JP2013123455A - Biological information measuring panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a biological information measuring panel capable of preventing breakage of a sensor for outputting a signal to be used for measuring biological information of a subject even if great downward loads are applied to a pressure receiving plate disposed on the lower side of the subject.SOLUTION: The panel 1A includes the pressure receiving plate 2 and a base plate 3. The pressure receiving plate 2 is supported in a state separate from the base plate 3. A cantilevered flat spring 4 which can be elastically bent/deformed downward is formed at the center of the base plate 3 by providing a groove hole 5 penetrating in the direction of thickness of the base plate 2 in such a way as to enclose the periphery of the flat spring 4 except for a fixed end 4a side of the flat spring 4. A presser member 9 for bending/deforming the flat spring 4 by pressing the flat spring 4 downward with the downward vibration of the pressure receiving plate 2 is disposed between the pressure receiving plate 2 and the flat spring 4. Variation of the amount of bending deformation of the flat spring 4 is detected by a detection sensor 10. An output signal from the detection sensor 10 is used for measuring the biological information of the subject.

Description

  The present invention relates to a biological information measurement panel, a biological information measuring device, and a biological information measuring method used when measuring biological information of a subject.

  In medical facilities (eg, hospitals), elderly facilities, general households, etc., in order to grasp the health status of subjects such as sick people, elderly people, infants, and healthy people, biological information (eg: respiratory information, (Heartbeat information, body movement information) is measured.

  As an apparatus used for this measurement, several apparatuses including a panel arranged on the lower side of a subject are known (see, for example, Patent Documents 1 to 5). Among these devices, the configuration of the panel used in the device disclosed in Japanese Patent Laid-Open No. 2009-226192 (Patent Document 5) will be briefly described as follows.

  That is, the panel includes a pressure-sensitive plate that is horizontally disposed below the subject, and a substrate that is disposed on the lower side of the pressure-sensitive plate so as to be opposed to the pressure-sensitive plate. The pressure sensitive plate vibrates by the breathing motion of the subject (human body). On the lower surface side of the pressure sensitive plate, a transmission promoting member is provided so as to protrude downward in contact with the lower surface of the pressure sensitive plate. A piezoelectric element (sensor) is disposed between the lower end of the transmission promoting member and the substrate. The piezoelectric element is sandwiched between the transmission facilitating member and the substrate, and senses the vibration of the transmission facilitating member transmitted from the pressure-sensitive plate, and generates a voltage as a signal used for measuring the respiration information of the subject. Output.

JP 2005-253957 A JP 2006-43445 A JP 2008-67979 A JP 2008-99747 A JP 2009-226192 A

  Thus, in the panel having the above configuration, when a large downward load is applied to the pressure sensitive plate, the piezoelectric element (sensor) sandwiched between the transmission promoting member and the substrate may be damaged.

  The present invention has been made in view of the above-described technical background, and the purpose of the present invention is that even when a large downward load is applied to a plate disposed substantially horizontally below the subject, An object of the present invention is to provide a biological information measuring panel that can prevent damage to a sensor that outputs a signal used for measurement, a biological information measuring device including the panel, and a biological information measuring device using the panel.

  The present invention provides the following means.

[1] a pressure receiving plate disposed substantially horizontally below the subject;
A substrate disposed on the lower side of the pressure receiving plate so as to face the pressure receiving plate;
The pressure receiving plate is disposed between the substrate and the pressure receiving plate, and the pressure receiving plate is separated from the substrate, and at least a central portion of the pressure receiving plate can be vibrated in the vertical direction with the biological activity of the subject. A support member for supporting the pressure receiving plate;
A detection sensor;
In the central part of the substrate, a cantilevered leaf spring part that can be bent and deformed elastically downward is provided with a slot so as to surround the periphery of the leaf spring part excluding the fixed end side of the leaf spring part. It is formed by being provided through in the thickness direction of the substrate,
Between the pressure receiving plate and the leaf spring portion, a pressing member that receives a vibration operation in the downward direction of the pressure receiving plate and presses the leaf spring portion downward to bend and deform is disposed,
The biological information measurement panel, wherein the detection sensor detects a change in the amount of bending deformation of the leaf spring portion and outputs a signal used for measuring biological information of a subject.

  [2] The biological information measuring panel as recited in the aforementioned Item 1, wherein the pressing member is elastically compressible in a direction in which the leaf spring portion is pressed.

  [3] The biological information measuring panel as recited in the aforementioned Item 1 or 2, wherein the pressing member has a hollow portion therein.

  [4] The biological information measurement panel according to any one of items 1 to 3, wherein the support member is elastically compressible in a direction in which the pressure receiving plate is supported.

  [5] The biological information measuring panel according to any one of items 1 to 4, wherein the pressure receiving plate is elastically bendable.

