JPH0852118A - Portable sphygmograph - Google Patents

Abstract

PURPOSE:To provide a sphygmograph capable of taking accurate measurements and enhancing comfort when fitted to the body of a subject by applying steady pressure sufficient to measure a sphygmogram to a sensor attached to the body and also adopting a simpler construction for reduction in both the size and cost. CONSTITUTION:A main body 1 is provided with a first band 2, to which a sensor 4 is attached at a predetermined position in such a way as to be projected toward a subject under examination. A sphygmogram acts on the sensor 4 from the direction of the arrow B and an output signal thereof is transmitted to the main body 1 via a lead wire 8. In addition, the main body 1 is provided with a second band 3, to which an elastic member 5 in a protruding form is attached in such a way as to be projected toward the subject so that a force is generated to keep the sensor 4 in intimate contact with the subject under examination.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable pulse wave measuring device having a pulse wave sensor which is brought into close contact with a living body, and more particularly to a mounting mechanism / structure of the portable pulse wave measuring device for a living body.

[0002]

2. Description of the Related Art Conventionally, as a portable pulse wave measuring device, FIG.
4, JP-A-4-99560 shown in FIG. 15 and the like have been proposed. In FIG. 14, with the band 21 fully extended, pass the arm through the ring of the band 21 and press the knob 23.
In the direction of arrow A. As a result, the winding shaft 25 also rotates and the band 21 is wound up. At this time, the ratchet wheel 26 also rotates while allowing the ratchet pawl 22 to escape.
When the winding is stopped in a state where the arm fits, the force of the return spring 24 acts to return in the direction opposite to the arrow A. Here, the ratchet wheel 26 includes the ratchet claw 2
Since it is locked at 2, the sensor does not stop and unwind in a balanced state, and the sensor is pressed by the arm. In addition, when loosening the band 21, the button 27 shown in FIG. 15 is pushed.

[0003]

However, the conventional portable pulse wave measuring device has the following problems.

First, in measuring the pulse wave, a predetermined pressing force is applied to the effective response part of the living body capable of measuring the pulse wave, but in the conventional method of tightening the entire band, the entire band is Since it comes into close contact with the living body, the breathability is poor and the feeling of wearing is not always good, such as when sweating while being carried.

When the band is carried with the band being loosely tightened, the sensor part is easily displaced from the effective response part, and sufficient pressing force cannot be obtained, so that accurate pulse wave measurement is difficult.

Further, in the conventional portable pulse wave measuring device, the structure is complicated, it is difficult to miniaturize, and it is difficult to reduce the cost.

Therefore, the portable pulse wave measuring device of the present invention solves the above problems, and its purpose is as follows.

(1) A portable pulse wave measuring device capable of accurately applying a pressing force sufficient for pulse wave measurement to the pulse wave sensor unit attached to the band for accurate measurement and having a comfortable fit. To get.

(2) To obtain a portable pulse wave measuring device having a simple structure, which can be miniaturized and reduced in cost.

[0010]

A portable pulse wave measuring device of the present invention comprises a pulse wave sensor for measuring a pulse wave in close contact with a living body, and an arithmetic processing means for processing an output signal of the pulse wave sensor. A first band that holds the main body and the pulse wave sensor and is attached to one side of the main body, a second band that is attached to the other side of the main body, and a second band that is attached to the second band. And a convex elastic member for generating a force in a direction to bring the pulse wave sensor into close contact with the living body at the time of wave measurement.

Further, the slidable convex elastic member attached to the second band has a leather function for holding the end portion of the first band, and the convex elastic member is It has convex elastic members on both sides with respect to the band insertion hole, and has an asymmetrical shape with respect to the band insertion hole. The elastic member is provided with a fixing means which is inserted into and removed from one of the small holes, and the convex elastic member has a two-body structure of an elastic pressing portion and a band holding member, etc. It is desirable to adopt the configuration of.

[0012]

The operation of the portable pulse wave measuring device of the present invention is as follows.

First, in the portable pulse wave measuring apparatus according to the first aspect, the pulse wave sensor attached to a predetermined position of the first band is provided to the living body by providing the second band with a convex elastic member. Stable pressing is performed in the direction of closely contacting with.

