JP7124376B2 - Biological information measuring device - Google Patents

Description

The present invention relates to a biological information measuring device.

Conventionally, a pulse wave sensor that measures a pulse wave is known (see Patent Document 1, for example).
The pulse wave sensor described in Patent Document 1 has a bracelet structure (wristwatch type structure) including a body unit including an optical sensor section and belts attached to both ends of the body unit and wound around a living body. ing. Among these, the optical sensor section is provided on the back surface of the main unit, and includes a case, a transparent plate, a light emitting section, a light receiving section, and a light shielding wall.
The case is a box-shaped member that houses the light emitting unit and the light receiving unit. The case is embedded in the main unit so that the translucent plate closing the opening surface of the case is flush with the surface of the main unit.
The light-emitting part and the light-receiving part are provided on the same side of the living body. The light-emitting unit irradiates the living body with light through the light-transmitting plate, and the light-receiving unit receives the light transmitted through the living body through the light-transmitting plate.
The light shielding wall is a member that divides the case into a first area where the light emitting unit is mounted and a second area where the light receiving unit is mounted, and shields light that is directly incident from the light emitting unit to the light receiving unit. do.

Japanese Unexamined Patent Application Publication No. 2014-8310

In the pulse wave sensor described in Patent Literature 1, the light-transmitting plate covering the light-emitting portion and the light-receiving portion is arranged at a predetermined distance from the light-emitting portion and the light-receiving portion. As a result, the thickness dimension of the pulse wave sensor (dimension in the direction in which light is emitted from the light-emitting portion) is increased, and there is a concern that the portability is reduced.

SUMMARY OF THE INVENTION It is an object of the present invention to solve at least a part of the above-described problems, and one of the objects of the present invention is to provide a biological information measuring device capable of improving portability.

A biological information measuring device according to an aspect of the present invention includes a biological information detection sensor that detects biological information of a living body, and a housing that houses the biological information detection sensor, and the biological information detection sensor is attached to the living body. a light-emitting portion that emits light, a light-receiving portion that receives reflected light from the living body, and a sealing portion that seals the light-emitting portion and the light-receiving portion, the sealing portion comprising a translucent member that transmits the reflected light; a support substrate that supports the light emitting unit, the light receiving unit, and the sealing unit; and an opening in which the sealing portion and the inner side surface are in contact with each other, and the size of the opening in the contact surface is smaller than the size of the opening in the inner surface. .

The term "encapsulation" refers to enclosing the object to be sealed inside with a sealing material. It also includes the case where it protrudes outside the sealing material.
According to such a configuration, the light-transmitting plate of the pulse wave sensor described in Patent Document 1 can be omitted, so the thickness of the biological information measuring device can be reduced compared to the pulse wave sensor. . Therefore, the biological information measuring device can be made thinner, and portability can be improved.
Also, the sealing portion that seals the light emitting portion and the light receiving portion is positioned in the opening so that the size of the contact surface contacts the inner side surface of the opening that is smaller than the size of the inner surface. According to this, it is possible to prevent the sealing portion from falling out of the opening, that is, the sealing portion from falling toward the living body. Therefore, it is possible to prevent the parts constituting the biological information detection sensor from coming off.
In addition, when the entire circumference of the inner side surface of the opening and the entire circumference of the side surface of the sealing portion are in close contact, liquid and dust may enter the housing through the space between the inner side surface of the opening and the sealing portion. can be prevented from invading Therefore, in this case, the waterproofness and dustproofness of the biological information measuring device can be enhanced.

In the aspect described above, it is preferable that the inner side surface of the opening is inclined in a direction toward the center of the opening toward the contact surface side.
According to such a configuration, for example, even if a crack extending to the peripheral edge of the sealing portion occurs in the sealing portion, it is possible to suppress the sealing portion from dropping out of the opening. Therefore, even if a portion of the sealing portion is damaged, it is possible to reliably prevent the sealing portion from falling off toward the living body.

In the aspect described above, the hardness of the sealing portion is preferably smaller than the hardness of the inner side surface of the opening.
A low hardness means a low hardness, and a high hardness means a high hardness.
According to such a configuration, it is possible to facilitate close contact between the side surface of the sealing portion and the inner side surface of the opening. In particular, when the sealing portion is inserted into the opening from the inner surface side of the housing, the side surface of the sealing portion can be easily deformed along the inner side surface of the opening. Thereby, the side surface of the sealing portion and the inner side surface of the opening can be easily brought into close contact with each other. Therefore, it is possible to more effectively prevent the sealing portion from coming off, and further improve the above-described waterproof and dustproof properties.

In the aspect described above, the inner diameter of the opening on the contact surface is preferably smaller than the inner diameter of the opening on the inner surface.
According to such a configuration, the size of the opening in the contact surface can be reliably made smaller than the size of the opening in the inner surface. Therefore, it is possible to reliably prevent the sealing portion from falling out of the opening.

In the aspect described above, the opening area of the opening on the contact surface is preferably smaller than the opening area of the opening on the inner surface.
According to such a configuration, the size of the opening in the contact surface can be reliably made smaller than the size of the opening in the inner surface. Therefore, it is possible to reliably prevent the sealing portion from falling out of the opening.

In the aspect described above, the biological information detection sensor includes a light-shielding portion positioned between the light-emitting portion and the light-receiving portion, and the sealing portion seals the light-emitting portion, the light-receiving portion, and the light-shielding portion. preferably.
According to such a configuration, the light-shielding section can shield light from the light-emitting section that is incident on the light-receiving section without passing through the living body. Therefore, the detection accuracy of the reflected light by the biological information detection sensor can be improved, and the measurement accuracy of the biological information by the biological information measuring device can be improved.
Moreover, since the sealing portion seals the light emitting portion, the light receiving portion and the light shielding portion, it is not necessary to provide the light shielding portion outside the sealing portion. Therefore, it is possible to reduce the thickness of the biological information detection sensor and, by extension, the biological information measurement device.

In the above aspect, the biological information detection sensor is provided on a surface of the support substrate where the light emitting unit, the light receiving unit, and the sealing unit are located, and includes an amplifying unit that amplifies a signal from the light receiving unit, Preferably, the housing has a recess corresponding to the amplifying section on the inner surface.
According to such a configuration, since the signal from the light receiving section is amplified by the amplifying section, deterioration of the signal can be suppressed. Therefore, the reliability of biological information determined based on the signal from the light receiving section can be enhanced. In addition, since the amplifying section is arranged in the recess located on the inner surface of the housing, the dimension of the housing in the normal direction of the support substrate can be reduced. Therefore, it is possible to reduce the thickness of the biological information measuring device.

In the aspect described above, a circuit board that determines the biometric information based on a signal from the biometric information detection sensor, and a connection member that connects the biometric information detection sensor and the circuit board, wherein the support substrate includes: It is preferable to have a recessed gap forming portion that forms a gap between the inner surface and the inner surface so that a part of the connecting member is arranged.
According to such a configuration, a part of the connecting member that connects the biological information detection sensor and the circuit board is arranged in the gap formed by the gap forming portion. Therefore, the internal structure of the housing can be made smaller, and the biological information measuring device can be made smaller.

