JP2018093891A - Biological information acquisition device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the measurement accuracy deterioration of a sensor due to the sweat of a user.SOLUTION: A biological information acquisition device comprises: a body part having a sensor on a first face; and a band part holding said body part and mounting said body part while a second face different from said first face is facing the body of a user. Said body part includes a recess part formed in said first face, and a groove part connected to said recess part and extending to said second face.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a biological information acquisition apparatus.

  In recent years, for example, wearable terminals that are worn on a user's arm or the like to acquire biometric information are becoming popular. Since the wearable terminal is used while being worn on the user's body, for example, it is possible to count the user's pulse rate and monitor the state of the user's body. As a pulse sensor that detects a user's pulse, there is one that measures the amount of reflected light.

  Such a wearable terminal can be used for heat stroke prevention, for example. That is, for example, a wearable terminal equipped with a temperature / humidity sensor that measures ambient temperature and humidity, a pulse sensor, and the like acquires the temperature and humidity and the user's pulse, and estimates the risk of heat stroke from these information Can do. The temperature / humidity sensor measures the ambient temperature and humidity, and the wearable terminal is mounted on the surface opposite to the user's body while being worn on the user's body, while the pulse sensor is mounted on the user's body side. It is generally mounted on the surface. And the housing | casing which mounts these temperature / humidity sensors, a pulse sensor, etc. is mounted | worn with a user's body by a rubber band, for example.

  FIG. 6 is a schematic cross-sectional view illustrating a specific example of the configuration of a wearable terminal including a temperature / humidity sensor and a pulse sensor. As shown in FIG. 6, the wearable terminal is configured by holding a housing 20 inside a rubber band 10. A temperature / humidity sensor 21 is provided on one surface of the housing 20, and a pulse sensor 22 is provided on the other surface of the housing 20. In the temperature / humidity sensor 21, an opening 11 is formed in the rubber band 10. For this reason, the temperature / humidity sensor 21 can measure the ambient temperature and humidity even when the wearable terminal is mounted on the user's body. Moreover, the pulse sensor 22 mounted on the surface opposite to the temperature / humidity sensor 21 can accurately detect the user's pulse by facing the user's body.

Japanese Patent Laid-Open No. 2006-96955

  However, when the wearable terminal is worn on the user's body, there is a problem that the measurement accuracy of the temperature / humidity sensor decreases due to the user's perspiration. That is, for example, in the wearable terminal having the configuration shown in FIG. 6, the vapor generated by the user's perspiration passes between the rubber band 10 and the housing 20 and condenses near the opening 11. As a result, measurement of ambient temperature and humidity by the temperature / humidity sensor 21 is hindered. If the ambient temperature and humidity are not accurately measured, it is difficult to prevent heat stroke using a wearable terminal.

  The disclosed technique has been made in view of such a point, and an object thereof is to provide a biological information acquisition apparatus capable of suppressing a decrease in measurement accuracy of a sensor due to user perspiration.

  In one aspect, the biometric information acquisition device disclosed in the present application is, in one aspect, a main body provided with a sensor on a first surface and a second surface different from the first surface that holds the main body. A band portion for mounting the main body portion toward the head, and the main body portion includes a recess formed in the first surface and a groove portion connected to the recess and extending to the second surface. .

  According to one aspect of the biological information acquisition device disclosed in the present application, it is possible to suppress a decrease in measurement accuracy of the sensor due to user perspiration.

FIG. 1 is a perspective view illustrating an appearance of a biological information acquisition apparatus according to an embodiment. FIG. 2 is another perspective view showing the appearance of the biological information acquiring apparatus according to the embodiment. FIG. 3 is an assembly diagram illustrating a configuration of the biological information acquisition apparatus. FIG. 4 is a perspective view showing the external appearance of the main body of the biological information acquisition apparatus. FIG. 5 is a schematic diagram showing a cross section taken along line AA of FIG. FIG. 6 is a schematic cross-sectional view showing a specific example of the biological information acquisition apparatus.

  Hereinafter, an embodiment of a biological information acquisition device disclosed in the present application will be described in detail with reference to the drawings. In addition, this invention is not limited by this embodiment.

  1 and 2 are perspective views showing an external appearance of a biological information acquisition apparatus according to an embodiment. FIG. 1 shows the external appearance of the side exposed to the outside when worn on the user's body, and FIG. 2 shows the external appearance of the side facing the user's body when worn on the user's body.

  As shown in FIGS. 1 and 2, the biological information acquisition device has a configuration in which a main body 200 is held by a rubber band 100. A plurality of belt holes 102 are formed in the belt portion 101 of the rubber band 100, and when the user wears the biometric information acquisition device around the arm, the belt portion 101 is wrapped around the arm, The protrusion 103 is engaged with the belt hole 102. Then, the leading end portion of the belt portion 101 is inserted into the idler 104.