FIG. 2 is a diagram showing a typical example for explaining this operation. In the figure, the pulsating pressure of the living body 6 (this drawing shows the cross section of the wrist) acts on the pulse wave sensor 4 in the direction of arrow B from around the radius 32. In order to press the pulse wave sensor 4 more stably and closely to the living body, a force is applied in the upper right direction of the straight line D-D passing through the center Z of the living body and perpendicular to the arrow B (the direction opposite to the arrow B). Need to work.

The convex elastic member 5 is attached for this purpose. This is because when the convex elastic member 5 is located at the position shown in FIG.
And the force of arrow G are decomposed into two directions. This is because the force of the arrow F serves as a force for increasing the degree of adhesion to the living body. Therefore, the convex elastic member 5 may be installed in the upper right direction of the straight line D-D.

However, the convex elastic member 5 has a straight line DD.
If it is located on the upper right of, the degree of close contact with the living body 6 is increased, but the wearing feeling is not always good over all areas.

First, the direction I is the lower surface of the main body 1, and not only is the mounting feeling unsatisfactory, but the installation method is also difficult and it cannot be said that it is a realistic installation location. Next, regarding the E direction, the living body 6
It has no bones and is very comfortable to wear. See also arrow H
When the elastic member 5 having a convex shape is attached to the direction, the elastic member 5 may hit the sacrum 31 of the living body 6 and the fitting feeling may be slightly impaired, but the adhesive force can be exerted most strongly, which is preferable for stable pressing. . From the above, it is most desirable to attach the convex elastic member 5 near the position shown in FIG.

By sliding the convex elastic member 5 on the second band 3 in the direction of the arrow C, the pulse wave sensor is stable depending on the physical constitution of the person to be measured (wrist shape, etc.). The installation position can be appropriately adjusted so that a pressing force is applied.

In the portable pulse wave measuring device according to the present invention, the slidable convex elastic member 5 attached to the second band has a leather function for holding the end of the first band. In addition to obtaining a stable pressing force, it has a composite function that also has a function different from this function.

In the portable pulse wave measuring device according to the third aspect of the present invention, since the convex elastic member is biconvex and asymmetrical with respect to the band insertion hole, the inserting direction of the elastic member is changed. As a result, the height of the convex portion with respect to the living body is changed, and thereby the pressing force can be adjusted.

In the portable pulse wave measuring device according to the fourth aspect, the structure of the fixing portion of the band is made extremely large by the plurality of small holes provided in the second band and the fixing means inserted into the small holes. It aims to be small and compact. This makes it possible to improve the appearance of the outside of the band.

In the portable pulse wave measuring device according to the present invention, since the convex elastic member has a two-body structure of the elastic pressing portion and the band holding member, the band is not measured and the band is held. Thus, the positions of the elastic pressing portion and the band holding member can be exchanged, and the elastic pressing portion that is consumed can be replaced appropriately.

[0023]

Embodiments of the present invention will be described below with reference to the drawings.

(1) First Embodiment FIG. 1 is a side view of a portable pulse wave measuring device of the present invention.
In this drawing, 1 is a main body of a portable pulse wave measuring device, 2
Is a first band, 3 is a second band, and 4 is a piezoelectric pulse wave sensor for converting a pulsating pressure into an electric signal to detect a pulse wave. The pulse wave sensor 4 is attached to a predetermined position of the first band 2 and projects toward the living body 6 side of the first band 2. Then, the pulse wave sensor is pressed against the pulse wave measurement site, for example, the radial artery part of the wrist, and the pulsation pressure displacement is measured. In this case, the pulsating pressure acts on the pulse wave sensor 4 from the direction of arrow B,
The pulse wave sensor 4 converts this pulsating pressure into an electric signal.
This electric signal is connected to the pulse wave sensor 4 and passes through the lead wire 8 embedded in the longitudinal direction of the first band, and the main body 1
It is connected to the arithmetic processing means provided inside.

Reference numeral 5 is a convex elastic member made of urethane foam or the like. This convex elastic member 5 is the same as the second elastic member described above.
Attached to a predetermined position of the band 3 of the second band 3
Protruding toward the living body side. Here, the convex shape means that when the portable pulse wave measuring device of the present invention is attached to a living body, it is partially projected to the living body side with respect to the surface of the second band 3 that contacts the living body side. It means that it has a simple shape. Therefore, the second band 3 may be formed in the shape of itself, or may be formed as a separate member as in the present embodiment. In addition, the size of the convex shape (width, length, height, etc.) is not particularly limited, but in order to obtain a stable pressing force and a good feeling of wearing, the convex part and the living body are not It is desirable that the cross-sectional area of the contact region is approximately 0.2 to ⁶ cm ² .