BRIEF DESCRIPTION OF THE DRAWINGS The front view which shows the biological information measuring device which concerns on one Embodiment of this invention. The figure which shows the back part of the biological information measuring device in the said embodiment. The figure which shows the internal structure of the biological information measuring device in the said embodiment. The perspective view which shows the back part and biometric information detection sensor in the said embodiment. The perspective view which shows the biometric information detection sensor in the said embodiment. The perspective view which shows arrangement|positioning of the biometric information detection sensor in the back part in the said embodiment. Sectional drawing which shows the back part and biometric information detection sensor in the said embodiment. Sectional drawing which expands and shows a part of back part and biometric information detection sensor in the said embodiment. The figure which shows the direction of the stress applied to the sealing part in the said embodiment. Sectional drawing which shows the deformation|transformation of the biometric information detection sensor in the said embodiment. Sectional drawing which shows the deformation|transformation of the biometric information detection sensor in the said embodiment.

An embodiment of the present invention will be described below with reference to the drawings.
[Schematic configuration of biological information measuring device]
FIG. 1 is a front view showing a biological information measuring device 1 according to this embodiment.
A biological information measuring device (hereinafter sometimes abbreviated as a measuring device) 1 according to the present embodiment is a wearable device that is worn on a user's body (living body) for use, and measures the user's biological information. Specifically, the measuring device 1 is used by being worn on a wearable part such as a user's wrist, detects the user's pulse wave, which is one of the biological information, and detects the pulse rate, which is another biological information. to measure. The measuring device 1, which will be described in detail later, has a feature 1 in that it has a configuration that improves portability, suppresses falling off of the parts that constitute the biological information detection sensor 5, and further enhances waterproof and dustproof properties. have one
The measuring device 1 includes a housing 2 and bands BN1 and BN2, as shown in FIG. The housing 2 includes a back portion 22 that comes into contact with the user's body when the measuring device 1 is worn, and a front portion 21 that has a display window for allowing the user to view the measured biological information.

[Band configuration]
The band BN1 extends from one end of the housing 2 and the band BN2 extends from the other end of the housing 2. As shown in FIG. That is, the bands BN1 and BN2 extend from opposite ends of the housing 2 in directions away from each other. The housing 2 is attached to the attachment site by connecting the bands BN1 and BN2 with clasps (not shown). The bands BN1 and BN2 may be formed integrally with the housing 2.

In the following description, the direction from the front portion 21 to the rear portion 22 of the housing 2 is the +Z direction. Also, the directions perpendicular to the +Z direction and perpendicular to each other are defined as the +X direction and the +Y direction. The −Z direction, −X direction and −Y direction are directions opposite to the +Z direction, +X direction and +Y direction respectively.
In this embodiment, the extension direction of the band BN1 is the +Y direction when viewed from the -Z direction side. When the measuring apparatus 1 is viewed from the -Z direction so that the +Y direction is upward, the direction from the right side to the left side is defined as the +X direction.
Of these directions, the +Z direction is also the direction in which light is mainly emitted from a light-emitting portion 53 constituting a sensor portion 52 of the biological information detection sensor 5, which will be described later. and the normal direction of the contact surface 22A, which will be described later.
In this specification, viewing an observation target from the +Z direction side is referred to as "plan view", except when the observation direction is designated.

[Housing configuration]
The housing 2 is configured by combining a front case and a rear case, and has a front portion 21 and a rear portion 22 (see FIG. 2), and a side portion 23 connecting the front portion 21 and the rear portion 22 .
The front part 21 is configured by a front case. The front part 21 has a translucent cover 211 that allows a user wearing the measuring device 1 to visually recognize the display part DP provided in the housing 2 .
A pair of buttons BT forming an operation unit are provided on the side portion 23 on the -X direction side.

FIG. 2 is a diagram showing the back portion 22 of the measuring device 1. As shown in FIG.
The back portion 22 is configured by a rear case. As shown in FIG. 2, the back surface portion 22 has a contact surface 22A that is a surface on the +Z direction side of the back surface portion 22 and contacts the user's body when the measuring device 1 is worn by the user.
The contact surface 22A is formed in a curved shape in which the center side bulges in the +Z direction side compared to the outer edge side. A substantially circular opening 221 is formed in the center of the contact surface 22A to expose the sensor portion 52 of the biological information detection sensor 5 housed in the housing 2 to the outside. The biological information detection sensor 5 and the opening 221 will be detailed later.

[Internal structure of housing]
FIG. 3 is a diagram showing the internal configuration of the measuring device 1, and more specifically, a cross section parallel to the YZ plane and passing through the center of the measuring device 1, viewed from the -X direction side.
The measuring device 1 has a housing 2 and a display section DP, as well as a circuit board 3, a battery 4, a biological information detection sensor 5, and a connecting member 6, which are housed in the housing 2, respectively, as shown in FIG.
A battery 4 supplies power to operate the measuring device 1 . In this embodiment, the battery 4 is a secondary battery that is charged with power supplied from the outside under the control of the circuit board 3, but it may be a primary battery.
The connection member 6 is a member that electrically connects the circuit board 3 and the biological information detection sensor 5 . In this embodiment, the connection member 6 is configured by FPC (flexible printed circuit board), but may be a conductive member such as a cable or harness.

[Configuration of circuit board]
The circuit board 3 is a control board that controls the entire measurement apparatus 1, and although not shown in detail, has a configuration in which a plurality of circuit elements are provided on a rigid board. As such circuit elements, the circuit board 3 has an acceleration sensor, a wireless communication circuit, a display control circuit, a memory circuit, and a control circuit.

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

The storage circuit is composed of a non-volatile memory such as a flash memory, and stores programs and data necessary for the operation of the measuring device 1 . In addition, the storage circuit stores detection results from the biological information detection sensor 5 and the acceleration sensor, and analysis results from the control circuit.
The control circuit is composed of an arithmetic processing circuit such as a CPU (Central Processing Unit), and controls the entire measuring device 1 autonomously or according to user's input operation to an operation unit such as a button BT. For example, the control circuit determines the user's pulse rate based on the pulse wave signal input from the biological information detection sensor 5 and the body motion signal input from the acceleration sensor. The control circuit stores the determined pulse rate in the storage circuit, displays the pulse rate on the display unit DP, and transmits the pulse rate to an external device via a wireless communication circuit as necessary.

[Configuration of biological information detection sensor]
FIG. 4 is a perspective view of the sensor portion 52 and the back portion 22 of the biological information detection sensor 5 as seen from the +Z direction side. 5 is a perspective view of the biological information detection sensor 5 as seen from the +Z direction side. 4 and 5, in order to facilitate understanding of the arrangement of the light emitting portion 53, the light receiving portion 54, and the light shielding portion 55 in the sensor portion 52, the illustration of the sealing portion 56 constituting the sensor portion 52 is omitted. there is
The biometric information detection sensor 5 is a biometric information detection sensor used in a biometric information measurement device that measures biometric information, exemplified by the measurement device 1, and irradiates a living body (for example, a user's body) with light. A signal indicating the amount of light received by the reflected light is output as a pulse wave signal indicating the pulse wave of the living body. The biological information detection sensor 5 has a substrate 51, a sensor section 52, an amplifier section 57 and a connector 58, as shown in FIGS.

