JP2002159457A - Body-worn measuring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a body-worn measuring device which gives less discomfort to a wearer and detects conditions of the inside and the surface of the body accurately. SOLUTION: A body-worn measuring device 1 is equipped with the following parts: A sensor 4 has a piezoelectric element for transmitting which sends ultrasound to the radial artery and a piezoelectric element for receiving which catches reflective waves produced when the radial artery reflects the ultrasound. A belt 50 secures the sensor 4 to a subject. Non-slip parts 20, 20 are fixed to and placed lengthwise along the both sides of the belt 50 where the sensor 4 comes in a manner that the non-slip parts 20, 20 make contact with the surface of the subject's body, and work against shear displacements between the sensor 4 and the surface of the body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wearable measuring instrument fixed to a body surface of a subject and detecting a pulse wave or the like from the state of the body or the body surface. The present invention relates to a wearable measuring device capable of accurately detecting the state of a body or a body surface.

[0002]

2. Description of the Related Art Wearable measuring instruments that fix and use a sensor for detecting the state of the inside or the body of a subject on the body of the subject are well known. In such a wearable measuring instrument, a sensor such as a pressure sensor or a photoelectric sensor is fixed to the body surface of the subject, the condition of the body or the body surface is detected by the sensor, and a pulse wave or the like is detected from the result. For example, in a wristwatch type pulse wave meter, a piezo-type piezoelectric element (PZT) is arranged on an artery as a sensor, and the sensor detects a pressure change of the epidermis (displacement of the epidermis due to pressure) due to a pressure change inside the artery. The pulse wave is detected by detecting the pulse wave number, transmitting ultrasonic waves toward the artery using the piezoelectric element as a sensor, detecting the frequency of the reflected wave that changes by the Doppler effect due to the blood flow, and detecting the pulse wave.

In such a wearable measuring instrument, a sensor section is held at a predetermined position in order to ensure good detection sensitivity and measurement accuracy, as in the above-described wristwatch type pulse wave meter and the like.
Some things need to be kept in place. As a technique for holding the sensor unit at a predetermined position, there is a technique described in Japanese Patent Application Laid-Open No. Hei 5-26173 shown in FIG. In the technique described in Japanese Patent Application Laid-Open No. Hei 5-261773, as shown in FIG.
Belt 420 having a pulse wave detection probe 360
And a housing 160 comprising As shown in FIG. 19B, the mounting belt 420 includes an adhesive sheet 480 on one surface of a sponge rubber sheet 440 and an outer peripheral fastener 460 on the other surface, and has a notch 500 in a substantially central portion. Are formed. Housing 160
Is a fixing band 560 removably adhered to the outer fastener 460 of the mounting belt 420, and the pulse wave detection probe 3
An air bag 220 is provided for pressing the air bag 60 from the rear side.
Then, while positioning the notch 500 at an appropriate position, the adhesive sheet 480 is adhesively fixed to the body surface 260 of the subject,
With the pulse wave detection probe 360 arranged in the notch 500, the fixing belt 560 of the housing 160 is attached to the wearing belt 4.
20 is fixed to the outer peripheral fastener 460. This allows
The pulse wave detection probe 260 is supported in the notch 500, and is pressed against the body surface by the air bladder 220 while being held at a predetermined position.

[0004] Also, a technology for holding a processing unit for obtaining predetermined information based on a detection result of the sensor unit and a display unit for displaying acquired information, which is not a sensor unit, inside a device main body at a predetermined position. JP-A-8-299290
There is a technique described in Japanese Unexamined Patent Application Publication No. HEI 9-86. Japanese Patent Application Laid-Open No. 8-29929
In the technique described in Japanese Patent Publication No. 0, there is provided a rotation stopping portion which is bent from the case of the apparatus main body toward the inside at the time of mounting so as to be bent in a substantially rectangular shape, and the main body case is provided by the rotation stopping portion. The rotation of is regulated.

