JP2019136441A - Biological information detection sensor and biological information measurement device - Google Patents

Abstract

To provide a biological information detection sensor and a biological information measurement device that enable biological information detection accuracy thereof to be improved.SOLUTION: The biological information detection sensor detecting biological information of a living body comprises a board and a sensor unit provided on the board. The sensor unit comprises: a light emitting unit that emits light with which the living body is irradiated; a light receiving unit that receives light reflected by the living body; a light shielding unit disposed between the light emitting unit and the light receiving unit; and a translucent sealing unit that contacts the living body and seals the light emitting unit, the light receiving unit, and the light shielding unit to the board.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a biological information detection sensor and a biological information measurement device.

Conventionally, a biological information measuring device that detects and measures biological information of a subject is known. As such a biological information measuring device, a pulse wave sensor that measures a subject's pulse wave is known (see, for example, Patent Document 1).
The pulse wave sensor described in Patent Document 1 includes a main body unit and a belt that is attached to both ends of the main body unit and is wound around a wrist in a living body. The main body unit is a light that acquires pulse wave data. It has a sensor part.
The optical sensor unit includes a case, a light-shielding wall, a light-transmitting plate, a light-emitting unit that irradiates light to the living body, and a light-receiving unit that detects light transmitted through the living body. Are provided on the same side. The case is a bowl-shaped member that houses the light emitting unit and the light receiving unit, and the translucent plate is provided so as to close the opening surface of the case and be flush with the surface of the main body unit that faces the living body. .

JP2013-63205A

  However, in the optical sensor unit described in Patent Document 1, in addition to the thickness of the light shielding wall, the thickness of the light transmitting plate is the thickness of the entire optical sensor unit. If the thickness of the optical sensor is large, the distance from the light emitting unit to the living body and the distance from the living body to the light receiving unit become long, so light attenuation is likely to occur, and the amount of light received at the light receiving unit is likely to decrease. Therefore, there is a problem that the detection accuracy is lowered.

  SUMMARY OF THE INVENTION An object of the present invention is to solve at least a part of the above-described problems, and to provide a biological information detection sensor and a biological information measuring device capable of improving the detection accuracy of biological information. I will.

  The biological information detection sensor according to the first aspect of the present invention is a biological information detection sensor that detects biological information of a biological body, and includes a substrate and a sensor unit provided on the substrate, wherein the sensor unit includes: A light emitting unit that emits light emitted to the living body; a light receiving unit that receives light reflected by the living body; a light shielding unit disposed between the light emitting unit and the light receiving unit; And a light-transmitting sealing portion that seals the light-emitting portion, the light-receiving portion, and the light-shielding portion to the substrate.

In addition, the term “sealing” refers to enclosing an object to be sealed with a sealing material. However, in this specification, the present invention is not limited to completely enclosing an object to be sealed. This includes cases that protrude outward. For example, in the above configuration, as long as the light emitting unit and the light receiving unit are wrapped in the sealing unit, the end of the light shielding unit on the side opposite to the substrate may slightly protrude from the sealing unit.
According to such a configuration, the light emitting unit, the light receiving unit, and the light shielding unit are sealed on the substrate by the sealing unit that comes into contact with the living body. According to this, while protecting the light emitting unit, the light receiving unit, and the light shielding unit, the distance between the light emitting unit and the light receiving unit and the contact surface in contact with the living body in the sealing unit can be shortened. The distance from the living body can be shortened. For this reason, since attenuation of the light irradiated to the living body from the light emitting unit and attenuation of light incident on the light receiving unit from the living body can be suppressed, a decrease in the amount of received light at the light receiving unit can be suppressed. Therefore, the detection accuracy of biological information can be increased.
Further, the light shielding part is sealed by the sealing part together with the light emitting part and the light receiving part. According to this, it is not necessary to separately provide the light shielding part outside the sealing part. Therefore, it is possible to reduce the thickness of the biological information detection sensor in addition to shortening the distance between the light emitting unit and the light receiving unit and the contact surface.

Here, the shorter the dimension between the light emitting part and the light receiving part, the shorter the optical path length for the light emitted from the light emitting part to reach the light receiving part via the living body, and thus the attenuation of the light is less likely to occur. However, when the light emitting unit and the light receiving unit are individually sealed, the dimension between the light emitting unit and the light receiving unit tends to be long. If a light shielding part is provided between the light emitting part and the light receiving part, the dimension between the light emitting part and the light receiving part is further increased.
On the other hand, the light emitting part, the light receiving part, and the light shielding part are sealed by one sealing part. According to this, the dimension between the light emitting part and the light receiving part can be shortened by collectively sealing the light emitting part, the light receiving part and the light shielding part arranged at positions close to each other. Therefore, the attenuation of the light can be made difficult to occur, and the detection accuracy of biological information can be reliably improved.

In the first aspect, it is preferable that either the light emitting unit or the light receiving unit is a bare chip.
Here, the bare chip indicates an element that is not packaged. For example, as a bare chip constituting the light emitting unit, an unpackaged LED (Light Emitting Diode) element and an unpackaged organic EL (Electro-Luminescence) element can be cited. Further, for example, as a bare chip constituting the light receiving unit, a PD (Photodiode) element that is not packaged can be cited. And either of the light emitting part and the light receiving part is a bare chip, when only the light emitting part is a bare chip, when only the light receiving part is a bare chip, and when each of the light emitting part and the light receiving part is a bare chip. including.
According to such a configuration, since the bare chip has a smaller thickness dimension (an upright dimension from the substrate when the chip is mounted on the substrate) than the packaged chip, the thickness dimension of the sealing portion can be reduced. . Therefore, the biological information detection sensor can be further reduced in thickness.

In the first aspect, the light emitting unit includes a first light emitting unit and a second light emitting unit, and the light receiving unit is provided between the first light emitting unit and the second light emitting unit, and It is preferable that the unit is provided between the first light emitting unit and the light receiving unit and between the second light emitting unit and the light receiving unit.
According to such a configuration, the detection accuracy of the biological information can be increased by using the light emitting unit at a position suitable for the detection of the biological information out of the first light emitting unit and the second light emitting unit. On the other hand, by using each of the first light emitting unit and the second light emitting unit, the amount of light received by the light receiving unit can be increased, so that the detection accuracy of biological information can be increased even in this case.
Further, the light that directly goes from the first light emitting part to the light receiving part and the light that goes directly from the second light emitting part to the light receiving part can be blocked by the light shielding part. Therefore, since it can suppress that the light which does not pass through a biological body will inject into a light-receiving part, the detection accuracy of biological information can be raised more.

