WO2005092182A1

WO2005092182A1 - Biological information measuring device

Info

Publication number: WO2005092182A1
Application number: PCT/JP2005/002021
Authority: WO
Inventors: Susumu Kotanagi; Takashi Nakamura; Kazuya Maegawa; Shinichiro Miyahara; Koichi Moriya
Original assignee: Seiko Instruments Inc.
Priority date: 2004-03-26
Filing date: 2005-02-10
Publication date: 2005-10-06
Also published as: JP4485234B2; JP2005270543A

Abstract

A biological information measuring device comprising a biological sensor section including a body, a protrusion formed on the lower surface of the body, a means for fixing the body to an arm while directing the lower surface of the body toward the surface side of a biological object, a light emitting section for irradiating light toward the biological object while touching the surface of the biological object, a light receiving section for receiving reflection light from the biological object out of the light irradiated from the light emitting section and producing biological information signal corresponding to the quantity of received light, and means for detecting whether or not the light emitting section and the light receiving section are in contact with the surface of the biological object, and a section provided in the body and detecting biological information based on the biological information signal, characterized in that the biological sensor section is arranged on the lower surface of the protrusion. The biometric information measuring device can be fixed for a long time without giving an unpleasant feeling while enhancing tightness.

Description

Specification

Biological information measurement device

Technical field

The present invention relates to a biological information measuring device capable of measuring biological information such as a pulse rate while being worn on a wrist (arm).

Priority is claimed on Japanese Patent Application No. 2004-091942, filed on March 26, 2004, the content of which is incorporated herein by reference.

Background art

[0002] In recent years, with increasing interest in health management, various biological information measuring devices capable of measuring various biological information such as a pulse rate while being attached to a wrist (arm) or the like have been provided. And Patent Document 1).

[0003] Among this type of biological information measuring device, for example, a device that detects a pulse rate irradiates light toward a living body while being attached to a wrist, and reflects light reflected from a blood vessel by a pulse sensor or the like. That is, a reflected signal is received, and a pulse signal corresponding to a pulse is extracted from the reflected signal to calculate a pulse rate. In particular, since the pulse rate can be easily measured while being worn on the wrist, it is easily used by users.

Patent Document 1: Japanese Patent Application Laid-Open No. 2001-78973 (Paragraph No. 0011-0031, FIGS. 1 to 7)

Problems to be solved by the invention

[0004] The above-described conventional biological information measuring device is generally used while being worn on a wrist.

However, depending on the movement of the user, the muscles move and the thickness (diameter) of the wrist changes, and a gap may be left between the biological information measuring device and the surface of the living body. For this reason, there was a possibility that the adhesion was reduced and accurate biological information could not be detected. Also, in order to securely fix the biological information measuring device to the wrist, for example, when tightened with a band, the feeling of pressure on the wrist increases and it is difficult to wear the device for a long time.

[0005] The present invention has been made in view of such circumstances, and has as its object to improve the adhesiveness and to provide a biological information measuring device that can be worn for a long time without feeling uncomfortable. Is to provide an installation.

Means for solving the problem

[0006] The present invention provides the following means in order to solve the above problems.

[0007] In the biological information measuring device of the present invention, a main body, a protruding portion formed to protrude from the lower surface of the main body, and the main body attached to the arm with the lower surface of the main body facing the living body surface side. Fixing means, a light emitting unit for irradiating light toward the living body in contact with the surface of the living body, and receiving light reflected from the living body out of the light emitted by the light emitting unit and according to the amount of received light A living body sensor section having a light receiving section for generating a living body information signal, a light emitting section and contact detecting means for detecting whether or not the light receiving section is in contact with the surface of the living body; A biological information detecting unit that detects biological information based on the biological information signal, wherein the biological sensor unit is disposed on a lower surface of the protrusion.

[0008] In the biological information measuring device according to the present invention, the main body is attached to the wrist (arm) by the fixing means, and then light is emitted from the light emitting section toward the living body. Part of the irradiated light is absorbed by, for example, hemoglobin in blood vessels, and part of the other light is reflected by living tissue. The light receiving unit receives the reflected light and generates a biological information signal such as a pulse signal according to the amount of received light. The biological information signal can be detected by the biological information detecting means by performing predetermined processing on the biological information signal. In addition, the contact detecting means can detect whether the light emitting section and the light receiving section are securely in contact with the surface of the living body.

[0009] In particular, when the main body is mounted on the wrist by the fixing means, the protruding portion protrudes from the lower surface of the main body, so that the living body surface and the lower surface of the protruding portion are easily brought into contact with each other. That is, the adhesion of the living body sensor part is improved. Therefore, it is not necessary to fix the main body so that it is strongly pressed (pressed) against the surface of the living body by the fixing means. Therefore, even if worn for a long time, no discomfort is felt. In addition, since the adhesiveness of the living body sensor unit is improved, light irradiation and light reception can be performed efficiently by the light emitting unit and the light receiving unit. Therefore, biological information can be detected with high accuracy.