[0005]

However, the conventional mounting type measuring instrument as described above has the following problems. That is, the wearable measuring device may be used when the wearer is exercising or moving his / her body.
According to the technology described in Japanese Patent No. 261073, an adhesive sheet 480 is used.
May be peeled off by body movement or sweat. Also, there is a problem that the adhesive sheet 480 cannot be used over and over again. Further, the test subject is given an adhesive sheet 48
Since 0 is adhered, the subject may be uncomfortable. In addition, the adhesive sheet 480 is first adhered to an appropriate position, and then the pulse wave detection probe 360 is cut out.
It is necessary to mount the entire device in multiple stages, such as mounting the housing 160 and fixing the housing 160, which takes time and effort. Further, in the technique described in Japanese Patent Application Laid-Open No. 8-299290, even if the rotation of the main body case is restricted, if the belt is loosened, the position of the sensor may be shifted. Furthermore, even if the displacement of the case of the main body and the rotation stopper in the bending direction can be avoided, the displacement in the same direction as the bending direction cannot be avoided. In addition, the sensor unit that is easily affected by even a slight positional shift needs to hold the position exactly, and this conventional technique is used to hold the position of the sensor unit that detects the state of the subject's body or body surface. However, even if the rotation stop portion is provided in the sensor portion, the mounting accuracy required for the sensor portion may not be maintained. in addition,
It is necessary to provide a bent part in a place where the curve of the body is large, and depending on the arrangement position of the sensor, the distance from the measurement position by the sensor to the bent part is large, the detent part becomes large, and it is mounted. May cause discomfort to the subject.

Accordingly, an object of the present invention is to provide a wearable measuring instrument which can be repeatedly worn by an easy operation without giving a discomfort to a wearer, and which can accurately hold a sensor portion on a body surface. And

[0007]

According to the present invention, there is provided a sensor unit for detecting the state of the inside or surface of a subject from the body surface of the subject, support means for fixing and supporting the sensor unit to the subject, A wearable measurement, comprising: a non-slip portion provided on the support means so as to be in contact with the body surface of the subject around the sensor portion so as to be able to resist displacement in a shear direction with the body surface. The object is achieved by providing an apparatus (first configuration). In the wearable measuring device according to the first configuration, the supporting means includes a belt wound around and fixed to a body surface of the subject, and the non-slip portion extends in a width direction extending in a width direction of the belt. A wearable measuring device (second configuration) including at least one of a stopper and a lengthwise non-slip portion extending in the length direction of the belt can be provided. In the wearable measuring device having the second configuration, at least one of the width direction non-slip portion and the length direction non-slip portion has the sensor interposed at two or more positions in a belt length direction. The mounting type measuring device (third configuration) may be arranged. The wearable measuring device according to any one of the first to third configurations is a wearable measuring device (fourth configuration) in which the non-slip portion is a protrusion protruding from the support means toward the body surface. be able to. Further, in the wearable measuring device according to any one of the first to third configurations, the non-slip portion may be disposed on the body surface side of the support means and the body may be higher than the sensor portion and the support means. A wearable measurement device (fifth configuration) that is a high friction layer having a high friction against the surface can be provided.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIGS. FIG.
FIG. 2 is a perspective view showing a state in which a pulse wave detecting device as one embodiment of the wearable measuring device of the present invention is mounted on a subject. FIG. FIG. 5 is a side view as viewed from the base of the arm toward the hand. As shown in FIGS. 1 and 2, a wearable measuring device (pulse wave detection device) 1 of the present embodiment is brought into contact with a body surface of a subject, and a radius as a condition inside the body of the subject from the body surface of the subject. The apparatus includes a sensor unit 4 for detecting a blood flow in an artery, and a belt 50 as support means for fixing and supporting the sensor unit 4 to a subject. As shown in FIG. 2, the pulse wave detection device 1 according to the present embodiment is fixed to the belt 50 so as to be able to abut on the body surface of the subject around the sensor unit 4, and Non-slip portions 20 and 20 that resist displacement in the shear direction are provided.

The pulse wave detecting device 1 according to this embodiment will be described in more detail. As shown in FIG. 2, the belt 50 is divided into two portions 50b and 50c, and a processing unit 3 is provided between the two portions. Are connected. The belt 50 is wound around the wrist of the subject, and is fixed around the wrist 2 of the subject by connecting both ends by the fasteners 6. The processing unit 3 includes a display unit 33 on the outer peripheral surface side when the belt 50 is mounted. The sensor unit 4 is fixed to the inner peripheral surface side when the belt 50 is worn, and when the processing unit 3 is attached to the left (or right) wrist 2 of the wearer with the processing unit 3 facing the back of the hand, the sensor unit 4
However, it is located outside the radial artery 22 of the wearer and is fixed.

