JP7124377B2 - 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

However, in the pulse wave sensor described in Patent Document 1, the opening surface of the case is only blocked by the light-transmitting plate, and liquid and dust may enter the interior from the gap between the case and the light-transmitting plate. There was a problem that there is

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 waterproofness and dustproofness.

A biological information measuring device according to an aspect of the present invention includes a housing having an opening in a contact surface that contacts a living body; a sensor unit arranged in the opening when viewed in plan from a normal direction of the contact surface; wherein the sensor unit includes a light emitting unit that irradiates the living body with light, a light receiving unit that receives light reflected from the living body, and a sealing unit that seals the light emitting unit and the light receiving unit. The sealing portion has a side surface portion that contacts the inner side surface of the opening, and one of the inner side surface and the side surface portion is provided with a protrusion.

According to such a configuration, the protrusion provided on one of the inner side surface of the housing and the side surface of the sealing portion causes the inner side surface of the opening and the side portion of the sealing portion disposed in the opening to move. You can close the gap between Therefore, it is possible to prevent liquid and dust from entering the housing through the gap. Therefore, the biological information measurement device can be made more waterproof and dustproof than when there is no protrusion.

In the aspect described above, it is preferable that the projecting portion is provided on the side surface portion, and the housing has a recess at a position corresponding to the projecting portion on the inner side surface.
According to such a configuration, by inserting the projecting portion into the recessed portion, it is possible to close the gap through which liquid and dust may enter. Therefore, it is possible to improve the waterproofness and dustproofness of the biological information measuring device. In addition, the concave portion can increase the contact area between the inner side surface of the opening and the side surface of the sealing portion, and the insertion of the protrusion into the concave portion can prevent the sealing portion from coming out of the opening.

In the aspect described above, it is preferable that the hardness of the protruding portion is lower than the hardness of the inner side surface.
A low hardness means a low hardness, and a high hardness means a high hardness.
According to such a configuration, the protrusion can be deformed and arranged in the recess, thereby allowing the protrusion and the recess to be brought into close contact with each other. Therefore, the gap can be reliably closed, and the waterproofness and dustproofness of the biological information measuring device can be reliably improved.
Further, even when the sealing portion is inserted and placed in the opening, the protrusion can be deformed when the sealing portion is inserted into the opening, so that the sealing portion can be reliably placed in the opening.

In the aspect described above, it is preferable that the protruding portion is provided on the side surface portion and is in contact with the contact surface.
According to such a configuration, the projecting portion comes into contact with the contact surface so as to cover the gap between the side surface portion of the sealing portion and the inner edge of the opening. and dust can be suppressed from entering the housing. Therefore, it is possible to improve the waterproofness and dustproofness of the biological information measuring device.

In the aspect described above, the protrusion preferably has a surface that is continuous with the contact surface.
According to such a configuration, when the biological information measuring device is worn so that the contact surface and the living body are in contact with each other, not only the contact surface but also the continuous surface comes into contact with the living body, leaving traces on the living body. can be suppressed.

In the aspect described above, the housing may have a housing-side projecting portion that projects from the inner side surface toward the sealing portion, and the side surface portion may have a recess at a position corresponding to the housing-side projecting portion. preferable.
According to such a configuration, the contact area between the inner side surface of the opening and the side surface of the sealing portion can be increased in the same manner as described above by inserting the housing-side projecting portion into the recess. In addition, since the housing-side projecting portion is positioned on the inner side surface of the opening, the opening has a shape like a stepped hole. Therefore, it is possible to prevent the sealing portion arranged in the opening from coming off.

In the aspect described above, the shape of each of the opening portion and the sealing portion preferably includes an arcuate portion in plan view from the normal direction of the contact surface.
According to such a configuration, for example, when the biological information measuring device is mounted so that the contact surface and the living body are in contact with each other, and a stress is applied to expand the diameter of the sealing portion in plan view, the shape of the arc is formed. At the site, the sides of the seal can evenly apply pressure to the inner sides of the opening. Therefore, the side surface portion and the inner side surface can be brought into close contact without a gap.