FIG. 3 is a block diagram showing a typical example of the control unit of the portable pulse wave measuring device of the present invention. The pulsating pressure generated from the living body acts on the pulse wave sensor 4 and is converted into an electric signal. This electric signal is arithmetically processed in the main body 1 through the lead wire 8, and the result is displayed on the display unit provided in the main body 1. As arithmetic processing, it has a function of performing various signal processing such as amplification of electric signals, level conversion (A / D conversion, etc.), comparison, addition / subtraction, normalization, averaging, quantization, and storage. It is appropriately selected and executed depending on whether signal processing is necessary. The display contents include, for example, pulse rate,
Examples include direct numerical values such as pulse pressure (blood pressure), determination information based on these numerical values, history information, and the like.

FIG. 4 is a detailed drawing of the convex elastic member 5. In order to more closely contact the living body and improve the fit, the K surface that is in direct contact with the living body has a generally gentle concave shape according to the shape of the living body. In addition, in order to prevent displacement from the living body, a plurality of hemispherical small projections 9 are provided on the surface of the K surface. Reference numeral 16 is a band insertion hole for setting the convex elastic member 5 on the second band 3. Here, since the lateral dimension 17 of the band insertion hole 16 is set to be slightly smaller than the width dimension of the second band 3, when the convex elastic member 5 is set on the second band 3, it is appropriate. The frictional force works and is retained.

In order to measure the pulse wave by using the portable pulse wave measuring device constructed as described above, it is necessary to apply a sufficient pressing force to the pulse wave sensor 4 for the measurement. If the pressure is too small, the pulsating pressure does not sufficiently act on the pulse wave sensor 4, and accurate measurement is difficult. Further, in the case of excessive pressing, the radial artery of the wrist is crushed and the pulsation itself is changed, which makes accurate measurement difficult.

The pressing force largely depends on the difference in living body. As shown in FIG. 1, the pulse wave pulse wave sensor 4 is used in this embodiment.
It is desirable that the convex elastic member 5 be slid in the direction of arrow C so as to be brought into close contact with the living body in accordance with the living body 6. As a result, the position is adjusted (set) to an appropriate position, which enables stable pulse wave measurement.

In this case, it should be possible to confirm that the convex elastic member 5 is set at an appropriate position, a sufficient pressing force is applied for measurement, and that a sufficient pulsating pressure acts on the pulse wave sensor. Is desirable.

FIG. 5 is a diagram showing an example of a display unit provided in the main body 1 of the portable pulse wave measuring apparatus. Reference numeral 15 is a pulsation pressure detection display, which lights up when a pulsation pressure sufficient for measurement is obtained from the pulse wave sensor, and at the same time, an alarm sounds.
The user can confirm that the convex elastic member 5 is set at an appropriate position by turning on the pulsation pressure detection display 15 or ringing an alarm.

The portable pulse wave measuring device of the present invention is provided with the convex elastic member 5 so that the pulse wave sensor 4, the main body 1 and the convex elastic member 5 are brought into close contact with the living body from three directions. It is possible to obtain a good wearing feeling and a stable pressing force.

Especially when the band is loose, the effect of the convex elastic member 5 is great. When the environment for using the portable pulse wave measuring device is hot and humid, it is often used while keeping the band loose and carrying it, and providing a gap between the living body and the portable pulse wave measuring device to improve ventilation. . In this case, holding by the band cannot be expected. However, since the convex elastic member 5 is provided, the pulse wave sensor 4, the main body 1, and the convex elastic member 5 are brought into close contact with the living body from the three directions, so that the pulse wave sensor 4 is reliably positioned at the pulse wave measurement site. Pressed and accurate measurement is possible.

(2) Second Embodiment FIG. 6 shows an embodiment in which the convex elastic member 5 of the present invention also has a leather function for holding the end portion of the other first band 2. It is a side view shown.

In the case of the present embodiment, there is nothing protruding except the pulse wave sensor 4 and the convex elastic member 5 on the outer peripheral portions of the first band 2 and the second band 3, so that the appearance is heavy. There is no feeling and it has the effect of increasing the degree of freedom in design.

