JPH06125882A - Fingertip pulse wave sensor with blood pressure measuring function - Google Patents

Abstract

PURPOSE:To enable the measurement of a blood pressure as well even at the finger set for the purpose of measuring the fingertip pulse waves. CONSTITUTION:A finger setting base 10 of a stationary type to be set with the finger is divided to a base part 10a and a swing type moving part 10b which is hinged at the bottom end to the base part thereof and is formed with a fingertip body setting surface 11 atop the moving part. A spring 28 supporting the moving part 10b in the state in contact with the base part 10a between these parts. The moving part 10b is provided with a nail contact part 15 having a nail contact surface 14 attachably and detachably facing the fingertip body setting surface 11. A cylindrical cuff 20 for a finger sphygmomanometer which pressurizes the root of the finger is disposed atop the base part 10b. A light receiving element 17 is disposed on the fingertip body setting surface 11 and a light emitting element 17a is disposed on the nail contact surface 14 so as to face the element. A fingertip stopper 13 is formed in the front position of the fingertip body setting surface 11 and the distance between the position and the rear end of the cuff 20 is set shorter than the length of the standard finger.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fingertip pulse wave sensor with a blood pressure measuring function capable of measuring blood pressure at the same time when measuring the volume pulse wave of a fingertip blood vessel.

[0002]

2. Description of the Related Art A finger sphygmograph for observing blood circulation in peripheral blood vessels and evaluating blood circulation function is well known, and blood circulation can be evaluated with high accuracy. Further, according to a so-called acceleration sphygmograph that secondarily differentiates the pulse wave signal to analyze the waveform, a higher evaluation of blood circulation can be obtained. A finger pulse wave sensor for this purpose is also known, for example, from Japanese Patent Application Laid-Open No. 2-126831.

[0003]

However, if the blood pressure value can be measured simultaneously with the analysis of the fingertip pulse wave, it becomes possible to evaluate blood circulation more effectively in consideration of both data. In view of such a point, an object of the present invention is to provide a fingertip pulse wave sensor with a blood pressure measuring function that can also measure blood pressure with a finger set to measure a fingertip pulse wave.

[0004]

In order to achieve this object, the present invention provides, according to claim 1, a stationary type finger setting base for setting a finger, wherein a base portion and a lower end portion are hinged to the base portion. In addition, it is divided into a swing type movable part having a fingertip abdomen setting surface formed on the upper surface, and a spring is provided between the base and the movable part so as to support the movable part in a contact state with the base, and a fingertip abdomen setting surface is provided. On the other hand, a claw abutting portion having a claw abutting surface that is closer to and thinner than the standard fingertip thickness so as to be separable and contactable and that is spring-biased in the approaching direction is provided on the swing-type movable portion, On the upper surface of the base, a cylindrical cuff for a finger sphygmomanometer that presses the base of the finger set on the fingertip abdomen setting surface is arranged, and the light emitting element and the other side on one side of the fingertip abdomen setting surface and the nail contact surface. The light-receiving element is placed opposite to the A fingertip stopper that abuts the tip of the fingertip is formed at one position, and the distance between the fingertip stopper and the rear end of the cuff is set shorter than the standard finger length in the contact state. To do.

According to a second aspect of the present invention, the movable part is configured as a slide type movable part which is slidably guided forward and backward by the base part of the stationary type finger set base and has a fingertip belly set surface on the upper surface. You can also

[0006]

According to the first or second aspect of the present invention, a finger is set on the stationary finger setting base, and the finger tip is placed between the finger tip abdomen setting surface and the nail contact surface of the swing or slide type nail contact portion. Intrude while separating the contact surface. Furthermore, when the fingertip is advanced, its tip comes into contact with the fingertip stopper, causing the claw contact part to swing away from the base part according to the length of the finger by swinging or sliding, and the base of the finger is also used for the finger sphygmomanometer. Set in proper position within the cylindrical cuff. The fingertip volume pulse wave is detected by the light emitting element and the light receiving element on the fingertip abdomen setting surface and the nail contact surface,
Then, the finger is pressed by the cuff with the set state, and blood pressure is measured.