FIG. 3 is an exploded perspective view showing a schematic configuration of the sensor section 4, and FIG. 4 is an enlarged perspective view of a main part showing the sensor section 4 and its vicinity. As shown in FIG. 3, the sensor unit 4 includes a lower substrate 44 having electrodes (not shown), and an upper substrate 48 superposed on the lower substrate 44 and having substantially the same shape as the lower substrate 44. ing. Then, the lower substrate 44
A pair of piezoelectric elements (the transmitting piezoelectric element 41 and the receiving piezoelectric element 42) are provided between the lower substrate 4 and the upper substrate 48.
4 are fixed so as to be in contact with the four electrodes, and the piezoelectric elements 41 and 42 are sandwiched between the lower substrate 44 and the upper substrate 48. The transmitting piezoelectric element 41 and the receiving piezoelectric element 42 are PZT having an outer shape of 2 × 4 mm and a thickness of 0.2 mm (resonance frequency 9.6 MHz). On both sides in the thickness direction of the transmitting piezoelectric element 41 and the receiving piezoelectric element 42,
An electrode (not shown) is formed. Each of these electrodes is connected to a signal line (not shown) embedded in the belt 50 via the lower substrate 44.

The lower substrate 33 is a glass substrate having an outer shape of 10 × 11 mm and a thickness of 0.5 mm. The upper substrate 48 is made of epoxy resin, acrylic resin, or the like, sandwiches and protects the piezoelectric elements 41 and 42, and acoustically matches the ultrasonic waves between the piezoelectric elements 41 and 42 and the body surface. It functions as a layer. When the upper substrate 48 is made to function as an acoustic matching layer, its material is the acoustic impedance Zm, the acoustic impedance Zl of the living body and the acoustic impedance Z of the piezoelectric elements 41 and 42.
It must be set to a value between c and c. The acoustic impedance is a value indicating the easiness of propagation of a sound wave, and the value changes depending on the Young's modulus and density of the material. The ideal acoustic impedance Zm of the acoustic matching layer can be expressed by the following equation (1): Zm = (Zc × Zl) ＾ (1/2) (1) (where ＾ (1/2) is (The following ＾ represents the exponent with respect to the preceding numerical value.) Then, when the following known formulas (2) and (3) are substituted into the formula (1), the value of Zm is obtained as in the formula (4). Zl = 1.5 × 10 ＾ 6 (N · sec / cubic meter) (fat) (2) Zc (when PZT is used) = 30 × 10 ＾ 6 (N · sec / cubic meter) (3) Zm ≒ 6.7 × 10 ＾ 6 (N · sec / cubic meter) (4) The thickness of the acoustic matching layer is preferably about 程度 of the wavelength of the ultrasonic wave propagating through the acoustic matching layer, and is about 100 μm. Is appropriate. By applying a heat or ultraviolet curable resin by spin coating or bar coating and curing the resin by heat or ultraviolet light, a uniform upper substrate (acoustic matching layer) having a constant thickness can be provided. In the present embodiment, the acoustic impedance is about 3 × 10 ＾ 6 (N ·
(sec / cubic meter) of an epoxy resin having a thickness of 100 μm.

The transmitting piezoelectric element 41 is connected to the processing unit 3 via a signal line in which the electrodes are embedded in the substrate and the belt 50.
Is connected to the drive circuit 32 of FIG. And the driving circuit 3
When a specific drive signal is applied to the electrodes on both sides from 2, the device is excited to generate an ultrasonic wave of a specific frequency and transmit it to the subject. In this embodiment, 9.6 is used.
However, when the pulse wave detecting device 1 is arranged on a watch, the transmitting frequency is set to 32 kHz which is common to the transmitting frequency of the watch. Also, it is possible to reduce the number of parts of the pulse wave detection device 1 and to reduce the manufacturing cost.

As shown in FIG. 4, the belt 50 is provided with anti-slip portions 20 on the surface on the wearer side (the inner peripheral surface in the worn state, the surface on the same side as the sensor unit 4). It is formed to protrude toward the body surface. This non-slip part 2
0 and 20 are at two places in the length direction of the belt 50,
It is arranged with the sensor unit 4 in between. Non-slip part 2
Numerals 0 and 20 each have a shape extending in the width direction of the belt 50, tapering from the surface side of the belt 50 to the wearer side, and a tip end (free end) on the wearer side is rounded. Shape. This non-slip part 20, 2
In the case of 0, a columnar member having a predetermined cross-sectional shape is formed of an elastic material such as rubber, and this columnar member can be fixed to the belt 50 and provided.