(3) Third Embodiment FIGS. 7 and 8 show a modification of the convex elastic member. This example is an example in which the pressing force on the living body can be adjusted.

As shown in FIG. 7, the convex elastic member 5 has convex elastic members on both sides of the living body and the opposite side to the band inserting hole 16, and the band inserting hole 16 is provided.
In contrast, it has an asymmetrical shape. That is, one is thin and the other is thick with respect to the insertion hole of the band.

As shown in FIG. 8, the convex elastic member 5 is provided.
The portions of the S surface and the P surface that are in direct contact with the living body have a concave shape in order to improve the fit with the living body. Also, in order to prevent displacement from the living body, the S surface and P
A plurality of hemispherical small projections 9 are provided on the surface of the surface.

Therefore, the elastic member 5 having a convex shape due to the difference in living body
By changing the inserting direction of the to the second band 3, the pressing force to the living body can be adjusted.

In addition, a strong impact is applied depending on the use condition,
When the pulse wave sensor 4 is easily misaligned, a strong pressing force is applied. Therefore, the pressing force on the living body can be appropriately adjusted by selecting the inserting direction of the convex elastic member 5. (4) Fourth Embodiment FIG. 9 is a side view showing a modified example of the structure for holding the convex elastic member to the second band 3. In the figure, the convex-shaped elastic member 5 has a spherical projection on the side opposite to the living body side, and is one of a plurality of small holes provided in the second band 3 in advance. By pushing
It has a structure such that it is held and fixed to the second band 3. The portable pulse wave measuring device is configured to be attachable / detachable to / from a small hole so that a feeling of wearing the portable pulse wave measuring device and a stable pressing force can be obtained by selecting any of the plurality of small holes and inserting and fixing the selected small hole. ing. In the case of the present embodiment, the spherical shape of the tip of the elastic member 5 having a convex shape only slightly appears on the outer side of the second band 3 (the side opposite to the living body side). The effect is to increase the degree.

(5) Fifth Embodiment FIG. 10 is a sectional view showing a modification of the convex elastic member. The convex elastic member has a two-body structure including the elastic pressing portion 10 and the band holding member 11, is engaged by the pin 12, and is rotatable in the arrow direction. The band holding member 11 is made of a thin metal plate having a rod-shaped protrusion 16. The elastic pressing portion 10 has a small hole having a diameter into which the rod-shaped protrusion 16 can be fitted. Then, the second band 3 is sandwiched between the elastic pressing portion 10 and the band holding member 11 so as to be fixed to the second band 3.

FIG. 11 is a sectional view of the convex elastic member and the living body 6 at the time of pulse wave measurement. At the time of pulse wave measurement, the elastic pressing portion 10 of the convex elastic member is set in a small hole pre-opened in the second band 3 so that the surface of the elastic pressing portion 10 is on the living body side, and the pulse wave sensor 4 is pressed and measured. To do.

FIG. 12 is a sectional view of the convex elastic member and the living body 6 at the time of non-measurement. At the time of non-measurement, the surface of the band holding member 11 of the elastic member having a convex shape is set in a small hole or the like which is opened in advance in the second band 3 such that the surface is on the living body side.

Since the convex elastic member configured as described above has a thin plate at the portion that directly contacts the living body when not measuring, the living body has a small portion protruding from the second band 3. Has a good fit and has a good fit.

(6) Sixth Embodiment FIG. 13 is a sectional view showing a modification of the convex elastic member. The convex elastic member has a two-body structure including an elastic pressing portion 13 and a band holding member 14 that is held by the second band 3, and a plurality of protrusions protruding from the elastic pressing portion 13 are connected to the band holding member. It is fitted in and fixed to a plurality of small holes provided in 14.

With long-term use, it is expected that the elastic pressing portion 13 that comes into direct contact with the living body will be cracked or discolored due to sweat or friction with the living body. Therefore, the convex elastic member of the present embodiment includes the elastic pressing portion 13 and the band holding member 14.
Due to the two-body structure, the elastic pressing portion 13 can be easily replaced. In addition, by providing the elastic pressing portion 13 and the band holding member 14 with color variations, there is also an effect that the elastic pressing portion 13 and the band holding member 14 can be easily replaced according to the preference of the user.