[0007]

1 to 4 show a fingertip pulse wave sensor with a blood pressure measuring function according to an embodiment of the present invention. In these figures, 10 is a stationary finger set base of a fingertip pulse wave sensor 9 with a blood pressure measuring function that is raised against the bottom so that the palm of the hand is placed, and has a base 10a and a lower end on this base. The swing type movable part 10b is provided with a finger-tip and belly set surface 11 formed by a bracket 2 attached to the cover so as to be detachably hinged and to form an upper surface. A cylindrical cuff 2 for a finger sphygmomanometer that pressurizes a standard finger base set on the fingertip abdomen setting surface 11 on the raised surface of the base 10a.
0 is placed. This cuff is a cylindrical cuff case 2
The bag-shaped cuff main body 20b is attached to the inner periphery of 0a.

The movable portion 10b has a lower end portion hinged to the lugs 27a on both sides protruding from the bracket 27 of the base portion 10a by the pins 3 and a rotary shaft rotatably attached to the side surface of the bracket 27 of the base portion 10a. It is pulled by the outer end of a constant force mainspring 28 whose inner end is locked to 26.
A magnet 29 and an iron piece 29a are attached to the facing surfaces of the two brackets 2 and 27 as an attracting tool to attract the movable portion 10b to the base portion 10a in a contacting state.

Finger tip guide walls 12 are formed on both sides of the finger tip abdomen setting surface 11, and a finger tip stopper 13 that abuts the tip of the finger tip is formed on the front surface thereof to be lower than the height position of the nail. At the same time, a touch sensor 13a for detecting contact of the tip of the fingertip is attached to the stopper surface. Semi-circular cutout grooves for guiding a slide pipe 16 provided below a slider type claw abutting portion 15 having a claw abutting surface 14 are formed on both side walls of the fingertip guide wall 12 to allow the claw abutting to be performed. The surface 14 can be brought into and out of contact with the fingertip abdomen setting surface 11. The light receiving element 17 is arranged on the fingertip pad setting surface 11, and the nail contact surface 1
4, a light emitting element 17a is arranged so as to face it.

A constant load mainspring 19 is housed in the swing type movable part 10b, an inner end of which is locked by a rotating shaft 4 which is rotatably supported by a bracket 2, and an outer end of both slide pipes 16. Connecting rod 16a for connecting the lower ends
Is locked to. As a result, the photoelectric elements 17, 17a
The fingertip is inserted into the gap between them, and the slide pipe 16 is rewound while rotating against the winding force of the constant load mainspring 19 and slides along the optical axis according to the thickness thereof.

A light emitting element and a light receiving element for detecting a pulse wave are provided at positions facing the inner peripheral surface of the cuff 20. A touch sensor 25 for starting measurement, such as an electrostatic type or a pressure sensitive type, is attached to the rear end edge of the left intermediate region of the cylindrical cuff case 20a. Further, in the base portion 10a, the cuff 2 is mounted on the circuit board 6 and attached to the bracket 27.
A pump 21 for pressurizing 0 and a solenoid valve 22 are housed. The power supply lead wire of the light emitting element 17a is guided from inside the swing type movable portion 10b through the inside of the slide pipe 16 so as not to impair the appearance. Fingertip stopper 13
The distance between the mounting positions of the touch sensor 25 and the touch sensor 25 is
The length of the index finger is set to be shorter than the standard length of the index finger in the contact state of a and the movable portion 10b.

On the circuit board 6, in addition to the circuit attached to the touch sensor 13a or the photoelectric elements 17 and 17a, the pump 21 is operated to pressurize the cuff 20 to a predetermined cuff pressure and then the solenoid valve 22 is operated. The pressure wave is detected by the photoelectric element of the cuff 20 during the depressurization process and the pressure control circuit that exhausts rapidly when the pressure drops to a predetermined cuff pressure. And a blood pressure measuring circuit for detecting the lowest blood pressure. Such a blood pressure measuring circuit itself is well known. The fingertip pulse wave sensor 9 configured in this way is attached to the apparatus main body, supplies a fingertip pulse wave signal at the time of measurement to analyze the acceleration pulse wave and display the analysis result, and the highest and lowest values. A blood pressure signal is supplied to display the blood pressure value. The device main body starts measurement of the acceleration pulse wave when the touch sensor 25 generates the detection signal while the touch sensor 13a is generating the detection signal, and responds to the end of analysis of the acceleration pulse wave by the blood pressure measurement start signal. Is provided with a measurement start signal generating means.