FIG. 5 is a block diagram showing the configuration of the pulse wave detector 1 of FIG. As shown in FIG. 5, the processing unit 3 processes the signal based on the ultrasonic wave received by the drive circuit 32 for transmitting the drive signal for driving the transmission piezoelectric element 41 and the reception piezoelectric element 42, thereby processing the pulse wave. An arithmetic processing unit 31 for obtaining a waveform and a pulse rate, and a display unit 33 for displaying the pulse waveform and the pulse rate acquired by the arithmetic processing unit 31 are provided.

The arithmetic processing unit 31 executes various processes relating to pulse detection by executing a processing program stored in a storage area (not shown) provided therein. Specifically, a drive signal is output from the drive circuit 32 to the transmitting piezoelectric element 41 of the sensor unit 4. The pulse wave is detected by comparing the frequency of the ultrasonic wave transmitted from the transmitting piezoelectric element 41 with the frequency of the ultrasonic wave received by the receiving piezoelectric element 42 and changed by the Doppler effect of the blood flow. Form a signal. When an ultrasonic wave is transmitted to the radial artery or the ulnar artery, a Doppler effect occurs due to the blood flow, and the frequency of the reflected wave changes with respect to the transmitted ultrasonic wave. Then, by detecting this change, a change in the blood flow velocity is detected. Since the change in the blood flow velocity is synchronized with the pulse, information on the pulse can be detected. Further, the time interval between the peaks of the pulse wave signal is set to a predetermined number of times (for example, three times, five times).
, 7 times, 10 times, etc.), and the pulse wave rate V (= pulse rate, heart rate) for one minute from the average time T of each measurement time is obtained according to the following equation (5). V = 60 / T (5) The pulse wave signal and the pulse wave detection result such as the pulse wave number V are output to the display device. The present invention is not limited to the case where the pulse wave number is obtained from the average time T between pulse waves.
The pulse wave number w existing within the second) may be detected, and the pulse wave number V for one minute may be obtained by the following equation (6). V = w × (60 / t) (6)

The driving circuit 32 has a transmitting source of a vibrator such as a crystal, generates an alternating current having a frequency corresponding to the natural frequency, divides this frequency by a fraction, and generates a frequency of 32 KH.
Obtain a high frequency of z. Then, in accordance with an instruction from the arithmetic processing unit 31, a specific drive signal is transmitted to the transmitting piezoelectric element 41 via a signal line to drive the transmitting piezoelectric element 41. Thereby, ultrasonic waves are transmitted from the transmitting piezoelectric element 41 toward the body surface of the wearer. The display unit 33 is composed of a liquid crystal display device or the like, and calculates and processes the pulse wave waveform and the pulse rate.
The image of the pulse wave detection result input from step 1 is displayed. The display unit 33 may electronically display the pulse wave number on a panel.

The pulse wave detecting device 1 having the above-described configuration is arranged on the body surface so that the sensor unit 4 is located substantially above the radial artery 22 when measuring the pulse wave, Around the wrist 2. FIG. 6 is a side view of a main part of the state in which the pulse wave detection device 1 is worn, as viewed from the base of the arm of the subject to the hand. In this state, the non-slip portions 20, 20, together with the sensor portion 4, are attached to the wrist 2 on both sides of the sensor portion 4 in the length direction of the belt 50.
Abuts on the surface. The non-slip portions 20 and 20 make long contact with the wrist 2 in the length direction thereof at two places in the circumferential direction of the wearer's wrist 2 with the sensor unit 4 interposed therebetween.
In the present embodiment, since the non-slip portions 20 are formed of an elastic member, the non-slip portions 20 and 20 are deformed according to the surface shape of the subject's wrist 2 and come into elastic contact.

In this state, when the pulse wave detecting device 1 is turned on, the driving circuit 32
, And an ultrasonic wave having a frequency of 32 KHz is transmitted from the transmitting piezoelectric element 41 toward the radial artery 22. The ultrasonic waves transmitted toward the radial artery 22 are reflected by the blood flow in the radial artery 22. Ultrasound is attenuated and frequency modulated by the blood flow. The degree of deviation of the frequency modulation varies depending on the blood pressure. Therefore, the reflected wave has a waveform that is frequency-modulated according to the blood pressure.