  [6] The biological information measurement panel according to any one of [1] to [5], wherein a space for enabling downward bending deformation of the leaf spring portion is formed below the leaf spring portion. .

  [7] The biological information measuring panel as recited in the aforementioned Item 6, wherein the space portion is formed by providing a spacer protruding downward at a position outside the leaf spring portion on the lower surface of the substrate.

  [8] In the space portion, the thickness of the leaf spring portion is larger than the thickness of the substrate so that the height position of the lower surface of the leaf spring portion is located above the height position of the lower surface of the substrate. The biological information measurement panel according to item 6, which is formed by being thinly formed.

[9] The substrate and the pressure receiving plate are arranged below the head of the subject,
The biological information measurement panel according to any one of the preceding items 1 to 8, wherein an edge on the subject shoulder side of the substrate and the pressure receiving plate is formed in a substantially convex arc shape in plan view.

[10] The biological information measurement panel according to any one of 1 to 9 above,
A biological information measuring device, comprising: a calculating means for calculating biological information of a subject based on a signal output from a detection sensor of the panel.

  [11] A biological information measuring method, comprising: measuring biological information of a subject using a signal output from the detection sensor of the biological information measuring panel according to any one of 1 to 9 above.

  The present invention has the following effects.

  In the biological information measuring panel of [1], a cantilevered plate spring portion that can be elastically bent and deformed downward is formed at the center of the substrate, and between the pressure receiving plate and the plate spring portion. In addition, a pressing member that receives a downward vibration operation of the pressure receiving plate and presses the leaf spring portion downward to bend and deform is disposed, and a detection sensor that outputs a signal used for measuring the biological information of the subject is provided. Since the variation of the bending deformation amount of the leaf spring portion is detected, even when a large downward load is applied to the pressure receiving plate, the load is not applied to the detection sensor. Thereby, damage to the detection sensor can be prevented.

  Further, the leaf spring portion is formed in the center portion of the substrate by providing a groove hole penetrating in the thickness direction of the substrate so as to surround the periphery of the leaf spring portion excluding the fixed end portion side of the leaf spring portion. Therefore, it is possible to easily form a leaf spring portion having desired bending elastic characteristics.

  In the panel of [2], since the pressing member is elastically compressible in the direction of pressing the leaf spring portion, the amount of bending deformation of the leaf spring portion is set by appropriately setting the hardness of the pressing member. From these fluctuations, it is possible to extract only the low frequency components resulting from the respiratory rate and the like by removing the high frequency components caused by snoring and heartbeat as the subject's biological activity.

  In the panel of [3], since the pressing member has a hollow portion therein, the pressing member is easily buckled. Therefore, when the downward vibration operation of the pressure receiving plate is large, the pressing member can be elastically buckled and deformed to press the plate spring portion downward with an appropriate pressing force. It is possible to prevent plastic bending deformation of the leaf spring portion due to an excessive downward pressing force applied to the portion.

  In the panel of [4], since the support member is elastically compressible in the direction of supporting the receiving member, the pressure receiving plate can surely vibrate in the vertical direction with the biological activity of the subject. Thereby, the bending deformation amount of a leaf | plate spring part can be fluctuate | varied reliably.

  In the panel of [5], since the pressure receiving plate can be elastically bent and deformed, the pressure receiving plate can surely vibrate in the vertical direction with the biological activity of the subject. The amount of bending deformation of the part can be reliably varied.

  In the panel of [6], a space for enabling downward bending deformation of the leaf spring portion is formed below the leaf spring portion. Deformation can occur.

  In the panel of [7], the space can be reliably and easily formed.

  In the panel of [8], the space can be reliably and easily formed, and further, the increase in the thickness of the panel due to the provision of the spacer on the lower surface of the substrate can be prevented.

  In the panel of [9], the test subject shoulder side edges of the substrate and the pressure receiving plate are each formed in a substantially convex arc shape, so that when the test subject turns over to the left or right side, the subject's face or shoulder It is possible to prevent the portion from hitting the left end portion or the left end portion of the edge on the subject shoulder side of the substrate and the pressure receiving plate. Thereby, a test subject's sleeping comfort can be improved.

  [10] The biological information measuring panel has the same effects as the panel described in any one of [1] to [9].

  [11] The biological information measuring method has the same effect as the effect of the panel described in any one of [1] to [9].