[0010] Further, the biological information measuring device according to the present invention is the same as the biological information measuring device according to the present invention. The lower surface of the main body is provided with a protruding portion formed by protruding the lower surface force of the main body at least at a position sandwiching the protruding portion and at a predetermined distance from a side surface of the protruding portion. The distance between the lower surface of the main body and the lower surface of the main body is set to be equal to or greater than the distance between the lower surface of the protrusion and the lower surface of the main body.

[0011] In the biological information measuring device according to the present invention, when the main body is attached to the arm by the fixing means, the surface of the living body is in contact with the lower surface of the ridge and the lower surface of the protrusion. . At this time, since the protruding portion protrudes to a position where the protruding portion is sandwiched and the side force of the protruding portion is separated by a predetermined distance, a gap is formed between the protruding portion and the protruding portion. I have. As a result, the living body comes into contact with the lower surfaces of the protruding portion and the ridge portion while once entering the gap on both sides sandwiching the protruding portion. Therefore, the adhesion between the living body surface and the living body sensor can be more reliably ensured.

In particular, since the protruding ridge protrudes from the lower surface of the main body with respect to the protruding portion by the same height or higher, the protruding ridge contacts the surface of the living body at the same level as the protruding portion or before the protruding portion. In addition, the ridge contacts the body surface outside the protrusion. Thereby, the living body surface can be stably brought into contact with the lower surface of the protrusion in the same state, and the contact pressure can be kept constant. Therefore, biological information can be stably detected over a long period of time.

[0013] Further, in the biological information measuring device according to the present invention, in the biological information measuring device according to the present invention, the contact detection means has at least a pair of electrodes, and a potential difference between the pair of electrodes is reduced. And detecting whether or not the light emitting unit and the light receiving unit are in contact with the surface of the living body.

[0014] In the biological information measuring device according to the present invention, when the main body is worn on the arm, the pair of electrodes comes into contact with the surface of the living body, and discharge is performed through the surface of the living body. This reduces the potential between the electrodes. Then, by detecting the potential difference between the pair of electrodes, it is possible to easily and surely detect whether or not the light emitting unit and the light receiving unit are securely in contact with the surface of the living body. The electrodes need not be a pair. For example, a plurality of electrodes may be provided, and based on the potential difference between these electrodes, it may be possible to detect whether or not a force is applied.

[0015] The biological information measuring device according to the present invention is the same as the biological information measuring device according to the present invention. And the pair of electrodes are arranged so as to sandwich the light emitting unit and the light receiving unit therebetween.

In the biological information measuring device according to the present invention, since the pair of electrodes are disposed so as to sandwich the light emitting unit and the light receiving unit, the light emitting unit and the light receiving unit are formed with high precision. It can detect whether or not the force is in contact with the body surface.

[0017] Further, the biological information measuring device according to the present invention, in any one of the biological information measuring devices according to the present invention, electrically connects the light emitting unit and the light receiving unit with the biological information detecting unit. A flexible substrate, which is provided in the main body so as to press the light emitting section and the light receiving section toward the lower surface side of the main body by its own elasticity. It is a feature.

In the biological information measuring device according to the present invention, since the light emitting portion and the light receiving portion are constantly pressed toward the lower surface side of the main body due to the elasticity of the flexible substrate, when the main body is worn on the wrist. The light emitting unit and the light receiving unit are in a state close to the body surface. Therefore, it is possible to more efficiently irradiate and receive light to the living body, and it is possible to improve the detection accuracy of the biological information.

[0019] Further, the biological information measuring device according to the present invention, in any one of the biological information measuring devices according to the present invention, further includes a display unit that displays the detected biological information on the upper surface of the main body. It is characterized by the following.

[0020] In the biological information measuring device according to the present invention, the biological information displayed on the display unit can be easily visually recognized, so that the detected biological information can be confirmed whenever necessary or the biological information can be detected. It is easy and easy to use because it is possible to check whether it is performed correctly.

[0021] Further, in the biological information measuring device according to the present invention, in the biological information measuring device according to any one of the above-mentioned present invention, the fixing means may include a base end attached to the main body and attachable to an arm. A first band and a second band, wherein the first band and the second band are arranged to face each other with the main body interposed therebetween, and are formed of a stretchable elastic material. It is a feature.

[0022] In the biological information measuring device according to the present invention, the first band and the second band are used. Thus, the main body can be easily and securely attached to the wrist like a wristwatch. In particular, since both bands are made of a stretchable elastic material, even if the thickness of the wrist changes slightly due to the movement of muscles, the change can be absorbed and the gap between the body and the surface of the living body can be absorbed. Can be prevented from occurring. Therefore, the band can be worn for a long time without having to tighten both bands.

[0023] Further, in the biological information measuring device according to the present invention, in any one of the biological information measuring devices according to the present invention, the biological sensor unit may be configured such that the first band or the second band is located from a center position of the main body. The band 2 is arranged at a position shifted to the base end side.