The reflected wave is received by the receiving piezoelectric element 42. In the receiving piezoelectric element 42, a reception signal is generated based on the received reflected wave. This received signal is transmitted from the receiving piezoelectric element 42 to the arithmetic processing unit 31 of the processing unit 3 via the signal line 71. The arithmetic processing unit 33 detects the frequency deviation of the received signal by the demodulation method of the frequency modulation wave. That is, a change in the reception frequency is extracted as a voltage change by the detection circuit, amplified by the amplifier circuit, and the amplified voltage waveform is shaped into a pulse wave by the waveform shaping circuit. The pulse rate is counted based on the detection signal, and a pulse wave signal is formed. The pulse rate and pulse wave signal counted by the arithmetic processing unit 31 are displayed on the display unit 33.
And the display unit 33 displays a pulse rate and a pulse wave signal.

When the pulse wave detecting device 1 of the present embodiment is worn, there is a possibility that the belt 50 tries to rotate with respect to the wrist due to the operation of the wearer or the like. However, on both sides of the sensor unit 4 in the length direction of the belt 50, the non-slip portions 2 are provided.
Since 0 and 20 resist displacement caused by a force in the rotation direction (shear direction with the body surface) from the belt 50, a force in the rotation direction of the belt 50 is hardly applied to the sensor unit 4. As a result, the sensor unit 4 is hardly affected by the operation of the wearer, and is held at the position when worn.

As described above, the pulse wave detecting device 1 of the present embodiment
Then, the non-slip portions 20 and 2 fixed to the belt 50
Since 0 is in contact with the body surface of the subject around the sensor unit 4 and resists displacement in the shear direction with the body surface, the sensor unit 4 is hardly displaced and is held at a predetermined position. Further, a shear stress is hardly generated in the sensor section 4, and a decrease in durability can be prevented. In particular, in the present embodiment, the anti-slip portion 2
Reference numerals 0 and 20 denote width-direction non-slip portions extending in the width direction of the belt 50. Therefore, in the mounted state, the sensor in the circumferential direction of the wrist 2 satisfactorily resists the circumferential displacement of the wrist 2. The displacement of the part 4 is particularly effectively prevented. When a non-slip portion (widthwise non-slip portion) extending in the width direction of the belt 50 is provided, as in the present embodiment, the non-slip portion extends over half of the width of the belt 50. Preferably, it is provided. Thereby, it is possible to prevent the sensor unit 4 from floating when the belt 50 is shifted in the arm length direction.

In this embodiment, the non-slip portions 20, 20
Are arranged at two or more positions in the length direction of the belt 50 with the sensor unit 4 interposed therebetween, so that even if a force in the circumferential direction of any of the adduction and abduction of the wrist 2 is applied to the belt 50, In addition, it is possible to prevent the sensor unit 4 from floating from the body surface. If the non-slip portions 20 are arranged only on one side in the circumferential direction of the wrist with respect to the sensor portion 4,
From the opposite side of the non-slip portions 20, 20 with respect to the sensor portion 4,
When a force is applied to the belt 50, the belt 50 may shift in the direction of the applied force, and may become slack in front of the non-slip portions 20, 20, and the sensor unit 4 may float from the body surface. In the present embodiment, the non-slip portions 20, 20 protrude from the inner peripheral surface of the belt 50 and are formed in a convex shape with respect to the body surface of the wearer. Therefore, the area of the non-slip portions 20, 20 is minimized. It is possible to surely make the body surface and the non-slip portions 20 and 20 come into contact with each other while suppressing the displacement of the sensor portion 4 without fail. In the present embodiment, since the non-slip portions 20, 20 are formed of an elastic member, the non-slip portions 20, 20 are deformed according to the surface shape of the subject's wrist 2 and securely and elastically contact. The sensor unit 4 while reducing the feeling of pressure on the wrist 2 of the subject.
Displacement is reliably prevented. The sensor unit 4 is not shifted by the wearer's operation or the like, and the ultrasonic wave is transmitted and received at a predetermined position, so that a pulse wave of the blood flow of the radial artery can be accurately obtained.

