JP2017189415A - Biological information measurement device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a biological information measurement device capable of measuring highly accurate biological information, since a positional relation between a subject and a detector can be appropriately and stably held.SOLUTION: A biological information measurement device comprises: a light emitting section 150 emitting light to a subject; a light receiving section 140 receiving the light passing through the subject; a translucent member 50 transmitting the light and being brought into contact with the subject; and a case section 30 having the translucent member 50 and being brought into contact with the subject. In a cross-sectional view in a direction perpendicular to a direction toward the translucent member 50 from the light emitting section 150, when a second surface 50b of the translucent member 50 facing a first surface 50a brought into contact with the subject of the translucent member 50 is defined as a reference, a distance from the second surface 50b to the first surface 50a is shorter than a distance from the second surface 50b to a surface (surface 30a having apexes of 52t1 and 52t2) brought into contact with the subject of the case section 30.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a biological information measuring device.

  2. Description of the Related Art Conventionally, a wristwatch type biological information measuring device is known which is attached to a part such as a wrist with a band or the like and has a function of measuring biological information such as a pulse wave of a wearer as a subject. For example, in Patent Document 1, a light emitting unit (light emitting element) that is attached to the wearer's arm (wrist) and emits light to the skin of the wearer as the subject, and light that has passed through the wearer's skin. There is disclosed an arm-mounted biological information measuring device that measures biological information such as a pulse wave of a wearer using an optical pulse wave detection sensor having a light receiving unit (light receiving element) that receives light.

  In such a biological information measurement apparatus, blood flow information on a skin surface of a wearer, which is a measurement target (subject), is optically measured and converted into a signal to obtain biological information such as a pulse wave, and light emission Appropriate and stable contact state between the skin contact surface and the surface of the skin of the detection unit (sensor unit) having the sensor unit and the light receiving unit, for example, the contact position and contact pressure (stress) between the skin surface and the detection unit This is a very important factor for obtaining accurate information.

JP 2000-254105 A

  However, in the biological information measuring device (pulse detection device) described in Patent Document 1, no mention is made of a configuration that appropriately and stably holds the contact state between the skin surface as the subject and the detection unit. It has not been. For this reason, for example, due to the body movement of the wearer, the contact state between the detection unit of the biological information measurement device and the skin surface of the wearer changes, and thereby the detection output by the sensor unit varies, and the biological information There is a problem in that there is a possibility that the detection accuracy may be reduced.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  Application Example 1 The biological information measurement apparatus according to this application example includes a light emitting unit that emits light to a subject, a light receiving unit that receives the light that passes through the subject, and transmits the light. A translucent member that contacts the subject, and a case portion that includes the translucent member and at least a part of which contacts the subject, and is orthogonal to a direction from the light emitting portion toward the translucent member. A distance from the second surface to the first surface when the second surface of the translucent member facing the first surface that contacts the subject of the translucent member in a cross-sectional view from the direction is used as a reference Is shorter than the distance from the second surface to the surface of the case portion that contacts the subject.

In the biological information measuring apparatus, in order to accurately receive light passing through the subject to be measured by the light receiving unit and obtain accurate information, the distance (interval) from the subject to the light receiving unit is important, In order to hold this distance (interval) at a predetermined value, a configuration that can hold the contact state between the detection unit and the subject appropriately and stably is required. According to this application example, the surface of the case portion that contacts the subject is closer to the subject than the first surface of the translucent member. As a result, in the mounted state of the biological information measuring apparatus in which the subject is brought into contact with the first surface of the translucent member, the surface of the case portion that contacts the subject is stronger than the first surface of the translucent member. The contact state between the detection unit and the subject can be stably maintained by contact.
Accordingly, since the positional relationship between the subject and the light receiving unit that allows the light receiving unit to accurately receive the light passing through the subject via the light transmitting member can be stably maintained, for example, a pulse wave or the like It is possible to provide a biological information measuring device that can accurately acquire the biological information.

  Application Example 2 In the biological information measurement device according to the application example, the case portion includes a protruding portion that protrudes in a direction from the light emitting portion toward the light transmissive member, and the light transmissive member includes: It is preferable that the protrusion is provided.

  According to this application example, the case portion has the protruding portion that protrudes toward the subject when the biological information measuring device is attached to the subject, and the light transmitting member is provided in the protruding portion. In addition, the protruding portion and the translucent member are more stably held with respect to the subject, and the measurement accuracy of the biological information measuring device can be further improved.

  Application Example 3 In the biological information measurement device according to the application example, the first part of the case portion that is located in the vicinity of the light-transmissive member and contacts the subject in the cross-sectional view, and the light-transmissive member The distance from the second surface to the first surface when L is L = 4.5 mm, where L is the distance from the second region located on the opposite side of the first region across The difference Δh between the distance from the second surface to the surface of the case portion that contacts the subject is preferably 0.05 mm ≦ Δh ≦ 0.3 mm.

  An object to be measured by the biological information measuring apparatus, for example, a blood vessel to be noted is about 0.3 mm below the skin. In order for the light receiving unit to accurately receive the reflected light from such an object, the first part and The larger the width dimension L with the second part, the more advantageous. However, increasing the width dimension L results in an increase in the area in the planar direction of the biological information measuring device. If the width dimension L exceeds 4.5 mm, the portability deteriorates, for example, an uncomfortable feeling is caused at the time of wearing. Resulting in. On the other hand, if the width dimension L is too small, it becomes difficult to accurately receive the reflected light from the object in the light receiving portion. If the width dimension L is not 0.3 mm or more, the reflected light from the blood vessel is received. The light cannot be received accurately at the part. From the above, in the present application example, 4.5 mm set as the reference value of the width dimension L is equal to that of the biological information measuring device even when an impact due to intense exercise or the like is applied to the biological information measuring device attached to the object. It is the width near the upper limit where movement is difficult to occur, and it can be said that it is the upper limit of the width dimension L that can perform accurate measurement of biological information and can further improve portability. According to this application example, when the width dimension L is 4.5 mm, the distance from the second surface to the first surface of the translucent member, and the distance from the second surface to the surface in contact with the subject of the case portion, By setting the difference Δh to 0.05 mm ≦ Δh ≦ 0.3 mm, it is possible to provide a biological information measuring device capable of acquiring accurate biological information without impairing portability in daily life The inventor found out that

  Application Example 4 In the biological information measurement device according to the application example, in the cross-sectional view, the first part of the case portion that is located in the vicinity of the light transmitting member and contacts the subject, and the light transmitting member When the distance from the second part located on the opposite side of the first part is L, L is 4.0 mm ≦ L ≦ 5.0 mm. The difference Δh between the distance to the surface and the distance from the second surface to the surface in contact with the subject of the case portion is 0.15 mm ≦ Δh ≦ 0.17 mm.

  Even if the width dimension L exceeds 4.5 mm, the inventor feels uncomfortable at the time of wearing because the area in the plane direction of the biological information measuring device becomes large if the width dimension L is 5.0 mm or less. It was confirmed that there would be no deterioration in portability such as In addition, when the width dimension L is in the range of 4.0 mm ≦ L ≦ 5.0 mm, the inventor sets portability in daily life by setting Δh described above to 0.15 mm ≦ Δh ≦ 0.17 mm. It has been found that a biological information measuring device capable of acquiring more accurate biological information can be provided without impairing the above.

  Application Example 5 In the biological information measurement device according to the application example, in the cross-sectional view, the first portion of the case portion that is located in the vicinity of the light transmitting member and contacts the subject, and the light transmitting member When the distance from the second part located on the opposite side of the first part across L is L, the distance from the second surface to the first surface, and from the second surface to the case part The difference Δh from the distance to the surface in contact with the subject is preferably represented by the formula (1).

  According to this application example, by setting Δh described above in the range represented by the above formula (1), the contact state between the detection unit and the subject can be appropriately and stably maintained, For example, the inventor has found that biological information such as a pulse wave can be accurately acquired.

  Application Example 6 In the biological information measurement device according to the application example, a light shielding unit that is disposed between the light emitting unit and the light receiving unit and shields the light that is directly incident on the light receiving unit from the light emitting unit. It is characterized by providing.

  According to this application example, the light emitted from the light emitting unit can be prevented from directly reaching (entering) the light receiving unit by the light shielding unit disposed between the light receiving unit and the light emitting unit. Thereby, light with less noise component can be incident on the light receiving unit, and the measurement accuracy of the biological information measuring device can be further improved.

  Application Example 7 In the biological information measurement device according to the application example, the light shielding part is provided in the case part.

  According to this application example, by configuring the detection unit (sensor unit) having the light emitting unit and the light receiving unit as a general-purpose detection module (sensor module), the general-purpose module is configured as a case unit provided with a light-shielding unit. Incorporation into a living body information measuring device with high measurement accuracy is possible.

  Application Example 8 In the biological information measurement device according to the application example, the biological information measurement apparatus includes a second light emitting unit that emits light to the subject, and the light emitting unit and the second light emitting unit each emit light at each position. The distance from the translucent member and the distance from the light receiving portion are arranged at different positions.

  According to this application example, since the light emitting unit and the second light emitting unit are arranged at positions different from the light emitting unit, for example, the light emitting unit and the second light emitting unit are provided. By placing it at a line-symmetrical position with respect to the imaginary line passing through the center of the light receiving part, the light combining the two light emitting parts gathers in the light receiving part in a space-saving manner, enabling more accurate detection become.

  Application Example 9 In the biological information measurement device according to the application example described above, the wavelength bands of light emitted from the light emitting unit and the second light emitting unit are different from each other.

  According to this application example, for example, the light in the first wavelength range that is easily reflected by the first substance in the blood vessel of the subject, and the second that is easily reflected by the second substance different from the first substance. By assigning light in the wavelength band to each of the light emitting unit and the second light emitting unit, it is possible to provide a biological information measuring device capable of obtaining detection values corresponding to a plurality of substances.

  Application Example 10 In the biological information measurement device according to the application example, the case unit has a light shielding property.

  According to this application example, since the case portion has a light shielding property, noise light emitted from the light emitting portion and different from the light to be detected via the subject reaches the light receiving portion (is incident). Can be prevented. Thereby, light with less noise component can be incident on the light receiving unit, and the measurement accuracy of the biological information measuring device can be further improved.