[Substrate configuration]
The substrate 51 is a supporting substrate that supports the sensor section 52, the amplifying section 57, and the connector 58 provided on the mounting surface 51A, which is the surface on the +Z direction side. In this embodiment, as shown in FIG. 5, the substrate 51 is a rectangular rigid substrate that is long in the +Y direction and short in the +X direction.
The substrate 51 has a gap forming portion 511 recessed in the +Y direction at the end on the -Y direction side. The gap forming portion 511 forms a gap GP (see FIG. 3) through which the connection member 6 connecting the connector 58 and the circuit board 3 is inserted between the gap forming portion 511 and a third concave portion 225 to be described later.
Circuit elements are not arranged on the rear surface 51B of the substrate 51 opposite to the mounting surface 51A. However, a circuit element having a predetermined function may be arranged on the rear surface 51B.

[Configuration of amplifier]
The amplification unit 57 is arranged at a position on the +Y direction side with respect to the sensor unit 52 on the mounting surface 51A, amplifies a signal (pulse wave signal) input from the light receiving unit 54 described later of the sensor unit 52, and outputs it to the connector 58. do. The amplifier 57 has a function as an AFE (Analog Front End) for processing an input signal, and performs processing such as amplification, noise removal, and A/D conversion on the input signal. That is, the amplification section 57 has a primary amplification section, a filter section, a secondary amplification section, an A/D conversion section, and a communication section.

[Connector configuration]
The connector 58 is provided on the mounting surface 51A on the -Y direction side with respect to the sensor section 52, and functions as a connection section that is connected to the connection member 6. FIG. Connector 58 outputs the pulse wave signal input from amplifier 57 to circuit board 3 via connecting member 6 .

[Configuration of sensor part]
When the biological information detection sensor 5 is attached to the back surface portion 22, the sensor portion 52 is arranged inside the opening portion 221 in plan view (seen from the normal direction of the contact surface 22A of the back surface portion 22). The sensor unit 52 irradiates a living body with light and receives light reflected by the living body, and outputs a signal corresponding to the amount of received light as a signal (for example, a pulse wave signal) indicating biological information. As shown in FIGS. 4 and 5, the sensor section 52 has a light emitting section 53 (53A, 53B), a light receiving section 54 and a light blocking section 55, and also has a sealing section 56 (see FIG. 6) which will be described later.

[Structure of Light Emitting Part]
The light emitting unit 53 emits light (detection light, for example, green light) with which the living body is irradiated. Two light-emitting portions 53 are provided at a predetermined interval so as to sandwich the light-receiving portion 54 in the +Y direction in plan view. In other words, the light emitting portion 53 has a light emitting portion 53A located on the +Y direction side and a light emitting portion 53B located on the -Y direction side with respect to the light receiving portion . One of the light emitting portions 53A and 53B is the first light emitting portion, and the other is the second light emitting portion.

The light-emitting portions 53A and 53B in this embodiment include a light-emitting element (not shown) such as an LED (Light Emitting Diode), a covering portion 531 covering the light-emitting element so as to surround it, a lens 532 provided in the covering portion 531, have That is, each of the light emitting units 53A and 53B is a packaged LED chip.
Although detailed illustration is omitted, the covering portion 531 includes a reflecting portion surrounding the light emitting element on four sides (±X direction side and ±Y direction side) when viewed from a position facing the light emitting surface of the light emitting element, and a light emitting element and a reflecting portion. and a sealing resin filled between the parts. Of the light emitted from the light emitting element, the light emitted in the ±X direction side and the ±Y direction side is reflected in the +Z direction side by the reflecting portion and enters the lens 532 . Note that light emitted from the light emitting element in the +Z direction also enters the lens 532 . The light emitted from the light emitting element and incident on the lens 532 is condensed by the lens 532 and emitted.
It should be noted that the light emitting units 53A and 53B can be individually switched on and off. Therefore, at least one of the light emitting units 53A and 53B is turned on when the pulse wave is detected, but the light emitting units 53A and 53B do not necessarily have to be turned on at the same time.

[Structure of light receiving part]
The light receiving unit 54 receives the reflected light reflected by the living body and outputs a signal indicating the amount of received light of the reflected light. The light receiving section 54 is provided between the two light emitting sections 53A and 53B in plan view.
Although detailed illustration is omitted, the light receiving section 54 has a light receiving element that is a PD (Photodiode), a covering section that covers the light receiving element, and a wavelength limiting filter. That is, the light receiving section 54 is a packaged PD chip.
Among these filters, the wavelength limiting filter limits the wavelength of light received by the light receiving section 54 by transmitting light having substantially the same wavelength as the light emitted from the light emitting section 53 .
In addition to the above, the light receiving section 54 may have an angle limiting filter. The angle limiting filter transmits light whose incident angle, which is the angle of the incident light with respect to the normal to the filter layer constituting the angle limiting filter, is less than a predetermined value (for example, 30°), and transmits light whose incident angle is greater than or equal to the predetermined value. It is a filter that suppresses the transmission of When such an angle limiting filter is provided, disturbance light that becomes noise is suppressed from being incident on the light receiving element.

[Configuration of light shielding part]
The light shielding portion 55 shields the light emitted from the light emitting portion 53 and directly directed to the light receiving portion 54 without passing through the living body. The light shielding portion 55 is arranged between the light emitting portion 53 (53A, 53B) and the light receiving portion .
Specifically, the light shielding portion 55 has a first shielding portion 551, a second shielding portion 552, a third shielding portion 553, and a fourth shielding portion 554, and is visible from the direction perpendicular to the substrate 51 (+Z direction). The shielding portions 551 to 554 form a rectangular frame surrounding the light receiving portion 54 .
The first shielding portion 551 is positioned on the +Y direction side with respect to the light receiving portion 54 and is positioned between the light emitting portion 53A and the light receiving portion 54 .
The second shielding portion 552 is positioned on the −Y direction side with respect to the light receiving portion 54 and is positioned between the light emitting portion 53B and the light receiving portion 54 .
The third shielding portion 553 is positioned on the +X direction side with respect to the light receiving portion 54 , and the fourth shielding portion 554 is positioned on the −X direction side with respect to the light receiving portion 54 .

Furthermore, the light shielding portion 55 has a bent portion 555 connected to the third shielding portion 553 and a bent portion 556 connected to the fourth shielding portion 554 . These bent portions 555 and 556 are plate-like attachment portions along the XY plane, and the -Z direction side surface is attached to the mounting surface 51A by soldering or the like, whereby the light shielding portion 55 is attached to the mounting surface 51A.

[Structure of sealing part]
FIG. 6 is a perspective view showing the arrangement of the biological information detection sensor 5 with respect to the back portion 22, in other words, an exploded perspective view showing the back portion 22 and the biological information detection sensor 5. FIG. 7 is a view showing a cross section along the YZ plane of the biological information detection sensor 5 and the back portion 22 before being attached to the back portion 22. As shown in FIG.
As shown in FIGS. 6 and 7, the sealing portion 56 seals the light emitting portion 53, the light receiving portion 54, and the light shielding portion 55 on the mounting surface 51A of the substrate 51, and the light emitting portion 53, the light receiving portion 54, and the light shielding portion protect the part 55; The sealing portion 56 is exposed to the outside of the housing 2 through an opening 221 formed in the back portion 22 . That is, the sealing portion 56 is formed in a shape that matches the shape of the opening 221 in plan view, that is, in a substantially circular shape including an arc-shaped portion.