FIG. 1 is a plan view showing a biological information measuring panel and a biological information measuring device according to a first embodiment of the present invention in a usage state. FIG. 2 is a side view showing the panel in its use state. FIG. 3 is a plan view of the panel. FIG. 4 is a front view of the panel. FIG. 5 is a sectional view taken along line XX in FIG. 6 is a cross-sectional view taken along line YY in FIG. FIG. 7 is a plan view of the substrate of the panel. FIG. 8 is a bottom view of the substrate of the panel. FIG. 9 is an enlarged cross-sectional view showing the leaf spring portion of the substrate of the panel and the vicinity thereof. FIG. 10 is an enlarged cross-sectional view showing the leaf spring portion of the substrate of the panel and the vicinity thereof in a state where the leaf spring portion is bent and deformed. FIG. 11 is a block diagram showing the configuration of the measurement apparatus. FIG. 12A is a perspective view of a pressing member of the panel. FIG. 12B is a perspective view of a first modification of the pressing member of the panel. FIG. 12C is a perspective view of a second modification of the pressing member of the panel. FIG. 12D is a perspective view of a third modification of the pressing member of the panel. FIG. 13A is a plan view of a leaf spring portion and a slot of the substrate of the panel. FIG. 13B is a plan view of a first modification of the leaf spring portion and the groove of the substrate of the panel. FIG. 13C is a plan view of a second modification of the leaf spring portion and the slot of the substrate of the panel. FIG. 13D is a plan view of a third modification of the leaf spring portion and the groove of the substrate of the panel. FIG. 13B is a plan view of a fourth modification of the leaf spring portion and the groove of the substrate of the panel. FIG. 14 is an enlarged cross-sectional view corresponding to FIG. 10, showing a fifth modification of the leaf spring portion of the substrate of the panel. FIG. 15: is a top view which shows the panel for biological information measurement and biological information measuring device which concern on 2nd Embodiment of this invention in the use condition.

  Next, several embodiments of the present invention will be described below with reference to the drawings.

  FIGS. 1-11 is a figure explaining the panel for biological information measurement which concerns on 1st Embodiment of this invention. 1 and 2, reference numeral 40 denotes a bed such as a bed. The upper surface of the bed 40, that is, the bed surface 40 a is formed of an upper surface of an elastic mat such as a mattress or a mattress.

  As shown in FIGS. 1 and 2, the panel 1 </ b> A according to the first embodiment includes respiratory information (e.g., respiratory rate information, sputum information), heartbeat information, body motion, It is used for the biological information measuring device 30 that measures information (eg, turning information) and the like.

  As shown in FIGS. 1 and 3 to 8, the panel 1 </ b> A includes a pressure receiving plate 2, a substrate 3, a plurality of support members 7, a pressing member 9, a detection sensor 10, a cable conversion box 15, and the like. Note that the cable conversion box 15 is not shown in FIGS.

  As shown in FIGS. 1 and 2, the pressure receiving plate 2 is used as a test site Ha of the subject H, for example, arranged substantially horizontally below the chest or abdomen, and the weight of the test site Ha of the subject H Is received as a downward load. As shown in FIG. 3, the shape of the pressure receiving plate 2 is a substantially rectangular shape in plan view, and more specifically, a substantially rectangular shape extending in the left-right direction longer than the width dimension of the test site Ha of the subject H in plan view. (See FIG. 1). The length in the longitudinal direction, the length in the lateral direction, and the thickness of the pressure receiving plate 2 are not limited and can be variously set. For example, the length in the longitudinal direction of the pressure receiving plate 2 is set in a range of 300 to 1200 mm, the length in the short direction of the pressure receiving plate 2 is set in a range of 50 to 500 mm, and the thickness of the pressure receiving plate 2 is It is set within a range of 0.5 to 3 mm.

  Furthermore, in the first embodiment, the pressure receiving plate 2 is made of a resin such as ABS resin or acrylic resin, and the pressure receiving plate 2 can be elastically bent and deformed.

  As shown in FIGS. 4 to 6, the substrate 3 is disposed below the pressure receiving plate 2 so as to be opposed to the pressure receiving plate 2. As shown in FIG. 7, the shape of the substrate 3 is substantially the same as the shape of the pressure receiving plate 2 in plan view. The thickness of the substrate 3 is not limited and can be set in various ways, but it is particularly preferable that the thickness is set within a range of 0.5 to 5 mm. The gap S between the substrate 3 and the pressure receiving plate 2 (see FIG. 4) is not limited and can be set in various ways, but it is particularly desirable to set it within a range of 2 to 6 mm.

  Further, in the first embodiment, the substrate 3 is made of a metal such as aluminum (including alloys thereof; the same shall apply hereinafter) or stainless steel, and the substrate 3 is particularly incapable of bending deformation. desirable.

  As shown in FIG. 7, a cantilevered leaf spring portion 4 is provided at the center of the substrate 3 except for the fixed end portion 4 a (that is, the base end portion of the leaf spring portion 4) side of the leaf spring portion 4. A slot 5 having a substantially U-shape in plan view is formed by penetrating in the thickness direction of the substrate 3 so as to surround the periphery of the portion 4. By forming the leaf spring portion 4 at the center of the substrate 3 in this way, the leaf spring portion 4 can be elastically bent and deformed downward about the fixed end portion 4a (see FIG. 9 and 10). The length and width of the leaf spring portion 4 are not limited, and can be variously set so that the leaf spring portion 4 has a desired bending elastic characteristic. For example, the length of the leaf spring portion 4 is set within a range of 5 to 50 mm, and the width of the leaf spring portion 4 is set within a range of 5 to 50 mm.