BRIEF DESCRIPTION OF THE DRAWINGS 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 back part and biometric information detection sensor in the said 1st Embodiment. The perspective view which shows the biometric information detection sensor in the said 1st Embodiment. The perspective view which shows arrangement|positioning of the biometric information detection sensor in the back part in the said 1st Embodiment. Sectional drawing which shows the back part and biometric information detection sensor in the said 1st Embodiment. Sectional drawing which expands and shows a part of back part and biological information detection sensor in the said 1st Embodiment. Sectional drawing which shows the back part and biological information detection sensor with which the biological information measuring apparatus which concerns on 2nd Embodiment of this invention is provided. Sectional drawing which expands and shows a part of back part and biometric information detection sensor in the said 2nd Embodiment. The figure which shows the formation process of the sealing part in the said 2nd Embodiment.

[First embodiment]
A first 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 1A according to this embodiment.
A biological information measuring device (hereinafter sometimes abbreviated as a measuring device) 1A according to the present embodiment is a wearable device that is worn on a user's body (living body) and used, and measures the user's biological information. Specifically, the measuring device 1A 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 1A, which will be described later in detail, has one of the characteristics in that it has a configuration that enhances waterproofness and dustproofness.
The measuring device 1A, as shown in FIG. 1, includes a housing 2A and bands BN1 and BN2. The housing 2A includes a back portion 22 that contacts the user's body when the measuring device 1A is worn, and a front portion 21 that has a display window for allowing the user to visually recognize the measured biological information.

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

In the following description, the direction from the front portion 21 to the rear portion 22 of the housing 2A 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. Also, when the measuring apparatus 1A is viewed from the -Z direction side 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 by a light-emitting portion 53 that constitutes a sensor portion 52A of the biological information detection sensor 5A, 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 "planar viewing", except when the observation direction is specified.

[Housing configuration]
The housing 2A is configured by combining a front case and a rear case, and has a front portion 21, a rear portion 22 (see FIG. 2), and a side portion 23 connecting the front portion 21 and the rear portion 22 together.
The front part 21 is configured by a front case. The front part 21 has a translucent cover 211 for allowing a user wearing the measuring device 1A to visually recognize the display part DP provided in the housing 2A.
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 1A.
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 comes into contact with the user's body when the measuring device 1A 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. At the center of the contact surface 22A, the sensor portion 52A of the biological information detection sensor 5A housed in the housing 2A is exposed to the outside, and a substantially circular opening through which the light emitted from the light emitting portion 53 of the sensor portion 52A passes. A portion 221 is formed. The biological information detection sensor 5A and the opening 221 will be detailed later.

[Internal structure of housing]
FIG. 3 is a diagram showing the internal configuration of the measuring apparatus 1A, and more specifically, a cross section parallel to the YZ plane and passing through the center of the measuring apparatus 1A viewed from the -X direction side.
The measuring device 1A has a housing 2A and a display section DP, as well as a circuit board 3, a battery 4, a biological information detection sensor 5A and a connection member 6, which are accommodated in the housing 2A, respectively, as shown in FIG.
A battery 4 supplies power for operating the measuring device 1A. 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 5A. 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 for controlling the entire measurement apparatus 1A, 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 1A, and outputs a signal indicating the detected acceleration to the control circuit as a body motion signal indicating 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 5A 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 5A 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 1A. In addition, the storage circuit stores detection results from the biological information detection sensor 5A and the acceleration sensor, and analysis results from 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 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 5A 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 52A and the rear portion 22 of the biological information detection sensor 5A as seen from the +Z direction side. Moreover, FIG. 5 is the perspective view which looked at 5 A of biometric information detection sensors from the +Z direction side. 4 and 5, the illustration of the sealing portion 56A constituting the sensor portion 52A is omitted 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 52A. there is
The biological information detection sensor 5A is a biological information detection sensor used in a biological information measurement device that measures biological information, exemplified by the measurement device 1A. 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 5A has a substrate 51, a sensor section 52A, an amplifier section 57 and a connector 58, as shown in FIGS.