In the first aspect, it is preferable that the light shielding portion surrounds the light receiving portion when viewed from a direction perpendicular to the substrate.
Here, since the light emitting part and the light receiving part are sealed by the sealing part, a part of the light emitted from the light emitting part travels in the sealing part by repeating internal reflection, and the light emitting part in the light receiving part. There is a possibility that the light is incident on the light receiving unit from a side different from the side.
On the other hand, according to the above configuration, not only the light emitted from the light emitting unit and traveling through the sealing unit without passing through the living body and traveling toward the light receiving unit can be blocked by the light shielding unit, but also incident on the sealing unit. The disturbance light which goes to a light-receiving part can also be shielded. Therefore, the detection accuracy of biological information can be further increased.

In the first aspect, the position of the front end portion of the light shielding portion on the projecting direction side from the substrate substantially coincides with the position of the surface where the light emitted from the light emitting portion is emitted to the outside in the sealing portion. It is preferable.
In addition, the surface where the light emitted from the light emitting unit is emitted to the outside in the sealing unit is a contact surface that can come into contact with the living body, in other words, between the light emitting unit and the light receiving unit and the living body in the sealing unit. It is a surface where the light emitted from the light emitting unit is emitted toward the living body and the light reflected by the living body is incident. Hereinafter, this surface is referred to as an incident / exit surface in the sealing portion.
Here, when the light emitting unit emits light at a predetermined emission angle, a part of the light emitted from the light emitting unit may be internally reflected by the incident / exit surface. In such a case, if the tip portion of the light shielding portion is located on the substrate side with respect to the incident / exit surface, there is a possibility that the part of the light passes over the light shielding portion and enters the light receiving portion.
On the other hand, since the position of the tip portion in the light shielding portion substantially coincides with the position of the incident / exit surface, the light reflected on the inner surface by the incident / exit surface can be shielded by the light shielding portion, and reflected by the inner surface. The incident light can be prevented from entering the light receiving unit. Accordingly, it is possible to suppress a decrease in detection accuracy of biological information.

In the first aspect, it is preferable that a surface of the sealing portion from which light emitted from the light emitting portion is emitted to the outside is a curved surface.
According to such a configuration, the lens function can be imparted to the sealing portion by forming the surface of the sealing portion into a lens shape. For this reason, for example, the light emitted from the light emitting part can be emitted so as to diffuse or converge on the living body by making the surface of the sealing part a convex curved surface or a concave curved surface. Further, for example, by making the surface of the sealing portion a concave curved surface, the light reflected by the living body can be condensed on the light receiving portion. Thus, according to the use of the biological information detection sensor, the light emitted from the light emitting unit can be effectively irradiated on the living body, and the light incident from the living body can be efficiently incident on the light receiving unit. Therefore, the detection accuracy of biological information can be further increased.

In the first aspect, it is preferable that a surface of the sealing portion from which the light emitted from the light emitting portion is emitted to the outside is a flat surface.
Here, the thickness dimension of the sealing portion also depends on the cross-sectional shape of the surface in the sealing portion. For this reason, by making the said surface in a sealing part into a plane, the thickness dimension of a sealing part can be made small and by extension the thickness dimension of a biological information detection sensor can be made small. Therefore, the biological information detection sensor can be further reduced in thickness.

A biological information measuring device according to a second aspect of the present invention includes the biological information detection sensor.
According to such a configuration, it is possible to achieve the same effect as the biological information detection sensor according to the first aspect, thereby improving the measurement accuracy of the biological information and reducing the thickness of the biological information measuring device. Can be achieved.

The front view which shows the biological information measuring device which concerns on 1st Embodiment of this invention. The figure which shows the back part of the biological information measuring device in the said 1st Embodiment. The figure which shows the internal structure of the biological information measuring device in the said 1st Embodiment. The perspective view which shows the rear case and biological information detection sensor in the said 1st Embodiment. The perspective view which looked at the biological information detection sensor in the first embodiment from the light emitting side. The perspective view which shows arrangement | positioning of the biometric information detection sensor with respect to the rear case in the said 1st Embodiment. The figure which looked at the living body information detection sensor in the 1st embodiment from the side. The perspective view which shows the rear case where the biological information detection sensor in the said 1st Embodiment is arrange | positioned. The figure which shows the internal structure of the biometric information measuring apparatus which concerns on 2nd Embodiment of this invention. The side view showing the living body information detection sensor with which the living body information measuring device concerning a 3rd embodiment of the present invention is provided.

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described based on the drawings.
[Schematic configuration of biological information measuring apparatus]
FIG. 1 is a front view showing a biological information measuring apparatus 1A according to the present embodiment.
A biological information measuring apparatus 1A according to the present embodiment (hereinafter may be abbreviated as a measuring apparatus 1A) is a wearable device that is used by being worn on a user's body, and measures the user's biological information. Specifically, the measuring apparatus 1A is used by being mounted on a wearing site such as a user's wrist, detects a user's pulse wave, which is one of biological information, and a pulse rate, which is another biological information. Measure. And the measuring apparatus 1A has one of the features in the structure of the biological information detection sensor 5A described later.
As shown in FIG. 1, the measuring apparatus 1A includes a housing 2 and bands BN1 and BN2.

  In the following description, the direction from the front part 21 to the rear part 22 of the housing 2 is defined as + Z direction, and two directions orthogonal to the + Z direction and orthogonal to each other are defined as + X direction and + Y direction. Among these, the + X direction is the 9 o'clock direction when viewed from the position facing the front portion 21, and the + Y direction is the 12 o'clock direction. Although not shown, the direction opposite to the + Z direction is defined as the −Z direction. The same applies to the −X direction and the −Y direction. The + Z direction is also a direction in which the light emitting unit 53 constituting the sensor unit 52A of the biological information detection sensor 5A described later mainly emits light, and the −Z direction is a light receiving unit 54 of light reflected by the living body. It is also the direction that mainly enters the light.

  The band BN1 extends in the + Y direction from the end portion of the housing 2 on the + Y direction side, and the band BN2 extends from the end portion of the housing 2 on the −Y direction side in the −Y direction. When the bands BN1 and BN2 are connected to each other by a middle ring (not shown), the housing 2 is attached to the attachment site. The bands BN1 and BN2 may be formed integrally with the housing 2.

The housing 2 has a front case 2A located on the −Z direction side and a rear case 2B (see FIG. 2) located on the + Z direction side, and these are combined. The housing 2 includes a front part 21, a back part 22 (see FIG. 2), and a side part 23.
The front portion 21 is a portion located on the −Z direction side in the housing 2 and is configured by the front case 2A. The front part 21 is a part that can be visually recognized by a user wearing the measuring apparatus 1A. A display part DP is provided in the approximate center of the front part 21, and the display part DP is covered with a cover 211.
A pair of buttons BT constituting the operation unit is provided in a portion on the −X direction side in the side surface part 23.