Such a sealing portion 56 is formed of a translucent member made of translucent resin (sealing resin) that transmits light emitted from the light emitting portion 53 and light incident on the light receiving portion 54. there is Therefore, 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 passes through the sealing portion 56 to the light-receiving portion. 54.
It should be noted that sealing does not necessarily mean that the sealing target, which is the target to be sealed, is entirely wrapped in the sealing portion 56 . For example, if the sealing portion 56 encloses the light-emitting portion 53 and the light-receiving portion 54, which are objects to be sealed, in the sealing portion 56, a portion of the light-shielding portion 55, which is also to be sealed, is part of the sealing portion 56. May be exposed to the outside.

Such a sealing portion 56 has a surface on the +Z direction side, and has a living body contact surface 561 that is a first contact surface that comes into contact with the living body when the measuring device 1 is attached to the living body. The living body contact surface 561 is also an emission surface through which the light emitted from the light emitting unit 53 is mainly emitted to the outside of the sealing unit 56, and the light incident on the light receiving unit 54 is mainly incident from the outside (living body). It is also the plane of incidence where the That is, the living body contact surface 561 is a light input/output surface for the sealing portion 56 .
As shown in FIG. 7, such a living body contact surface 561 is formed in a convex curved shape in which the central portion when viewed from the +Z direction side bulges in the +Z direction from the outer edge side. The shape of the living body contact surface 561 is a shape intended to collect the light emitted from the light emitting section 53 and irradiate the living body with the light.

6 and 7, the sealing portion 56 is a side surface of the sealing portion 56, and when the biological information detection sensor 5 is attached to the back surface portion 22 from the -Z direction side, the opening 221 is formed. has an inner surface contact surface 562 that is a second contact surface that contacts the inner side surface 2211 of the . The inner contact surface 562 will be detailed later.

Here, the position of the tip portion of the light shielding portion 55 in the +Z direction, which is the projection direction from the mounting surface 51A, is on the +Z direction side of the +Z direction side end of the light emitting portion 53 (53A, 53B), and is in contact with a living body. It is located on the −Z direction side of the surface 561 . For example, as shown in FIG. 7, the position of the tip portion 5511 on the +Z direction side of the first shielding portion 551 is on the +Z direction side from the end portion on the +Z direction side of the light emitting portion 53A and − from the living body contact surface 561. It is located on the Z direction side. The same applies to the position of the tip portion 5521 on the +Z direction side of the second shielding portion 552 . Also, although illustration is omitted, the positions of the tip portions on the +Z direction side of the third shielding portion 553 and the fourth shielding portion 554 are the same as those of the tip portions 5511 and 5521 .
Such a light shielding portion 55 can shield the light from the light emitting portion 53 that directly travels to the light receiving portion 54 without passing through the living body.

[Detailed configuration of the rear part]
As described above, the back surface portion 22 constitutes the +Z direction side portion of the housing 2 that accommodates the circuit board 3 , the battery 4 , and the biological information detection sensor 5 . As shown in FIG. 7, the back surface portion 22 has an inner surface 22B with which the biological information detection sensor 5 (substrate 51) contacts from the −Z direction side with the sensor portion 52 facing the +Z direction side.

The inner surface 22</b>B contacts the substrate 51 of the biological information detection sensor 5 to support the biological information detection sensor 5 . The substrate 51 supported on the inner surface 22B is fixed to the housing 2 (for example, the inner surface 22B) by fixing members such as screws (not shown) or adhesive.
An opening 221 that exposes the sensor unit 52 to the outside of the housing 2 is formed in the rear surface portion 22, and first concave portions that are concave in the +Z direction from the inner surface 22B are formed on the ±Y direction sides of the opening 221. 223 and a second recess 224 are formed.
A first concave portion 223 located on the +Y direction side with respect to the opening portion 221 is a concave portion for avoiding the amplifying portion 57 . A second recess 224 positioned on the −Y direction side with respect to the opening 221 is a recess for avoiding the connector 58 .

In addition, the inner surface 222 has a third recess 225 connected to the second recess 224 at the edge on the -Y direction side. A portion of the connecting member 6 connected to the connector 58 is arranged in the third recess 225 . More specifically, the third concave portion 225 forms a gap GP (see FIG. 3) together with the gap forming portion 511 of the substrate 51 . The connection member 6, one end of which is connected to the connector 58 located on the mounting surface 51A, which is the surface on the +Z direction side of the substrate 51, passes through the gap GP and is located on the −Z direction side with respect to the substrate 51. It is connected to the circuit board 3 . As a result, the pulse wave signal output from the biological information detection sensor 5 is output to the circuit board 3 via the connection member 6 .

[Shape of opening]
The opening 221 penetrates the back surface 22 from the contact surface 22A to the inner surface 22B, and is shaped such that the inner diameter decreases toward the +Z direction side, which is the contact surface 22A side. Specifically, as shown in FIG. 7, the inner diameter L11 of the opening 221 on the contact surface 22A is smaller than the inner diameter L12 of the opening 221 on the inner surface 22B. In other words, the opening area of the opening 221 on the contact surface 22A is smaller than the opening area of the opening 221 on the inner surface 22B.
The inner side surface 2211 of such an opening 221 is formed along the entire circumference in the circumferential direction centered on the central axis CL1 of the opening 221 parallel to the +Z direction. It is an inclined surface that inclines in a direction close to (the central axis CL1). In other words, the inner side surface 2211 is an inclined surface that inclines toward the center of the opening 221 (center axis CL1) from the inner surface 22B of the back surface portion 22 toward the contact surface 22A.
The sealing portion 56 of the sensor portion 52 is arranged in such an opening portion 221 when the biological information detection sensor 5 is attached to the inner surface 22B.

[Shape of sealing part]
The sealing portion 56 is a side surface of the sealing portion 56 and has an inner surface contact surface 562 that contacts the inner side surface 221A of the opening 221 .
The inner surface contact surface 562 is formed along the entire circumference in the circumferential direction centered on the central axis CL2 of the sealing portion 56 parallel to the +Z direction, and the inner surface contact surface 562 increases from the −Z direction side toward the +Z direction side. This is an inclined surface that is inclined in a direction approaching the center of the (central axis CL2). That is, in the present embodiment, the outer diameter of the sealing portion 56 decreases in the +Z direction, and the living body contact surface 561, which is the surface on the +Z direction side, is formed in a convex truncated cone shape. Specifically, the outer diameter L22 at the −Z direction end of the sealing portion 56 is larger than the outer diameter L21 at the +Z direction end. In other words, the cross-sectional area on the XY plane at the −Z direction end of the sealing portion 56 is larger than the cross-sectional area on the XY plane at the +Z direction end. The outer diameter L21 substantially matches the inner diameter L11 of the opening 221 in the contact surface 22A, and the outer diameter L22 substantially matches the inner diameter L12 of the opening 221 in the inner surface 22B.