  Also, as shown in FIGS. 4 to 6, 8, and 9, a spacer 14 having a substantially rectangular frame shape as viewed from the bottom extends around the leaf spring portion 4 at a position near the outside of the leaf spring portion 4 on the lower surface 3 b of the substrate 3. It is provided integrally so as to project downward in a surrounding manner. The spacer 14 is for forming a space portion 13 for enabling downward bending deformation of the leaf spring portion 4 on the lower side of the leaf spring portion 4, and an inner region of the spacer 14 is a space portion. 13 is supported. That is, the space portion 13 is formed by the spacer 14 below the leaf spring portion 4. The spacer 14 is made of rubber such as synthetic rubber or natural rubber, and is fixed to a position in the vicinity of the outside of the leaf spring portion 4 on the lower surface 3b of the substrate 3 by a predetermined fixing means (for example, an adhesive). The thickness of the spacer 14 is such that the free end portion 4b of the leaf spring portion 4 abuts on the bed surface 40a (see FIG. 2) when the leaf spring portion 4 is bent and deformed in the downward direction. The thickness is not particularly limited as long as it is set to a thickness that does not hinder the bending deformation of the material. For example, the thickness of the spacer 14 is set to 0.5 to 3 mm.

  As shown in FIGS. 3 to 7, the plurality of support members 7 are disposed between the vicinity of the outer peripheral edge portion of the upper surface 3 a of the substrate 3 and the vicinity of the outer peripheral edge portion of the lower surface 2 b of the pressure receiving plate 2. Is supported from the lower side of the pressure receiving plate 2 in a state of being separated from the substrate 3. The support member 7 is formed in a columnar shape, and more specifically in a cylindrical shape. The lower end surfaces of these support members 7 are fixed to each other in the vicinity of the outer peripheral edge portion of the upper surface 3 a of the substrate 3, and the upper end surfaces of these support members 7 are outer peripheral edge portions of the lower surface 2 b of the pressure receiving plate 2. In the vicinity, they are fixed apart from each other. Specifically, in the first embodiment, the number of the support members 7 is four, and the lower end surface of each support member 7 is in the vicinity of each corner of the upper surface 3a of the substrate 3 with predetermined fixing means (eg, welding, welding). , Screws and adhesives), and the upper end surface of each support member 7 is in the vicinity of each corner of the lower surface 2b of the pressure receiving plate 2 with predetermined fixing means (eg, welding, welding, screwing, adhesive) It is fixed by. Thus, the pressure receiving plate 2 is supported from the lower side of the pressure receiving plate 2 by these supporting members 7 in the vicinity of the outer peripheral edge portion of the lower surface 2b. Furthermore, the pressure receiving plate 2 is supported by these supporting members 7 so that at least the central portion 2c thereof can vibrate in the vertical direction with the biological activity of the subject H.

  Further, in the first embodiment, the support member 7 is made of a metal such as aluminum, so that the support member 7 is substantially incompressible in the direction in which the pressure receiving plate 2 is supported (that is, the axial direction of the support member 7). That is, it is made of a rigid column.

  As shown in FIGS. 9 and 10, the pressing member 9 is subjected to a downward vibration operation of the pressure receiving plate 2 and presses only the leaf spring portion 4 of the substrate 3 downward to bend and deform. As shown in -6, it arrange | positions between the pressure receiving plate 2 and the leaf | plate spring part 4 of the board | substrate 3. As shown in FIG. More specifically, the pressing member 9 has a lower end portion 9a (that is, a tip end portion) whose sectional area is much smaller than the areas of the upper surface 2a and the lower surface 2b of the pressure receiving plate 2. Further, the pressing member 9 is integrally provided so as to protrude downward at the center of the lower surface 2 b of the pressure receiving plate 2. The lower end portion 9a of the pressing member 9 is disposed in contact with or close to the upper surface of the leaf spring portion 4, and more specifically, in contact with or close to the upper surface of the leaf spring portion 4 on the free end portion 4b side. It is arranged at the position. In the first embodiment, the shape of the pressing member 9 is a columnar shape, and the upper end surface of the pressing member 9 is fixed to a central portion of the lower surface 2b of the pressure receiving plate 2 (for example, welding, welding, screwing, adhesive) ) And are integrated.

  Furthermore, in the first embodiment, the pressing member 9 is made of a rubber such as synthetic rubber (eg, urethane rubber, silicone rubber, fluoro rubber) or natural rubber, whereby the pressing member 9 presses the leaf spring portion 4. That is, it can be elastically compressed in the axial direction (that is, the axial direction of the pressing member 9).