[0024] In the biological information measuring device according to the present invention, when the main body is attached to the wrist like a wristwatch by the first band and the second band, there is a slight play between the main body and the wrist. Due to this play, the main unit is displaced by the action of gravity (for example, when the arm is displaced with the arm facing downward (ground side), or with the back of the hand inside and the arms horizontal, and the top of the main unit in front of your eyes Even if the biosensor is displaced while being pressed, the biosensor is located at a position shifted from the center position of the main body to the base end of the first band or the second band. This can prevent a decrease in the adhesion of the sensor portion.

[0025] Further, in the biological information measuring device according to the present invention, in any one of the biological information measuring devices according to the present invention, the main body can be charged with a rechargeable battery, and charging means for charging the rechargeable battery with electric power. It is characterized by having the following.

[0026] In the biological information measuring device according to the present invention, since external power can be charged to the rechargeable battery via the charging means, it is not necessary to separately prepare a normal battery or the like. Therefore, the cost for maintaining the product can be reduced.

[0027] In the biological information measuring device according to the present invention, in any one of the biological information measuring devices according to the present invention, a distance between a lower surface of the protruding portion and a lower surface of the main body is set to 2 to 4 mm. It is characterized by

[0028] In the biological information measuring device according to the present invention, the biological information measuring device is attached to the wrist with the lower surface of the protruding portion projecting from the lower surface of the main body by 24 mm. Thereby, the protruding portion can be reliably brought into contact with the surface of the living body, and the adhesion of the living body sensor can be ensured. That is, the lower surface of the protrusion When the distance from the lower surface of the main body is 2 mm or less, there is little step and a gap is formed between the living body surface and external light is likely to enter. When the distance force between the lower surface of the protrusion and the lower surface of the main body is not less than mm, a feeling of pressure is generated during mounting and the height is high, so that the body becomes unstable. External light is likely to enter the surface.

[0029] As described above, by setting the distance between the lower surface of the protruding portion and the lower surface of the main body to 2 to 4 mm, it is possible to prevent a feeling of oppression and the incidence of external light.

[0030] Further, the biological information measuring device according to the present invention is characterized in that, in any one of the biological information measuring devices according to the present invention, the protruding portion is formed so that the outer periphery is circular. That's what I do.

[0031] In the biological information measuring device according to the present invention, since the protruding portion is circular, when the main body is mounted on the wrist, the main body is pushed into the surface of the living body with an equal force. Therefore, good adhesion

[0032] Further, a biological information measuring device according to the present invention is characterized in that, in any one of the biological information measuring devices according to the present invention, the protruding portion is formed so that an outer edge is a curved surface. That's what I do.

[0033] In the biological information measuring device according to the present invention, since the outer edge of the protruding portion is formed into a curved surface, it is possible to further improve the adhesion when the main body is mounted on the wrist. Also, even if the device is worn for a long time, it is hard to make a compression mark, so that the device can be easily worn.

[0034] Further, in the biological information measuring device according to the present invention, in the biological information measuring device according to the present invention, the protruding portion is formed such that the central force of the lower surface is curved toward the outer edge. It is characterized by that.

[0035] In the biological information measuring device according to the present invention, since the central surface of the lower surface of the protruding portion is formed into a curved surface toward the outer edge, when the main body is attached to the wrist, the biological surface is deformed into a slipping force. The lower surface is mounted in a state where the contact pressure at the center of the lower surface is increased, so that the adhesion can be further improved. Also, even when worn for a long time, it is hard to make a compression mark, so it is easy to wear.

[0036] Further, in the biological information measuring device according to the present invention, in any one of the biological information measuring devices according to the present invention, the diameter of the protruding portion is set to 20 mm or less. And

[0037] In the biological information measuring device according to the present invention, since the diameter of the protrusion is 20 mm or less, the protrusion can be easily pressed against the surface of the living body with a light force.

[0038] Further, in the biological information measuring device according to the present invention, in any one of the biological information measuring devices according to the present invention, the ridge portion is provided at a position separated by 8 mm from a side surface of the protruding portion. The distance force between the lower surface of the ridge portion and the lower surface of the main body is set to mm.

[0039] In the biological information measuring device according to the present invention, the protruding ridge can be formed so that the side force of the protruding portion is also close to 8 mm, and can be suppressed to a height of 4 mm. As described above, since the ridge portions can be formed in a small space, the size of the main body, that is, the size of the entire device can be reduced.

The invention's effect

[0040] According to the biological information measuring device of the present invention, when the main body is attached to the wrist by the fixing means, the lower surface force of the main body is protruded, so that the surface of the living body and the lower surface of the protruded portion are reliably formed. By contact, the adhesiveness of the biosensor part is improved. Therefore, it is not necessary to fix the main body so that it is strongly pressed (pressed) against the surface of the living body by the fixing means. Therefore, even if worn for a long time, no discomfort is felt. In addition, since the adhesion of the living body sensor unit is improved, light irradiation and light reception can be performed efficiently, and biological information can be detected with high accuracy.

Brief Description of Drawings

FIG. 1 is a front view showing an embodiment of a biological information measuring device according to the present invention.

FIG. 2 is a side view showing a state where the biological information measuring device shown in FIG. 1 is mounted on a wrist.