  The main body holding part 105 has a shape of a container that is open on one side, and holds the main body part 200 inside. Opening portions 106 and 107 are formed in the main body holding portion 105. The opening 106 is formed at a position corresponding to a temperature / humidity sensor described later, and the opening 107 is formed at a position corresponding to a water detection sensor described later. The main body unit 200 is held by the main body holding unit 105, and the pulse sensor 201 is mounted on a surface facing the user's body (hereinafter referred to as "lower surface"). The pulse sensor 201 irradiates the user's body with light of a predetermined wavelength while the biological information acquisition device is mounted on the user's body, and measures the reflection amount of light from the user's blood, thereby Is detected. The main body 200 is held in a state where the lower surface on which the pulse sensor 201 is mounted is exposed by being fitted into the container-shaped main body holding portion 105.

  FIG. 3 is an assembly diagram illustrating a configuration of the biological information acquisition apparatus. As shown in FIG. 3, the main body part 200 is fitted into the main body holding part 105 of the rubber band 100. A temperature / humidity sensor 202 and a water detection sensor 203 are mounted on the surface of the main body 200 on the rubber band 100 side (hereinafter referred to as “upper surface”). An opening 106 of the rubber band 100 is formed at a position corresponding to the temperature / humidity sensor 202, and an opening 107 of the rubber band 100 is formed at a position corresponding to the water detection sensor 203. The water detection sensor 203 is disposed at the center of a recess formed on the upper surface of the main body 200, and a groove 204 extending to the lower surface of the main body 200 is connected to the recess.

  The opening 106 at a position corresponding to the temperature / humidity sensor 202 has an area larger than the size of the temperature / humidity sensor 202, and the entire temperature / humidity sensor 202 fits in the opening 106. For this reason, the air permeability around the temperature / humidity sensor 202 is improved, and a decrease in measurement accuracy of the temperature and humidity by the temperature / humidity sensor 202 can be suppressed. On the other hand, the opening 107 at a position corresponding to the water detection sensor 203 is a net-like opening having a plurality of small-diameter openings.

  The temperature / humidity sensor 202 measures the temperature and humidity near the opening 106. The water detection sensor 203 measures the amount of perspiration of the user by measuring the amount of water stored in the recess using, for example, infrared rays. The groove 204 guides vapor generated by perspiration from the lower surface of the main body 200 facing the user's body to a recess formed on the upper surface of the main body 200. Thus, since the groove | channel 204 induces the vapor | steam by a user's perspiration, a vapor | steam does not propagate through parts other than the groove | channel 204, and parts other than the recessed part of the upper surface of the main-body part 200 do not condense. As a result, the surroundings of the temperature / humidity sensor 202 are not condensed, and the temperature / humidity sensor 202 can accurately measure the ambient temperature and humidity.

  FIG. 4 is a perspective view showing an appearance of the main body 200. As shown in FIG. 4, a temperature / humidity sensor 202 and a water detection sensor 203 are provided on the upper surface of the main body 200. A recess 205 that is recessed from the upper surface of the main body 200 is formed around the water detection sensor 203. In other words, the water detection sensor 203 is provided in the center of the mortar-shaped recess 205. Therefore, the water detection sensor 203 can measure the amount of water stored in the recess 205.

  Three grooves 204 are connected to the recess 205. The groove 204 extends from the recess 205 through the upper surface and side surfaces of the main body 200 to the lower surface. For this reason, when the main body part 200 is held by the main body holding part 105 of the rubber band 100, the groove 204 forms a tube that opens on the lower surface of the main body part 200. Then, in a state where the biometric information acquisition device is mounted on the user's body, steam generated by the user's perspiration enters the groove 204 and is guided to the recess 205 to cause condensation. Therefore, when the water detection sensor 203 measures the amount of water stored in the recess 205, the user's sweating amount can be measured. The measurement result of the sweating amount can be used, for example, to estimate the risk of heat stroke of the user.

  The temperature / humidity sensor 202 is disposed relatively close to the water detection sensor 203, the groove 204, and the recess 205 on the upper surface of the main body 200. Due to this positional relationship, in the vicinity of the temperature / humidity sensor 202 in a state where the biological information acquisition device is mounted on the user's body, most of the vapor generated by the user's perspiration is guided by the groove 204. For this reason, the vapor | steam which goes to the temperature / humidity sensor 202 can be decreased, the dew condensation in the periphery of the temperature / humidity sensor 202 can be suppressed, and the fall of the measurement accuracy of the temperature and humidity by the temperature / humidity sensor 202 can be suppressed. . As a result, the heat stress applied to the user can be accurately measured, and for example, the risk of heat stroke can be accurately estimated.

  FIG. 5 is a schematic diagram showing a cross section taken along line AA of FIG. As shown in FIG. 5, the main body 200 is held by the main body holder 105 of the rubber band 100, and the temperature / humidity sensor 202 and the water detection sensor 203 are mounted on the upper surface of the main body 200, while Is equipped with a pulse sensor 201. An opening 106 is formed in the rubber band 100 at a position corresponding to the temperature / humidity sensor 202, and an opening 107 is formed in the rubber band 100 at a position corresponding to the water detection sensor 203. A recess 205 is formed above the water detection sensor 203, and a window member 203a formed of a transparent material such as glass is fitted into the bottom of the recess 205. The water detection sensor 203 measures the amount of water stored in the recess 205 by irradiating the recess 205 with infrared light through the window member 203a and measuring the amount of reflected infrared light.