FIG. 2 is a diagram showing the back surface portion 22 of the measuring apparatus 1A.
The back surface portion 22 is a portion located on the + Z direction side in the housing 2 and is configured by the rear case 2B. The back surface portion 22 is a contact portion that contacts the user's body in the housing 2 when the measuring apparatus 1A is attached to the user.
As shown in FIG. 2, the back surface portion 22 is formed in a curved shape in which the center side bulges toward the + Z direction side as compared with the outer edge side. A substantially rectangular opening 221 is formed at the center of the back surface portion 22 to expose the sensor portion 52A of the biological information detection sensor 5A accommodated in the housing 2 to the outside. The biological information detection sensor 5A will be described in detail later.

[Internal structure of housing]
FIG. 3 is a diagram illustrating an internal configuration of the measurement apparatus 1A. Specifically, the cross section is parallel to the YZ plane and passes through the center of the measurement apparatus 1A as viewed from the −X direction side.
In addition to the housing 2 and the display unit DP, the measuring device 1A includes a processing substrate 3, a battery 4, a biological information detection sensor 5A, and a connection member 6 that are accommodated in the housing 2, as shown in FIG. Hereinafter, the biological information detection sensor may be simply abbreviated as “sensor”.
The battery 4 supplies power for operating the measuring apparatus 1A. In the present embodiment, the battery 4 is a secondary battery that is charged by electric power supplied from outside under the control of the processing substrate 3, but is not limited thereto, and may be a primary battery.

[Configuration of treated substrate]
The processing board 3 is a control board that controls the entire measuring apparatus 1A, and has a configuration in which a plurality of circuit elements are mounted on a rigid board, although detailed illustration is omitted. As such a circuit element, the processing substrate 3 includes an acceleration sensor, a wireless communication circuit, a display control circuit, a storage circuit, and a control circuit.

The acceleration sensor detects acceleration acting on the measuring apparatus 1A, and outputs a signal indicating a change in the detected acceleration to the control circuit as a body motion signal indicating the body motion of the user. The body motion signal is also used to remove body motion noise that is performed when the control circuit analyzes the pulse wave signal input from the sensor 5A and determines the pulse rate.
Under the control of the control circuit, the wireless communication circuit transmits biological information and body motion information based on the detection results of the sensor 5A and the acceleration sensor to the external device, and outputs information received from the external device to the control circuit.
The display control circuit displays predetermined information on the display unit DP under the control of the control circuit. For example, the display control circuit displays the pulse rate analyzed by the control circuit on the display unit DP.

The storage circuit is configured by a nonvolatile memory such as a flash memory, and stores a program and data necessary for the operation of the measuring apparatus 1A. In addition, the storage circuit stores the detection result by the sensor 5A and the acceleration sensor and the analysis result by the control circuit.
The control circuit is configured by an arithmetic processing circuit such as a CPU (Central Processing Unit), and controls the entire measuring apparatus 1A autonomously or in response to a user input operation to an operation unit such as the button BT. For example, the control circuit determines the user's pulse rate based on the pulse wave signal input from the sensor 5A and the body motion signal input from the acceleration sensor. In addition to storing the determined pulse rate in the storage circuit, the control circuit causes the display unit DP to display the pulse rate as necessary, or transmits the pulse rate to an external device using a wireless communication circuit.

[Configuration of biological information detection sensor]
FIG. 4 is a perspective view of the rear case 2B and the sensor 5A viewed from the + Z direction side. FIG. 5 is a perspective view of the sensor 5A viewed from the + Z direction side. 4 and 5, in order to make the arrangement of the light emitting unit 53, the light receiving unit 54, and the light shielding unit 55 in the sensor unit 52A easy to understand, the sealing unit 56 constituting the sensor unit 52A is not shown. Yes.
The sensor 5A is a biological information detection sensor used in a biological information measuring device that measures biological information exemplified by the measuring device 1A. The sensor 5A irradiates light to a living body (for example, a user's body) and is reflected by the living body. The signal indicating the change in the received light amount of the reflected light is output as a pulse wave signal indicating the pulse wave of the living body. As shown in FIGS. 4 and 5, the sensor 5 </ b> A includes a substrate 51, a sensor unit 52 </ b> A, a connector 57, and a plurality of elements 58.
Among these, the plurality of elements 58 are circuit elements such as resistors, transistors, and capacitors, and are mounted on the mounting surface 51 </ b> A of the substrate 51.

[Substrate structure]
The substrate 51 is a substrate on which a sensor portion 52A, a connector 57, and a plurality of elements 58 are mounted and supported on a mounting surface 51A that is a surface on the + Z direction side. In the present embodiment, the substrate 51 is a rectangular rigid substrate having a long + Y direction and a short + X direction.
The board | substrate 51 has the recessed part 511 dented in the + Y direction side in the edge part of the -Y direction side. The recess 511 forms a gap GP (see FIG. 3) through which the connection member 6 that connects the sensor 5A and the processing substrate 3 is inserted with the recess 225 described later. In the present embodiment, the connection member 6 is configured by an FPC (flexible printed circuit board), but may be a conductive member such as a cable or a harness.
In such a substrate 51, no circuit element is disposed on the surface 51B opposite to the mounting surface 51A. However, a circuit element having a predetermined function may be disposed on the surface 51B.

[Configuration of sensor unit]
The sensor unit 52A is located approximately at the center of the mounting surface 51A, irradiates light to the living body, and receives light reflected by the living body, and outputs a signal corresponding to the amount of received light. The sensor unit 52A includes a light emitting unit 53 (53A, 53B), a light receiving unit 54, a light shielding unit 55, and a sealing unit 56 (see FIG. 6).

[Configuration of light emitting unit]
The light emitting unit 53 emits light (detection light, for example, green light) applied to the living body. Two light emitting units 53 are provided on the straight line passing through the center of the back surface part 22 along the + Y direction so as to sandwich the light receiving unit 54 with a predetermined interval therebetween. In other words, the light emitting unit 53 includes a light emitting unit 53A located on the + Y direction side and a light emitting unit 53B located on the −Y direction side. One of the light emitting units 53A and 53B is a first light emitting unit, and the other corresponds to a second light emitting unit.

In the present embodiment, each of the light emitting parts 53A and 53B includes a light emitting element (not shown) such as an LED (Light Emitting Diode), a covering part 531 covering the light emitting element, and a covering part covering the light emitting element. And a lens 532 provided at 531. That is, the light emitting units 53A and 53B are packaged LED chips.
Although not shown in detail in the covering portion 531, as viewed from the position facing the light emitting surface of the light emitting element, the reflective portion surrounding the four sides (± X direction side and ± Y direction side) of the light emitting element, the light emitting element, and the reflection And a sealing resin filled between the portions. Of the light emitted from the light emitting element, the light emitted to the ± X direction side and the ± Y direction side is reflected to the + Z direction side by the reflecting portion and is incident on the lens 532. Note that light emitted from the light emitting element toward the + Z direction is also incident on the lens 532. Thus, the light emitted from the light emitting element and incident on the lens 532 is condensed by the lens 532 and emitted.
The light emitting units 53A and 53B can be switched on and off individually. For this reason, at the time of detecting the pulse wave, at least one of the light emitting units 53A and 53B is turned on, but the light emitting units 53A and 53B are not necessarily turned on at the same time.