  The detection sensor 10 detects a variation in the amount of bending deformation of the leaf spring portion 4 of the substrate 3 and outputs a signal corresponding to the variation in the amount of bending deformation. The signal output from the detection sensor 10 is used for measuring the biological information of the subject H. In the first embodiment, the detection sensor 10 is composed of a piezoelectric element or a strain gauge, and the detection sensor 10 is fixed to the upper surface of the leaf spring portion 4 on the fixed end portion 4a side as shown in FIGS. Attached (attached in detail). The piezoelectric element is also called a piezo element. The detection sensor 10 detects the variation in the amount of bending distortion generated in the leaf spring portion 4 (specifically, the fixed end portion 4a of the leaf spring portion 4) due to the variation in the amount of bending deformation of the leaf spring portion 4. And a voltage fluctuation signal corresponding to the fluctuation of the bending strain amount of the leaf spring portion 4 is output from the detection sensor 10. The voltage fluctuation signal output in this way is used for measuring the biological information of the subject H.

  The cable conversion box 15 converts the signal line 11 extending from the detection sensor 10 into a signal cable 27 extending from the calculation means 20 described later. As shown in FIG. It is attached to the fixed state protruding. The signal line 11 extending from the detection sensor 10 is converted into a signal cable 27 extending from the calculation means 20 via the cable conversion box 15.

  The biological information measuring device 30 according to the first embodiment includes the panel 1A, the calculating means 20, and the like of the first embodiment.

  As shown in FIG. 11, the calculation means 20 calculates biological information of the subject H based on the signal output from the detection sensor 10 of the panel 1 </ b> A, and includes an amplification unit 21, a filter unit 22, and A / D conversion. Unit 23, central processing unit 24, communication unit 25, display unit 26, and the like. The central processing unit 24 is composed of a computer having a ROM, a RAM, a CPU, and the like. The display unit 26 includes a liquid crystal display or the like.

  In this calculating means 20, after the signal output from the detection sensor 10 (more specifically, the voltage fluctuation signal) is amplified by the amplifier 21, a predetermined signal (eg, noise signal) is amplified from the amplified signal. The analog signal is converted into a digital signal by the A / D converter 23. Based on the digital signal, the central processing unit 24 calculates the biological information of the subject H according to a predetermined program. This calculation is performed by a known method, for example, by frequency analysis by the FTT method. The biological information of the subject H calculated by the central processing unit 24 is displayed on the display unit 26, and a predetermined device (not shown) is connected by the communication unit 25 via a communication network such as a LAN line, a telephone line, and an Internet line. Sent).

  Further, the calculating means 20 is a storage unit (not shown) having an SD card or the like for storing the biological information of the subject H calculated by the central processing unit 24, supplies the operating power to the calculating means 20, and a detection sensor. 10 is operated by a measurer such as a power supply unit (not shown) that supplies the operation power to the battery 10 via the signal cable 27, a caregiver (eg, a nurse) who cares for the subject H (including assistance) An instruction unit (not shown) having an instruction button for sending a predetermined instruction to the means 20, a lamp (not shown) that lights up in a predetermined case, and the like are provided.

  Next, operations of the panel 1A and the measuring device 30 according to the first embodiment will be described below.

  As shown in FIGS. 1 and 2, the panel 1A is disposed substantially horizontally above the bed surface 40a and below the chest or abdomen as the test site Ha of the subject H. When the pressure receiving plate 2 of the panel 1A does not receive the weight of the test site Ha of the subject H, the pressing member 9 does not press the leaf spring portion 4 of the substrate 3 as shown in FIG. The portion 9a is disposed at a position in contact with or close to the upper surface of the leaf spring portion 4 on the free end portion 4b side. When the pressure receiving plate 2 receives the weight of the test site Ha of the subject H, the central portion 2c of the pressure receiving plate 2 is elastically slightly bent and deformed downward. By this downward bending deformation operation, the pressing member 9 presses the leaf spring portion 4 downward. Thereby, as shown in FIG. 10, the leaf | plate spring part 4 bends and deform | transforms a little downward elastically centering on the fixed end part 4a.

  Further, the pressure receiving plate 2 vibrates in the vertical direction at the center portion 2c in accordance with the biological activity (eg, breathing, heartbeat, body movement) of the subject H during sleeping, for example. In this case, when the central portion 2c of the pressure receiving plate 2 is oscillated downward, the pressing member 9 presses the leaf spring portion 4 downward by the downward oscillating operation. Accordingly, the leaf spring portion 4 is elastically bent and deformed downward about the fixed end portion 4a. When the pressure receiving plate 2 vibrates upward, the pressing member 9 moves upward together with the pressure receiving plate 2, and thereby the pressing force applied to the leaf spring portion 4 by the pressing member 9 is weakened. As a result, the amount of bending deformation of the leaf spring portion 4 is reduced. Therefore, as the pressure receiving plate 2 vibrates in the vertical direction, the amount of bending deformation of the leaf spring portion 4 varies.

