A single-arm micro air-pressure pump device, having an air pump body and a driving unit. The air pump body includes a supporting frame, an air chamber unit coupled to a side of the supporting frame, and a swing arm provided on the air chamber unit. The driving unit is fixed on the supporting frame and has an output shaft. The output shaft is provided with an eccentric shaft and is configured to rotate the eccentric shaft, and the eccentric shaft has an end coupled to the output shaft and an opposite end coupled to the swing arm in order to drive the swing arm into a reciprocating motion between at least a proximal position and a distal position with respect to the air chamber unit. The reciprocating motion pushes a piston unit provided on one end of the swing arm and causes the air output.

A single-arm micro air-pressure pump device, having an air pump body and a driving unit. The air pump body includes a supporting frame, an air chamber unit coupled to a side of the supporting frame, and a swing arm provided on the air chamber unit. The driving unit is fixed on the supporting frame and has an output shaft. The output shaft is provided with an eccentric shaft and is configured to rotate the eccentric shaft, and the eccentric shaft has an end coupled to the output shaft and an opposite end coupled to the swing arm in order to drive the swing arm into a reciprocating motion between at least a proximal position and a distal position with respect to the air chamber unit. The reciprocating motion pushes a piston unit provided on one end of the swing arm and causes the air output.

A blood pressure measurement method includes wrapping a cuff around a site. The cuff includes: a first bladder that swells due to receiving fluid and is arranged at an outer surface of the site that corresponds to a first half surface where an artery is; and a second bladder that swells due to receiving fluid and is arranged at the outer circumferential surface of the measurement site that corresponds to a second half surface opposite to the first half surface. During inflation, the pressure of the second bladder is made larger than the first bladder by supplying more fluid such that the stroke amount by which the second fluid bladder swells is larger in the thickness direction. Then, the two bladders are inflated at equal rates. In the process of inflating, or in the process of deflating at rates equal to each other after inflating, blood pressure is measured.

A blood pressure monitor cuff is formed by stacking an outer circumferential layer arranged on a side opposite to that of a measurement site and a fluid bladder arranged on the measurement site side. The outer circumferential layer and the fluid bladder are formed of an elastomer material. Two edge portions in a lengthwise direction of the outer circumferential layer protrude in a thickness direction toward the measurement site. The fluid bladder includes a base layer that opposes the outer circumferential layer and a top layer overlapping with the base layer, and the edge portions of the base layer and the top layer are welded together forming a bladder shape. Additional sheets are welded in the thickness direction to the welded edge portions of the top layer and the base layer. The fluid bladder is arranged between the two edge portions of the outer circumferential layer in the width direction.

A fluid control apparatus includes a piezoelectric pump and valve. The valve includes a second valve housing, second seal member, diaphragm, first seal member, and first valve housing and has a structure in which they are laminated in sequence. The first valve housing includes a second vent and third vent, has a valve seat, and includes six cavities. The second valve housing has a first vent and first vent and includes a valve seat and six first protrusions. The second valve housing further includes six second protrusions nearer the outer edges than the six first protrusions, as seen in the x-axis direction in plan view.

A fluid control apparatus includes a piezoelectric pump and valve. The valve includes a second valve housing, second seal member, diaphragm, first seal member, and first valve housing and has a structure in which they are laminated in sequence. The first valve housing includes a second vent and third vent, has a valve seat, and includes six cavities. The second valve housing has a first vent and first vent and includes a valve seat and six first protrusions. The second valve housing further includes six second protrusions nearer the outer edges than the six first protrusions, as seen in the x-axis direction in plan view.

A vital information measuring apparatus according to an aspect of the present invention is a vital information measuring apparatus for measuring vital information by compressing a measurement site of a subject with a cuff, and includes a fluid supply unit configured to supply a fluid to the cuff, and a first fluid supply controller configured to control, when a situation of the subject satisfies a first condition in which measurement of the vital information is recommended, a supply of the fluid to the cuff by the fluid supply unit to compress the measurement site in a first compression mode for informing the subject that the first condition is satisfied.

A vital information measuring apparatus according to an aspect of the present invention is a vital information measuring apparatus for measuring vital information by compressing a measurement site of a subject with a cuff, and includes a fluid supply unit configured to supply a fluid to the cuff, and a first fluid supply controller configured to control, when a situation of the subject satisfies a first condition in which measurement of the vital information is recommended, a supply of the fluid to the cuff by the fluid supply unit to compress the measurement site in a first compression mode for informing the subject that the first condition is satisfied.

The present invention provides a system for measurement of blood pressure by detecting the Korotkoff sound. The system comprises an arm band placed on the brachial artery of the user and pressure is applied to the artery by inflating the cuff through an inflation pump provided in a measurement unit, thereby forcing the artery to close. Further, the pressure is reduced by opening at least one valve and by reducing the pressure the Korotkoff sounds are detected using the ausculatory blood pressure monitoring component placed in pneumatic pathway of cuff. The acoustic sound is detected in the audible range of 20 Hz to 10 KHz and also ultrasonic range between 60 KHz to 80 Khz. In this range the signal to noise ratio is maximal. The method for detecting the blood pressure through the present system enhances acoustic signal detection that improves blood pressure measurement accuracy.

The present invention provides a system for measurement of blood pressure by detecting the Korotkoff sound. The system comprises an arm band placed on the brachial artery of the user and pressure is applied to the artery by inflating the cuff through an inflation pump provided in a measurement unit, thereby forcing the artery to close. Further, the pressure is reduced by opening at least one valve and by reducing the pressure the Korotkoff sounds are detected using the ausculatory blood pressure monitoring component placed in pneumatic pathway of cuff. The acoustic sound is detected in the audible range of 20 Hz to 10 KHz and also ultrasonic range between 60 KHz to 80 Khz. In this range the signal to noise ratio is maximal. The method for detecting the blood pressure through the present system enhances acoustic signal detection that improves blood pressure measurement accuracy.