The perspective view which shows the external appearance of the biological information measuring device which concerns on embodiment. A perspective view showing appearance of a living body information measuring device of an embodiment. The side view which shows the external appearance of the biological information measuring device of embodiment. Explanatory drawing about mounting | wearing with a biometric information measurement apparatus, and communication with a terminal device. The functional block diagram of a biological information measuring device. The front sectional view which shows typically the example of a structure of the sensor part of a biological information measuring device. The top view which shows typically the structural example of a sensor part seeing from AA of FIG. The fragmentary sectional view which shows typically the contact state of the sensor part and the user's skin as a subject. The width dimension L, which is the distance between the first part and the second part of the case part that is located in the vicinity of the translucent member and contacts the user, the distance from the second surface to the first surface of the translucent member, and the first Tables 1 to 5 showing the evaluation results of the relationship with the difference Δh from the distance from the two surfaces to the surface in contact with the user of the case part. The front sectional view which shows typically the sensor part which concerns on the modification 1 of a biological information measuring device. The front sectional view which shows typically the sensor part which concerns on the modification 2 of a biological information measuring device. The fragmentary sectional view which shows typically the sensor part which concerns on the modification 3 of a biological information measuring device. The perspective view which shows typically the sensor part which concerns on the modification 4 of a biological information measuring device. The front view which shows typically the sensor part which concerns on the modification 5 of a biological information measuring device. The fragmentary sectional view which shows typically the sensor part which concerns on the modification 6 of a biological information measuring device. The top view which shows typically the sensor part which concerns on the modification 7 of a biological information measuring device. The fragmentary sectional view which shows typically the sensor part which concerns on the modification 8 of a biological information measuring device. The fragmentary sectional view which shows typically the sensor part which concerns on the modification 9 of a biological information measuring device.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that this embodiment described below does not unduly limit the contents of the present invention described in the claims, and all the configurations described in the present embodiment are essential constituent requirements of the present invention. Not necessarily. In each of the following drawings, the scale of each layer and each member is made different from the actual scale so that each layer and each member can be recognized.

(Embodiment)
1. FIG. 1 is a perspective view showing an external appearance of a biological information measuring device according to an embodiment as viewed from the front direction, and FIG. 2 is a perspective view seen from an obliquely upward direction side in FIG. . FIG. 3 is a side view illustrating an appearance of the biological information measuring apparatus according to the embodiment.

As shown in FIGS. 1 to 3, the biological information measuring device of the present embodiment includes a band unit 10, a case unit 30, and a sensor unit 40 as a biological information measuring module.
The case part 30 is attached to the band part 10. The sensor unit 40 is provided in the case unit 30. Further, the biological information measuring apparatus has a processing unit 200 as shown in FIG. The processing unit 200 is provided in the case unit 30 and detects biological information based on a detection signal from the sensor unit 40. In addition, the biological information measuring device of this embodiment is not limited to the configuration of FIG. 1, FIG. 2, and FIG. 3, and some of the components are omitted, replaced with other components, or other configurations. Various modifications such as adding elements are possible.

  As will be described later with reference to FIG. 6, the sensor unit 40 as the biological information measuring module includes a substrate 160, a light emitting unit 150, a light receiving unit 140, and a first wall as a frame-shaped light shielding unit including a wall unit 70. It is comprised from the part 71, the 2nd wall part 72, the optical detection unit which has the aperture | diaphragm | squeeze part 80 (80a, 80b), and another member. In the example of FIG. 6, the other members are a convex portion 52, a concave portion 56, and the like as a protruding portion realized by the case portion 30 having the translucent member 50. However, the light detection unit according to the present embodiment includes these members, that is, the sensor unit 40 as a whole can correspond to the light detection unit.

  Returning to FIG. 1, FIG. 2, and FIG. The band unit 10 is for wrapping around the wrist of a wearer (hereinafter, also referred to as a user) as a subject and mounting the biological information measuring device (case unit 30). The band part 10 has a band hole 12 and a buckle part 14. The buckle portion 14 has a band insertion portion 15 and a projection portion 16. The user inserts one end side of the band unit 10 into the band insertion unit 15 of the buckle unit 14 and inserts the protrusion 16 of the buckle unit 14 into the band hole 12 of the band unit 10, so that the biological information measuring device is attached to the wrist. Attach to. In this case, depending on which band hole 12 the protrusion 16 is inserted into, the magnitude of the pressing (pressing on the wrist surface) of the sensor unit 40 described later can be adjusted.

  The case part 30 corresponds to a main body part of the biological information measuring device. Various components of the biological information measuring device such as the sensor unit 40 and the processing unit 200 (see FIG. 5) are provided inside the case unit 30. That is, the case part 30 is a housing for housing these components. The case portion 30 includes, for example, a top case 34 located on the opposite side of the wrist and a bottom case 36 located on the wrist side. The case portion 30 may not be separated from the top case 34 and the bottom case 36. Moreover, you may employ | adopt the band which used the beautiful tablet instead of the buckle part 14. FIG.

  The case portion 30 of the present embodiment is provided with a light emitting window portion 32. The light emitting window 32 is formed of a light transmissive member. The case unit 30 is provided with a light emitting unit (LED, a light emitting unit for notification different from the light emitting unit 150 of the light detection unit) mounted on the flexible substrate, and light from the light emitting unit is transmitted to the light emitting window. It is injected to the outside of the case part 30 through the part 32.

  As shown in FIG. 3, the case portion 30 is provided with a terminal portion 35. When the biological information measuring device is attached to a cradle (not shown), the terminal part of the cradle and the terminal part 35 of the case part 30 are electrically connected. Thereby, the secondary battery (battery) provided in the case part 30 can be charged.

  The sensor unit 40 as a biological information measurement module detects biological information such as a pulse wave of a subject. For example, the sensor unit 40 includes a light receiving unit 140 and a light emitting unit 150, as shown in FIGS. In addition, the sensor unit 40 is formed by a case unit 30 (bottom case 36) having a translucent member 50 that is brought into contact with a subject, and is a protrusion as a projecting unit that projects along the direction from the light emitting unit 150 toward the translucent member 50. Part 52. That is, the convex portion 52 functions as a protruding portion that comes into contact with the skin surface of the subject and applies pressure in a state where the sensor portion 40 is attached to the subject. The light emitting unit 150 emits light in a state where the convex portion 52 presses the skin surface in this way, and the light receiving unit 140 receives the light reflected by the subject (blood vessel). Is output to the processing unit 200 as a detection signal. The processing unit 200 detects biological information such as a pulse wave based on the detection signal from the sensor unit 40. Note that the biological information to be detected by the biological information measuring device of the present embodiment is not limited to the pulse wave (pulse rate), and the biological information measuring device can detect biological information other than the pulse wave (for example, oxygen saturation in blood). Device for detecting temperature, body temperature, heart rate, etc.).

  FIG. 4 is an explanatory diagram showing an outline of the wearing of the biological information measuring device 400 and the communication with the terminal device 420. As shown in FIG. 4, the user who is the subject wears the biological information measuring device 400 on the wrist 410 like a watch. As shown in FIG. 3, a sensor unit 40 is provided on the subject side surface of the case unit 30. Therefore, when the biological information measuring device 400 is attached, the convex portion 52 of the sensor unit 40 comes into contact with the skin surface of the wrist 410 to apply pressure, and in this state, the light emitting unit 150 of the sensor unit 40 emits light, When the light receiving unit 140 receives the reflected light, biological information such as a pulse wave is detected.

  The biological information measuring device 400 and the terminal device 420 are communicatively connected to exchange data. The terminal device 420 is a portable communication terminal such as a smartphone, a mobile phone, or a feature phone. Alternatively, the terminal device 420 may be an information processing terminal such as a tablet computer. As a communication connection between the biological information measuring device 400 and the terminal device 420, for example, proximity wireless communication such as Bluetooth can be employed. In this way, the biological information measuring device 400 and the terminal device 420 are communicatively connected, so that various information such as the pulse rate and calorie consumption can be displayed on the display unit 430 (LCD or the like) of the terminal device 420. That is, various information obtained based on the detection signal of the sensor unit 40 can be displayed. Note that the calculation processing of information such as the pulse rate and calorie consumption may be executed by the biological information measuring device 400, or at least a part thereof may be executed by the terminal device 420.

  The biological information measuring device 400 is provided with a light emitting window 32, and notifies various kinds of information to the user by light emission (lighting and blinking) of a light emitting body for notification (not shown). For example, in the information such as calorie consumption, when entering the fat burning zone or exiting the fat burning zone, this is notified by light emission of the illuminant through the light emitting window 32. Further, when a mail or the like is received at the terminal device 420, it is notified from the terminal device 420 to the biological information measuring device 400. Then, when the light emitter of the biological information measuring device 400 emits light, the user is notified of reception of e-mail or the like.

  As described above, in the example illustrated in FIG. 4, the biological information measuring device 400 is not provided with a display unit such as an LCD, and information that needs to be notified by characters, numbers, or the like is displayed on the display unit 430 of the terminal device 420. Is displayed. As described above, in the example shown in FIG. 4, the vital information measuring device 400 can be downsized by notifying the user of the minimum necessary information by the light emission of the light emitter without providing a display unit such as an LCD. Yes. In addition, since the display unit is not provided in the biological information measuring apparatus 400, the beauty of the biological information measuring apparatus 400 can be improved.

  FIG. 5 shows a functional block diagram of the biological information measuring apparatus of the present embodiment. 5 includes a sensor unit 40, a body motion sensor unit 170, a vibration generation unit 180, a processing unit 200, a storage unit 240, a communication unit 250, an antenna 252, and a notification unit 260 as a biological information measurement module. Including. Note that the biological information measuring device of the present embodiment is not limited to the configuration shown in FIG. 5, and some of the components are omitted, replaced with other components, or other components are added. Various modifications are possible.

  The sensor unit 40 as a biological information measurement module detects biological information such as a pulse wave, and includes a light receiving unit 140 and a light emitting unit 150. A pulse wave sensor (photoelectric sensor) is realized by the light receiving unit 140, the light emitting unit 150, and the like. The sensor unit 40 outputs a signal detected by the pulse wave sensor as a pulse wave detection signal.

  The body motion sensor unit 170 outputs a body motion detection signal that is a signal that changes according to body motion, based on sensor information of various sensors. The body motion sensor unit 170 includes, for example, an acceleration sensor 172 as a body motion sensor. The body motion sensor unit 170 may include a pressure sensor, a gyro sensor, or the like as the body motion sensor.