  Such a variation in the amount of bending deformation of the leaf spring portion 4 is detected by the detection sensor 10 as a variation in the amount of bending strain generated in the leaf spring portion 4, and the voltage corresponding to the variation in the amount of bending strain is detected from the detection sensor 10. The fluctuation signal is output. Then, this signal is transmitted to the arithmetic means 20 via the signal line 11, the cable conversion box 15 and the signal cable 27. The calculating means 20 calculates the biological information of the subject H based on the signal thus transmitted.

  The panel 1A of this embodiment has the following advantages.

  At the center of the substrate 3, a cantilevered plate spring portion 4 that can be elastically bent and deformed downward is formed, and between the pressure receiving plate 2 and the plate spring portion 4, A pressing member 9 is disposed that receives a vibration operation in a direction and presses the leaf spring portion 4 downward to bend and deform, and a detection sensor 10 that outputs a signal used for measuring biological information of the subject H is a plate. Since a change in the amount of bending deformation of the spring portion 4 is detected, even when a large downward load is applied to the pressure receiving plate 2, the load is not directly applied to the detection sensor 10. Thereby, damage to detection sensor 10 can be prevented.

  Further, in the plate spring portion 4, a substantially U-shaped groove hole 5 in plan view penetrates in the thickness direction of the substrate 3 so as to surround the periphery of the plate spring portion 4 excluding the fixed end portion 4 a side of the plate spring portion 4. Thus, the leaf spring portion 4 having a desired bending elastic characteristic (eg, bending elastic modulus) can be easily formed since it is formed at the center portion of the substrate 3. Several modified examples of the shape of the leaf spring portion 4 will be described later.

  Furthermore, since the pressing member 9 can be elastically compressed in the direction in which the leaf spring portion 4 is pressed, the bending strain of the leaf spring portion 4 can be set by appropriately setting the hardness (compression elastic modulus) of the pressing member 9. From the fluctuation of the amount (fluctuation of the amount of bending deformation of the leaf spring portion 4), the high-frequency component caused by sputum or heartbeat is removed as the biological activity of the subject H, and only the low-frequency component caused by the respiratory rate is taken out. Can do. Here, the hardness of the pressing member 9 in the direction in which the pressing member 9 presses the leaf spring portion 4 (that is, the axial direction of the pressing member 9) is a duprometer (type according to JIS (Japanese Industrial Standard) K 6253-1997). It is particularly desirable that the hardness measured in A) is set within a range of 40 to 70. By setting the hardness of the pressing member 9 within this range, a high frequency component caused by wrinkles, heartbeats, etc. is removed from fluctuations in the amount of bending strain of the leaf spring portion 4 and a low frequency component caused by the respiratory rate (ie, Only frequency components of 1 Hz or less) can be reliably extracted. Therefore, by appropriately setting the hardness of the pressing member 9 as described above, it is possible to reliably calculate desired biological information such as the respiratory rate among the various biological information of the subject H by the calculating means 20.

  Furthermore, since the pressure receiving plate 2 can be elastically bent and deformed, at least the central portion 2c of the pressure receiving plate 2 can vibrate in the vertical direction with the biological activity of the subject H. The amount of bending deformation of the leaf spring portion 4 can be reliably varied.

  Furthermore, since the space part 13 for enabling downward bending deformation of the leaf spring part 4 is formed on the lower side of the leaf spring part 4, appropriate downward bending deformation of the leaf spring part 4 is formed. Can be generated.

  Furthermore, since the space portion 13 is formed by the spacer 14, the space portion 13 can be reliably and easily formed.

  In the panel 1A of the first embodiment, as described above, the pressure receiving plate 2 can be elastically bent and deformed, and the support member 7 is substantially incompressible in the direction in which the pressure receiving plate 2 is supported. It is a thing. However, in the panel according to the present invention, the pressure receiving plate 2 and the support member 7 are not limited to those having such characteristics, and can be variously changed.

  For example, in the panel according to the present invention, the pressure receiving plate 2 is not substantially bent and deformed (for example, a rigid plate), and the support member 7 can be elastically compressed in the direction in which the pressure receiving plate 2 is supported. It may be a thing. In this case, the pressure receiving plate 2 is made of metal such as aluminum or stainless steel, and the support member 7 is made of rubber, for example. The pressure receiving plate 2 is elastically supported from below the pressure receiving plate 2 by the support member 7. When the pressure receiving plate 2 receives the weight of the test site Ha of the subject H, the support member 7 is elastically slightly compressed and the entire pressure receiving plate 2 moves slightly downward. Then, the support member 7 elastically expands and contracts with the biological activity of the subject H, and accordingly, the entire pressure receiving plate 2 vibrates in the vertical direction. The hardness of the support member 7 in the direction in which the support member 7 supports the pressure receiving plate 2 (that is, the axial direction of the support member 7) is the hardness measured with a duprometer (type A) according to JIS K 6253-1997. It is particularly desirable to set within the range of 40-70. As described above, since the support member 7 is elastically compressible in the direction in which the pressure receiving plate 2 is supported, the pressure receiving plate 2 can surely vibrate in the vertical direction with the biological activity of the subject H. Thereby, the amount of bending deformation of the leaf spring portion 4 can be reliably varied.