Note that the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope described in each claim. For example, in the above-described embodiment, one anti-slip portion 20 is provided on each side of the sensor portion 4 in the length direction of the belt 50 (the direction around the wrist). It can also be arranged. FIG. 7 shows such an example. In the example shown in FIG. 7, two anti-slip portions 20, 20, 20, 20 each having the same shape as the above-described embodiment are provided on both sides of the sensor unit 4 in the length direction of the belt 50 (the direction around the wrist). They are arranged side by side. Thus, the non-slip portion 2
A plurality of 0, 20, 20, and 20 are provided on both sides of the sensor unit 4 respectively (a plurality of protrusions of the anti-slip portion are formed, and a plurality of high-friction members serving as anti-slip portions are provided on both sides of the sensor unit 4). By disposing a plurality of contact portions between the non-slip portion and the body surface on both sides of the sensor portion 4, for example, by disposing them on the sensor portion 4), the effect of preventing displacement can be further improved.

When the sensor units 4 are disposed at a plurality of positions on the belt 50, a slip-preventing unit can be provided for each of the sensor units 4. As such an example, a wearable measuring device (pulse wave detecting device) as shown in FIG. 8 is shown. In the pulse wave detecting device shown in FIG. 8, the sensor units 4 and 4 are provided at two positions in the length direction of the belt 50. And
Non-slip portions 20, 20, 20 are arranged between the sensor portions 4, 4 and outside of the sensor portions 4, 4 in the longitudinal direction of the belt. As a result, for each of the sensor sections 4 and 4, the anti-slip sections 20 and
20 are formed. As described above, when the sensor units are disposed at a plurality of locations of the belt 50, by providing a non-slip portion for each sensor unit, even if any of the sensor units is used for measurement, It is possible to keep the detection sensitivity of the sensor unit good.

In the above-described embodiment and each of the modifications, the non-slip portions 20 are lengthwise non-slip portions extending in the length direction of the belt 50. It may be a non-slip portion, and may include both a widthwise non-slip portion extending in the width direction of the belt 50 and a lengthwise non-slip portion extending in the length direction of the belt 50. Such examples are shown in FIGS. FIG.
In the modified example shown in FIG. 5, width-direction non-slip portions 22 and 22 extending in the width direction of the belt 50 are provided in addition to the length-direction non-slip portions 20 and 20 similar to the above-described embodiment. The width direction non-slip portions 22 and 22 are the length direction non-slip portions 2.
Similarly to the reference numerals 0 and 20, the sensor unit 4 is disposed at two positions with the sensor unit 4 interposed therebetween, and is disposed on both sides of the sensor unit 4 in the width direction of the belt 50. The width direction non-slip portions 22, 2
2 is tapered from the surface side of the belt 50 to the wearer side, and the tip end (free end) on the wearer side is rounded in the same manner as the lengthwise non-slip portions 20 and 20. The columnar members similar to the lengthwise non-slip portions 20 and 20 are formed of an elastic material such as rubber, and the columnar members are fixed to the belt 50. By arranging the width direction non-slip portions 22, 22, when the belt 50 is worn in the width direction (axial direction of the mounting portion, around the arm such as around the wrist 2, the arm length). Direction), the displacement of the sensor unit 4 is effectively prevented against the force in the displacement direction.

In the modification shown in FIG. 10, two non-slip portions 20 and 20 provided on both sides of the sensor portion 4 in the longitudinal direction of the belt 50 are respectively formed in a substantially L-shape. Belt 50 in width direction and non-slip portion extending in width direction
And a lengthwise non-slip portion extending in the lengthwise direction. These non-slip portions 20, 20 are arranged and fixed symmetrically to each other with respect to the sensor portion 4.
In the modification shown in FIG. 11, the non-slip portion 20 has a rectangular frame shape, and the sensor portion 4 is disposed inside the non-slip portion 20 so that the non-slip portion 20 surrounds the sensor portion 4. It has become. And two sets of the part which forms the mutually opposing sides of a square are a width direction non-slip part and a length direction non-slip part, respectively. In the modification shown in FIG. 12, two non-slip portions 20, 20 disposed on both sides of the sensor unit 4 in the length direction of the belt 50 are formed in a substantially X-shape, and the right-angled prism unit is formed by an axis. Is arranged so as to be in the width direction of the belt 50 and functions as a widthwise non-slip portion extending in the width direction of the belt 50. Two other short right-angled prisms extending perpendicularly to the right-angled prism from the middle of the right-angled prism are , Belt 5
It functions as a lengthwise non-slip portion extending in the length direction of the zero.