  The processing unit 200 performs various signal processing and control processing using the storage unit 240 as a work area, for example, and can be realized by a processor such as a CPU or a logic circuit such as an ASIC. The processing unit 200 includes a signal processing unit 210, a pulsation information calculation unit 220, and a notification control unit 230.

  The signal processing unit 210 performs various types of signal processing (filter processing and the like), and performs signal processing on, for example, a pulse wave detection signal from the sensor unit 40, a body motion detection signal from the body motion sensor unit 170, and the like. I do. For example, the signal processing unit 210 includes a body movement noise reduction unit 212. Based on the body motion detection signal from the body motion sensor unit 170, the body motion noise reduction unit 212 performs a process of reducing (removing) body motion noise that is noise caused by body motion from the pulse wave detection signal. Specifically, for example, noise reduction processing using an adaptive filter or the like is performed.

  The pulsation information calculation unit 220 performs pulsation information calculation processing based on the signal from the signal processing unit 210 and the like. The pulsation information is information such as the pulse rate. Specifically, the pulsation information calculation unit 220 obtains a spectrum by performing frequency analysis processing such as FFT on the pulse wave detection signal after the noise reduction processing in the body motion noise reduction unit 212, and obtains the spectrum. In FIG. 5, processing is performed in which a representative frequency is a heartbeat frequency. A value obtained by multiplying the obtained frequency by 60 is a commonly used pulse rate (heart rate). Note that the pulsation information is not limited to the pulse rate itself, and may be other various information (for example, the frequency or cycle of the heartbeat) representing the pulse rate, for example. Moreover, the information which represents the state of pulsation may be sufficient, for example, it is good also considering the value showing the blood volume itself as pulsation information.

  The notification control unit 230 controls the notification unit 260. The notification unit 260 (notification device) notifies the user of various types of information under the control of the notification control unit 230. As the notification unit 260, for example, a notification light emitter can be used. In this case, the notification control unit 230 controls lighting, blinking, and the like of the light emitter by controlling the current flowing through the LED. The notification unit 260 may be a display unit such as an LCD, a buzzer, or the like.

  The notification control unit 230 controls the vibration generation unit 180. The vibration generator 180 notifies the user of various types of information by vibration. The vibration generator 180 can be realized by, for example, a vibration motor (vibrator). For example, the vibration motor generates vibration by rotating an eccentric weight. Specifically, eccentric weights are attached to both ends of the drive shaft (rotor shaft) so that the motor itself swings. The vibration of the vibration generator 180 is controlled by the notification controller 230. The vibration generator 180 is not limited to such a vibration motor, and various modifications can be made. For example, the vibration generating unit 180 may be realized by a piezo element or the like.

  Due to the vibration generated by the vibration generating unit 180, for example, a start-up notification when the power is turned on, a notification that the initial pulse wave detection has been successful, a warning when a pulse wave cannot be detected continues for a certain period of time, Notification, warning at the time of battery voltage drop, notification of wake-up alarm, notification of e-mail, phone call, etc. from a terminal device such as a smartphone can be performed. These pieces of information may be notified by a notification light emitting unit, or may be notified by both the vibration generating unit 180 and the light emitting unit.

  The communication unit 250 performs communication processing with the external terminal device 420 as described with reference to FIG. For example, wireless communication processing is performed according to a standard such as Bluetooth (registered trademark). Specifically, the communication unit 250 performs a signal reception process from the antenna 252 and a signal transmission process to the antenna 252. The function of the communication unit 250 can be realized by a logic circuit such as a communication processor or ASIC.

(Example of sensor configuration)
Next, a detailed configuration example of the sensor unit 40 will be described with reference to FIGS. 6, 7, and 8. FIG. 6 is a front sectional view schematically showing a configuration example of the sensor unit of the biological information measuring apparatus, and FIG. 7 is a plan view schematically showing AA in FIG. FIG. 8 is a partial cross-sectional view schematically showing a contact state between the sensor unit 40 and a user's skin 411 as a subject.
As shown in FIGS. 6 and 7, the sensor unit 40 of this configuration example includes a light receiving unit 140 and a light emitting unit 150. The light receiving unit 140 and the light emitting unit 150 are arranged with a predetermined interval, and are mounted on a support surface (mounting surface) 160a of a substrate 160 (sensor substrate) as a support unit. The light emitting unit 150 emits light to an object (such as a subject). The light receiving unit 140 receives light (reflected light, transmitted light, etc.) that has passed through the object. For example, when the light emitting unit 150 emits light and the light is reflected by an object (for example, a blood vessel), the light receiving unit 140 receives and detects the reflected light. The light receiving unit 140 can be realized by a light receiving element such as a photodiode. The light emitting unit 150 can be realized by a light emitting element such as an LED. For example, the light receiving unit 140 can be realized by a PN junction diode element or the like formed on a semiconductor substrate. In this case, an angle limiting filter for narrowing the light receiving angle and a wavelength limiting filter (optical filter film) for limiting the wavelength of light incident on the light receiving element may be formed on the diode element.

  A dome-shaped lens 151 (condensing lens in a broad sense) provided as a condensing unit provided in the light emitting unit 150 is an LED chip (in a broad sense, resin-sealed (sealed with a light-transmitting resin)). It is a lens for condensing light from the light emitting element chip). That is, in the surface-mounted light emitting unit 150, the LED chip is disposed below the dome-shaped lens 151, and the light from the LED chip is condensed by the dome-shaped lens 151 and emitted to the object. Thereby, since the intensity | strength of the light irradiated to a target object can be strengthened, the optical efficiency of a photon detection unit can be improved and it becomes possible to perform a more exact measurement.

  Taking a pulse meter as an example of the biological information measuring device, the light emitted from the light emitting unit 150 travels inside the subject, which is the object, and diffuses or scatters in the epidermis, dermis, subcutaneous tissue, and the like. Thereafter, this light reaches the blood vessel (detected site) and is reflected. At this time, part of the light is absorbed by the blood vessels. Then, the light absorption rate in the blood vessel changes due to the influence of the pulse, and the amount of reflected light also changes. Therefore, the light receiving unit 140 receives this reflected light and detects the change in the amount of light, thereby detecting biological information. It becomes possible to detect the pulse rate and the like.

  In such a biological information measuring device, blood flow on the skin surface is optically measured and converted into a signal to obtain biological information such as a pulse wave and a pulse. Therefore, in order to improve the accuracy and portability of the measurement, noise components such as disturbance light in the optical path from the light emitting unit 150 to the light receiving unit 140 are reduced, or the light is directly incident on the light receiving unit 140 from the light emitting unit 150. It is important to reduce light (direct light, etc.). From such a point of view, the inventors provide a recess in the case portion having a translucent member described below, or the contact surface of the translucent member with the subject and the contact surface of the case portion with the subject. By defining the positional relationship to a predetermined relationship, or by providing a light-shielding part and rigorously examining and verifying the dimensional relationship of this light-shielding part (wall part), it is portable while ensuring the accuracy and stability of measurement. The arrangement (configuration) and dimensional relationship of the light-shielding part (wall part) excellent in performance were found.

  The sensor unit 40 in this configuration example is provided with a first wall portion 71 and a second wall portion 72 as frame-shaped light shielding portions surrounding the outer periphery 140b of the light receiving portion 140 and the outer periphery 150b of the light emitting portion 150, respectively. At least a part of the second wall portion 72 surrounding the light receiving portion 140 mounted on the support surface 160a of the substrate 160 as the support portion includes a wall portion 70 as a light shielding portion. The wall part 70 is provided between the light receiving part 140 and the light emitting part 150. The frame-like first wall portion 71 and second wall portion 72 form a desired space on the upper surfaces of the light receiving portion 140 and the light emitting portion 150. Further, the first wall portion 71 and the second wall portion 72 become light components such as direct light directly incident on the light receiving portion 140 from the light emitting portion 150 and noise components incident on the light receiving portion 140 by the wall portion 70. Blocks light such as ambient light. As described above, by providing the wall portion 70 on at least a part of the second wall portion 72, it is possible to prevent light emitted from the light emitting portion 150 from directly reaching (entering) the light receiving portion 140. Can do. Thereby, light with less noise component can be incident on the light receiving unit 140, and the measurement accuracy of the biological information measurement module can be further improved.

  And the frame-shaped 1st wall part 71 and the 2nd wall part 72 can be formed by the sheet-metal processing of a metal plate, for example. Thus, if the 1st wall part 71 and the 2nd wall part 72 are formed by sheet-metal processing of a metal plate, it will be easily made into the 1st wall part 71 and the 2nd wall part 72 which were cheap and excellent in intensity. The first wall portion 71 and the second wall portion 72 made of metal can reflect light, and the light emitted from the light-emitting portion 150 can be efficiently irradiated to the subject that is the object or from the subject. Can be efficiently incident on the light receiving unit 140. The first wall portion 71 and the second wall portion 72 include a resin (including natural resin and synthetic resin) such as rubber as a material other than the metal material. These materials can be easily obtained at low cost, and the first wall 71 and the second wall 72 can be easily formed.

  In the sensor unit 40, the light from the measurement object (subject, for example, the skin of the subject) is accurately received by the light receiving unit 140, and accurate biological information is acquired from the object to the light receiving unit 140. The distance (interval) is important, and in order to maintain this distance (interval) at a predetermined value, a configuration capable of appropriately and stably maintaining the contact state between the sensor unit 40 and the object. Desired. In the present embodiment, the light emitted from the light emitting unit 150 to the subject (object) as a configuration that enables the contact state between the sensor unit 40 and the object to be appropriately and stably maintained. And the light which the light reflected by the target object (light which passed through the target object) permeate | transmits, and the case part which has this translucent member 50 and contacts a subject is contacted with the subject 30 (bottom case 36), and when the second surface 50b of the translucent member 50 facing the first surface 50a contacting the subject of the translucent member 50 is used as a reference, the second surface 50b to the first surface The distance to 50a is shorter than the distance from the 2nd surface 50b to the surface 30a which contacts the target object (subject) of case part 30 (bottom case 36). That is, in the sensor unit 40, a part of the surface 30 a near the translucent member 50 of the case unit 30 (bottom case 36) in contact with the subject is more than the first surface 50 a of the translucent member 50 in contact with the subject. It protrudes to the subject side (for example, the skin side of the subject).