  A groove 204 is connected to the concave portion 205, and the groove 204 is surrounded by the main body holding portion 105 of the rubber band 100, thereby forming a tube having an opening 204 a on the lower surface of the main body portion 200 and extending to the concave portion 205. Yes. In addition, in the vicinity of the opening 204a, the main body holding unit 105 protrudes toward the user's body side with respect to the main body unit 200 to form a raised portion 105a. With this shape, when the biometric information acquisition device is mounted on the user's body, the vapor generated by the user's perspiration is collected in the space surrounded by the raised portion 105a and enters from the opening 204a. Then, the vapor passes through the groove 204 and is condensed in the recess 205. The amount of moisture stored in the recess 205 due to condensation is measured by the water detection sensor 203, whereby the perspiration amount of the user is measured.

  At this time, since the main body portion 200 and the main body holding portion 105 of the rubber band 100 are in close contact with each other at the portion other than the groove 204, steam generated by user perspiration does not enter between the main body portion 200 and the rubber band 100, There is no condensation around the temperature and humidity sensor 202. Furthermore, since the opening 106 at a position corresponding to the temperature / humidity sensor 202 has a relatively large diameter, the air permeability around the temperature / humidity sensor 202 is good, and condensation around the temperature / humidity sensor 202 is more reliably prevented. can do. As a result, it is possible to suppress a decrease in temperature and humidity measurement accuracy by the temperature / humidity sensor 202.

  The measurement results obtained by the pulse sensor 201, the temperature / humidity sensor 202, and the water detection sensor 203 are collected by a terminal device such as a smartphone possessed by the user, for example, and the heat stroke based on the user's pulse, temperature, humidity, and the amount of sweating of the user Used for risk estimation. In this embodiment, since the groove 204 and the recess 205 suppress the decrease in measurement accuracy of the temperature / humidity sensor 202 and the amount of user perspiration measured by the water detection sensor 203 is used, the risk of heat stroke is accurately reduced. Can be estimated.

  As described above, according to the present embodiment, in the biological information acquisition device having a structure in which the main body is held by the rubber band, the concave portion recessed from the upper surface is formed on the upper surface of the main body on which the temperature / humidity sensor is mounted, A groove extending from the recess to the lower surface of the main body is provided. For this reason, in a state where the biological information acquisition device is mounted on the user's body, steam generated by the user's perspiration is guided to the recess by the groove, and the surroundings of the temperature / humidity sensor located in a portion other than the recess are condensed by the steam. There is nothing. As a result, even if the user sweats with the biometric information acquisition device mounted on the user's body, it is possible to suppress a decrease in measurement accuracy of temperature and humidity by the temperature and humidity sensor.

  In the above-described embodiment, the temperature / humidity sensor 202 is mounted on the upper surface of the main body 200. However, other sensors may be mounted on the upper surface. Even in this case, since the vapor | steam generate | occur | produced by a user's perspiration by the groove | channel 204 and the recessed part 205 is induced, the influence of the vapor | steam with respect to a sensor can be reduced.

  Further, the shapes of the grooves 204 and the recesses 205 are not limited to those illustrated. That is, a recess may be formed on the upper surface of the main body 200 so as to surround the temperature / humidity sensor 202, and a groove extending from the recess to the lower surface of the main body 200 may be formed. Since the temperature / humidity sensor 202 is surrounded by the concave portion, it is possible to prevent the vapor transmitted toward the temperature / humidity sensor 202 from condensing in the concave portion and the vapor from reaching the temperature / humidity sensor 202.

  Furthermore, in the above-described embodiment, the main body 200 is held by the rubber band 100. However, the main body 200 does not necessarily have to be held by the rubber rubber band 100. Even when the main body 200 is held by a band of another material, the groove 204 and the recess 205 can reduce the influence of steam on the sensor on the upper surface of the main body 200.

DESCRIPTION OF SYMBOLS 100 Rubber band 101 Belt part 102 Belt hole 103 Protrusion 104 Free ring 105 Main body holding part 105a Raised part 106, 107 Opening part 200 Main body part 201 Pulse sensor 202 Temperature / humidity sensor 203 Water detection sensor 203a Window member 204 Groove 204a Opening part 205 Concave part

Claims (4)

A main body having a sensor on the first surface;
A band part for holding the main body part and attaching the main body part with a second surface different from the first surface facing a user's body;
The main body is
A recess formed in the first surface;
A biological information acquisition device comprising: a groove portion connected to the concave portion and extending to the second surface. The band part is
The biological information acquiring apparatus according to claim 1, further comprising an opening at a position corresponding to the sensor. The main body is
The biological information acquisition apparatus according to claim 1, further comprising a water detection sensor that measures the amount of water stored in the recess. The band part is
The biological information acquisition apparatus according to claim 3, further comprising an opening at a position corresponding to the water detection sensor.

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