FIG. 3 is a side view showing a state in which the biological information measuring device shown in FIG. 1 is worn on a wrist, viewed from a direction opposite to the direction shown in FIG. 2.

FIG. 4 is a perspective view showing a state in which the biological information measuring device shown in FIG. 1 is viewed obliquely upward.

FIG. 5 is a perspective view showing a state of the biological information measuring device shown in FIG. 1 as viewed obliquely from below.

6 is a sectional view taken along line CC of the biological information measuring device shown in FIG. 4. FIG. 7 is a cross-sectional arrow DD diagram of the biological information measuring device shown in FIG. 4.

FIG. 8 is a view showing a shape of a protrusion different from the biological information measuring device shown in FIG. 1, in a case where the outer periphery of the protrusion is circular.

FIG. 9 is a diagram showing a case where the protruding portion shown in FIG. 8 is formed so that the outer edge is a curved surface.

FIG. 10 is a view showing a case where the protruding portion shown in FIG. 8 is formed such that the center force of the lower surface is also curved toward the outer edge.

FIG. 11 is a view showing a case where a ridge is formed so as to sandwich the protrusion shown in FIG. 8.

FIG. 12 is a view showing a case where a ridge is formed so as to sandwich the protrusion shown in FIG. 9.

FIG. 13 is a view showing a case where a ridge is formed so as to sandwich the protrusion shown in FIG. 10.

Explanation of symbols

B: body surface, 1: living body upper measuring device, 2: housing (body), 2a: lower surface of body, 2b: upper surface of body, 3: fixing means, 4: protrusion, 4a: lower surface of protrusion , 4b… Side of protrusion, 5—LED (light emitting part), 6PD (light receiving part), 7 ··· Contact detection means, 7a, 7b… A pair of electrodes, 8… Biometric sensor part, 9… Data processing unit (biological information detection unit), 11 display unit, 13 rechargeable battery, 21 external connection terminal (charging means), 24 flexible board, 30 first band, 31 ··· Second band, 40 ··· Protrusion, 40a… Bottom surface of projection

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an embodiment of the biological information measuring device according to the present invention will be described with reference to FIGS. 1 to 7.

As shown in FIGS. 1 to 7, a biological information measuring device 1 of the present embodiment is a wristwatch type, and detects a pulse rate, which is biological information, when worn on a wrist (arm) A. It is.

[0045] The biological information measuring device 1 has a housing in which various electric components and electronic components are built.

(Main body) 2 and fixing means 3 for attaching the housing 2 to the wrist A with the lower surface 2a of the housing 2 facing the living body surface B side. In addition, a protrusion 4 protruding from the lower surface 2a is formed on the lower surface 2a of the housing 2.

An LED (Light Emitting Diode) (light emitting portion) 5 that irradiates light toward the living body in a state of being in contact with the living body surface B side, Of the reflected light from the living body, and a pulse signal (biological information signal) corresponding to the amount of light received PD (Photodetector) 6 (light receiving part), and LED5 and PD6 contact the surface B of the living body

A living body sensor unit 8 having contact detection means 7 for detecting whether or not

[0047] In the housing 2, a data processing unit (biological information detecting unit) 9 for detecting a pulse rate based on the generated pulse signal is provided.

[0048] The housing 2 is made of a metal material such as plastic or aluminum and has a predetermined thickness, for example, a substantially rectangular shape when viewed from above. A substantially square cover glass 10 is fitted into the center of the upper surface 2b of the housing 2, and a display section 11 for displaying the detected pulse rate and other various information is provided inside the cover glass 10. Are arranged.

As shown in FIGS. 6 and 7, a main board 12 is provided in the housing 2, and the data processing section 9, the display section 11, and the charging section are provided on the main board 12. A possible rechargeable battery 13, a memory 14 for recording a pulse rate, a sub-board 15, and other various electronic components are electrically connected by mounting or wiring.

[0050] The data processing unit 9 includes an IC component such as a CPU, and once amplifies the pulse signal generated by the PD 6 by an amplifier or the like, and then performs a predetermined process such as a fast Fourier transform process (FFT process). It has a function to detect the pulse rate by analyzing the processing result. In addition, the data processing unit 9 records the detected pulse rate in the memory 14 and displays it on the display unit 11 based on the input from each button 20 described later! . Further, the data processing section 9 has a function of comprehensively controlling other components.

The display unit 11 is, for example, a liquid crystal display such as an LCD (Liquid Crystal Display), and has a time display function of displaying the time counted by a crystal oscillator (not shown) in addition to the above-described pulse rate. And a function for displaying various other information. For example, time, date, day of the week, remaining power of the rechargeable battery 13 and the like can be displayed.

As shown in FIGS. 1 and 2, a plurality of buttons 20, for example, three buttons arranged on the upper surface 2 b of the housing 2 and below the display unit 11 are provided on the housing 2. Button 20 and one button 20 arranged on the side of housing 2 are provided. Press each of these buttons 20 By doing so, various operations can be performed. For example, operations such as starting and stopping the measurement of the pulse rate, switching the display between the pulse rate and the time, and transmitting the pulse rate data recorded in the memory 14 to an external device can be performed. Te ru.