[Substrate configuration]
The substrate 51 is a supporting substrate that supports a sensor section 52A, an amplifying section 57, and a connector 58 provided on a mounting surface 51A, which is a 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 on the mounting surface 51A on the +Y direction side with respect to the sensor unit 52A, amplifies a signal (pulse wave signal) input from the light receiving unit 54 described later of the sensor unit 52A, 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 52A, 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 5A is attached to the back portion 22, the sensor portion 52A is arranged inside the opening 221 in plan view (as seen from the normal direction of the contact surface 22A of the back portion 22). The sensor unit 52A 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 indicating biological information (for example, a pulse wave signal). As shown in FIGS. 4 and 5, the sensor section 52A has a light-emitting section 53 (53A, 53B), a light-receiving section 54 and a light-shielding section 55, as well as a sealing section 56A (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 5A 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 5A. Moreover, FIG. 7 is a figure which shows the cross section along YZ plane of the biometric information detection sensor 5A and the back surface part 22 before being attached to the back surface part 22. As shown in FIG.
As shown in FIGS. 6 and 7, the sealing portion 56A seals the light emitting portion 53, the light receiving portion 54 and the light shielding portion 55 to the mounting surface 51A of the substrate 51, and the light emitting portion 53, the light receiving portion 54 and the light shielding portion 56A are sealed. protect the part 55; The sealing portion 56A is exposed to the outside of the housing 2A through an opening 221 formed in the back portion 22. As shown in FIG. That is, the sealing portion 56A 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 56A 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 2A through the sealing portion 56A, and the light received by the light receiving portion 54 passes through the sealing portion 56A. 54.
It should be noted that sealing does not necessarily mean that the entire sealing target, which is the target to be sealed, is wrapped in the sealing portion 56A. For example, if the sealing portion 56A encloses the light-emitting portion 53 and the light-receiving portion 54, which are objects to be sealed, in the sealing portion 56A, part of the light-shielding portion 55, which is also to be sealed, is part of the sealing portion 56A. May be exposed to the outside. The same applies to a sealing portion 56B, which will be described later.
Further, in the present embodiment, the hardness of the sealing portion 56A formed of the sealing resin is the hardness of the inner side surface 2211 of the opening 221 in which the sealing portion 56A is arranged, that is, the hardness of the back portion 22. less than hardness.

Such a sealing portion 56A is a surface on the +Z direction side, and has a living body contact surface 561 that comes into contact with the living body when the measuring device 1A 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 section 53 is mainly emitted to the outside of the sealing section 56A. 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 56A.
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.

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 end portion 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 − 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 directly from the light emitting portion 53 to the light receiving portion 54 without passing through the living body.

As shown in FIGS. 6 and 7, the sealing portion 56A is formed in a columnar shape having a convex curved living body contact surface 561, and the biological information detection sensor 5A is attached to the back portion 22 from the −Z direction side. It has a side portion 562 that faces and contacts the inner side surface 2211 of the opening 221 when it is closed.
The side surface portion 562 is an outer surface in the circumferential direction around the center axis of the sealing portion 56A along the +Z direction. Projecting portions 563 (5631, 5632) are provided on the side portion 562 so as to project from the side portion 562 to the outside in the radial direction of the sealing portion 56A.

As shown in FIG. 7, the projecting portion 563 is formed in an annular shape over the entire circumference of the side surface portion 562 along the circumferential direction around the center axis along the +Z direction of the sealing portion 56A. It has a first protrusion 5631 and a second protrusion 5632 .
The first projecting portion 5631 and the second projecting portion 5632 are positioned substantially in the center of the side surface portion 562 in the +Z direction, and the first projecting portion 5631 is positioned on the +Z direction side with respect to the second projecting portion 5632 . The first projecting portion 5631 and the second projecting portion 5632 are formed on the inner side surface 2211 of the opening 221 when the sealing portion 56A is inserted into the opening 221 from the −Z direction side toward the +Z direction side. It is inserted into the recess 2212 and fits into the recess 2212 .

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

The inner surface 22B contacts the substrate 51 of the biological information detection sensor 5A to support the biological information detection sensor 5A. The substrate 51 supported on the inner surface 22B is fixed to the housing 2A (for example, the inner surface 22B) by a fixing member such as a screw (not shown) or an adhesive.
The back surface portion 22 is formed with an opening 221 that exposes the sensor portion 52A to the outside of the housing 2A. First concave portions that are recessed in the +Z direction from the inner surface 22B are formed in 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 22B 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 detecting sensor 5A is output to the circuit board 3 via the connecting member 6. As shown in FIG.

An inner side surface 2211 of the opening 221 is formed with a recessed portion 2212 in which the protrusion 563 (the first protrusion 5631 and the second protrusion 5632) is fitted over the entire circumference of the inner side surface 2211 . That is, the housing 2A has a concave portion 2212 into which the projecting portion 563 is inserted at a position corresponding to the projecting portion 563 on the inner side surface 2211 .
The recessed portion 2212 is formed substantially in the center of the inner side surface 2211 in the +Z direction along the circumferential direction about the central axis of the opening 221 along the +Z direction. The depth of the concave portion 2212 is smaller than the dimension from the side surface portion 562 to the tip of the projecting portion 563 , that is, the projecting dimension of the projecting portion 563 .