FIG. 8 is a cross-sectional view showing an enlarged part of the back portion 22 and the biological information detection sensor 5. As shown in FIG. In addition, FIG. 8 shows an enlarged part of each of the biological information detection sensor 5 and the rear surface portion 22 before the biological information detection sensor 5 is attached to the rear surface portion 22 .
Here, in the biological information detection sensor 5 that is not attached to the back surface portion 22, the inclination angle of the inner surface contact surface 562 of the sealing portion 56 with respect to the +Z direction is the inclination angle of the inner side surface 2211 of the opening 221 with respect to the +Z direction. less than For example, as shown in FIG. 8, a plane parallel to the XZ plane is a virtual plane PL, and an inclination angle α is an inclination angle of the inner surface contact surface 562 at the end of the sealing portion 56 on the +Y direction side with respect to the virtual plane PL, Assuming that the inclination angle of the inner side surface 2211 at the +Y direction side end of the opening 221 with respect to the virtual plane PL is an inclination angle β, the inclination angle α is smaller than the inclination angle β. Although illustration is omitted, the same applies to other portions of the inner contact surface 562 and other portions of the inner side surface 2211 .

That is, the inner diameter L11 and the opening area at the edge of the opening 221 on the contact surface 22A side, and the outer diameter L21 and the cross-sectional area (cross-sectional area along the XY plane) at the portion corresponding to the edge in the sealing portion 56 and approximately match. In addition, the inner diameter L12 and the opening area at the edge of the opening 221 on the inner surface 22B side substantially match the outer diameter L22 and the cross-sectional area at the portion corresponding to the edge in the sealing portion 56 .
However, the outer diameter and cross-sectional area at a position corresponding to the position in the sealing portion 56 are larger than the inner diameter and opening area at a position from the contact surface 22A to the inner surface 22B on the inner side surface 2211 of the opening 221. . For example, the outer diameter and cross-sectional area of the sealing portion 56 at the center of the inner surface contact surface 562 in the +Z direction are larger than the inner diameter and opening area at the center of the inner side surface 2211 in the +Z direction.

On the other hand, when the sealing resin forming the sealing portion 56 is hardened, the hardness thereof is lower than that of the material forming the inner side surface 2211, that is, the material forming the rear surface portion 22 (synthetic resin in this embodiment). In other words, the hardness of the sealing portion 56 is less than the hardness of the inner side surface 2211 . Examples of such a sealing material include elastomer materials such as silicon-based elastomers, fluorine-based elastomers, conjugated diene-based elastomers, olefin-based elastomers, vinyl chloride-based elastomers, urethane-based elastomers, ester-based elastomers, and amide-based elastomers. is mentioned.

FIG. 9 is a diagram showing directions of stress applied to the sealing portion 56. As shown in FIG.
Therefore, when the sealing portion 56 is inserted into the opening 221 from the −Z direction side, the inner surface contact surface 562 of the sealing portion 56 and the inner side surface 2211 of the opening 221 come into contact with each other. Furthermore, when the biological information detection sensor 5 is pressed in the +Z direction as indicated by the arrow A1, the inner surface contact surface 562 comes into contact with the inner side surface 2211 and the movement of the sealing portion 56 in the +Z direction is restricted. , a stress that presses the inner surface contact surface 562 against the inner side surface 2211 acts on the sealing portion 56 as indicated by an arrow A2. As a result, the inner contact surface 562 having a smaller inclination angle than the inner side surface 2211 deforms along the inner side surface 2211 and comes into close contact with the inner side surface 2211 .

When the measuring device 1 is attached to the living body, the sealing portion 56, which contacts the living body at the living body contact surface 561, receives pressure from the living body, that is, in the -Z direction, as indicated by an arrow A3. pressure is applied.
Here, since the biological information detection sensor 5 is fixed to the back portion 22, the movement of the biological information detection sensor 5 in the -Z direction according to the pressure from the living body is restricted.
Therefore, as indicated by an arrow A2, the stress that presses the inner contact surface 562 against the inner side surface 2211 acts on the sealing portion 56, and the inner contact surface 562 firmly adheres to the inner side surface 2211.
In this way, when the measuring device 1 is used, the inner contact surface 562 of the sealing portion 56 is kept in close contact with the inner side surface 2211 . Therefore, the inclination of the inner side surface 2211 not only prevents the sealing portion 56 from falling off in the +Z direction, but also prevents liquid and dust from entering the housing 2 from between the sealing portion 56 and the inner side surface 2211. is suppressed.

[Effects of Embodiment]
The biological information measuring device 1 according to this embodiment described above has the following effects.
The biological information measurement device 1 includes a back portion 22 forming a housing 2 and a biological information detection sensor 5 housed in the housing 2 . The biometric information detection sensor 5 has a sensor section 52 that detects biometric information of a living body, and a substrate 51 on which the sensor section 52 is supported. The sensor unit 52 is composed of a light emitting unit 53 (53A, 53B) for irradiating the living body with light, a light receiving unit 54 for receiving the reflected light reflected by the living body, and a translucent member for transmitting the reflected light. and a sealing portion 56 that seals the portion 53 and the light receiving portion 54 . On the other hand, the back portion 22 has a contact surface 22A that contacts the living body, an inner surface 22B that contacts the substrate 51, and an opening 221 that penetrates from the contact surface 22A to the inner surface 22B and contacts the sealing portion 56 and the inner side surface 2211. , has The size of the opening 221 on the contact surface 22A is smaller than the size of the opening 221 on the inner surface 22B.

According to such a configuration, it is possible to omit the translucent plate that covers the light emitting unit 53 and the light receiving unit 54 with a predetermined gap therebetween. As a result, the thickness dimension of the measuring device 1 can be reduced, so that the thickness of the measuring device 1 can be reduced, and the portability of the measuring device 1 can be improved.
Further, the sealing portion 56 is arranged in the opening 221 in which the size of the contact surface 22A of the back portion 22 is smaller than the size of the inner surface 22B of the back portion 22 and contacts the inner side surface 2211 of the opening 221 . According to this, it is possible to prevent the sealing portion 56 from falling out of the opening 221, that is, the sealing portion 56 from falling toward the living body. Therefore, it is possible to prevent the parts forming the sensor section 52 from coming off.

The inner side surface 2211 is inclined in a direction toward the center of the opening 221 toward the contact surface 22A side (that is, +Z direction side) over the entire circumference. According to this, for example, even if a crack extending to the peripheral edge of the sealing portion 56 occurs in the sealing portion 56 , it is possible to prevent the sealing portion 56 from dropping out of the opening 221 . Therefore, even if a portion of the sealing portion 56 is damaged, the inclination of the inner side surface 2211 can prevent the sealing portion 56 from falling off toward the living body.

The hardness of the sealing portion 56 is smaller than the hardness of the inner side surface 2211 of the opening 221 , that is, the hardness of the back surface portion 22 . According to this, the inner surface contact surface 562 which is the side surface of the sealing portion 56 and the inner side surface 2211 of the opening 221 can be easily brought into close contact with each other.
In particular, in the present embodiment, the biological information detection sensor 5 (sensor portion 52) is inserted into the back portion 22 from the side opposite to the contact surface 22A side of the back portion 22 so that the sealing portion 56 is inserted into the opening portion 221. Since it is attached to the inner surface 22B of the sealing portion 56, the inner surface contact surface 562 of the sealing portion 56 can be easily deformed along the inner side surface 2211. This makes it easier to bring the inner contact surface 562 and the inner side surface 2211 into close contact with each other. Therefore, it is possible to more effectively prevent the sealing portion 56 from coming off, and to improve the waterproofness and dustproofness of the measuring device 1 .