  Further, as described above, the sensor unit 40 is formed by the case unit 30 (bottom case 36), and has a convex part 52 as a projecting part that comes into contact with and applies pressure to the skin surface as the subject. The top portions 52t1 and 52t2 projecting to the subject side of the convex portion 52 are part of the surface 30a that is located on the subject side with respect to the first surface 50a of the translucent member 50 and contacts the subject. Yes. The top portions 52t1 and 52t2 will be described in detail. In the sensor portion 40, the case portion 30 (in the vicinity of the translucent member 50 and in contact with the subject (for example, the skin 411 of the wrist 410 of the subject described later with reference to FIG. 8)). The first part of the bottom case 36) that is closest to the skin 411 of the convex part 52 is the top part 52t1, and is located on the opposite side of the top part 52t1 that is the first part of the convex part 52 with the translucent member 50 interposed therebetween. The 2nd site | part located in the most skin 411 side of the convex part 52 to do becomes the top part 52t2. As a result, as shown in FIG. 8, in the wearing state of the biological information measuring device (sensor unit 40) in which the skin 411 of the wrist 410 of the subject is in contact with the first surface 50 a of the translucent member 50, The surface 30a that contacts the skin 411 of the case portion 30 (bottom case 36) is pressed more strongly by the skin 411 at the top portions 52t1 and 52t2 of the convex portion 52 than the first surface 50a. It is possible to stably maintain the contact state with the skin 411 of the subject.

  Based on the following formula (2) for obtaining the amount of deflection in the both-end support of a simple beam whose both ends are open ends, the inventors have received the light receiving portion of the skin as the subject (skin 411 of the wrist 410 of the subject in FIG. 8). The amount of deformation on the 140 side (in the direction from the first surface 50a to the second surface 50b of the translucent member 50 in FIG. 8) is obtained, and the contact state between the sensor unit 40 and the object is appropriately and stably maintained. It has been found that it is possible to set a suitable state. Specifically, when two top portions 52t1 and 52t2 positioned in the width direction with the width dimension L in the convex portion 52 of the case portion 30 (bottom case 36) are the support portions at both ends, the top portions 52t1 and 52t2 side of the skin 411 are provided. From the second surface 50b of the translucent member 50 to the top portions 52t1 and 52t2, and the second surface 50b to the first surface 50a. It can be suitably set by the correlation with the difference Δh from the distance up to.

ｗ：全荷重、Ｅ：ヤング率、Ｉ：断面二次モーメント、ｌ：支持部間の距離

w: total load, E: Young's modulus, I: sectional moment of inertia, l: distance between supports

  More specifically, in the above formula (2), the skin 411 of the subject is regarded as a beam with open ends, and two top portions 52t1 and 52t2 in the width direction of the convex portion 52 of the case portion 30 (bottom case 36) are supported. The bending amount (δmax) of the both-end support beam (simple beam) when it is used as the portion is the distance from the second surface 50b to the first surface 50a of the translucent member 50 and the top portion 52t1 of the convex portion 52 from the second surface 50b. , 52t2 is the difference Δh. In other words, Δh is the skin of the subject most in the vicinity of the translucent member 50 among the first surface 50a that is the contact surface of the translucent member 50 with the subject and the surface 30a of the case portion 30 that contacts the subject. It is a difference from the top portions 52t1 and 52t2 that are portions protruding to the 411 side, and is closer to the subject's skin 411 side than the first surface 50a of the translucent member 50 out of the surface 30a that contacts the subject of the case portion 30. It can be said that the top parts 52t1 and 52t2 of the protruding convex part 52 protrude by Δh toward the skin 411 side of the subject.

  Here, the total load w is a pressure that is pressed against the first surface 51a, which is the contact surface of the translucent member 50 with the skin 411, and the surface 30a of the case portion 30 that contacts the skin 411. By appropriately selecting from 4 KPa to 12 KPa, which is an appropriate pressure, and setting the Young's modulus E and the secondary moment of inertia I as a coefficient for the skin of the subject (human), w / EI can be set as the coefficient a. . The distance between the support portions is the distance between the two top portions 52t1 and 52t2 in the width direction (X-axis direction in the figure) of the convex portion 52 of the case portion 30 (bottom case 36) (hereinafter referred to as “width dimension L”). ). From these, the difference Δh between the distance from the second surface 50b of the translucent member 50 to the top portions 52t1 and 52t2 and the distance from the second surface 50b to the first surface 50a is defined as the width dimension of the case portion 30 (bottom case 36). L and the coefficient a can be defined, and the following equation (3) is obtained. Then, by setting the difference Δh to the configuration represented by the expression (3), the sensor unit 40 and the target object that can accurately receive the light that has passed through the skin 411 of the subject. It has been found that the contact state can be set to a suitable state that can be held appropriately and stably.

  According to the above-described configuration, in the sensor unit 40, the convex portion 52 of the case unit 30 (bottom case 36) that is located near the translucent member 50 and contacts the subject (skin 411 of the wrist 410 of the subject in FIG. 8). Between the top portion 52t1 as the first portion and the top portion 52t2 of the convex portion 52 as the second portion that is located on the opposite side of the top portion 52t1 that is the first portion of the convex portion 52 across the translucent member 50. When the distance is L, the distance from the second surface 50b to the first surface 50a of the translucent member 50, and the top portion 52t1 of the convex portion 52 that is the first portion and the second portion described above from the second surface 50b. , 52t2 is preferably configured in a range represented by the following formula (3). Note that “0.01” and “0.006” in the expression (3) are constants corresponding to the coefficient a described above, and are coefficients obtained empirically.

  As shown in FIG. 6, on the contact surface with the object (subject) in the sensor unit 40 constituted by the first surface 50 a of the translucent member 50 and the surface 30 a of the case unit 30 (bottom case 36). The top portions 52t1 and 52t2 of the convex portion 52 formed in the vicinity of the translucent member 50 of the case portion 30 (bottom case 36) protrude from the first surface 50a of the translucent member 50 toward the subject side by Δh. Is preferable. Here, when the distance L (width dimension L) between the top portion 52t1 as the first portion and the top portion 52t2 as the second portion is set, the difference Δh is configured in a range represented by the above formula (3). By doing so, the contact state between the sensor unit 40 and the target object (skin 411) that can be accurately received by the light receiving unit 140 with the light passing through the target object (subject's skin 411), and A stable state can be maintained.

  In addition, the width L between the two top portions 52t1 and 52t2 in the direction connecting the light receiving portion 140 and the light emitting portion 150 (X-axis direction in the figure) is set to 3.0 mm ≦ L <4.5 mm. It has been found that the sensor unit 40 capable of acquiring accurate biological information without impairing portability in life can be obtained. Details will be described below.

The skin 411, which is a measurement object of the sensor unit 40, for example, a blood vessel as an example of an object to be noted is about 0.3 mm below the skin, and the light receiving unit 140 accurately receives reflected light from such an object. In order to do so, it is more advantageous that the width dimension L, which is the opening dimension of the translucent member 50 functioning as a detection window, is larger. However, increasing the width dimension L results in an increase in the area in the planar direction of the biological information measurement module, thereby impairing portability. For example, when the width dimension L exceeds 4.5 mm, the sensor unit 40 becomes too large, and the sensor unit 40 may be displaced due to an impact during exercise. is there.
On the other hand, if the width dimension L is too small, the light receiving area that receives the reflected light from the skin 411 as the object in the light receiving unit 140 becomes small, and it becomes difficult to sufficiently receive the light amount necessary for the measurement. Due to such factors, for example, unless the width dimension L is secured to 3.0 mm or more, the reflected light from the blood vessel cannot be accurately received by the light receiving unit.

  The inventors diligently confirm and verify, and the difference Δh between the distance from the second surface 50b to the top portion 52t of the translucent member 50 and the distance from the second surface 50b to the first surface 50a in the above formula (3). In addition to the top portion 52t1 as the first portion of the convex portion 52 of the case portion 30 (bottom case 36) and the top portion 52t1 that is the first portion of the convex portion 52 with the translucent member 50 interposed therebetween. It discovered about the suitable structure of the distance L (above-mentioned width dimension L) with the top part 52t2 of the convex part 52 as a 2nd site | part located. Specifically, the width dimension L is preferably 3.0 mm ≦ L <4.5 mm, and the width dimension L is more preferably 4.0 mm ≦ L <4.5 mm.

  The verification results relating to the difference Δh between the distance from the second surface 50b to the top 52t and the distance from the second surface 50b to the first surface 50a and the width dimension L described above are shown in Tables 1 to 5 in FIG. Shown in In Tables 1 to 5, the sensor unit mounted on the wrist of the subject seated on the chair was shaken at a constant period for 1 minute, and evaluated by the ratio of the pulse signal acquired by the light receiving unit 140 and the power of the body motion artifact. The ratio of the pulse signal and the power of the body motion artifact will be described as “SN ratio” below. In Tables 1 to 5 of FIG. 9, as evaluation results, an SN ratio of 1 or more is “preferable (◎)”, an SN ratio of 0.5 to 1 is “appropriate (◯)”, and an SN ratio is 0.5 or less. However, “possible (Δ)” indicates that the signal can be determined as a pulse signal, and “impossible (×)” indicates that the signal cannot be determined as a pulse signal.

  As shown in Table 1 to Table 5 in FIG. 9, when the distance (width dimension) L is 6.0 mm, 5.0 mm, 4, 5 mm, 4.0 mm, and 3.0 mm, “preferable (好 適” ) ”. At this time, the value of the coefficient a in Expression (3) is 0.010 ≦ a ≦ 0.078. Similarly, the value of the coefficient a when the evaluation result is “appropriate (◯)” is 0.008 ≦ a ≦ 0.084. Based on such an evaluation result, it can prescribe | regulate as a suitable range of the width dimension L, and a preferable range. However, the width dimension L has a range determined to be “preferable (）)” at 6.0 mm and 5.0 mm, but if the width dimension L exceeds 4.5 mm, the portability is impaired as described above. become. Therefore, the width dimension L that can be suitably applied is 3.0 mm ≦ L <4.5 mm. Thus, by setting the width dimension L to 3.0 mm ≦ L <4.5 mm, it is possible to acquire accurate biological information without impairing portability in daily life including exercise. 40.