At the time of measurement, as shown in FIG. 4, the index finger 1 is inserted into the cuff 20, and further the fingertip is inserted into the gap S between the fingertip abdomen setting surface 11 and the claw abutment surface 14, and the thickness thereof is adjusted. Accordingly, the claw contact portion 15 is raised. When it touches the fingertip stopper 13, the touch sensor 13a detects it and enters the measurement preparation state. When the index finger 1 is further advanced, the movable portion 30b rotates away from the base portion 10a against the attraction force of the magnet 29, and the base between the index finger and the middle finger is cuffed.
When touching the trailing edge of the trailing edge, the touch sensor 25 detects this and the measurement of the acceleration pulse wave is started.

At this time, even if the length of the index finger 1 varies, the swing stroke of the movable portion 30b absorbs the variation, and the index finger 1 can be constantly and accurately measured in the set state. Also, by the rotation of the movable portion 30b,
The fingertip abdomen setting surface 11 is inclined downward along the natural position of the fingertip. Although the slide stroke of the slider-type claw abutment portion 15 changes according to the individual difference in the height of the claw, the constant load spring characteristic allows the fingertips to be constantly positioned stably.
There is no distortion of the pulse wave waveform due to excessive pressure, and no disturbance light is incident. Therefore, a stable waveform signal that correlates with the natural volume change of the fingertip blood vessel with high accuracy and is stable is supplied to the apparatus main body, the acceleration pulse wave is analyzed with high accuracy, and the analysis result is displayed on the apparatus main body. A blood pressure measurement start signal is sent from the main body of the device after the acceleration pulse wave is analyzed, the cuff 20 automatically pressurizes the index finger 1 in the set state, and the blood pressure is measured by a well-known method. It is supplied to the device and displayed.

Incidentally, the photoelectric elements 17, 17 for detecting finger pulse wave
By also using a as a photoelectric element for blood pressure measurement, the photoelectric element of the cuff 20 is abolished, or the pressure sensor is abolished when blood pressure is analyzed by detecting a pulse wave of air pressure with a pressure sensor. It becomes possible to do. To start the measurement, remove the touch sensor 13a at the tip of the fingertip and remove the cuff 20.
It may be simply performed based on the touch sensor 25. When the touch sensor 25 is not provided, the detection signal of the touch sensor 13a may be delayed for a predetermined time to start the measurement.

FIG. 5 shows another embodiment of the present invention.
The same or equivalent parts as those in the above-described embodiment are designated by the same reference numerals. The finger set base 30 includes a base portion 30a in which a guide mechanism is provided on the base portion 10a instead of the hinge mechanism, and a slide type movable portion 30 whose lower end portion is guided so as to be separable from and into the base portion.
It is divided into b and. Then, the slide rods 31 projecting from both sides of the bracket 2 are inserted into the guide pipes 37 on the both sides of the bracket 27 of the movable portion 30b, which are slightly downward, and are slidable back and forth. At the rear end of the slide rod 31, a flange-shaped stopper 31a that abuts the rear end of the guide pipe 37 is formed.

As a result, the movable portion 30b that is pulled by the constant force mainspring 28 and also attracted by the attraction tools 29, 29a using magnets can be pushed out in the horizontal direction until it is restrained by the stopper 31a. At the time of measurement, first, the claw contact portion 15 moves up, and when the tip of the fingertip comes into contact with the fingertip stopper 13, the movable portion 30b horizontally moves the base between the index finger and the middle finger against the rear edge of the cuff 20. Move forward.

[0018]

According to the invention of claim 1 or 2, it is possible to realize a fingertip pulse wave sensor capable of simultaneously measuring blood pressure with the finger when measuring the fingertip pulse wave. Even if the blood pressure is not measured separately, it is possible to evaluate the blood circulation state of the peripheral blood vessels by the acceleration pulse wave while the blood pressure is being grasped, and the blood circulation can be grasped with higher accuracy. Further, since the finger is set on the stationary base, the blood pressure can be measured more stably than the conventional finger sphygmomanometer in which the finger is floated and measured. By moving the fingertip pulse wave sensor part forward from the blood pressure sensor part by swinging or sliding according to the length of the finger, the finger is set accurately for both sensors, and more accurate and stable measurement results are expected. it can.