[Configuration of light receiving unit]
The light receiving unit 54 receives the reflected light irradiated from the light emitting unit 53 and reflected by the living body, and outputs a signal indicating a change in the amount of received light of the reflected light as a pulse wave signal indicating a pulse wave waveform. The light receiving unit 54 is provided at the center between the two light emitting units 53A and 53B in the + Y direction connecting the two light emitting units 53A and 53B. That is, the dimension between the center of the light emitting part 53A and the center of the light receiving part 54 is the same as the dimension between the center of the light emitting part 53B and the center of the light receiving part 54. Located in the center.
Although not illustrated in detail, the light receiving unit 54 includes a light receiving element that is a PD (Photodiode), a covering unit that covers the light receiving element, and an angle limiting filter. That is, the light receiving unit 54 is a packaged PD chip.
The angle limiting filter transmits light whose incident angle, which is the angle of incident light with respect to the normal of the filter layer constituting the angle limiting filter, is less than a predetermined value, and transmits light whose incident angle is greater than or equal to a predetermined value. It is a filter to suppress. By providing such an angle limiting filter, disturbance light as noise is prevented from entering the light receiving unit 54. In the present embodiment, the predetermined value is set to 30 °.
On the other hand, the light receiving unit 54 may include a wavelength limiting filter that transmits light emitted from the light emitting unit 53 and limits the wavelength of light received by the light receiving unit 54.

[Configuration of light shielding part]
The light shielding unit 55 shields light emitted from the light emitting unit 53 and traveling toward the light receiving unit 54 without passing through a living body. The light shielding unit 55 is disposed between the light emitting unit 53 (53A, 53B) and the light receiving unit. Specifically, the light shielding unit 55 includes a first shielding unit 551, a second shielding unit 552, a third shielding unit 553, and a fourth shielding unit 554, and is viewed from a direction perpendicular to the substrate 51 (+ Z direction). Thus, each of the shielding portions 551 to 554 is formed in a rectangular frame shape surrounding the light receiving portion 54.
The first shielding part 551 is located on the + Y direction side with respect to the light receiving part 54, and is located between the light emitting part 53 </ b> A and the light receiving part 54. In other words, the first shielding part 551 is located on the light emitting part 53A side with respect to the light receiving part 54 and on the opposite side to the light emitting part 53B side.
The second shielding part 552 is located on the −Y direction side with respect to the light receiving part 54, and is located between the light emitting part 53 </ b> B and the light receiving part 54. In other words, the second shielding part 552 is located on the light emitting part 53B side with respect to the light receiving part 54 and on the opposite side to the light emitting part 53A side.
The third shielding portion 553 is located on the + X direction side with respect to the light receiving portion 54, and the fourth shielding portion 554 is located on the −X direction side with respect to the light receiving portion 54.

  Further, the light shielding part 55 includes a bent part 555 connected to the third shielding part 553 and a bent part 556 connected to the fourth shielding part 554. These bent portions 555 and 556 are flat mounting portions along the XY plane, and the light shielding portion 55 is attached to the mounting surface 51A by attaching the surface on the −Z direction side to the mounting surface 51A with solder or the like.

[Configuration of sealing part]
FIG. 6 is a perspective view showing the arrangement of the sensor 5A with respect to the rear case 2B, in other words, an exploded perspective view showing the rear case 2B and the sensor 5A. FIG. 7 is a view of the sensor 5A as viewed from the side (−X direction side).
6 and 7, the sealing unit 56 seals the light emitting unit 53, the light receiving unit 54, and the light shielding unit 55 on the mounting surface 51A of the substrate 51, and the light emitting unit 53, the light receiving unit 54, and the light shielding unit. The part 55 is protected. The sealing portion 56 is exposed to the outside of the housing 2 through the opening 221 formed in the rear case 2B when the sensor 5A is attached to the rear case 2B.
Such a sealing portion 56 is formed of a light-transmitting sealing resin that transmits light emitted from the light emitting portion 53 and light incident on the light receiving portion 54. For this reason, the light emitted from the light emitting portion 53 is emitted to the outside of the housing 2 through the sealing portion 56, and the light received by the light receiving portion 54 is received through the sealing portion 56. 54 is incident.
Note that the term “sealing” does not necessarily mean that all of the objects to be sealed are encapsulated in the sealing portion 56. For example, if the light-emitting part 53 and the light-receiving part 54 which are sealing objects encapsulate the sealing part 56 in the sealing part 56, a part of the light-shielding part 55 which is also the sealing object will be the sealing part 56. It may protrude slightly outside.

Such a sealing portion 56 is a surface on the + Z direction side and has a contact surface 561 that can come into contact with the living body when the measuring apparatus 1A is attached to the living body. The contact surface 561 is also an exit surface from which light emitted from the light emitting unit 53 is mainly emitted out of the sealing unit 56, and light incident on the light receiving unit 54 is mainly incident from the outside (living body). It is also an incident surface. That is, the contact surface 561 is a light incident / exit surface with respect to the sealing portion 56.
As shown in FIG. 7, such a contact surface 561 is formed in a convex curved shape in which the central portion in the + X direction and the + Y direction swells in the + Z direction from the outer edge side. The shape of the contact surface 561 is a shape intended to collect the light emitted from the light emitting unit 53 and irradiate the living body.

Here, the position of the front end portion in the + Z direction, which is the projecting direction from the mounting surface 51A of the light shielding portion 55, is only located further on the + Z direction side than the end portion on the + Z direction side of the light emitting portion 53 (53A, 53B). The position is substantially the same as the contact surface 561. For example, as shown in FIG. 7, the position of the tip end portion 5511 in the + Z direction of the first shielding portion 551 is not only located further on the + Z direction side than the end portion on the + Z direction side of the light emitting portion 53A, but also on the contact surface 561. And approximately the same position. In addition, the position of the tip end portion 5521 in the + Z direction in the second shielding portion 552 is not only located further on the + Z direction side than the end portion on the + Z direction side in the light emitting portion 53B, but is substantially the same position as the contact surface 561. Although illustration is omitted, the positions of the tip portions on the + Z direction side in the third shielding portion 553 and the fourth shielding portion 554 are also substantially the same as the contact surface 561.
This is because the light emitted from the light emitting portions 53A and 53B is transmitted at the interface when the position of the front end portion (for example, the front end portions 5511 and 5521) of the light shielding portion 55 is located on the −Z direction side from the contact surface 561. This is because there is a possibility that the light is internally reflected by a certain contact surface 561, and enters the light receiving unit 54 over the light shielding unit 55. In this way, the position of the tip of the light shielding part 55 is set at substantially the same position as the contact surface 561 so that the light reflected from the inner surface is also shielded. Note that, as described above, it is assumed that the light shielding portion 55 is sealed by the sealing portion 56 even when the tip portion of the light shielding portion 55 protrudes outside the sealing portion 56 (contact surface 561).
As described above, in order to match the position of the contact surface 561 with the position of the tip of the light shielding portion 55, a method of forming the sealing portion 56 using a mold or the like so that these positions substantially coincide with each other. It is possible to employ a method of cutting the sealed portion 56.