  However, even when the width dimension L exceeds 4.5 mm, if the width dimension L is 5.0 mm or less, the area in the planar direction of the biological information measuring device becomes large, which causes a sense of incongruity at the time of wearing. The inventor confirmed that there was no deterioration in portability. Further, as shown in Table 2 to Table 4 in FIG. 9, when the width dimension L is in the range of 4.0 mm ≦ L ≦ 5.0 mm, Δh described above is 0.15 mm ≦ Δh ≦ 0.17 mm. Thus, the inventor has found that it is possible to acquire accurate biological information that can be determined as “preferable (（)” without impairing portability in daily life.

As shown in Table 3 of FIG. 9, when the width dimension L is 4.5 mm, the range that can be determined as “preferable (◎)” can be further widened. By making it into the range, it becomes easier to perform the measurement more suitably. However, as described above, when the width dimension L exceeds 4.5 mm, the portability is impaired. Therefore, it can be said that the range of 4.0 mm ≦ L <4.5 mm is more preferable. By setting the width dimension L in such a range, it becomes easy to perform more accurate measurement of biological information while maintaining portability.
Further, as shown in Table 3, when the width dimension L is 4.5 mm, the value of the difference (height difference) Δh within the range that can be determined as “preferable (◎)” is 0.055 mm ≦ Δh ≦ 0.314 mm. It has become. Therefore, when the width dimension L is 4.5 mm which is the upper limit that does not impair the portability of the device, the difference Δh that is suitably applicable is set in the range of 0.05 ≦ Δh ≦ 0.3 mm. It is possible to provide the sensor unit 40 capable of acquiring accurate biological information without impairing portability in daily life including time.

  In the sensor unit shown in FIG. 7, a connection terminal 274 that is electrically connected to a control unit (not shown) is provided on a support surface 160a of a substrate 160 (sensor substrate) serving as a support unit. The connection terminal 274 is a terminal for establishing an electrical connection, and can be formed by applying gold (Au) plating to a metal layer, for example, a copper (Cu) layer. By providing such a connection terminal 274 on the substrate 160, it is possible to connect the support portion and, for example, the control portion etc. in a compact manner.

  Further, reflection suppression processing may be performed on at least the surface of the wall portion 70 or the second wall portion 72 on the light receiving portion 140 side. For example, the color of the surface (inner side surface, etc.) of the wall part 70 is set to a predetermined color such as black so as to prevent irregular reflection of light. Alternatively, the surface of the wall portion 70 may have a moth-eye structure. For example, an uneven structure having a period of several tens to several hundreds of nanometers is formed on the surface to form an antireflection structure. By performing such reflection suppression processing, for example, it is possible to effectively suppress a situation in which reflected light on the surface of the wall portion 70 becomes stray light and becomes a noise component of the detection signal.

  As described above, the light receiving unit 140, the light emitting unit 150, and the wall unit 70 are mounted on the substrate 160. The substrate 160 is, for example, a rigid substrate. The board 160 has terminals (not shown) for connecting to signal / power terminals (not shown) of the light receiving unit 140 and terminals (not shown) for connecting signals / power to an external main board (not shown). (Not shown) is provided. For example, the terminals of the light receiving unit 140 and the terminals of the substrate 160 are connected by wire bonding or the like. As described above, the light receiving unit 140, the light emitting unit 150, the wall unit 70, and the like are mounted (supported) on the substrate 160, so that the distance between the light emitting unit 150 and the light receiving unit 140 and the measurement object is shortened. Noise mixed in light can be reduced, and measurement accuracy can be improved.

  In addition, as shown in FIG. 6, the sensor unit 40 may be provided with apertures 80 a and 80 b. The diaphragm unit 80 squeezes light from the subject or light from the light emitting unit 150 in the optical path between the subject and the sensor unit 40. In FIG. 6, the aperture portions 80 a and 80 b are provided between the case portion 30 (bottom case 36) and the light emitting portion 150. However, the diaphragm portions 80 a and 80 b may be provided between the light transmitting member 50 and the light emitting portion 150 or in the light transmitting member 50.

  The translucent member 50 shown in FIG. 6 is provided on the surface of the biological information measuring device that is in contact with the subject, and transmits light from the subject. The translucent member 50 contacts the subject when measuring the biological information of the subject. The translucent member 50 comes into contact with the subject as a detection window provided on the convex portion 52 formed by the case portion 30. Note that the surface shape of the first surface 50a, which is the contact surface of the translucent member 50 with the subject, is a flat surface in the present embodiment, but is not limited thereto, and is, for example, a curved surface shape (spherical shape). Various shapes can be adopted. The translucent member 50 may be any member that can transmit the wavelength of light from the subject, and may be a transparent material or a colored material.

  The translucent member 50 has a recess 56 in the second surface 50b on the back side of the first surface 50a on the side in contact with the subject. In the space of the concave portion 56, a light receiving portion 140, a light emitting portion 150, a wall portion 70, and an aperture portion (80a, 80b) are provided.

  Further, on the surface on the subject side of the biological information measuring apparatus, the convex portion 52 having the translucent member 50 as a detection window is a part of the surface 30a that contacts the subject of the case portion 30 (bottom case 36). , Projecting to the subject side from other parts. By providing such a convex portion 52, for example, it is possible to give an initial pressure to the subject to exceed the vein vanishing point. Here, the vein vanishing point is reduced to such an extent that the signal caused by the vein superimposed on the pulse wave signal disappears or does not affect the pulse wave measurement when the convex portion 52 is brought into contact with the subject and the pressure is gradually increased. It is a point.

  According to the configuration of the above-described embodiment, in the sensor unit 40, the top portion 52t1 as the first portion of the convex portion 52 of the case portion 30 (bottom case 36) that is located in the vicinity of the translucent member 50 and contacts the subject. The distance L (width dimension L) between the second portion 50b and the top portion 52t2 of the convex portion 52 as the second portion, the distance from the second surface 50b to the first surface 50a of the translucent member 50, and the second surface 50b By defining the relationship of the difference Δh with the distance to the top portions 52t1 and 52t2 of the convex portion 52, which is the first portion and the second portion, in the relationship of the above-described formula (3), an object to be measured (for example, Since it is possible to appropriately and stably hold the contact state between the object that can be accurately received by the light receiving unit 140 and the sensor unit 40 with light that has passed through the skin 411 and blood vessels (not shown), For example, biological information such as pulse waves It is possible to accurately obtain. In addition, it is possible to obtain the sensor unit 40 as a biological information measurement module that can acquire accurate biological information without impairing portability even when performing daily life or strenuous exercise.

  Note that the present invention is not limited to the above-described embodiment, and various modifications and improvements can be added to the above-described embodiment. A modification will be described below.

(Modification 1)
FIG. 10 is a front sectional view schematically showing a sensor unit according to Modification 1 of the biological information measuring device.
In the said embodiment, as FIG. 6, as a protrusion part which contacts and presses the skin surface which is a target object on the contact surface side with the target object (subject) in the sensor part 40 of a biological information measuring device. Although it has been described that the convex portion 52 has a configuration formed in the vicinity of the translucent member 50 of the case portion 30 (bottom case 36), the convex portion 52 is not limited to this configuration.
Hereinafter, the sensor unit 40B according to Modification 1 will be described. In addition, about the same component as the said embodiment, the same number is attached | subjected and the overlapping description is abbreviate | omitted.

  A sensor unit 40B of the biological information measuring apparatus according to the present modification shown in FIG. 10 transmits a light from a subject and has a translucent member 50B having a first surface 50Ba that contacts the subject, and the translucent member 50B. And a case portion 30B having a surface 30Ba in contact with the subject. The translucent member 50B has, on the first surface 50a side, a convex portion 52B that contacts and presses the skin surface on the subject side. The surface shape of the convex portion 52B is desirably a curved surface shape (spherical shape) as shown in FIG. 10, but is not limited to this, and various shapes can be adopted.

  The portion near the translucent member 50B of the case portion 30B has a shape along the shape of the first surface 50Ba side of the translucent member 50B including the above-described convex portion 52B, and the first portion at the center of the convex portion 52B. An opening for exposing the surface 50Ba is formed. The opening of the case part 30B functions as a detection window in the measurement of biological information of the subject by the sensor part 40B. In addition, the top portions 52t1 and 52t2 that are the thickest portions of the case portion 30B that form the edge of the opening protrude from the first surface 50Ba of the convex portion 52B of the translucent member 50B toward the subject, for example, the skin of the subject. ing. Thereby, in the state in which the biological information measuring device (sensor unit 40B) is attached to the subject (subject), the surface that contacts the skin 411 of the case portion 30B rather than the first surface 50Ba of the convex portion 52B of the translucent member 50B. When 30Ba is strongly pressed by the skin at the top portions 52t1 and 52t2, the contact state between the sensor unit 40B and the skin of the subject as the subject can be stably maintained.

Note that, in the configuration of the sensor unit 40B of the present modified example, similarly to the sensor unit 40 of the above-described embodiment, the width of the opening of the case unit 30B described above and the top 52t1 as the first part and the second part The distance (width dimension) L between the top portion 52t2 as a portion, the distance from the second surface 50Bb of the translucent member 50B to the first surface 50Ba immediately below the top portions 52t1 and 52t2, and the top portion from the second surface 50Bb The difference from the distance to 52t1 and 52t2 (the distance between the top portions 52t1 and 52t2 and the first surface 50Ba of the translucent member 50B immediately below) Δh is configured in the range represented by the above equation (3). Is preferred.
Further, in the sensor unit 40B of the present modification, as in the sensor unit 40 described in the above embodiment, the width dimension L that is the distance between the top 52t1 and the top 52t2 that is the width of the opening of the case 30B is: It is preferable that 3.0 mm ≦ L <4.5 mm, and when the width dimension L is the upper limit of 4.5 mm that does not impair the portability of the device, the difference Δh that can be suitably applied is 0.05 ≦ Δh. By setting in the range of ≦ 0.3 mm, it is possible to obtain the sensor unit 40B that can acquire accurate biological information without impairing portability in daily life including exercise.