  Furthermore, in the panel according to the present invention, the pressure receiving plate 2 can be elastically bent and deformed, and the support member 7 can be elastically compressed in the direction of supporting the pressure receiving plate 2. Also good. In this case, the pressure receiving plate 2 is elastically supported from the lower side of the pressure receiving plate 2 by the support member 7. When the pressure receiving plate 2 receives the weight of the test site of the subject H, the central portion 2c of the pressure receiving plate 2 is elastically slightly bent downward and the support member 7 is elastically slightly compressed to be compressed. Move slightly down. Then, along with the biological activity of the subject H, the central portion 2c of the pressure receiving plate 2 vibrates in the vertical direction and the entire pressure receiving plate 2 vibrates in the vertical direction. Therefore, the pressure receiving plate 2 vibrates in the vertical direction with these vibrations combined. The hardness of the support member 7 in the direction in which the support member 7 supports the pressure receiving plate 2 (that is, the axial direction of the support member 7) is the hardness measured with a duprometer (type A) according to JIS K 6253-1997. It is particularly desirable to set within the range of 40-70. Furthermore, the hardness of the support member 7 is preferably the same as the hardness of the pressing member 9 or harder than the hardness of the pressing member 9. Further, regarding the elastic bending deformation characteristics of the pressure receiving plate 2, when the pressure receiving plate 2 receives the weight of the test site Ha of the subject H, the downward bending deformation amount of the central portion 2c of the pressure receiving plate 2 is pressed. It is particularly desirable that the elastic bending deformation characteristic of the pressure receiving plate 2 is set so as to be smaller than the amount of compression of the member 9 in the axial direction.

  In the panel 1A of the first embodiment, the pressing member 9 has a columnar shape as described above. However, in the panel according to the present invention, the shape of the pressing member 9 is not limited to the cylindrical shape, and can be variously changed.

  FIG. 12A shows a columnar pressing member 9 employed in the panel 1A of the first embodiment. 12B to 12D each show a modification of the pressing member 9 of the panel 1A of the first embodiment.

  The shape of the pressing member 9 in FIG. 12B is a prismatic shape.

  The shape of the pressing member 9 in FIG. 12C is a cylindrical shape, that is, the pressing member 9 has a hollow portion 9c penetrating in the axial direction therein, whereby the pressing member 9 is easily buckled. . Therefore, according to the pressing member 9, when the downward vibration operation of the pressure receiving plate 2 is large, the pressing member 9 is elastically buckled and the plate spring portion 4 is moved downward with an appropriate pressing force. It can be pressed, and plastic bending deformation of the leaf spring portion 4 due to excessive downward pressing force applied to the leaf spring portion 4 can be prevented.

  The shape of the pressing member 9 in FIG. 12D is a columnar shape in which the lower end portion 9a is formed in a spherical shape.

  Furthermore, in the panel which concerns on this invention, the press member 9 is not limited to what was shown by these figures, It can change variously, for example, the press member 9 of FIG. 12B and FIG. It may have a hollow portion penetrating in the axial direction, and the pressing member 9 may have an inverted cone shape, an inverted pyramid shape, or the like.

  In the panel 1A of the first embodiment, the plate spring portion 4 of the substrate 3 is formed by the groove 5 having a substantially U-shape in plan view penetrating in the thickness direction of the substrate 3 as described above. , Formed at the center of the substrate 3. FIG. 13A shows the leaf spring portion 4 and the slot 5 employed in the panel 1A of the first embodiment. However, in the panel according to the present invention, the shape of the slot 5 forming the leaf spring portion 4 is not limited to a substantially U shape in plan view, and the leaf spring portion 4 has a desired bending elastic characteristic. It can be changed in various ways. In addition, for example, as shown in FIGS. 13B to 13E, the shape of the slot 5 may be substantially U-shaped in plan view, substantially Ω-shaped, or the like.