The inner diameter L11 of the opening 221 on the contact surface 22A is smaller than the inner diameter L12 of the opening 221 on the inner surface 22B. According to this, the size of the opening 221 on the contact surface 22A can be reliably made smaller than the size of the opening 221 on the inner surface 22B. Therefore, it is possible to reliably prevent the sealing portion 56 from falling out of the opening 221 .

The opening area of the opening 221 on the contact surface 22A is smaller than the opening area of the opening 221 on the inner surface 22B. According to this, the size of the opening 221 on the contact surface 22A can be reliably made smaller than the size of the opening 221 on the inner surface 22B. Therefore, it is possible to reliably prevent the sealing portion 56 from falling out of the opening 221 .

The biological information detection sensor 5 includes a light shielding portion 55 arranged between the light emitting portion 53 and the light receiving portion 54 . According to this, the light that enters the light receiving section 54 from the light emitting section 53 without passing through the living body can be blocked by the light blocking section 55 . Therefore, the detection accuracy of the reflected light by the biological information detection sensor 5 can be improved, and the measurement accuracy of the biological information by the biological information measuring device 1 can be improved.
In addition, the sealing portion 56 seals the light-shielding portion 55 in addition to the light-emitting portion 53 and the light-receiving portion 54 . According to this, it is not necessary to provide the light shielding part 55 outside the sealing part 56 . Therefore, the thickness of the biological information detection sensor 5 and thus the biological information measurement device 1 can be reduced.

The biological information detection sensor 5 is provided on a mounting surface 51A, which is a surface on which the light emitting portion 53, the light receiving portion 54, and the sealing portion 56 are positioned in the substrate 51 as a support substrate, and an amplifying portion that amplifies the signal from the light receiving portion 54. 57. According to this, deterioration of the signal from the light receiving section 54 can be suppressed. Therefore, the reliability of biological information determined based on the signal from the light receiving section 54 can be enhanced. Further, the rear surface portion 22 of the housing 2 has a concave portion 223 corresponding to the amplifying portion 57 on the inner surface 22B, and the amplifying portion 57 is arranged in the concave portion 223. The dimensions of the housing 2 in the direction can be reduced. Therefore, the thickness of the biological information measurement device 1 can be reduced.

The biological information measuring apparatus 1 includes a circuit board 3 for determining the pulse rate, which is one piece of biological information, based on a signal from the biological information detection sensor 5, and a connection member 6 for connecting the biological information detection sensor 5 and the circuit board 3. And prepare. Further, the substrate 51 has a recessed gap forming portion 511 that forms a gap GP in which a portion of the connection member 6 is arranged between the substrate 51 and the recess 225 formed on the inner surface. According to this, the internal structure of the housing 2 can be miniaturized, and miniaturization of the biological information measuring device 1 can be achieved.

In this embodiment, before the biological information detection sensor 5 is attached to the back surface portion 22, the inclination angle of the inner contact surface 562 with respect to the +Z direction is smaller than the inclination angle of the inner side surface 2211 with respect to the +Z direction. Therefore, when the biological information detection sensor 5 is attached along the +Z direction from the −Z direction side to the inner surface 22B of the back portion 22, the sealing portion 56 is arranged so that the inner surface contact surface 562 is along the inner side surface 2211. Since it can be deformed, the degree of close contact between the inner contact surface 562 and the inner side surface 2211 can be increased. Therefore, the waterproofness and dustproofness of the measuring device 1 can be further enhanced.

[Modification of Embodiment]
The present invention is not limited to the above-described embodiments, but includes modifications, improvements, and the like within the scope of achieving the object of the present invention.
In the above embodiment, the tip portion of the light shielding portion 55 constituting the sensor portion 52 of the biological information detection sensor 5 is located on the +Z direction side of the light emitting portion 53 and on the -Z direction side of the living body contact surface 561 of the sealing portion 56. was assumed to be located in However, not limited to this, the position of the tip portion of the light shielding portion 55 can be changed as appropriate.

FIG. 10 is a sectional view showing a biometric information detection sensor 5A that is a modification of the biometric information detection sensor 5. As shown in FIG. More specifically, FIG. 10 is a diagram showing a cross section along the YZ plane of the biological information measurement device 1 employing the biological information detection sensor 5A.
For example, a biological information detection sensor 5A having a sensor unit 52A shown in FIG.
The sensor section 52A has the same configuration and functions as the sensor section 52 except that it has a light shielding section 55A instead of the light shielding section 55. As shown in FIG.
Like the light shielding part 55, the light shielding part 55A is located between the light emitting part 53 and the light receiving part 54, and shields the light from the light emitting part 53 toward the light receiving part 54 without passing through the living body. The light shielding portion 55A has first to fourth shielding portions 551 to 554 and bent portions 555 and 556, and is formed in a frame shape surrounding the light receiving portion 54 in plan view.

The tip of the light shielding portion 55</b>A on the +Z direction side is located on the +Z direction side of the light emitting portion 53 and coincides with the living body contact surface 561 of the sealing portion 56 . For example, the distal end portion 5511 of the first shielding portion 551 is positioned substantially at the same position as the biological contact surface 561 , and the distal end portion 5521 of the second shielding portion 552 is positioned substantially at the biological contact surface 561 .
According to such a biological information detection sensor 5A, the light emitted from the light emitting section 53 (53A, 53B) is internally reflected by the living body contact surface 561 which is an interface, passes over the light shielding section 55, and reaches the light receiving section 54. It can suppress that it injects. Therefore, it is possible to improve the detection accuracy of light through the living body by the biological information detection sensor 5A.
In order to align the position of the living body contact surface 561 and the position of the tip of the light shielding portion 55A, a method of molding the sealing portion 56 using a mold or the like, or a method of forming the sealing portion 56 so that these positions substantially coincide with each other. A method of scraping the sealing portion 56 can be employed.

FIG. 11 is a sectional view showing a biometric information detection sensor 5B that is a modification of the biometric information detection sensor 5. As shown in FIG. More specifically, FIG. 11 is a diagram showing a cross section along the YZ plane of the biological information measurement device 1 employing the biological information detection sensor 5B.
Further, for example, a biological information detection sensor 5B having a sensor unit 52B shown in FIG.
The sensor section 52B has the same configuration and functions as the sensor section 52 except that it has a light shielding section 55B instead of the light shielding section 55. As shown in FIG.
Like the light shielding part 55, the light shielding part 55B is located between the light emitting part 53 and the light receiving part 54, and shields the light from the light emitting part 53 toward the light receiving part 54 without passing through the living body. The light shielding portion 55A has first to fourth shielding portions 551 to 554 and bent portions 555 and 556, and is formed in a frame shape surrounding the light receiving portion 54 in plan view.