(Modification 2)
FIG. 11 is a front sectional view schematically showing a sensor unit according to Modification 2 of the biological information measuring device.
In the said embodiment and the modification 1, as shown in FIG. 6 and FIG. 10, it contacts the skin surface which is a target object on the contact surface side with the target object (subject) in the sensor parts 40 and 40B of a biological information measuring device. In the above description, the protrusions 52 and 52B are provided as the protrusions that apply the pressure. However, the present invention is not limited to these structures.
Hereinafter, the sensor unit 40C according to Modification 2 will be described. In addition, about the same component as the said embodiment, the same number is attached | subjected and the overlapping description is abbreviate | omitted.

  As shown in FIG. 11, the sensor unit 40C of the biological information measuring device according to the modified example 2 transmits a light from the subject and has a first surface 50Ca that contacts the subject, and the transparent member 50C. A case portion 30C having an optical member 50C and a surface 30Ca in contact with the subject is provided. The translucent member 50C of this modification has a flat plate shape in which the first surface 50Ca and the second surface 50Cb facing each other are substantially parallel.

  A portion of the case portion 30C near the translucent member 50C has a shape along the first surface 50Ca of the translucent member 50C, and an opening for exposing the first surface 50Ca at the center of the translucent member 50C is formed. ing. The opening part of the case part 30C functions as a detection window in the measurement of biological information of the subject by the sensor part 40C. In addition, the surface 30Ca that contacts the subject of the case portion 30C that forms the edge of the opening is located on the subject side (for example, the skin side of the subject) with respect to the first surface 50Ca of the translucent member 50C.

According to the configuration of this modified example, the subject (subject) of the biological information measuring device (sensor unit 40C) even if the configuration does not include the convex portions 52 and 52B as in the above-described embodiment and modified example 1. ), The surface 30Ca that contacts the skin of the case 30C rather than the first surface 50Ca of the translucent member 50C is the edge of the opening described above (the translucent member 50C in the opening of the case 30C). By being strongly pressed by the skin at the sandwiched first part and second part), it is possible to stably hold the contact state between the sensor unit 40C and the skin of the subject as the subject.
Note that, in the configuration of the sensor unit 40C according to the second modification, as in the sensor unit 40 according to the above-described embodiment, the width L (width dimension L) of the opening of the case unit 30C described above and the first of the translucent member 50C. The difference between the distance from the second surface 50Cb to the first surface 50Ca and the distance from the second surface 50Cb to the first surface 30Ca of the case portion 30C (the first translucent member 50C near the edge of the opening of the case portion 30C) The distance (Δh) from one surface 50Ca to the surface 30Ca in contact with the subject of the case portion 30C is preferably configured in a range represented by the above equation (3).
Further, the width dimension L which is the width of the opening of the case part 30C is preferably 3.0 mm ≦ L <4.5 mm, and the width dimension L is 4.5 mm which is the upper limit which does not impair the portability of the device. In some cases, by appropriately setting the difference Δh within the range of 0.05 ≦ Δh ≦ 0.3 mm, accurate biological information can be obtained without impairing portability in daily life including exercise. It is possible to obtain a sensor unit 40C capable of performing the above.

(Modification 3)
FIG. 12 is a partial cross-sectional view schematically showing a sensor unit according to Modification 3 of the biological information measuring device.
Hereinafter, a sensor unit according to Modification 3 will be described. In addition, about the same component as the said embodiment, the same number is attached | subjected and the overlapping description is abbreviate | omitted.

  Although not shown, the sensor unit according to the present modification includes a translucent member having any one of the configurations of the above-described embodiment and the first and second modifications, and a case unit having the translucent member, and is attached to the measurement device. In the state, the contact state between the sensor unit and the target object that can be accurately received by the light receiving unit with the light passing through the measurement target (subject) is appropriately and stably maintained, and the living body It is possible to obtain information accurately. Based on this premise, the arrangement of sensor elements and the mounting method on the substrate in this modification will be described below.

  In FIG. 12, the sensor unit (light detection unit) of Modification 3 is disposed between the light emitting unit 150 mounted on the substrate 160 </ b> A (sensor substrate), the light receiving unit 140, and the light emitting unit 150 and the light receiving unit 140. And a wall portion 70 as a light shielding portion. The light emitting unit 150 includes a configuration that is not described in the above embodiment. That is, the light emitting unit 150 includes a lens 151 and a pedestal 155 that serves as a pedestal for the light emitting unit 150.

  In a biological information measuring apparatus that detects biological information or the like, it is necessary to detect a high-quality signal in the light detection unit. For this purpose, it is effective to use a high-performance light emitting unit (for example, LED). Various viewpoints for evaluating the performance of the light emitting unit are conceivable. For example, it is possible to assume that the luminance is high and the light beam angle is narrow. In such a light emitting unit, strong light is irradiated to a more limited range, so that the intensity of reflected light reflected by, for example, a living body becomes strong, and as a result, the intensity of light received by the light receiving unit is increased. It can be strengthened. However, since such a light emitting unit is larger in size than a light emitting unit with relatively low performance, there arises a problem that the photodetection unit cannot be miniaturized, and the portability of the biological information measuring device is impaired. There is a fear.

  Therefore, in the light detection unit of this modification, a hole portion 169 that is slightly smaller than the base portion 155 is provided at the position where the light emitting portion 150 of the substrate 160A is disposed, and the light emitting portion 150 is attached to the hole portion 169 of the substrate 160. It has been.

  According to the configuration of this modification, the height of the light emitting unit 150 can be absorbed by an amount corresponding to the depth of the hole 169. Therefore, it is possible to reduce the size by suppressing the thickness (height) of the light detection unit itself, and also to reduce the difference in height between the light emitting unit 150 and the light receiving unit 140. Therefore, the present invention provides a small-sized biological information measuring apparatus that can detect a high-quality signal and measure biological information with higher accuracy by using the high-performance light emitting unit 150 without impairing portability. be able to.

(Modification 4)
FIG. 13 is a perspective view schematically showing a sensor unit according to Modification 4 of the biological information measuring device.
Hereinafter, a biological information measuring apparatus according to Modification 4 will be described. In addition, about the same component as the said embodiment, the same number is attached | subjected and the overlapping description is abbreviate | omitted. For example, the sensor unit according to the present modification also includes a light-transmitting member having the structure of any one of the above-described embodiment and the first and second modifications, and a case unit having the light-transmitting member, although not illustrated. Assuming that the contact state between the object and the sensor unit is appropriately and stably maintained and that it is possible to accurately acquire biological information, the arrangement of the sensor elements in this modification will be described below. A method of mounting on a substrate will be described.

  In FIG. 13, the sensor unit (light detection unit) of the biological information measuring device according to Modification 4 will be described as the sensor unit of the heart rate monitoring device that monitors the heart rate as biological information. Although the heart rate monitoring device 1020 (sensor unit) as the biological information measuring device according to the modified example 4 is not illustrated in FIG. 13, as in the first embodiment, the user's arm is fixed by a fixing unit such as a band. It is attached to.

  The heart rate monitoring device 1020 (sensor unit) according to the modification 4 includes a plurality of (in this example, two) light emitting elements 1221 and 1223 as light emitting units and a light receiving element 1222 as one light receiving unit in a line. They are arranged side by side. Specifically, a sensor 1022 including at least two sensor elements (in this example, as three sensor elements, two light emitting elements 1221 and 1223 serving as a first light emitting unit and a second light emitting unit, and a light receiving unit) And a light receiving element 1222 as the above. Although not shown, a wall portion serving as a light shielding portion having the same configuration as that of the above-described embodiment and modification is provided between the light receiving element 1222 and the light emitting element 1221 and between the light receiving element 1222 and the light emitting element 1223. It is desirable that

  And the light receiving element 1222 as a light-receiving part is arrange | positioned between the two light emitting elements 1221 and 1223 as a 1st light-emitting part and a 2nd light-emitting part. Further, the two light emitting elements 1221 and 1223 as the first light emitting part and the second light emitting part are arranged at positions symmetrical with respect to an imaginary line passing through the center of the light receiving element 1222 as the light receiving part. By arranging the light emitting elements 1221 and 1223 and the light receiving element 1222 in such a manner, dead space is reduced and space saving can be achieved. Moreover, the light which combined the 1st light emission part and 2nd light emission part in a line symmetrical position gathers in a light-receiving part, and can perform more exact detection.

  The sensor element detects a sensor signal. The sensor 1022 includes an optical sensor composed of light emitting elements 1221 and 1223 using two LEDs for emitting light to the user's skin, and at least one light receiving element 1222 (photodiode for receiving light reflected from the skin). ). Furthermore, the heart rate monitoring apparatus 1020 has a case part or a housing (not shown). For example, the case part or the housing is preferably similar to or the same as the case part 30 having the translucent member 50 in the above-described embodiment.

  The sensor 1022 is carried on one surface of a carrier (substrate) 1026. Here, a configuration including a carrier (substrate) 1026 and a sensor 1022 carried on the carrier (substrate) 1026 corresponds to the biological information measurement module. The same applies to Modification 5 below. Light emitted from the light emitting elements 1221 and 1223 is reflected without being absorbed by the skin or the like, and can reach the light receiving element 1222 directly. In the heart rate monitoring device 1020, the distance between the carrier 1026 and the upper surfaces 1221a and 1223a of the light emitting elements 1221 and 1223 is smaller than the distance between the carrier 1026 and the upper surface 1222a of the light receiving element 1222. That is, the difference between the distance between the carrier 1026 and the upper surfaces 1221a and 1223a of the light emitting elements 1221 and 1223 and the distance between the carrier 1026 and the upper surface 1222a of the light receiving element 1222 is Δt. The light receiving element 1222 receives light from the upper surface 1222a which is the uppermost surface layer. According to these configurations, most of the light emitted from the light emitting elements 1221 and 1223 is directed to the skin, and the reflected light is directly incident on the light receiving element 1222 without intervention such as an air layer. In other words, since the light receiving element 1222 is in close contact with the skin, a structure in which a gap is not easily generated between the upper surface (light receiving surface) 1222a of the light receiving element 1222 and the skin can be obtained. Light that becomes a noise source can be prevented from entering the upper surface 1222a. Further, light from the light emitting elements 1221 and 1223 that does not pass through the skin, for example, light that is directly incident on the light receiving element 1222 from the light emitting elements 1221 and 1223 cannot reach the upper surface 1222a of the light receiving element 1222.