Further, on the side surface of the housing 2, there is provided an external connection terminal (charging means) 21 for supplying power to the rechargeable battery 13 from outside such as a charger to charge the battery. Note that a cover or the like may be attached so as to cover the external connection terminal 21 to protect the external connection terminal 21. By doing so, it is possible to protect the external connection terminal 21 against the force of water droplets and dust, which is more preferable. In addition, not only the external connection terminal 21 but also a transformer and the like for supplying power in the charger and the housing 2 may be provided to charge the rechargeable battery 13 in a non-contact state. .

[0054] As shown in FIG. 5, the protruding portion 4 has a shape formed by combining three circles when viewed from below, that is, a center circle sandwiching two circles smaller in diameter than the circle from the left and right. It is formed in a shape like a keyhole connected to the. Further, the projecting portion 4 is formed such that the center position thereof is shifted from the center position of the housing 2 to the second band 31 described later. Accordingly, the biosensor section 8 disposed on the lower surface of the protruding section 4 is similarly disposed at a position shifted toward the second band 31. Further, the projecting portion 4 is formed such that the lower surface force of the housing 2 does not project perpendicularly, and the side surface 4b becomes a slope.

As shown in FIG. 7, a through-hole 22 is formed at the center of the lower surface 4 a of the protruding portion 4 so as to penetrate the outside and the inside of the housing 2. Glass 23 is fixed to housing 2. The LED 5 and PD 6 are arranged adjacent to each other in a direction perpendicular to the longitudinal direction of the housing 2 so as to be in contact with the inside of the cover glass 23. That is, the LED 5 and the PD 6 are configured to be dropped into the protrusion 4. As a result, the LED 5 and the PD 6 come as close as possible to the biological surface B.

At this time, the LED 5 and the PD 6 are mounted on one end of a flexible board 24 electrically connected to the sub-board 15 as shown in FIG. It is arranged in a state pressed toward the lower surface 2a side of 2. this child However, the LED 5 and the PD 6 are located on the lower surface 4a side of the protrusion 4 as much as possible. That is, the LED 5 and the PD 6 are as close to the living body surface B as possible. The sub-board 15 and the flexible board 14 are formed as an integral structure. Further, the flexible substrate on which the LED 5 and the PD 6 are mounted may be fixed to the lower surface 2a side of the housing 2 by a fixing member such as a double-sided tape.

The pulse signal generated by the PD 6 is sent to the data processing unit 9 via the flexible board 24, the sub board 15 and the main board 12.

[0058] The contact detecting means 7 has a pair of electrodes 7a and 7b, and the pair of electrodes 7a and 7b are arranged on the lower surface 4a of the protruding portion 4 with the LED 5 and the PD 6 interposed therebetween. I have. That is, the pair of electrodes 7a and 7b, the LED 5 and the PD 6 are arranged in a line in a direction orthogonal to the longitudinal direction of the housing 2. Further, the pair of electrodes 7a and 7b are provided so that the tips thereof slightly protrude from the lower surface 4a of the protruding portion 4, and are provided such that the base ends thereof are electrically connected to the sub-substrate 15. .

[0059] The pair of electrodes 7a and 7b has a function of detecting whether or not the electrode 7a is in contact with the biological surface B based on the potential difference between the electrodes. The data processing unit 9 is set to receive the detection result and, for example, to control the operation of the LED 5 so that the LED 5 emits light when it is detected that the LED 5 is in contact with the biological surface B. I have. Note that the present invention is not limited to this case. For example, it may be set so that the FFT processing is not performed when it is detected that the FFT process is not in contact with the biological surface B.

[0060] The fixing means 3 has a first band 30 and a second band 31 that are attached to the housing 2 at the base end and can be attached to the wrist A. The first band 30 and the second band 31 are provided in the longitudinal direction of the housing 2 so as to face each other with the housing 2 interposed therebetween. Further, both bands 30, 31 are formed of a stretchable elastic material.

[0061] The first band 30 is provided with a buckle 30a and a tanda 30b at the tips. Further, the second band 31 has a plurality of insertion holes 3 la into which the above-described tunders 30 b are inserted, along the longitudinal direction of the second band 31. Thus, the lengths of the first band 30 and the second band 31 can be adjusted according to the thickness of the wrist A of the user. [0062] A case in which the biological information measuring device 1 configured as described above detects a pulse rate while worn on the wrist A will be described.

First, as shown in FIGS. 2 and 3, both bands 30 and 31 are wrapped around the wrist A of the user, and the band 30b of the first band 30 is wound according to the size of the wrist A. Insert the second band 31 into the insertion hole 31a, and attach the housing 2 to the wrist A. When the housing 2 is mounted on the wrist A, the projection 4 projects beyond the lower surface 2a of the housing 2, so that the living body surface B and the lower surface 4a of the projection 4 are in close contact with each other. Therefore, it is not necessary to mount the housing 2 so as to tighten the wrist A, and the lengths of both the bands 30 and 31 may be adjusted so as to tighten with a predetermined force. In particular, since the protruding portion 4 has a sloped side surface 4b, the living body surface B is smoothly deformed according to the outer shape of the protruding portion 4, so that it is easy to adhere!