In the present invention, the convex elastic member 5 is used.
Is preferably urethane foam, but almost the same effect can be obtained even if a molded product of synthetic resin is used.

[0048]

As described above, the present invention has the following effects.

According to the first aspect of the present invention, a portable pulse wave measuring device is provided which is capable of stably applying a sufficient pressing force to the pulse wave measurement for accurate measurement and which is comfortable to wear. be able to.

Furthermore, since the structure is extremely simple, it is possible to reduce the size and cost.

According to the second aspect of the present invention, it is possible to have not only the function of obtaining a stable pressing force but also a function (leather function) different from this. This allows
The structure of the portable pulse wave measuring device is further simplified, and it has a great advantage especially in terms of cost, appearance, and design.

According to the third aspect of the present invention, by changing the inserting direction of the convex elastic member, the height of the convex portion with respect to the living body is changed, whereby the pressing force can be adjusted. For this reason, it becomes possible to set an appropriate pressing force according to the usage situation of the portable pulse wave measuring device and the conditions of the user.

According to the invention described in claim 4, the structure of the fixing portion of the band can be made very small and compact. This makes it possible to improve the appearance of the outer side of the band and to realize a band structure having an excellent design.

According to the fifth aspect of the present invention, by changing the positions of the elastic pressing portion and the band holding member with respect to the band during non-measurement and during measurement, a fit feeling to a living body particularly during non-measurement is obtained. It can be greatly improved. Also,
The elastic pressing portion to be consumed can be easily replaced as appropriate, and the pressing portion can be appropriately selected according to the preference of the user and the wearing feeling of the user.

[Brief description of drawings]

FIG. 1 is a side view of a first embodiment of the present invention.

FIG. 2 is a side view for explaining the action of the convex elastic member of the present invention.

FIG. 3 is a block diagram of a control unit of the present invention.

FIG. 4 is a perspective view of a convex elastic member according to the first embodiment of the present invention.

FIG. 5 is a front view of the display unit according to the first embodiment of the present invention.

FIG. 6 is a side view of the second embodiment of the present invention.

FIG. 7 is a side view of the third embodiment of the present invention.

FIG. 8 is a perspective view of a convex elastic member according to a third embodiment of the present invention.

FIG. 9 is a side view of the fourth embodiment of the present invention.

FIG. 10 is a side view of the fifth embodiment of the present invention.

FIG. 11 is a sectional view of a fifth embodiment of the present invention when measuring a pulse wave.

FIG. 12 is a sectional view of a fifth embodiment of the present invention when a pulse wave is not measured.

FIG. 13 is a side view of the sixth embodiment of the present invention.

FIG. 14 is a top view showing a conventional technique.

FIG. 15 is a cross-sectional view showing a conventional technique.

[Explanation of symbols]

 1 Main Body 2 First Band 3 Second Band 4 Pulse Wave Sensor 5 Convex Elastic Member 6 Living Body 8 Lead Wire 9 Small Protrusion 10 Pressing Elastic Portion 11, 14 Band Holding Member 15 Pulsating Pressure Detection Display 16 Band Insertion Hole 17 Lateral dimension 31 Squat 32 Radius

Claims (5)

[Claims] 1. A pulse wave sensor for measuring a pulse wave in close contact with a living body, a main body provided with an arithmetic processing unit for processing an output signal of the pulse wave sensor, and a main body holding the pulse wave sensor, The first band attached to one side, the second band attached to the other side of the main body, and the second band, and the pulse wave sensor is used to measure the pulse wave at the time of pulse wave measurement. A portable pulse wave measuring device, comprising: a convex elastic member that generates a force in a direction of being closely attached to the. 2. The elastic member having a slidable convex shape attached to the second band according to claim 1, wherein the elastic member has a leather function of holding an end portion of the first band. Portable pulse wave measuring device. 3. The elastic member according to claim 1, wherein the convex elastic member has convex elastic members on both sides of the band insertion hole, and has an asymmetric shape with respect to the band insertion hole. A portable pulse wave measuring device characterized in that 4. The plurality of small holes are provided in the second band, and the convex elastic member according to claim 1,
A portable pulse wave measuring device comprising a fixing means that is inserted into and removed from one of the small holes. 5. The portable pulse wave measuring device according to claim 1, wherein the convex elastic member has a two-body structure including an elastic pressing portion and a band holding member.