(Modification 5)
Next, a heart rate monitoring device 1030 (sensor unit) as a biological information measuring device according to Modification 5 will be described with reference to FIG. FIG. 14 schematically illustrates a sensor unit according to Modification 5 of the biological information measurement device, and is a cross-sectional view illustrating the sensor unit of the heart rate monitoring device as the biological information measurement device. Although not shown in FIG. 14, the heart rate monitoring device 1030 as the biological information measuring device according to this modification is attached to the user's arm by a fixing unit such as a band, as in the above-described embodiment. The Further, the sensor unit according to this modification also includes a translucent member having any one of the configurations of the above-described embodiment and the first and second modifications, and a case unit having the translucent member, although not illustrated. Assuming that the contact state between the object and the sensor unit is appropriately and stably maintained and that it is possible to accurately acquire biological information, the arrangement of the sensor elements in this modification will be described below. And a method of mounting on the substrate will be described.

  As shown in FIG. 14, the electrical connection terminals 1034 of the light emitting elements 1221 and 1223 as light emitting parts and the light receiving element 1222 as a light receiving part are made of an insulating material (for example, epoxy resin) 1032 for protection of electrical elements. Should preferably be covered. Further, the insulating material 1032 can be configured not to cover the light emitting elements 1221 and 1223 and the light receiving element 1222. Specifically, a region between the light-emitting element 1221 and the light-receiving element 1222 and a region between the light-emitting element 1223 and the light-receiving element 1222 can be filled with an insulating material 1032. In other words, at least the upper surface 1222a of the light receiving element 1222 and the upper surfaces 1221a and 1223a of the light emitting elements 1221 and 1223 can be configured not to be covered with the insulating material 1032. By comprising in this way, the interference by the air gap between skin and the light emitting elements 1221 and 1223 can be suppressed. Furthermore, the insulating material 1032 may be configured to cover the upper surfaces 1221a and 1223a of the light emitting elements 1221 and 1223 and the upper surface 1222a of the light receiving element 1222. With this configuration, the upper surface 1222a of the light receiving element 1222 that comes into contact with the skin and the upper surfaces 1221a and 1223a of the light emitting elements 1221 and 1223 can be protected, so the upper surface 1222a of the light receiving element 1222 and the light emitting element 1221 Damage to the top surfaces 1221a and 1223a of 1223 can be prevented. In this case, the insulating material 1032 can also be regarded as a protective film.

  In a heart rate monitoring device 1030 (sensor unit) as a biological information measuring device according to the fifth modification, an insulating material 1032 using an epoxy resin is provided as a generally possible embodiment. In FIG. 14, the insulating material 1032 is disposed without covering the upper surfaces 1221 a and 1223 a of the light emitting elements 1221 and 1223, and protects the electrical connection terminal 1034. Light emitted from the light emitting elements 1221 and 1223 is represented by arrows.

  In this way, the insulating material 1032 is placed with the minimum amount that does not interfere with the correct function of the heart rate monitoring device 1030, thereby protecting the electrical connection terminals 1034 of the light emitting elements 1221 and 1223 and the light receiving element 1222. Thus, the heart rate monitoring device 1030 can be further improved. Furthermore, the heart rate monitoring apparatus 1030 has a case part or a housing (not shown), and the case part or the housing is similar to the case part 30 having the translucent member 50 in the above-described embodiment, for example. Or it is desirable to make it the same.

(Modification 6)
FIG. 15 is a partial cross-sectional view schematically showing a sensor unit according to Modification 6 of the biological information measuring device.
Hereinafter, the sensor unit of the biological information measuring device according to Modification 6 will be described. In addition, about the same component as the said embodiment, the same number is attached | subjected and the overlapping description is abbreviate | omitted. Further, the sensor unit according to this modification also includes a translucent member having any one of the configurations of the above-described embodiment and the first and second modifications, and a case unit having the translucent member, although not illustrated. Assuming that the contact state between the object and the sensor unit is appropriately and stably maintained and that it is possible to accurately acquire biological information, the arrangement of the sensor elements in this modification will be described below. Etc. will be described.

The sensor unit of the biological information measuring apparatus of this modification shown in FIG. 15 includes a first light receiving unit 140 that receives light from the subject, a second light receiving unit 141 that receives light from the subject, And a single light emitting unit 150 that emits light to the specimen. In addition, the sensor unit of the present modification is provided at a position closer to the subject than the first light receiving unit 140, the second light receiving unit 141, and the light emitting unit 150, transmits light from the subject, and And a translucent member 50B including a convex portion 52B that contacts and presses the subject when measuring the biological information of the subject. In the present modification, a description will be given assuming that the translucent member 50B including the convex portion 52B of the first modification shown in FIG. 10 and the case 30B having the translucent member 50B have the same configuration. Therefore, in addition to the effect obtained by the biological information measuring device having the translucent member 50B and the case portion 30B (see FIG. 10) of the modified example 1, the biological information measuring device of the modified example has a configuration described below. An effect can be obtained.
15 schematically shows the configuration of the biological information detecting device, particularly the translucent member 50B including the convex portion 52B, for convenience of explaining each configuration in an easy-to-understand manner, and the dimensional ratios in the drawing are actual ones. Is different.

  In the direction from the biological information measuring device to the subject (in the drawing, the direction from the light emitting unit 150 and the first and second light receiving units 140 and 141 toward the light transmitting member 50B), the first light receiving of the light transmitting member 50B. When the height at the position or area corresponding to the portion 140 is h1, and the height at the position or area corresponding to the second light receiving portion 141 in the translucent member 50B is h2, h1> h2.

  At this time, the biological information measuring apparatus is configured to calculate a biological information of the subject based on the first detection signal detected by the first light receiving unit 140 (not shown, in the above embodiment, the processing of FIG. 5). Part 200). In this way, it is possible to calculate biological information such as a pulse using the first detection signal from the first light receiving unit 140.

  In the biological information measuring apparatus of this modification, when the distance between the light emitting unit 150 and the first light receiving unit 140 is L1, and the distance between the light emitting unit 150 and the second light receiving unit 141 is L2, L1 <L2 It is. The processing unit (not shown) reduces the body motion noise of the first detection signal detected by the first light receiving unit 140 based on the second detection signal detected by the second light receiving unit 141. A dynamic noise reduction process is performed, and biological information is calculated based on the first detection signal after the body movement noise reduction process.

  In this way, the height at the position or region corresponding to each light receiving unit (first light receiving unit 140, second light receiving unit 141) and each light receiving unit (first light receiving unit 140, second light receiving unit). By providing a difference in at least one of the distances between the light emitting unit 150 and the light emitting unit 150, as described above, the pulse signal is mainly detected in the first light receiving unit 140 and the body motion noise is mainly detected in the second light receiving unit 141. Can be detected. Therefore, the body motion noise reduction process using the second detection signal of the second light receiving unit 141 is performed on the first detection signal of the first light receiving unit 140 or after the body motion noise reduction process. It is possible to obtain accurate biological information from the first detection signal.

(Modification 7)
FIG. 16 is a plan view schematically showing the sensor unit 40D in Modification 7 of the biological information measuring device as seen from the light transmitting member side.
Hereinafter, the sensor unit 40D of the biological information measuring device according to the modified example 7 will be described. In addition, about the same component as the said embodiment, the same number is attached | subjected and the overlapping description is abbreviate | omitted. Although not shown, the sensor unit according to the present modification also includes a translucent member having the structure of any one of the above embodiment and the first and second modifications, and a case unit having the translucent member. Assuming that the contact state between the object and the sensor unit is appropriately and stably maintained and that it is possible to accurately acquire biological information, the arrangement of the sensor elements in this modification will be described below. Etc. will be described.

  The sensor unit 40D of the biological information measuring device of the present modification shown in FIG. 16 includes a first light emitting unit 150 and a second light emitting unit 150A as two light emitting units, and a first light receiving unit 140 and two light receiving units. A second light receiving unit 141 is included. The first light emitting unit 150 and the second light emitting unit 150A are arranged on the mounting surface 160a of the substrate 160D on the same straight line as the second light receiving unit 141 along the X direction. In other words, the second light receiving unit 141 is arranged on a straight line connecting the center of the first light emitting unit 150 and the center of the second light emitting unit 150A, and the first light receiving unit 140 is arranged in the perpendicular direction of the straight line. Deploy. For this reason, the distance L41 from the first light receiving unit 140 to the first light emitting unit 150 is different from the distance L51 from the second light receiving unit 141 to the first light emitting unit 150. Further, the distance L42 from the first light receiving unit 140 to the second light emitting unit 150A is different from the distance L52 from the second light receiving unit 141 to the second light emitting unit 150A. Further, a frame-like wall portion 70D as a light shielding portion is disposed between each light emitting portion 150, 150A and each light receiving portion 140, 141, and light emitted from each light emitting portion 150, 150A is received by each light receiving portion 140. , 141 can be prevented from being directly incident and received.

  That is, since the distances L41 and L42 are different from the distances L51 and L52, similarly to the above, the first light receiving unit 140 and the second light receiving unit emitted from the first light emitting unit 150 and passing through the subject. The length or path of the light path of the light incident on 141 can be surely varied. Accordingly, by arranging the first light emitting unit 150 and the second light emitting unit 150A at the above positions, the first light receiving unit 140 and the second light emitting unit 150 are emitted from the first light emitting unit 150 and pass through the detection site. The length or path of the light path of the light incident on the light receiving portion 141 can be reliably varied. In other words, the first light receiving unit 140 and the second light receiving unit 141 can receive light having different information. Therefore, since the light reception results by the first light receiving unit 140 and the second light receiving unit 141 can be made different from each other, the detection and analysis accuracy of biological information can be reliably improved.

  In the sensor unit 40D in the biological information measuring device of this modification, the wavelength band of light emitted from the first light emitting unit 150 is different from the wavelength band of light emitted from the second light emitting unit 150A. can do. In this way, for example, light in the first wavelength range that is easily reflected by the first substance in the blood vessel of the subject is transmitted from one of the first light emitting unit 150 and the second light emitting unit 150A. The first light emitting unit 150 and the second light emitting unit 150A emit light having a second wavelength range different from the first wavelength range that is easily emitted and reflected by a second material different from the first material. If it is made to inject from the other of them, it can provide as a biological information measuring device which can obtain the detection value corresponding to a plurality (in this case, two) substances.