[Connector configuration]
As shown in FIGS. 5 to 7, the connector 57 is a circuit element that is provided at a portion of the mounting surface 51 </ b> A on the −Y direction side with respect to the sensor portion 52 </ b> A and functions as a connection portion connected to the connection member 6. . The connector 57 outputs the pulse wave signal output from the light receiving unit 54 to the processing substrate 3 via the connection member 6.
In the present embodiment, the circuit element that processes the pulse wave signal is provided on the processing substrate 3, but an AFE (Analog Front End) that processes the pulse wave signal may be provided on the substrate 51. Such AFE performs processing such as amplification, noise removal, and A / D conversion on the pulse wave signal. That is, the AFE includes a primary amplification unit, a filter unit, a secondary amplification unit, an A / D conversion unit, and a communication unit. When such an AFE is provided on the substrate 51, the connector 57 outputs a pulse wave signal processed by the AFE to the processing substrate 3 via the connection member 6. The AFE can be configured at the arrangement position of the plurality of elements 58 described above.

[Rear case configuration]
FIG. 8 is a perspective view showing the configuration of the rear case 2B in which the sensor 5A is arranged. In other words, FIG. 8 is a perspective view of the rear case 2B as viewed from the side opposite to the light emitting side (−Z direction side).
As described above, the rear case 2B constitutes the back portion 22 of the housing 2 that houses the processing substrate 3, the battery 4, and the sensor 5A. As shown in FIG. 8, the rear case 2B has a surface 2B1 on the −Z direction side (surface 2B1 that is the inner surface of the back surface portion 22), with the light emitting side surface facing the + Z direction side. It has the arrangement | positioning part 222 by which the sensor 5A is arrange | positioned from the Z direction side.

The arrangement portion 222 has a rectangular shape corresponding to the substrate 51 of the sensor 5A when viewed from the −Z direction side, and is formed in a concave shape that is recessed toward the + Z direction side. In this arrangement portion 222, a bottom portion 222A that is a portion on the + Z direction side is in contact with the mounting surface 51A of the substrate 51 and supports the sensor 5A.
The opening 221 that exposes the sensor 52A to the outside of the housing 2 is formed in the center of the bottom 222A, and the recesses 223 and 224 that are further recessed in the + Z direction are formed on the ± Y direction side with respect to the opening 221. ing.
The recess 223 located on the + Y direction side is a recess for avoiding the plurality of elements 58 mounted on the substrate 51. The recess 224 located on the −Y direction side is a recess for avoiding the connector 57 mounted on the substrate 51. These recesses 223 and 224 correspond to first recesses that avoid circuit elements mounted on the mounting surface 51A.

  In addition, the arrangement portion 222 has a recess 225 that communicates with the recess 224 and is recessed toward the −Y direction at the end on the −Y direction side. The recess 225 is a recess through which the connection member 6 connected to the connector 57 is inserted in the −Z direction side. More specifically, the connection member 6 having one end connected to the connector 57 located on the mounting surface 51 </ b> A that is the surface on the + Z direction side of the substrate 51 has a gap GP formed by the recess 225 and the recess 511 of the substrate 51. It is inserted and connected to the processing substrate 3 positioned on the −Z direction side with respect to the substrate 51. As a result, the pulse wave signal output from the sensor 5 </ b> A is output to the processing substrate 3 through the connection member 6. Such a recess 225 corresponds to the second recess that avoids the connecting member 6 connected to the connector 57 together with the recess 511.

[Effect of the first embodiment]
According to the biological information measuring apparatus 1A according to the present embodiment described above, the following effects can be obtained.
A biological information detection sensor 5A used in the measurement apparatus 1A includes a substrate 51 and a sensor unit 52A. The sensor unit 52 </ b> A contacts the light emitting unit 53, the light receiving unit 54, and the light shielding unit 55, and the user's body, and is a translucent seal that seals the light emitting unit 53, the light receiving unit 54, and the light shielding unit 55 to the substrate 51. Part 56.
According to this, the distance between the light emitting part 53 and the light receiving part 54 and the contact surface 561 of the sealing part 56 can be shortened while protecting the light emitting part 53, the light receiving part 54 and the light shielding part 55 by the sealing part 56. As a result, the distance between the light emitting unit 53 and the light receiving unit 54 and the living body can be shortened. For this reason, since attenuation of the light irradiated to the living body from the light emitting unit 53 and attenuation of light incident on the light receiving unit 54 from the living body can be suppressed, a decrease in the amount of received light at the light receiving unit 54 can be suppressed. Therefore, the detection accuracy of biological information can be increased.
Further, the light shielding portion 55 is sealed by the sealing portion 56 together with the light emitting portion 53 and the light receiving portion 54. According to this, it is not necessary to separately provide the light shielding part 55 outside the sealing part 56. Therefore, it is possible to reduce the thickness of the biological information detection sensor 5A in addition to shortening the distances between the light emitting unit 53 and the light receiving unit 54 and the contact surface 561.

In general, the shorter the dimension between the light emitting unit and the light receiving unit, the shorter the optical path length for the light emitted from the light emitting unit to reach the light receiving unit through the living body, and thus the attenuation of the light is less likely to occur. However, if the light emitting unit and the light receiving unit are individually sealed, they must be separated from each other, and the dimension between the light emitting unit and the light receiving unit tends to be long. And when providing a light-shielding part between a light emission part and a light-receiving part, the dimension between a light-emitting part and a light-receiving part tends to become still longer.
On the other hand, the light emitting unit 53, the light receiving unit 54, and the light shielding unit 55 are sealed by one sealing unit 56. According to this, the dimension between the light emitting part 53 and the light receiving part 54 can be shortened by sealing together the light emitting part 53, the light receiving part 54, and the light shielding part 55 that are arranged close to each other. Therefore, the attenuation of the light can be made difficult to occur, and the detection accuracy of biological information can be reliably improved.

  The light emitting unit 53 includes light emitting units 53A and 53B as a first light emitting unit and a second light emitting unit, respectively. The first shielding part 551 of the light shielding part 55 is provided between the light emitting part 53A and the light receiving part 54, and the second shielding part 552 is provided between the light emitting part 53B and the light receiving part 54. According to this, the light-shielding part 55 can shield the light which goes directly from the light emitting part 53A to the light receiving part 54 and the light which goes directly from the light emitting part 53B to the light receiving part 54. Therefore, it can suppress that the light which does not pass through a biological body injects into the light-receiving part 54, and can improve the detection accuracy of biological information more.