The tip of the light shielding portion 55B on the +Z direction side is located not only on the +Z direction side of the light emitting portion 53 but also on the +Z direction side of the living body contact surface 561 of the sealing portion 56 . In other words, the tip of the light shielding portion 55B protrudes from the living body contact surface 561 in the +Z direction. For example, the distal end portion 5511 of the first shielding portion 551 is located on the +Z direction side of the biological contact surface 561, and the distal end portion 5521 of the second shielding portion 552 is also located on the +Z direction side of the biological contact surface 561. is doing.
According to such a biological information detection sensor 5A, although the contact (wearability) between the living body contact surface 561 and the living body is slightly deteriorated, the light passes over the light shielding part 55 and enters the light receiving part 54 without going through the living body. You can definitely block the light. Therefore, it is possible to improve the detection accuracy of light through the living body by the biological information detection sensor 5B.
Even when the tip of the light shielding portion 55B is located on the +Z direction side of the living body contact surface 561 in this way, the tip of the light shielding portion 55B is the vertex P located on the most +Z direction side of the living body contact surface 561. If it is positioned further in the -Z direction, the living body contact surface 561 can be brought into contact with the living body without impairing the contactability (wearability).

In the above-described embodiment, the inner side surface 2211 of the opening 221 is an inclined surface that inclines toward the center of the opening 221 (center axis CL1) along the entire circumference toward the contact surface 22A (+Z direction side). and In addition, the inner surface contact surface 562 in contact with the inner side surface 2211 of the sealing portion 56 is an inclined surface that slopes toward the center (center axis CL2) of the sealing portion 56 toward the +Z direction over the entire circumference. and However, not limited to this, the inner side surface 2211 and the inner surface contact surface 562 do not necessarily have to be inclined surfaces over the entire circumference. For example, the inner side surface 2211 and the inner surface contact surface 562 may include a portion that is not inclined with respect to the +Z direction in the circumferential direction, and is inclined in the direction opposite to the direction toward the center toward the +Z direction. It may contain parts.
In addition, the inclination angles of the inner side surface 2211 and the inner contact surface 562 may not be uniform over the entire circumference, and the inner side surface 2211 and the inner contact surface 562 include portions with partially different inclination angles. It may be
Furthermore, the inner surface contact surface 562 of the sealing portion 56 may be formed in a stepped shape having, for example, at least one stepped portion, and the opening 221 may be a stepped hole corresponding to the shape of the inner surface contact surface 562. may

In the above embodiment, the biological information detection sensor 5 is arranged on the inner surface 22B of the back surface portion 22 with the light emitting portions 53A and 53B and the light receiving portion 54 sealed by the sealing portion 56 . However, without being limited to this, the light-emitting section 53 and the light-receiving section 54 may not be sealed by the sealing section 56 when the biological information detection sensor 5 is arranged on the back surface section 22 . That is, the sealing portion 56 is formed so as to seal the light emitting portion 53 and the light receiving portion 54 with a translucent resin after the biological information detection sensor 5 is attached to the inner surface 22B and fixed to the back surface portion 22. may
In this case, for example, after attaching the biological information detection sensor 5 in which the sealing portion 56 is not formed to the back portion 22, a mold corresponding to the shape of the sealing portion 56 is attached to the back portion 22, The sealing portion 56 can be formed by pouring a translucent sealing resin. In this case, if the sealing resin is an adhesive resin, the sealing portion 56 and the inner side surface 2211 can be brought into close contact with each other more effectively. An adhesive sealing material may be employed as a material for the sealing portion 56 formed before the biological information detection sensor 5 is attached to the back portion 22 .

In the above embodiment, the hardness of the sealing portion 56 is assumed to be lower than the hardness of the inner side surface 2211 of the opening 221 . However, not limited to this, the hardness of the sealing portion 56 and the hardness of the inner side surface 2211 may be the same, or the hardness of the sealing portion 56 may be greater than the hardness of the inner side surface 2211 . In particular, when the sealing portion 56 is formed by pouring the sealing resin into the opening 221, either the hardness of the sealing portion 56 or the hardness of the inner side surface 2211 may be greater.

In the above embodiment, the shape of the opening 221 in which the sealing portion 56 is arranged is assumed to be substantially circular when viewed from the +Z direction side. However, the shape of the opening 221 is not limited to this, and can be changed as appropriate. For example, the shape of the opening 221 may be a polygonal shape in plan view, or may be another shape including an arcuate portion. Even in this case, when a sensor having a sealing portion formed in advance is attached to the housing from the -Z direction side, the shape of the sealing portion viewed from the +Z direction side may match the shape of the opening. In this case, if the shape of the opening 221 includes an arc, the stress indicated by the arrow A2 can be uniformly applied to the arc-shaped portion.
In addition, the opening 221 has an inner diameter and an opening area at the contact surface 22A smaller than the inner diameter and opening area at the inner surface 22B, so that the size at the contact surface 22A is smaller than the size at the inner surface 22B. However, the size of the opening 221 on the contact surface 22A may be smaller than the size of the opening 221 on the inner surface 22B by changing other indicators on the contact surface 22A and the inner surface 22B.

In the above-described embodiment, the rear portion 22 has the concave portions 223 and 224 in which the amplifying portion 57 and the connector 58 are arranged. However, the present invention is not limited to this, and the concave portion may be omitted. Further, the biological information detecting sensor 5 may not have the amplifying section 57 . In this case, the amplifier section 57 may be provided on the circuit board 3 .

In the above embodiment, the substrate 51 as the supporting substrate in the biological information detection sensor 5 has the gap forming portion 511 that forms the gap GP in which a part of the connecting member 6 is arranged together with the concave portion 225 . However, it is not limited to this. The substrate 51 may not have the gap forming portion 511 . On the other hand, if the substrate 51 has the gap forming portion 511 , the recess 225 may not be present in the rear portion 22 .

In the above embodiment, the measuring device 1 has the circuit board 3 and the biological information detection sensor 5 , and the circuit board 3 and the biological information detection sensor 5 are electrically connected by the connection member 6 . However, without being limited to this, the sensor unit 52 may be provided on the circuit board 3 . In this case, for example, by providing the sensor unit 52 on the surface of the circuit board 3 on the +Z direction side, it is possible to easily irradiate the living body with the light emitted from the light emitting unit, and the light reflected by the living body can be easily received by the light receiving portion. By providing the sensor section 52 on the circuit board 3, the board 51 can be omitted, so that the measuring apparatus 1 can be further thinned. Note that the position of the battery 4 can be changed as appropriate.

In the above embodiment, the sensor unit 52 has the light emitting units 53A and 53B, which are packaged LED chips, and the light receiving unit 54, which is a packaged PD chip. However, not limited to this, at least one of the light emitting units 53A and 53B may be an unpackaged LED chip, that is, an LED bare chip. Also, the light receiving unit 54 may be an unpackaged PD chip, that is, a PD bare chip.
Moreover, although the substrates of the substrate 51 and the circuit substrate 3 are each rigid substrates, at least one of the substrates may be a flexible printed circuit board (FPC).