(Modification 8)
FIG. 17 is a front sectional view schematically showing a sensor unit 40E in Modification 8 of the biological information measuring device.
In the above embodiment, the wall portion 70 (first wall portion 71, second wall portion 72) as a light blocking portion that suppresses light emitted from the light emitting portion 150 from being directly incident on the light receiving portion 140 and received. Is disposed between the light emitting unit 150 and the light receiving unit 140 on the support surface (mounting surface) 160a of the substrate 160 on which the light emitting unit 150 and the light receiving unit 140 are mounted, but is not limited thereto.
Hereinafter, the sensor unit 40E of the biological information measuring device according to Modification 8 will be described. In addition, about the same component as the said embodiment, the same number is attached | subjected and the overlapping description is abbreviate | omitted.

  In FIG. 17, the sensor unit 40E of the present modification has substantially the same configuration as the sensor unit 40 (see FIG. 6) of the above embodiment. In particular, the distance (width dimension) L between the two top portions 52t1 and 52t2 of the convex portion 52 of the translucent member 50 ′ and the case portion 30 (bottom case 36) having the translucent member 50 ′, and the translucent member 50 ′. The shape and dimensional relationship of each part such as the difference Δt between the distance from the second surface 50′b to the first surface 50′a and the distance from the second surface 50′b to the tops 52t1 and 52t2, and the substrate ( The positional relationship between the light emitting unit 150 and the light receiving unit 140 mounted on the (sensor substrate) 160 is the same as that of the sensor unit 40 of the above embodiment shown in FIG. The difference between the sensor unit 40 of the above embodiment and the sensor unit 40E of this modification is that the wall portion 570 serving as a light shielding unit disposed between the light emitting unit 150 and the light receiving unit 140 is not the substrate 160 but the transparent portion. This is a point provided on the optical member 50 '. In the above-described embodiment and modification of the present invention, the translucent member is a part of the case part, and therefore the wall part 570 as the light-shielding part in the sensor part 40E of this modification is provided in the case part 30. It can be said that it is (fixed).

  Specifically, in the sensor unit 40E of the present modified example, the wall 570 has one end fixed to the translucent member 50 ′ and the other end facing the second surface 50′b of the translucent member 50 ′. The light-emitting unit 150 and the light-receiving unit 140 mounted on a support surface (mounting surface) 160a of 160 are disposed at a position where light can be shielded. 17, the other end side extends to a position where the light emitted from the light emitting unit 150 is directly incident on the light receiving unit 140 and is not received, and a gap is formed between the wall 570 and the support surface 160a of the substrate 160. Although the structure which has is shown, it is not restricted to this. For example, the other end side of the wall portion 570 whose one end side is fixed to the translucent member 50 ′ may be in contact with the support surface 160 a of the substrate 160, or the support surface 160 a of the substrate 160 is spotted. It is good also as a structure which forms a recessed part by this and arrange | positions a part of the other end side of the wall part 570 in this recessed part.

  According to the sensor unit 40E of the present modification, the detection unit (sensor unit) including the light emitting unit 150 and the light receiving unit 140 is configured as a general-purpose detection module (sensor module), and is prepared as a unit component. By incorporating the general-purpose module into the case part 30 having the translucent member 50 ′ provided with the wall part 570 as the light shielding part, a biological information measuring apparatus with high measurement accuracy can be configured.

(Modification 9)
FIG. 18 is a front sectional view schematically showing a sensor unit 40F in Modification 9 of the biological information measuring device.
In the above-described modification 8, the configuration in which the wall portion 570 as the light shielding portion is provided on the light transmitting member 50 ′ (case portion 30) side instead of the substrate 160 is described, but the present invention is not limited to this. Like the sensor part 40F shown in FIG. 18, the wall part 70A as a light shielding part is disposed between the light emitting part 150 and the light receiving part 140 of the support surface 160a of the substrate 160, and the case part 30 (bottom case 36) is provided. It is good also as a structure which provides the light-shielding part 570A in the translucent member 50A which has. The light shielding portion 570A disposed on the light transmissive member 50A is disposed immediately above the wall portion 70A and at a site that is a boundary between the optical path of the emitted light emitted from the light emitting section 150 and the optical path of the reflected light from the subject. To do.

  According to this configuration, the wall portion 70A provided on the support surface 160a of the substrate 160 can suppress the light emitted from the light emitting portion 150 from being directly irradiated to the light receiving portion 140 and received, and the light transmitting member. The light shielding unit 570A provided in 50A optically shields the optical path of the light emitted from the light emitting unit 150 to the subject and the light reflected from the subject to the light receiving unit 140, and the light receiving unit 140 receives the subject from the light receiving unit 140. It is possible to suppress noise light that is not reflected light from being incident and received. Therefore, it is possible to provide the sensor unit 40F of the biological information measuring device capable of measuring highly accurate and stable biological information.

  Although the embodiments and the modifications have been described in detail as described above, those skilled in the art can easily understand that many modifications can be made without departing from the novel matters and effects of the present invention. Let's go. Accordingly, all such modifications are intended to be included in the scope of the present invention. For example, a term described at least once together with a different term having a broader meaning or the same meaning in the specification or the drawings can be replaced with the different term in any part of the specification or the drawings. Further, the configuration and operation of the biological information measurement module, the light detection unit, the biological information measurement device, and the like are not limited to those described in this embodiment, and various modifications can be made.

  DESCRIPTION OF SYMBOLS 10 ... Band part, 12 ... Band hole, 14 ... Buckle part, 15 ... Band insertion part, 16 ... Projection part, 30, 30B, 30C ... Case part, 30a, 30Ba, 30Ca ... (Contact object) surface, 32 ... Light emission window part, 34 ... Top case, 35 ... Terminal part, 36 ... Bottom case, 40, 40B, 40C, 40D, 40E, 40F ... Sensor part, 50, 50 ', 50A, 50B, 50C ... Translucent member 50a, 50Ba, 50Ca ... first surface, 50b, 50Bb, 50Cb ... second surface, 52, 52B ... convex portion, 52t1, 52t2 ... top portion, 54 ... groove portion, 56 ... concave portion, 70, 70A, 570 ... light shielding portion , 71... First wall portion as a light shielding portion, 72... Second wall portion as a light shielding portion, 80... Aperture portion, 140 ... Light receiving portion (first light receiving portion), 141. Part, 150 ... departure Part (first light emitting part), 150A ... second light emitting part, 151 ... dome-shaped lens, 155 ... pedestal part, 160, 160A, 160D ... substrate, 160a ... support surface (mounting surface), 169 ... hole part, 170 ... body motion sensor unit, 172 ... acceleration sensor, 180 ... vibration generating unit, 200 ... processing unit, 210 ... signal processing unit, 212 ... body motion noise reduction unit, 220 ... beat information calculating unit, 230 ... notification control unit , 240 ... storage unit, 250 ... communication unit, 252 ... antenna, 260 ... notification unit, 274 ... connection terminal, 400 ... biological information measuring device, 410 ... wrist, 411 ... skin, 420 ... terminal device, 430 ... display unit, 570A: light shielding unit, 1020 ... heart rate monitoring device, 1022 ... sensor, 1026 ... carrier, 1030 ... heart rate monitoring device, 1032 ... insulating material, 1034 ... electrical connection terminal, 1 221, 1223, light emitting elements, 1221 a, 1222 a, upper surface, 1222, light receiving elements.

Claims (10)

A light emitting unit for emitting light to the subject;
A light receiving unit for receiving the light passing through the subject;
A translucent member that transmits the light and contacts the subject;
The translucent member, and at least a part of the case contacting the subject, and
When the second surface of the translucent member facing the first surface of the translucent member in contact with the subject in a cross-sectional view from a direction orthogonal to the direction from the light emitting unit toward the translucent member is used as a reference Furthermore, the distance from the said 2nd surface to the said 1st surface is shorter than the distance from the said 2nd surface to the surface which contacts the said test object of the said case part, The biological information measuring device characterized by the above-mentioned. The biological information measuring device according to claim 1,
The case portion has a protruding portion protruding along a direction from the light emitting portion toward the light transmissive member,
The biological information measuring device, wherein the translucent member is provided on the protruding portion. The biological information measuring device according to claim 1 or 2,
In the cross-sectional view, the first part of the case portion that is in the vicinity of the translucent member and contacts the subject, and the second part that is located on the opposite side of the first part with the translucent member interposed therebetween. Where L is L = 4.5 mm, the distance from the second surface to the first surface, and the second surface is in contact with the subject of the case portion The biological information measuring device, wherein the difference Δh from the distance to the surface to be measured is 0.05 mm ≦ Δh ≦ 0.3 mm. The biological information measuring device according to claim 1 or 2,
In the cross-sectional view, the first part of the case portion that is in the vicinity of the translucent member and contacts the subject, and the second part that is located on the opposite side of the first part with the translucent member interposed therebetween. Where L is 4.0 mm ≦ L ≦ 5.0 mm, the distance from the second surface to the first surface, and the second surface to the case portion. A biological information measuring apparatus, wherein a difference Δh from a distance to a surface in contact with a subject is 0.15 mm ≦ Δh ≦ 0.17 mm. The biological information measuring device according to claim 1 or 2,
In the cross-sectional view, the first part of the case portion that is in the vicinity of the translucent member and contacts the subject, and the second part that is located on the opposite side of the first part with the translucent member interposed therebetween. When the distance from the region is L, the difference Δh between the distance from the second surface to the first surface and the distance from the second surface to the surface of the case portion that contacts the subject is: The biological information measuring device represented by Formula (1).

In the biological information measuring device according to any one of claims 1 to 5,
A biological information measuring device, comprising: a light-shielding unit that is disposed between the light-emitting unit and the light-receiving unit and shields the light that is directly incident on the light-receiving unit from the light-emitting unit. The biological information measuring device according to claim 6,
The biological information measuring device, wherein the light shielding part is provided in the case part. In the biological information measuring device according to any one of claims 1 to 7,
A second light emitting unit for emitting light to the subject;
The light emitting unit and the second light emitting unit are arranged at positions where at least one of a distance from the light transmitting member and a distance from the light receiving unit of each light emission position is different. Biological information measuring device. The biological information measuring device according to claim 8,
The biological information measuring device, wherein wavelength bands of light emitted from the light emitting unit and the second light emitting unit are different from each other. The biological information measuring device according to any one of claims 1 to 9,
The biological information measuring device, wherein the case portion has a light shielding property.

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