Here, since the light emitting portions 53A and 53B and the light receiving portion 54 are sealed by the sealing portion 56, for example, a part of the light emitted from the light emitting portion 53A repeats internal reflection and is within the sealing portion 56. The light receiving unit 54 may enter the light receiving unit 54 from the side opposite to the light emitting unit 53A. The same applies to part of the light emitted from the light emitting unit 53B.
On the other hand, the light shielding unit 55 includes a first shielding unit 551 provided on the light emitting unit 53A side with respect to the light receiving unit 54, and a second shielding unit 552 provided on the light emitting unit 53B side with respect to the light receiving unit 54. The third shielding portion 553 and the fourth shielding portion 554 are formed in a frame shape surrounding the light receiving portion 54 when viewed from the + Z direction side which is a direction perpendicular to the substrate 51. According to this, the light emitted from the light emitting unit 53, travels through the sealing portion 56, and enters the light receiving unit 54, that is, the light emitted from the light emitting unit 53 without passing through the user's body. The light directed to 54 can be shielded not only by the light-shielding portion 55, but also disturbing light entering the sealing portion 56 and traveling toward the light-receiving portion 54 can be shielded. Therefore, the detection accuracy of biological information can be further increased.

  At the position of the front end portion (for example, the front end portions 5511 and 5521) of the light shielding portion 55, the light emitted from the light emitting portion 53 at the sealing portion 56 is emitted to the outside, and the light that has passed through the user's body is incident. Is substantially coincident with the position of the contact surface 561 which is the incident / exit surface. According to this, the light reflected from the inner surface by the contact surface 561 can be shielded by the light shielding portion 55, and the light reflected from the inner surface can be prevented from entering the light receiving portion 54. Accordingly, it is possible to suppress a decrease in detection accuracy of biological information.

  In the sealing portion 56, the contact surface 561 which is the incident / exit surface is a curved surface. Specifically, the contact surface 561 is a convex curved surface whose center protrudes toward the + Z direction side from the outer edge. According to this, the sealing part 56 can be functioned as a convex lens. For this reason, the light radiate | emitted from the light emission part 53 can be condensed, and a biological body can be irradiated. Therefore, the detection accuracy of biological information can be further increased.

Here, the change in volume of the blood vessel increases when the difference between the intravascular pressure and the extravascular pressure is close to zero. In other words, when a pressure close to the blood pressure is applied to the blood vessel, the volume change of the blood vessel increases. In this case, since the change in the signal based on the amount of received light reflected by the blood vessel and received by the light receiving unit becomes large, it becomes easier to extract the pulse frequency and to calculate the pulse rate. For this reason, it is preferable that a pressure suitable for the blood vessel is applied to a part of the living body irradiated with light from the light emitting unit.
On the other hand, when the contact surface 561 that comes into contact with the living body is a convex curved surface, a predetermined pressure can be applied to the part of the living body irradiated with the light emitted from the light emitting unit 53. Therefore, by adjusting the curvature and protrusion amount of the contact surface 561, a pressure suitable for detecting a pulse wave can be applied to the blood vessel located at the light irradiation site. Therefore, it is possible to facilitate the detection of the pulse wave, which is biological information, and the determination of the pulse rate.

[Second Embodiment]
Next, a second embodiment of the present invention will be described.
The biological information measuring device according to this embodiment has the same configuration as the biological information measuring device 1A shown in the first embodiment, but differs from the biological information measuring device 1A in that the configurations of the light emitting unit and the light receiving unit are different. Is different. In the following description, parts that are the same as or substantially the same as those already described are assigned the same reference numerals and description thereof is omitted.

FIG. 9 is a diagram showing an internal configuration of the biological information measuring device 1B according to the present embodiment. Specifically, a cross section parallel to the YZ plane and passing through the center of the biological information measuring device 1B is viewed from the −X direction side. FIG.
As shown in FIG. 9, the biological information measuring device 1B has the same configuration and function as the biological information measuring device 1A except that the biological information detecting sensor 5B is used instead of the biological information detecting sensor 5A. The biological information detection sensor 5B has the same configuration and function as the measurement apparatus 1A except that the sensor unit 52B is provided instead of the sensor unit 52A.
The sensor unit 52B has the same configuration and function as the sensor unit 52A except that the sensor unit 52B includes a light emitting unit 73 and a light receiving unit 74 instead of the light emitting unit 53 and the light receiving unit 54.

Similarly to the light emitting unit 53, the light emitting unit 73 emits light (detection light, for example, green light) irradiated on the living body. The light emitting unit 73 is mounted at the same position on the light emitting unit 53 and the substrate 51, respectively. That is, two light emitting units 73 are provided at a predetermined interval in the + Y direction. In other words, the light emitting unit 73 includes a light emitting unit 73A and a light emitting unit 73B.
The light emitting unit 73A is located on the + Y direction side with respect to the light receiving unit 74 located at the center in the sensor unit 52B. The light emitting unit 73B is located on the −Y direction side with respect to the light receiving unit 74.
The light emitting units 73A and 73B correspond to the first light emitting unit and the second light emitting unit of the present invention, respectively, and are configured by light emitting elements such as LEDs (Light Emitting Diodes) in the present embodiment. In other words, the light emitting units 73A and 73B are LED bare chips that are not packaged, and are mounted on the substrate 51 by bare chip mounting. Examples of bare chip mounting include wire bonding, TAB (tape automated bonding) using a film having a lead wire, and flip chip using a bump.

Similar to the light receiving unit 54, the light receiving unit 74 receives the reflected light reflected by the living body, and outputs a signal corresponding to the amount of received light of the reflected light as a pulse wave signal indicating the waveform of the pulse wave. The light receiving unit 74 is disposed at the same position as the light receiving unit 54 in the sensor unit 52A. That is, the light receiving unit 74 is provided between the light emitting units 73A and 73B, and the dimension between the center of the light emitting unit 73A and the center of the light receiving unit 74 is between the center of the light emitting unit 73B and the center of the light receiving unit 74. The light receiving portion 74 is disposed at the center of the back surface portion 22.
In the present embodiment, the light receiving unit 74 is constituted by a light receiving element such as a PD. In other words, the light receiving portion 74 is a PD bare chip that is not packaged, and is mounted on the substrate 51 by bare chip mounting.

Also in such a sensor part 52B, the sealing part 56 seals the light emitting part 73, the light receiving part 74, and the light shielding part 55 on the mounting surface 51A of the substrate 51 to protect them.
Although not shown in detail in FIG. 9, also in the sensor unit 52 </ b> B, the position of the front end portion on the + Z direction side of the light shielding unit 55 is the position of the contact surface 561 formed in the convex curved surface shape of the sealing unit 56. It is almost coincident.