[0064] When the living body surface B and the lower surface 4a of the protruding portion 4 are in close contact with each other, that is, when the living body surface B contacts the lower surface 4a of the protruding portion 4, the pair of electrodes 7a and 7b comes into contact with the living body surface B. In particular, since the pair of electrodes 7a and 7b are arranged so as to slightly protrude from the lower surface 4a of the protruding portion 4, the electrodes 7a and 7b can easily come into contact with the living body surface B. When the pair of electrodes 7a and 7b come into contact with the living body surface B, discharge is performed through the living body surface B, and the voltage between both electrodes decreases. In response to this voltage drop (for example, a drop below a certain threshold), the data processing unit 9 detects that the pair of electrodes 7a and 7b is surely in contact with the biological surface B. That is, it is detected that the living body sensor section 8 including the LED 5 and the PD 6 is securely in contact with the living body surface B. In particular, since the pair of electrodes 7a and 7b are disposed with the LED 5 and the PD 6 interposed therebetween, it is possible to detect with high accuracy whether the LED 5 and the PD 6 are in contact with the biological surface B.

When detecting that the LED 5 and the PD 6 are in contact with the living body surface B, the data processing unit 9 causes the LED 5 to emit light toward the living body. Some of the emitted light is absorbed by blood vessels, for example, by hemoglobin, and some of the other light is reflected by living tissue. The PD 6 receives the reflected light, generates a pulse signal (biological information signal) according to the amount of the received light, and outputs the pulse signal to the data processing unit 9. In other words, the amount of reflected light of the light emitted from the LED 5 fluctuates in accordance with the blood flow fluctuation in the arteries and arterioles inside the wrist A (living body). The reflected light can be received. Thus, the PD 6 can generate a pulse signal. [0066] After amplifying the sent pulse signal, the data processing unit 9 performs predetermined processing such as FFT processing, and then performs analysis to detect the pulse rate. Then, the data processing unit 9 records the detected pulse rate in the memory 14 and displays the detected pulse rate on the display unit 11 based on the operation of each button 20.

[0067] The user can easily confirm the pulse rate detected on the display unit 11 by pressing each button 20 when necessary, so that it is easy to use. In addition, the user can operate the buttons 20 to check other information other than the pulse rate, such as the time and the remaining power of the rechargeable battery 13, on the display unit 11. ,.

[0068] As described above, the user tightens the housing 2 with the two bands 30 and 31 with a predetermined force and mounts the housing 2 on the wrist A. Therefore, even if the user wears the housing 2 for a long time, the user may feel a feeling of oppression. Because there is no, you do not feel uncomfortable.

[0069] Further, when the user holds something or performs some work, for example, the thickness (diameter) of the wrist A (arm) changes due to the movement of muscle. Also in this case, since the living body sensor section 8 is disposed on the lower surface 4a of the projecting section 4 protruding from the lower surface 2a of the housing 2, the contact (adhesion) between the living body sensor section 8 and the living body surface B is improved. The decline can be minimized. In particular, since the first band 30 and the second band 31 can be expanded and contracted, they can be expanded and contracted according to the change in the thickness of the wrist A, so that a decrease in adhesion can be suppressed.

[0070] Therefore, even if the thickness of the wrist A changes, the state in which the LED 5 and the PD 6 are in contact with the living body surface B can be maintained, so that the pulse rate can always be accurately detected. Therefore, the detection accuracy of the pulse rate can be improved. Further, the LED 5 and the PD 6 are dropped into the protruding portion 4 and are pressed toward the lower surface 2a side of the housing 2 by the elasticity of the flexible substrate 24 to be as close as possible to the living body surface B. Also, the pulse rate can be detected with high accuracy.

[0071] Further, in order to check various information displayed on the display unit 11, the user holds the display unit 11 in front of his / her eyes with the back of the hand facing inward and the arm horizontally. However, even if the housing 2 is displaced to the ground side, that is, the second band 31 side due to gravity, the biosensor section 8 is moved toward the base end side of the second band 31 from the center position of the housing 2. The contact between the living body sensor section 8 and the living body surface B is prevented from being reduced. Can. The same applies when the arm is turned to the ground side, that is, when the arm is lowered.

When charging the rechargeable battery 13 with electric power, for example, the charging can be performed by connecting a charging cord or the like connected to a charger to the external connection terminal 21, and a normal battery can be charged. Need not be provided separately. Accordingly, maintenance costs can be reduced. An audio output means such as a buzzer for outputting an audio is provided in the housing 2, and when the charged amount of the rechargeable battery 13 decreases to near "0", an audio is output to charge the battery (charging time). ) May be configured to be notified.