In the above embodiment, the living body contact surface 561 is assumed to be a convex curved surface. However, not limited to this, the shape of the surface of the sealing portion on the light emitting direction side may be another shape.
For example, the living body contact surface 561 may include a flat surface or a concave curved surface. When the living body contact surface 561 is a concave curved surface, the light emitted from the light emitting section 53 can be easily diffused to the outside of the sealing section 56 , and the light incident on the sealing section 56 is condensed on the light receiving section 54 . can be made easier.
By changing the shape and curvature of the living body contact surface 561 in this way, the light emitted from the light emitting part 53 can be effectively applied to the living body according to the application of the living body information detection sensor, and the light emitted from the living body can be emitted. light can be efficiently made incident on the light receiving section 54 .

In the above embodiment, the amplification section 57 and the connector 58 are arranged on the mounting surface 51A of the substrate 51 where the sensor section 52 is located. In other words, all components arranged on the substrate 51 are assumed to be arranged on the mounting surface 51A. However, the present invention is not limited to this, and at least one component other than the sensor section 52 among the plurality of components arranged on the substrate 51 may be arranged on the back surface 51B opposite to the mounting surface 51A. good. With this configuration, it is not necessary to form a plurality of recesses 223 and 224 for arranging the amplifying section 57 and the connector 58 in the rear section 22. As a result, the strength of the housing 2 can be increased.

In the above embodiment, the sensor section 52 has two light emitting sections 53A and 53B and one light receiving section . 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. Also, two or more light receiving portions may be provided for one light emitting portion.
Furthermore, a plurality of sets of at least one light emitting unit and at least one light receiving unit may be provided. In this case, each set may be sealed by a plurality of sealing portions. In this case, an opening for exposing the light-emitting portion and the light-receiving portion to the outside may be formed in the rear portion for each pair.
Also, the layout of the light emitting unit and the light receiving unit can be changed as appropriate, and for example, a plurality of light emitting units may be spaced apart in the +X direction.

In the above embodiment, the light shielding portion 55 is formed in a rectangular frame shape surrounding the light receiving portion 54 . However, the shape of the light blocking portion 55 is not limited to this, and may be a ring shape or a polygonal shape other than a rectangle.
Also, the light shielding portion 55 may not have a shape surrounding the light receiving portion 54 . That is, the shape of the light shielding portion can be appropriately changed as long as the light shielding portion is positioned between the light emitting portion and the light receiving portion and can shield the light emitted from the light emitting portion and directly incident on the light receiving portion. 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) can be positioned in a direction different from the direction from the light-receiving unit to the light-emitting unit. ) can be omitted. Moreover, a gap may be present in a part of the light shielding portion, or it may be divided into a plurality of shielding portions (light shielding portions).
Furthermore, the light shielding part 55 does not necessarily have to be sealed by the sealing part 56 together with the light emitting part 53 and the light receiving part 54, and the light shielding part may be provided outside the sealing part. Also, as described above, part of the light blocking portion 55 may be positioned outside the sealing portion 56 . Furthermore, the light shielding part may be omitted.

In the above-described embodiment, the position of the tip of the light shielding part 55 on the +Z direction side (projecting direction side from the substrate 51 ) coincides with the position of the living body contact surface 561 . However, not limited to this, the position of the tip portion of the light shielding portion 55 can be changed as appropriate. It should be noted that, as described above, the tip of the light shielding portion is preferably located on the +Z direction side (light emission side) from the light emitting portion.

In the above embodiment, the circuit board 3 is provided with an acceleration sensor for detecting acceleration acting on the measuring device. However, the present invention is not limited to this, and the circuit board 3 may not be provided with the acceleration sensor. For example, another sensor such as an acceleration sensor may be provided on the substrate 51 of the biological information detection sensor. Furthermore, the biological information measuring device may include a position sensor (for example, a GPS receiver) capable of measuring position information.

In the above embodiment, the biological information detection sensor 5 detects a pulse wave, which is one of the biological information, and the circuit board 3 detects other biological information based on the pulse wave signal output from the biological information detection sensor 5. It was assumed that the pulse rate, which is one of the That is, the biological information measuring device 1 described above measures the pulse wave and the pulse rate as biological information. However, the biological information that can be detected and measured by the biological information measuring device of the present invention is not limited to the pulse wave and pulse rate. For example, HRV (Heart Rate Variability), RRI (R-R Interval: pulse interval), blood pressure, blood sugar level, amount of activity, calorie consumption, maximum oxygen uptake (VO2max), etc. You may apply this invention to a measuring apparatus.

DESCRIPTION OF SYMBOLS 1... Biological information measuring apparatus 2... Housing 22... Back part 22A... Contact surface 22B... Inner surface 221... Opening part 2211... Inner side surface 223... Recessed part 3... Circuit board 5... Biological information detection sensor , 51... Substrate (supporting substrate), 51A... Mounting surface, 51B... Back surface, 511... Gap forming part, 52... Sensor part, 53 (53A, 53B)... Light emitting part, 54... Light receiving part, 56... Sealing part, 561... Living body contact surface, 562... Inner surface contact surface, 57... Amplifier, 58... Connector, 6... Connection member, GP... Gap.

Claims (7)

a biometric information detection sensor that detects biometric information of a living body;
and a housing that houses the biological information detection sensor,
The biological information detection sensor is
a light emitting unit that irradiates the living body with light;
a light receiving unit that receives reflected light from the living body;
a sealing portion that is made of a translucent member that transmits the reflected light and that seals the light emitting portion and the light receiving portion;
a support substrate that supports the light emitting unit, the light receiving unit, and the sealing unit;
The housing is
a contact surface that contacts the living body;
an inner surface in contact with the support substrate;
an opening that penetrates from the contact surface to the inner surface and that the sealing portion and the inner side surface are in contact;
the size of the opening in the contact surface is smaller than the size of the opening in the inner surface;
The biological information measuring device , wherein an inner side surface of the opening is inclined in a direction toward the center of the opening toward the contact surface side . In the biological information measuring device according to claim 1 ,
The biological information measuring device, wherein the hardness of the sealing portion is smaller than the hardness of the inner side surface of the opening. In the biological information measuring device according to claim 1 or claim 2 ,
The biological information measuring device, wherein the inner diameter of the opening in the contact surface is smaller than the inner diameter of the opening in the inner surface. In the biological information measuring device according to any one of claims 1 to 3 ,
A biological information measuring device, wherein an opening area of the opening on the contact surface is smaller than an opening area of the opening on the inner surface. In the biological information measuring device according to any one of claims 1 to 4 ,
The biological information detection sensor includes a light shielding portion positioned between the light emitting portion and the light receiving portion,
The biological information measuring device, wherein the sealing section seals the light emitting section, the light receiving section, and the light shielding section. In the biological information measuring device according to any one of claims 1 to 5 ,
The biological information detection sensor includes an amplifier that amplifies the signal from the light receiving unit,
The amplifying section is provided on a surface of the supporting substrate on which the light emitting section, the light receiving section and the sealing section are located,
The biological information measuring device, wherein the housing has a concave portion corresponding to the amplifying portion on the inner surface. In the biological information measuring device according to any one of claims 1 to 6 ,
a circuit board that determines the biometric information based on a signal from the biometric information detection sensor;
A connection member that connects the biological information detection sensor and the circuit board,
The biological information measuring device, wherein the support substrate has a recessed gap forming portion that forms a gap between the support substrate and the inner surface in which a part of the connection member is arranged.

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