[Effects of Second Embodiment]
According to the measurement apparatus 1B according to the present embodiment described above, the same effects as the measurement apparatus 1A can be obtained, and the following effects can be obtained.
In the sensor unit 52B, the light emitting unit 73 and the light receiving unit 74 that are sealed together with the light shielding unit 55 by the sealing unit 56 are configured by bare chips that are not packaged. According to this, the bare chip has a smaller thickness dimension (an upright dimension from the substrate 51 when the chip is mounted on the substrate 51) than the packaged chip, and thus emits light compared to the light emitting unit 53 and the light receiving unit 54. The thickness dimension of the part 73 and the light-receiving part 74 can be made smaller, and the thickness dimension of the sealing part 56 can be made smaller. Therefore, the biological information detection sensor 5B, and hence the biological information measuring device 1B, can be further reduced in thickness.

The light emitting unit 73 configured by a bare chip emits light mainly from a surface facing the + Z direction side, but also emits light from surfaces on the ± X direction side and the ± Y direction side. On the other hand, the light receiving unit 74 configured by a bare chip receives light mainly on the surface facing the + Z direction side, but also receives light on the surfaces on the ± X direction side and the ± Y direction side. For this reason, the light emitted from the ± X direction side and ± Y direction side surfaces of the light emitting portion 73 travels in the sealing portion 56 by being internally reflected and the like, and the ± X direction side of the light receiving portion 74 In addition, there is a possibility that light is received on the surface on the ± Y direction side.
On the other hand, the light shielding part 55 is formed in a frame shape surrounding the light receiving part 74 on the ± X direction side and the ± Y direction side, so that the surfaces on the ± X direction side and the ± Y direction side of the light emitting part 73 are formed. The light that travels through the sealing portion 56 and travels toward the light receiving portion 74 can be shielded by the light shielding portion 55. Therefore, it is possible to preferably achieve the effect of the light shielding portion 55 being formed in a frame shape surrounding the light receiving portion 74.

[Third Embodiment]
Next, a third embodiment of the present invention will be described.
The biological information measuring device according to the present embodiment has the same configuration as the biological information measuring device 1B shown in the second embodiment, but the biological information measuring device is different in that the shape of the sealing part constituting the biological information detecting sensor is different. It is different from the information measuring device 1B. In the following description, parts that are the same as or substantially the same as those already described are assigned the same reference numerals and description thereof is omitted.

FIG. 10 is a side view showing a biological information detection sensor 5C included in the biological information measuring apparatus according to the present embodiment. Specifically, FIG. 10 is a side view of the biological information detection sensor 5C viewed from the −X direction side.
The biological information measuring apparatus according to the present embodiment has the same configuration and function as the biological information measuring apparatus 1B, except that the biological information detecting sensor 5C is used instead of the biological information detecting sensor 5B. The biological information detection sensor 5C has the same configuration and function as the biological information detection sensor 5B except that the sensor part 52C is provided instead of the sensor part 52B. The sensor part 52C is replaced with the sealing part 56. Except having the sealing part 76, it has the structure and function similar to the sensor part 52B.
That is, the biological information detection sensor 5C includes a substrate 51, a sensor unit 52C, a connector 57, and a plurality of elements 58 disposed on the mounting surface 51A of the substrate 51. The sensor unit 52C includes a light emitting unit 73 (73A). 73B), a light receiving portion 74 and a light shielding portion 55, and a sealing portion 76.

The sealing portion 76 is formed of a light-transmitting sealing resin similar to the sealing portion 56, and seals the light emitting portion 73, the light receiving portion 74, and the light shielding portion 55 to the mounting surface 51A. The surface on the + Z direction side in such a sealing portion 76 is an incident / exit surface on which light emitted from the light emitting portion 73 is emitted and light through the living body is incident. A contact surface 761 that can be contacted. The contact surface 761 is a plane substantially parallel to the XY plane (a plane substantially orthogonal to the + Z direction).
Even in such a sensor unit 52C, the position of the + Z direction side tip (for example, the tips 5511 and 5521) which is the tip in the protruding direction from the substrate 51 in the light shielding unit 55 is the same as the position of the contact surface 761. It almost agrees.

[Effect of the third embodiment]
According to the living body information measuring device concerning this embodiment explained above, the same effect as living body information measuring device 1B can be produced, and the following effect can be produced.
The contact surface 761 in the sealing part 76 is a plane. According to this, the thickness dimension in the biological information detection sensor 5C can be further reduced. Accordingly, the biological information detection sensor 5C can be further reduced in thickness, and as a result, the biological information measuring device employing the biological information detection sensor 5C can be further reduced in thickness.
In the example illustrated in FIG. 10, the biological information detection sensor 5C includes the light emitting unit 73 and the light receiving unit 74, but may be configured to include the light emitting unit 53 and the light receiving unit 54.

[Modification of Embodiment]
The present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
In the first and second embodiments, the contact surface 561 of the sealing portion 56 is a convex curved surface, and in the third embodiment, the contact surface 761 of the sealing portion 76 is a flat surface. However, the shape is not limited to this, and the shape of the surface on the light emission direction side in the sealing portion may be another shape.
For example, the contact surfaces 561 and 761 may be concave curved surfaces. When the contact surfaces 561 and 761 are concave curved surfaces, the light emitted from the light emitting portions 53 and 73 can be easily diffused outside the sealing portions 56 and 76, and the light incident on the sealing portions 56 and 76 can be obtained. Can be easily condensed on the light receiving portions 54 and 74.
As described above, by changing the shape and curvature of the contact surfaces 561 and 761, the light emitted from the light emitting units 53 and 73 can be effectively irradiated on the living body according to the use of the biological information detection sensor. Can enter the light receiving portions 54 and 74 efficiently.

  In each of the above embodiments, the connector 57 and the plurality of elements 58 are disposed on the mounting surface 51A where the sensor portions 52A to 52C are located on the substrate 51. That is, all the components disposed on the substrate 51 are disposed on the mounting surface 51A. However, the present invention is not limited to this, and at least one component excluding the sensor units 52A to 52C among the plurality of components disposed on the substrate 51 is disposed on the surface 51B opposite to the mounting surface 51A. May be.

In the first embodiment, the sensor unit 52A has two light emitting units 53A and 53B and one light receiving unit 54. In the second and third embodiments, the sensor units 52B and 52C have two light emitting units. The parts 73A and 73B and one light receiving part 74 are provided. However, the present invention is not limited to this, and the number of light emitting units and the number of light receiving units can be changed as appropriate. For example, one light emitting unit may be provided for one light receiving unit, or three or more light emitting units may be provided. Further, two or more light receiving units may be provided for one light emitting unit.
Furthermore, a plurality of sets of at least one light emitting unit and light receiving unit may be provided. In this case, each set may be sealed by a plurality of sealing portions.
In addition, the layout of the light emitting unit and the light receiving unit can be changed as appropriate. For example, a plurality of light emitting units may be spaced apart in the + X direction.