As described above, according to the biological information measuring device 1 of the present embodiment, when the main body is attached to the wrist A by the fixing means 3, the projection 4 is formed from the lower surface 2a of the housing 2 Because of the protruding portion, the living body surface B and the lower surface 4a of the protruding portion 4 are surely in contact with each other, and the adhesion of the biosensor portion 8 is improved. Therefore, the fixing means 3 does not need to fix the housing 2 so as to strongly press (press) the living body surface B as in the related art. Therefore, even if worn for a long time, no discomfort is felt. In addition, since the adhesion of the living body sensor unit 8 is improved, light irradiation and light reception can be performed efficiently, and the pulse rate can be detected with high accuracy.

The technical scope of the present invention is not limited to the above embodiment, and various changes can be made without departing from the spirit of the present invention.

[0075] For example, in the above embodiment, the force of the protrusion 4 in the shape of a keyhole formed by combining three circles is not limited to this, and the shape is free if it protrudes from the lower surface 2a of the housing 2. It is okay to form.

For example, as shown in FIG. 8, the protrusion 4 may be formed so that the outer periphery is circular.

The projection 4 shown in FIG. 8 has a diameter set to 20 mm, and is formed such that the lower surface 4a of the projection 4 and the lower surface 2a of the housing 2 have a distance of 3 mm.

By making the protruding portion 4 circular, the protruding portion 4 is pushed into the living body surface B with a uniform force when the housing 2 is mounted on the wrist A, so that the adhesion is good. At this time, since the diameter of the protruding portion 4 is 20 mm or less, the protruding portion 4 can be pressed with a light force, and the feeling of oppression can be further reduced. Here, generally, the difference between the maximum diameter and the minimum diameter of the wrist is 3 mm . Therefore, as shown in FIG. 8, by setting the distance between the lower surface 4a of the protruding portion 4 and the lower surface 2a of the housing 2 to 3 mm, it is possible to cope with a change in the thickness of the wrist, and the lower surface 4a of the protruding portion 4 Adhesion can be improved without creating a gap between the living body surface B. Therefore, the adhesion of the living body sensor section 8 can be improved.

Note that the distance between the lower surface 4a of the protrusion 4 and the lower surface 2a of the housing 2 is not limited to the force of 3 mm set to 3 mm, but may be set to a range of 2 mm to 4 mm. If it is 2 mm or less, the step is small, a gap is formed between the living body surface B, and external light is likely to enter. On the other hand, if it is 4 mm or more, a sense of oppression is generated and the height is high, which makes the body unstable, and when it is inclined, a gap is formed between the living body surface B and external light is likely to enter. That is, as shown in FIG. 8, by setting the distance between the lower surface 4a of the protruding portion 4 and the lower surface 2a of the housing 2 within a range of 2 mm to 4 mm, it is possible to prevent a feeling of oppression and the incidence of external light. .

Further, the projecting portion 4 shown in FIG. 8 may be formed so that the outer edge is a curved surface as shown in FIG. By doing so, the adhesion can be improved, and even if the device is worn for a long time, it is hard to make a compression mark, so that the device can be easily worn.

Further, as shown in FIG. 10, the central force of the lower surface 4a of the protruding portion 4 may be formed so as to be curved toward the outer edge. By doing so, the surface of the living body B is smoothly deformed, and it can be mounted with the contact pressure at the center of the lower surface 4a increased, so that the adhesion can be further improved and the mounting surface can be further hardly pressed. easy.

As shown in FIG. 11, the lower surface 2a of the housing 2 projects from the lower surface 2a of the housing 2 at a predetermined distance, ie, 8 mm, from the side surface 4b of the protrusion 4 with the protrusion 4 interposed therebetween. A protruding ridge 40 may be provided. Note that the protrusion 4 shown in FIG. 11 has the same shape as that shown in FIG.

The distance between the lower surface 40a of the ridge 40 and the lower surface 2a of the housing 2 is set to 4 mm, which is slightly smaller than the distance (3 mm) between the lower surface 4a of the protrusion 4 and the lower surface 2a of the housing 2. It is getting higher.

[0083] With this configuration, when the housing 2 is mounted on the wrist A, the living body enters the 8 mm gap formed between the protrusion 4 and the ridge 40. , Overhang 4 It contacts the lower surface 4a and the lower surface 40a of the ridge 40. At this time, the ridges 40 come into contact with the living body on the outside of the protrusion 4 and come into contact with the living body before the protrusion 4. Therefore, the living body can be brought into contact with the lower surface 4a of the protruding portion 4 in a stable state, and the contact pressure can be made uniform with respect to the lower surface 4a of the protruding portion 4. Therefore, the pulse rate can be stably detected over a long period of time. In addition, since the protruding portion 40 can be formed in the vicinity of the protruding portion 4, that is, in a small space, the size can be reduced even if the protruding portion 40 is provided.

Note that, as shown in FIG. 12 and FIG. 13, the above-mentioned ridge may be configured in combination with the above-mentioned protrusion 4 shown in FIG. 9 and FIG. Further, the ridge may be formed at a position separated from the side surface of the protrusion by a predetermined distance so as to surround the periphery of the protrusion.

[0085] Further, in the above embodiment, the pulse rate is described as an example of the biological information. However, the present invention is not limited to the pulse rate, and may be any biological information.