In the above-described embodiment and each of the modifications, the non-slip portion is a widthwise non-slip portion extending in the width direction of the belt 50 or a lengthwise non-slip portion extending in the length direction of the belt 50. However, the anti-slip portion is not necessarily a belt 50
It is not necessary to extend in the width direction or the length direction, and it is not necessary to have a shape extending in one or more directions. For example,
As shown in FIG. 13, short columnar non-slip portions 20, 20, 2 erected with their axes perpendicular to the belt surface.
It may be 0, 20. Further, as shown in FIG. 14, a tape made of a non-slip material such as silicone rubber may be fixed to almost the entire inner peripheral surface of the belt by fixing or the like to form the non-slip portions 70, 70. Further, when the width direction non-slip portion, the length direction non-slip portion, and the like are provided at a plurality of positions with the sensor portion 4 interposed therebetween, it is not necessary that they have the same shape. For example, in the case of the pulse wave detection device worn around the wrist 2, the belt is more likely to float on the inner side of the wrist (palm side) than on the side of the wrist, so that the belt contacts the inner side of the wrist as shown in FIG. As a non-slip portion or a protruding portion, the non-slip portion that comes into contact with the wrist side may have a plate shape or a band shape thinner than the non-slip portion inside the wrist.

Further, in the above-described embodiment and each modified example, various modifications can be made to the structure, shape, material, etc. of the portion other than the non-slip portion. For example, as shown in FIG. 16, a non-slip portion 70 may be provided on the surface of the processing unit 3 on the body surface side to make the structure more difficult to rotate around the wrist. Further, as shown in FIG. 17, a sensor fixing portion 45 made of a material such as an acrylic resin harder than the belt may be connected in the middle of the belt 50. The sensor fixing portion 45 can be provided with the sensor portion 4 and the non-slip portions 20, 20. In the example of FIG. 17, openings 20 are provided at both ends of the sensor fixing portion, and the sensor fixing portion 45 of the belt 50 is provided.
A loop is formed by a planar fastener or the like at a connecting portion between the belt 50 and the sensor fixing portion 45 to engage the end of the belt 50 around the opening 20 of the sensor fixing portion 45.
In addition, as shown in FIG. 18, the fixing portion 45 may have a shape in which the belt fixing portion 45 is concavely curved toward the body surface.

In the above embodiment and each of the modifications,
Although the wearable measurement device is a pulse wave detection device, the wearable measurement device to which the present invention is applied is not limited to the pulse wave detection device, and the state of the body or the body surface of the subject from the body surface of the subject , A support unit for fixedly supporting the sensor unit with respect to the subject, and fixedly disposed on the support unit so as to be able to contact the body surface of the subject around the sensor unit. It is sufficient that the device has a non-slip portion that resists displacement in the shear direction with the body surface.For example, by detecting a phase difference between a transmission wave and a reception wave, subcutaneous fat or visceral fat is detected. And the like, a body fat measuring device for measuring the thickness of a fat layer in a human body, a blood vessel measuring device for measuring the shape and elastic modulus of a blood vessel, an image diagnostic device for obtaining an image of the inside of a body by ultrasonic waves, and the like. In this case, the holding structure of the processing unit 3 and the sensor unit 4 can be appropriately changed. Further, as the sensor in the sensor unit 4, a photoelectric sensor, a pressure sensor, or the like can be used. Each of the above-described modifications can be adopted as appropriate.

[0030]

As described above, according to the wearable measuring instrument according to the present invention, the wearer can wear it repeatedly by an easy operation without giving any discomfort to the wearer, and the sensor section can be accurately mounted on the body surface. Can be held.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a pulse wave detection device as one embodiment of a wearable measuring device of the present invention is worn on a subject.

FIG. 2 is a side view of the pulse wave detection device shown in FIG.

FIG. 3 is an exploded perspective view illustrating a schematic configuration of a sensor unit.

FIG. 4 is an enlarged perspective view of a main part showing a sensor part and its vicinity.

FIG. 5 is a block diagram showing a configuration of the pulse wave detection device of FIG.