According to the third aspect of the invention, the forward movement of the movable portion is restricted until the fingertip comes into contact with the fingertip stopper.
The fingertips are set smoothly, and the fingers can be set easily and accurately.

According to the invention of claim 4, the touch sensor for detecting the contact of the base of the index finger is provided at the rear edge of the cylindrical cuff case, so that the set state is always accurate even if the length of the index finger varies. Can be measured.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a fingertip pulse wave sensor with a blood pressure measuring function according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the sensor.

FIG. 3 is a perspective view of a main part of the sensor in an operating state.

FIG. 4 is a perspective view showing a usage state of the sensor.

FIG. 5 is a longitudinal sectional view of a fingertip pulse wave sensor with a blood pressure measuring function according to a second embodiment of the present invention.

[Explanation of symbols]

 10, 30 Finger setting base 10a, 30a Base portion 10b Swing type movable part 11 Finger tip belly setting surface 13 Finger tip stopper 13a, 25 Touch sensor 14 Claw contact surface 15 Sliding claw contact portion 16 Slide pipe 17 Light receiving element 17a Light emission Element 21 Pump 22 Solenoid valve 28 Constant load mainspring 29 Magnet 30b Sliding type moving part 31 Slide rod

Claims (4)

[Claims] 1. A stationary type finger setting table for setting a finger is divided into a base portion and a swing type movable portion having a lower end portion hinged to the base portion and having a fingertip belly setting surface formed on an upper surface, A spring is provided between the base portion and the movable portion so as to support the movable portion in contact with the base portion, and can be brought into and out of contact with the fingertip pad surface closer than a standard fingertip thickness. A claw abutting portion facing the aforesaid and having a claw abutting surface biased by a spring in the approaching direction is provided on the swing-type movable portion, and is set on the upper surface of the base portion on the fingertip pad setting surface. A cylindrical cuff for a finger sphygmomanometer that presses the base of a finger is arranged, a light emitting element is arranged on one side of the finger tip abdomen setting surface and the nail contact surface, and a light receiving element is arranged on the other side so as to face each other, and the finger is At the tip of the light emitting element or the light receiving element on the apex setting surface, a fingertip A fingertip pulse wave characterized in that a fingertip stopper for contacting the tip is formed, and the distance between the fingertip stopper and the rear end of the cuff is set shorter than the standard finger length in the contacting state. Sensor. 2. A stationary finger setting table for setting a finger is divided into a base portion and a slide type movable portion which is slidably guided forward and backward by the base portion and has a finger tip belly setting surface formed on the upper surface. A spring is provided between the base portion and the movable portion so as to support the movable portion in contact with the base portion. A claw abutting portion facing a contactable manner and having a claw abutting surface biased by a spring in the approaching direction is provided on the slide-type movable portion, and is set on the fingertip belly setting surface on the upper surface of the base portion. Arranged a cylindrical cuff for a finger sphygmomanometer that pressurizes the base of the finger, a light emitting element on one side of the finger tip abdomen setting surface and the nail contact surface, and a light receiving element on the other side are arranged facing each other, Tip of the light emitting element or the light receiving element on the fingertip pad setting surface A fingertip stopper that abuts the tip of the fingertip is formed on the table, and the distance between the fingertip stopper and the rear end of the cuff is set to be shorter than the standard finger length in the contact state. Fingertip pulse wave sensor. 3. The base and the movable part are provided with a suction tool for attracting the movable part to the base by magnetic force, and the suction force is such that the movable part opposes the base until the fingertip comes into contact with the fingertip stopper. The fingertip pulse wave sensor according to claim 1, wherein the fingertip pulse wave sensor is set so as to be held in a contact state. 4. The cylindrical cuff is configured by attaching a bag-shaped cuff body to an inner circumference of the cylindrical cuff case, and a root between the index finger and the middle finger inserted into the cuff is attached to a rear end edge of the cylindrical cuff case. The fingertip pulse wave sensor with a blood pressure measuring function according to claim 1 or 2, further comprising a touch sensor for detecting the contact of the finger.