[0086] Further, although the contact detection means has a pair of electrodes, the contact detection means is not limited to a pair and may have a plurality of electrodes. In this case, it may be set so as to detect whether or not contact has occurred based on the potential difference between the electrodes.

[0087] Further, although the biosensor section is configured to be shifted from the center position of the housing to the base end side of the second band, it may be formed so as to be shifted to the base end side of the first band side. Absent. In other words, the design may be made according to the relationship between both bands and the display unit.

[0088] Further, a function such as a wireless communication unit capable of wirelessly communicating with another electronic device may be added to the housing. By doing so, the pulse rate recorded in the memory can be transmitted to an external electronic device by wireless communication such as Bluetooth, and various information can be obtained in the memory.

Industrial applicability

[0089] According to the biological information measuring device of the present invention, when the main body is attached to the wrist by the fixing means, the lower surface force of the main body is protruded, so that the living body surface and the lower surface of the protruded portion are reliably formed. By contact, the adhesiveness of the biosensor part is improved. Therefore, it is not necessary to fix the main body so that it is strongly pressed (pressed) against the surface of the living body by the fixing means. Therefore, even if worn for a long time, no discomfort is felt. In addition, since the adhesiveness of the living body sensor has been improved, it is possible to irradiate and receive light efficiently, Biological information can be detected.

Claims

The scope of the claims

Body and

A projecting portion formed by projecting the lower surface force of the main body;

Fixing means for attaching the main body to the arm with the lower surface of the main body facing the living body surface side, a light emitting section for irradiating light toward the living body in contact with the living body surface, and the light emitting section A light receiving unit that receives the reflected light of the biological force from the irradiated light and generates a biological information signal corresponding to the amount of received light, and a force that the light emitting unit and the light receiving unit are in contact with the surface of the living body. A biological sensor unit having contact detection means for detecting whether or not

A biological information detecting unit provided on the main body and configured to detect biological information based on the biological information signal;

The biological information measuring device, wherein the biological sensor is disposed on a lower surface of the protrusion.

The biological information measuring device according to claim 1,

On the lower surface of the main body, at least the side surface force of the protruding portion and a convex ridge formed so as to protrude are provided at positions spaced apart by a predetermined distance from the side surface force of the protruding portion. And a distance between the lower surface of the main body and the lower surface of the main body is set to be equal to or longer than a distance between the lower surface of the protrusion and the lower surface of the main body.

In the biological information measuring device according to claim 1 or 2,

The contact detecting means has at least a pair of electrodes, and detects whether or not the light emitting unit and the light receiving unit are in contact with the surface of the living body based on a potential difference between the pair of electrodes. Characteristic biological information measuring device.

The biological information measuring device according to claim 3,

The biological information measuring device, wherein the pair of electrodes are arranged so as to sandwich the light emitting unit and the light receiving unit therebetween.

The biological information measuring device according to any one of claims 1 to 4,

Electrically connecting the light emitting unit and the light receiving unit to the biological information detecting unit; Flexible substrate,

The living body information measuring device, wherein the flexible substrate is provided in the main body so as to press the light emitting portion and the light receiving portion toward the lower surface side of the main body by its own elasticity. .

[6] The biological information measuring device according to any one of claims 1 to 5,

A biological information measuring device comprising a display unit for displaying detected biological information on an upper surface of the main body.

[7] The biological information measurement device according to any one of claims 1 to 6,

The fixing means includes a first band and a second band, the base end of which is attached to the main body and which can be attached to an arm.

The first band and the second band are arranged to face each other with the main body interposed therebetween, and are formed of a stretchable elastic material! A biological information measurement device characterized by the following features:

[8] In the biological information measuring device according to claim 7,

The biological information measuring device, wherein the biological sensor is disposed at a position shifted from a center position of the main body to a base end side of the first band or the second band.

[9] The biological information measuring device according to any one of claims 1 to 8,

The main body is provided with a rechargeable rechargeable battery and charging means for charging the rechargeable battery with electric power! A biological information measuring device, characterized in that:

[10] The biological information measuring device according to any one of claims 1 to 9,

The distance between the lower surface of the protruding portion and the lower surface of the main body is set to 2 to 4 mm.

[11] The biological information measuring device according to any one of claims 1 to 10,

The biological information measuring device, wherein the protruding portion is formed so that an outer circumference is circular.

[12] The biological information measuring device according to claim 11, wherein

The biological information measuring device, wherein the protrusion is formed so that an outer edge is a curved surface. [13] The biological information measuring device according to claim 11, wherein

The protruding portion is formed so that the center force of the lower surface is also curved toward the outer edge, and the protrusion is formed as a curved surface.

[14] The biological information measuring device according to any one of claims 11 to 13,

The biological information measuring device, wherein the diameter of the protrusion is set to 20 mm or less.

[15] The biological information measuring device according to any one of claims 2 to 14,

The ridge portion is provided at a position 8 mm apart from the side force of the protrusion, and is set to a distance force S4 mm between the lower surface of the ridge portion and the lower surface of the main body. apparatus.