FIG. 6 is an enlarged view of a main part in a state where the pulse wave detection device 1 of FIG. 1 is mounted, as viewed from the base of the arm of the subject to the hand.

7 is a perspective view of a main part showing another example of the wearable measuring instrument of the present invention, and is a view corresponding to FIG. 4 of the embodiment of FIG. 1;

8 is a perspective view of a main part showing another example of the wearable measuring device of the present invention, and is a diagram corresponding to FIG. 4 of the embodiment of FIG. 1;

9 is a perspective view of a main part showing another example of the wearable measuring instrument of the present invention, and is a view corresponding to FIG. 4 of the embodiment of FIG. 1;

10 is a main part perspective view showing another example of the wearable measuring instrument of the present invention, and is a view corresponding to FIG. 4 of the embodiment of FIG. 1;

11 is a perspective view of a main part showing another example of the wearable measuring instrument of the present invention, and is a view corresponding to FIG. 4 of the embodiment of FIG. 1;

12 is a perspective view of a main part showing another example of the wearable measuring instrument of the present invention, and is a view corresponding to FIG. 4 of the embodiment of FIG. 1;

13 is a perspective view of a main part showing another example of the wearable measuring device of the present invention, and is a diagram corresponding to FIG. 4 of the embodiment of FIG. 1;

14 is a main part side view showing another example of the wearable measuring instrument of the present invention, and is a view corresponding to FIG. 2 of the embodiment of FIG. 1;

FIG. 15 is a side view of a main part showing another example of the wearable measuring device of the present invention, and is a view corresponding to FIG. 2 of the embodiment of FIG. 1;

16 is a main part side view showing another example of the wearable measuring device of the present invention, and is a diagram corresponding to FIG. 2 of the embodiment of FIG. 1;

17A and 17B are diagrams showing another example of the wearable measuring device of the present invention, wherein FIG. 17A is a plan view of a main part, and FIG. 17B is a side view of a main part.

FIG. 18 is a side view of a main part showing another example of the wearable measuring instrument of the present invention, and is a view corresponding to FIG. 18 (b).

19A and 19B are diagrams showing a conventional wearable measuring device, wherein FIG. 19A is a side view showing the wearable measuring device attached to a wrist, and FIG. 19B is a perspective view showing the adhesive sheet of FIG. FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wearable measuring device (pulse wave detection device) 20 Non-slip part 22 Non-slip part 3 Processing part 31 Arithmetic processing part 32 Drive circuit 33 Display part 4 Sensor part 41 Piezoelectric element for transmission 42 Piezoelectric element for reception 44 Lower substrate 45 Sensor fixing part (supporting member) 46 Upper substrate 50 Belt (supporting member) 70 Non-slip part

Continued on the front page (72) Inventor Hiroyuki Odagiri 1-8-8 Nakase, Mihama-ku, Chiba-shi, Chiba F-term in Seiko Instruments Inc. 4C017 AA02 AA09 AA11 AB02 AC23 BC14 BC16 CC01 4C301 AA03 DD01 DD02 DD10 DD22 DD30 EE11 EE13 GA01 GB22 GB25 JC16 KK31 KK34

Claims (5)

[Claims] A sensor for detecting a state of the body or the body surface of the subject from a body surface of the subject; a support unit for fixing and supporting the sensor unit to the subject; and a sensor unit for the support unit. And a non-slip portion which is fixedly disposed around the body surface of the subject so as to be in contact with the body surface of the subject and resists displacement in a shear direction with the body surface. 2. The support means includes a belt wound around and fixed around the body surface of the subject, wherein the non-slip portion is a width-direction non-slip portion extending in a width direction of the belt, and The wearable measuring instrument according to claim 1, further comprising at least one of a lengthwise non-slip portion extending in a length direction. 3. The at least one of the width direction non-slip portion and the length direction non-slip portion is disposed at two or more positions in a belt length direction with the sensor interposed therebetween. The wearable measuring device according to claim 2, wherein: 4. The device according to claim 1, wherein the non-slip portion is a protrusion protruding from the support means toward the body surface. Wearable measuring equipment. 5. The non-slip portion is a high-friction layer disposed on the body surface side of the support means and having higher friction with the body surface than the sensor portion and the support means. The wearable measuring device according to any one of claims 1 to 3, characterized in that: