafter, the sphygmomanometer 1B is in a standby state, and waits for an input of a power-off command from the operation unit 16 of the subject, and stops supplying power as a power source.

Even when the sphygmomanometer 1B as described above is used, the same effect as that obtained when the sphygmomanometer 1A in the first embodiment described above can be obtained.

In the above-described sphygmomanometers 1A and 1B according to the first and second embodiments of the present invention, the winding operation operation unit for starting the winding operation of the second tightening belt 32 is configured by the push button 44. However, it is not always necessary to configure the winding operation operation unit with a push button, and it is configured with a slide type button, a dial type button, a touch sensor, a voice recognition sensor, or the like. Also good. Further, the position at which the winding operation operation unit is provided is not limited to the position at which the handle unit 40 can be operated with the thumb, but may be provided at another position of the handle unit 40 or the main body 10.

In sphygmomanometers 1A and 1B according to Embodiments 1 and 2 of the present invention described above, the cuff upper arm tightening operation, the blood pressure value measuring operation performed after the tightening operation, and the cuff performed after the measuring operation are performed. Although the description has been given by exemplifying the case where the tightening release operation with respect to the upper arm is automatically performed continuously, it is necessary to configure so that all of these series of operations are automatically performed continuously. It is not always necessary, and each operation may be sequentially performed based on the operation of the operation unit.

In the first and second embodiments of the present invention described above, the case where the non-wearing part is the upper arm of the left hand and the hand holding the handle is the right hand has been described as an example. It is also possible to use the part as the upper arm of the right hand and the left hand as the hand holding the handle. In the first and second embodiments described above, a so-called upper arm type sphygmomanometer cuff that is attached to the upper arm when measuring blood pressure values has been described as an example of the sphygmomanometer cuff. The present invention is not limited to this, such as a so-called wrist-type sphygmomanometer cuff that is worn on the wrist when measuring blood pressure values, or a so-called ankle-type sphygmomanometer cuff that is worn on the ankle when measuring blood pressure values. Of course, the invention can also be applied.

Further, in the first and second embodiments of the present invention described above, the case where the present invention is applied to a sphygmomanometer in which the main body and the cuff are separated has been described as an example. Naturally, it is also possible to apply the present invention to a sphygmomanometer integrated with and.

In the first and second embodiments of the present invention described above, the case where the present invention is applied to a sphygmomanometer capable of measuring a systolic blood pressure value and a diastolic blood pressure value has been described as an example. The present invention can also be applied to a blood pressure information measuring device capable of measuring blood pressure information other than blood pressure values and diastolic blood pressure values.

As described above, the above-described embodiments and modifications thereof disclosed herein are illustrative in all respects and are not restrictive. The technical scope of the present invention is defined by the scope of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1A, 1B Blood pressure monitor, 10 main body, 11 control unit, 12 memory unit, 14 display unit, 16 operation unit, 18 power supply unit, 20A, 20B cuff, 30 cuff main unit, 31 first tightening belt, 31a one end, 31b other end, 32 second clamping belt, 32a one end, 32b other end, 33 exterior cover, 34 curler, 34a cut, 35 air bag, 40 handle part, 41 base part, 42 handle, 44 push button, 46 Support frame, 50 tightening length adjustment mechanism, 51 geared motor, 51a motor part, 51a1 rotating shaft, 51b deceleration part, 51c output shaft, 52 electromagnetic brake, 53 motor drive circuit, 54 electromagnetic brake drive circuit, 55, 56, 57 Gear, 56a, 57a shaft, 58 take-up roller, 59 ton Sensor, 60 air system components, 61 pressure pump, 62 exhaust valve, 63 pressure sensor, 64 pressure pump drive circuit, 65 exhaust valve drive circuit, 66 amplifier, 67 A / D conversion circuit, 71, 71A, 71B photoelectric sensor 72, upper arm circumference measurement circuit, 73 encoder strip, 74 bar code, 90 air tube, 92 connection cable, 100 right hand, 101 thumb, 200 left hand, 202 upper arm.

Claims (12)

1. It includes a fluid bag (35) for compressing the measurement site and a tightening belt (31, 32) wound around the fluid bag (35), has no cut in the circumferential direction, and is covered from the axial direction. An annular cuff configured to allow insertion of a measurement site;
   An expansion / contraction mechanism (61, 62) for expanding and contracting the fluid bag (35);
   A blood pressure information measuring unit for measuring blood pressure information using the fluid bag (35);
   A tightening length adjusting mechanism (50) that variably adjusts the tightening length of the tightening belt (31, 32) with respect to the measurement site;
   A blood pressure information measurement device comprising a circumference measurement unit that measures the circumference of a measurement site.
2. The perimeter measuring unit measures the amount of movement of the tightening belt (31, 32) when the tightening belt (31, 32) is fastened and fixed to the measurement site using the tightening length adjusting mechanism (50). The blood pressure information measuring device according to claim 1, wherein the peripheral length of the part to be measured is measured.
3. The perimeter measuring unit includes a marker provided on the tightening belt (31, 32) and a reading unit for reading the marker, and the tightening belt (31, 32) based on information read by the reading unit. The blood pressure information measurement device according to claim 2, wherein the movement amount is measured.
4. The marker is a barcode (74);
   The blood pressure information measuring device according to claim 3, wherein the reading unit is a photo interrupter (71) for reading the barcode (74).
5. The perimeter measuring unit includes a rotating member that rotates as the fastening belts (31, 32) move, and a rotation amount detecting unit that detects a rotation amount of the rotating member, and is detected by the rotation amount detecting unit. The blood pressure information measuring device according to claim 2, wherein the movement amount of the tightening belt (31, 32) is measured based on the obtained information.
6. 2. The blood pressure information correction unit according to claim 1, further comprising a blood pressure information correction unit that corrects blood pressure information measured by the blood pressure information measurement unit based on the circumference length information of the measurement site detected by the circumference measurement unit. Blood pressure information measuring device.
7. Inflation / deflation for controlling at least one of the inflating and deflating operations of the fluid bag (35) by the inflating / deflating mechanism (61, 62) based on the perimeter information of the measurement site detected by the perimeter measuring unit The blood pressure information measurement device according to claim 1, further comprising an operation control unit.
8. The apparatus further comprises a determination unit that determines whether or not the circumference of the measurement site is within a predetermined measurable range based on the circumference information of the measurement site detected by the circumference measurement unit. The blood pressure information measuring device according to claim 1,
9. The tightening length adjusting mechanism (50) rotates the wind-up roller (58) capable of winding and feeding the tightening belt (31, 32) and the wind-up roller (58) in the forward direction and the reverse direction. The blood pressure information according to claim 1, comprising: an electric motor (51) to be driven; and a brake (52) that applies a braking force to the winding roller (58) when the electric motor (51) is stopped. measuring device.
10. The cuff includes a cylindrical cuff main body portion (30) including the fluid bag (35) and the fastening belts (31, 32), and a handle portion provided on an outer peripheral surface of the cuff main body portion (30) ( 40). The blood pressure information measuring device according to claim 1, further comprising:
11. A winding operation unit (44) for receiving a command to start the winding operation of the tightening belt (31, 32) by the winding roller (58) is provided in the handle unit (40). The blood pressure information measuring device according to claim 10.
12. The cuff further includes a flexible member (34) configured to be elastically deformable in a radial direction outside the fluid bag (35) and inside the tightening belt (31, 32). The blood pressure information measuring device according to claim 1,

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