  In the panel 1 </ b> A of the first embodiment, the space portion 13 for allowing the leaf spring portion 4 to be bent downward is integrated with the spacer 14 protruding downward at a predetermined position on the lower surface 3 b of the substrate 3. It is formed by providing. However, in the panel according to the present invention, for example, as shown in FIG. 14, the space portion 13 has a height position of the lower surface 4 c of the leaf spring portion 4 with respect to a height position of the lower surface 3 b of the substrate 3. The leaf spring portion 4 may be formed so that the thickness thereof is thinner than the thickness of the substrate 3 so as to be positioned on the upper side. In this case, the space 13 can be reliably and easily formed, and further, an increase in the thickness of the panel 1A due to the spacer 14 provided on the lower surface 3b of the substrate 3 can be prevented.

  FIG. 15 is a diagram illustrating a biological information measurement panel and a measurement device according to the second embodiment of the present invention. In the figure, the same reference numerals are assigned to elements corresponding to the panel 1A and the measuring device 30 of the first embodiment.

  The panel 1B of the second embodiment is disposed substantially horizontally below the pillow 41 disposed above the bed surface 40a and below the head as the test site Ha of the subject H. . In this panel 1B, the test subject H shoulder side edge 3z of the substrate 3 and the test subject H side edge 2z of the pressure receiving plate 2 respectively project toward the subject H shoulder side in plan view over the entire length region. It is formed in a substantially convex arc shape. As a result, when the subject H turns over to the left or right, the face or shoulder of the subject H hits the left end or left end of the edges 3z, 2z on the subject H shoulder side of the substrate 3 and the pressure receiving plate 2. Can be prevented. Thereby, the sleeping comfort of the subject H can be improved.

  Other configurations of the panel 1B are the same as those of the panel 1B of the first embodiment.

  Although several embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications can be made.

  For example, in the panel 1A of the first embodiment, the detection sensor 10 is composed of a piezoelectric element or a strain gauge. However, in the panel according to the present invention, the detection sensor 10 is an acceleration sensor (eg, semiconductor type). An acceleration sensor), a distance sensor, or the like.

  INDUSTRIAL APPLICABILITY The present invention can be used for a biological information measurement panel, a biological information measuring device, and a biological information measuring method used when measuring biological information of a subject.

1A, 1B: Biological information measurement panel 2: Pressure receiving plate 3: Substrate 4: Plate spring portion 5: Groove hole 7: Support member 9: Press member 9c: Press member cavity 10: Detection sensor 13: Space portion 14: Spacer 20: Calculation means 30: Biological information measuring device H: Subject

Claims (11)

A pressure receiving plate disposed substantially horizontally below the subject;
A substrate disposed on the lower side of the pressure receiving plate so as to face the pressure receiving plate;
The pressure receiving plate is disposed between the substrate and the pressure receiving plate, and the pressure receiving plate is separated from the substrate, and at least a central portion of the pressure receiving plate can be vibrated in the vertical direction with the biological activity of the subject. A support member for supporting the pressure receiving plate;
A detection sensor;
In the central part of the substrate, a cantilevered leaf spring part that can be bent and deformed elastically downward is provided with a slot so as to surround the periphery of the leaf spring part excluding the fixed end side of the leaf spring part. It is formed by being provided through in the thickness direction of the substrate,
Between the pressure receiving plate and the leaf spring portion, a pressing member that receives a vibration operation in the downward direction of the pressure receiving plate and presses the leaf spring portion downward to bend and deform is disposed,
The biological information measurement panel, wherein the detection sensor detects a change in the amount of bending deformation of the leaf spring portion and outputs a signal used for measuring biological information of a subject.   The biological information measuring panel according to claim 1, wherein the pressing member is elastically compressible in a direction in which the leaf spring portion is pressed.   The biological information measurement panel according to claim 1, wherein the pressing member has a hollow portion therein.   The biological information measurement panel according to claim 1, wherein the support member is elastically compressible in a direction in which the pressure receiving plate is supported.   The biological information measuring panel according to claim 1, wherein the pressure receiving plate is elastically bendable.   The biological information measurement panel according to any one of claims 1 to 5, wherein a space portion for allowing downward bending deformation of the leaf spring portion is formed below the leaf spring portion.   The biological information measurement panel according to claim 6, wherein the space portion is formed by a spacer protruding downward from a position outside the leaf spring portion on the lower surface of the substrate.   The space portion is formed such that the thickness of the leaf spring portion is thinner than the thickness of the substrate so that the height position of the lower surface of the leaf spring portion is located above the height position of the lower surface of the substrate. The biological information measuring panel according to claim 6, wherein the biological information measuring panel is formed. The substrate and the pressure receiving plate are arranged below the head of the subject,
The biological information measurement panel according to any one of claims 1 to 8, wherein an edge on the subject shoulder side of the substrate and the pressure receiving plate is formed in a substantially convex arc shape in plan view. The biological information measurement panel according to any one of claims 1 to 9,
A biological information measuring device, comprising: a calculating means for calculating biological information of a subject based on a signal output from a detection sensor of the panel.   A biological information measuring method for measuring biological information of a subject using a signal output from the detection sensor of the biological information measuring panel according to claim 1.

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