In the second and third embodiments, the sensor units 52B and 52C have the light emitting unit 73 and the light receiving unit 74, which are bare chips, respectively. However, the present invention is not limited to this, and either the light emitting unit or the light receiving unit may be a bare chip. For example, the sensor unit may have a combination of a light emitting unit 73 that is a bare chip and a packaged light receiving unit 54, and a combination of a packaged light emitting unit 53 and a light receiving unit 74 that is a bare chip. It is good also as a structure to have. Further, when the sensor unit has a plurality of light emitting units, all of the plurality of light emitting units may be configured by bare chips, some of the light emitting units are configured by bare chips, and other light emitting units are packaged. It may be constituted by a chip. Similarly, when the sensor unit has a plurality of light receiving units, all of the plurality of light receiving units may be configured by bare chips, some of the light receiving units are configured by bare chips, and other light receiving units are packaged. You may be comprised with the chip | tip made.
Moreover, although the board | substrate 51 was made into the rigid board | substrate, a flexible printed circuit board (FPC) may be sufficient.

In each of the above embodiments, the light shielding portion 55 is formed in a rectangular frame shape surrounding the light receiving portions 54 and 74. However, the shape of the light shielding portion 55 is not limited to this, and may be an annular shape or a polygonal shape other than a rectangle.
Further, the light shielding part 55 may not have a shape surrounding the light receiving parts 54 and 74. That is, the shape of the light-shielding part can be changed as appropriate as long as the light-shielding part is located between the light-emitting part and the light-receiving part and light emitted from the light-emitting part and directly incident on the light-receiving part can be shielded. For example, in a sensor unit having one light emitting unit and one light receiving unit, if there is a light shielding unit between the light emitting unit and the light receiving unit, the light shielding unit (shielding unit) is different from the direction from the light receiving unit toward the light emitting unit. ) May be omitted. Moreover, there may be a gap in a part of the light shielding part, or it may be divided into a plurality of shielding parts (light shielding parts).

  In each of the embodiments described above, the position of the front end portion of the light shielding portion 55 on the + Z direction side (the protruding direction side from the substrate 51) coincides with the positions of the contact surfaces 561 and 761. However, the present invention is not limited to this, and the position of the tip portion of the light shielding portion 55 can be changed as appropriate. As described above, it is preferable that the tip of the light shielding part is located on the + Z direction side (light emitting side) from the light emitting part.

  In each of the embodiments described above, the processing substrate 3 is provided with an acceleration sensor that detects acceleration acting on the measuring device. However, the present invention is not limited to this, and the acceleration sensor may not be provided on the processing substrate 3, and may be provided in a configuration other than the processing substrate 3 even when it is provided. For example, another sensor such as an acceleration sensor may be provided on the substrate of the biological information detection sensor. Furthermore, the biological information measuring device may include a position sensor (for example, a GPS sensor) that can measure position information.

In each of the embodiments described above, the biological information detection sensors 5A to 5C detect a pulse wave that is one of the biological information, and the processing board 3 uses the biological information based on the pulse wave signals output from the sensors 5A to 5C. Suppose you want to determine the other one, the pulse rate. That is, the above-described biological information measuring device measures the pulse wave and the pulse rate as biological information. However, the present invention is not limited to this, and the biological information that can be detected and measured by the biological information detection sensor and the biological information measuring device of the present invention is not limited to the pulse wave and the pulse rate. For example, biological information measurement for measuring other biological information such as HRV (Heart Rate Variability), RRI (RR Interval: pulse interval), blood pressure, blood glucose level, activity amount and calorie consumption, maximum oxygen intake (VO ₂ max), etc. The present invention may be applied to an apparatus.

  In each of the above embodiments, the biological information detection sensors 5A to 5C are employed in the biological information measuring devices 1A and 1B that measure biological information. However, a device in which the above-described biological information detection sensor is employed is not limited to a measurement device specialized for measuring biological information. That is, the device in which the biological information detection sensor is employed is not limited to the configuration of the measurement devices 1A and 1B, and may be employed in other devices such as a watch.

  DESCRIPTION OF SYMBOLS 1A, 1B ... Biological information measuring device, 2 ... Housing, 2A ... Front case, 2B ... Rear case, 2B1 ... Surface, 21 ... Front part, 22 ... Back part, 221 ... Opening part, 222 ... Arrangement part, 222A ... Bottom part , 223 to 225... Recessed portion, 3... Processing substrate, 4 .battery, 5A to 5C... Biological information detection sensor, 51. , 73 ... Light emitting part, 53A, 53B, 73A, 73B ... Light emitting part (first light emitting part, second light emitting part), 54, 74 ... Light receiving part, 55 ... Light shielding part, 551 ... First shielding part, 5511 ... Tip Part, 552 ... second shielding part, 5521 ... tip part, 56, 76 ... sealing part, 561, 761 ... contact surface (surface from which light emitted from the light emitting part is emitted to the outside), 57 ... connector, 58 ... element, 6 ... connecting member, P ... display unit, GP ... gap.

Claims (8)

A biological information detection sensor for detecting biological information of a living body,
A substrate,
A sensor unit provided on the substrate,
The sensor unit is
A light emitting unit that emits light irradiated to the living body;
A light receiving unit that receives light reflected by the living body;
A light shielding portion disposed between the light emitting portion and the light receiving portion;
A biological information detection sensor comprising: a light-transmitting sealing portion that contacts the living body and seals the light-emitting portion, the light-receiving portion, and the light-shielding portion to the substrate. The biological information detection sensor according to claim 1,
Either of the said light emission part and the said light-receiving part is a bare chip, The biological information detection sensor characterized by the above-mentioned. The biological information detection sensor according to claim 1 or 2,
The light emitting unit includes a first light emitting unit and a second light emitting unit,
The light receiving unit is provided between the first light emitting unit and the second light emitting unit,
The biological information detection sensor, wherein the light shielding part is provided between the first light emitting part and the light receiving part and between the second light emitting part and the light receiving part. The biological information detection sensor according to any one of claims 1 to 3,
The biological information detection sensor, wherein the light shielding portion surrounds the light receiving portion when viewed from a direction perpendicular to the substrate. In the living body information detection sensor according to any one of claims 1 to 4,
The position of the front end portion of the light shielding portion on the projecting direction side from the substrate is substantially coincident with the position of the surface where the light emitted from the light emitting portion is emitted to the outside in the sealing portion. Biological information detection sensor. In the living body information detection sensor according to any one of claims 1 to 5,
A biological information detection sensor, wherein a surface of the sealing portion from which light emitted from the light emitting portion is emitted to the outside is a curved surface. In the living body information detection sensor according to any one of claims 1 to 5,
The biological information detection sensor according to claim 1, wherein a surface of the sealing portion from which light emitted from the light emitting portion is emitted to the outside is a flat surface.   A biological information measuring device comprising the biological information detection sensor according to claim 1.

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