FIG. 8 is a cross-sectional view showing an enlarged part of the biological information detection sensor 5A and the rear surface portion 22 with the biological information detection sensor 5A attached to the rear surface portion 22. As shown in FIG. In addition, FIG. 8 is a figure which shows the cross section along YZ plane of 5 A of biometric information detection sensors, and the back surface part 22. As shown in FIG.
When the biological information detection sensor 5A is attached along the +Z direction from the −Z direction side to the back surface portion 22, as shown in FIG. inserted.
At this time, the protruding portions 563 (5631, 5632) positioned on the side surface portion 562 of the sealing portion 56A are inserted and fitted into the recessed portions 2212 provided on the inner side surface 2211 of the opening portion 221 .

Here, the outer diameter dimension of the sealing portion 56A is set according to the inner diameter dimension of the opening portion 221 after considering the clearance for the side surface portion 562 to contact the inner side surface 2211 . Also, as described above, the projection dimension of the projection 563 is larger than the depth dimension of the recess 2212 .
Therefore, when the sealing portion 56A is inserted into the opening portion 221, the side portion 562 and the inner side surface 2211 come into contact with each other. 8 is deformed in the recess 2212, and the tip of the protrusion 563 is in close contact with the bottom 2213, which is a portion of the recess 2212 located in the depth direction.
That is, the protruding portion 563 protrudes outward (radially outward) from the inner edge of the opening 221 in the sealing portion 56A in plan view. The protruding portion 563 is inserted into the recess 2212 formed in the inner side surface 2211 and comes into close contact with the recess 2212 .
The inner edge of the opening 221 means the edge provided on the inner side surface 2211 of the opening 221 and closest to the central axis of the opening 221 along the +Z direction. Therefore, in this embodiment, the inner side surface 2211 of the opening 221 serves as the inner edge of the opening 221 .

As described above, when the protrusion 563 is inserted into the recess 2212, the tip of the protrusion 563 (5631, 5632) abuts against the bottom 2213 and presses in the direction opposite to the direction of protrusion from the side surface 562. be transformed. If the volume of the projecting portion 563 is larger than the volume of the recessed portion 2212, the projecting portion 563 and the bottom portion 2213 are in close contact with each other. Gaps are likely to occur.
On the other hand, the projecting portion 563 is composed of a first projecting portion 5631 and a second projecting portion 5632 that are separated from each other in the +Z direction. Accordingly, it is possible to secure a space between the first projecting portion 5631 and the second projecting portion 5632 so that they are deformed. As a result, the protruding portion 563 is positioned within the recessed portion 2212, and the formation of a gap between the side surface portion 562 of the sealing portion 56A and the inner side surface 2211 of the opening portion 221 can be suppressed while they are brought into close contact with each other.

The projecting portion 563 is formed over the entire circumference of the side surface portion 562 , and the recessed portion 2212 is formed over the entire circumference of the inner side surface 2211 . This can prevent liquid and dust from entering the housing 2A from the contact surface 22A through between the side surface portion 562 and the inner side surface 2211 . Therefore, the waterproofness and dustproofness of the measuring device 1A can be enhanced.

[Effect of the first embodiment]
1 A of biological information measuring apparatuses which concern on this embodiment demonstrated above have the following effects.
The measuring device 1A includes a housing 2A having a back portion 22, and a sensor portion 52A arranged in an opening 221 when viewed from the normal direction of the contact surface 22A (that is, in plan view). The sensor section 52A has a light emitting section 53 that irradiates the living body with light, a light receiving section 54 that receives reflected light from the living body, and a sealing section 56A that seals the light emitting section 53 and the light receiving section 54 . The sealing portion 56A has a side portion 562 that contacts the inner side surface 2211 of the opening 221, and the side portion 562 is provided with a projecting portion 563. As shown in FIG.
According to this, the gap between the inner side surface 2211 and the side surface portion 562 can be closed by the protrusion 563 coming into contact with the inner side surface 2211 . Therefore, it is possible to prevent liquid and dust from entering the housing 2A through the gap. Therefore, the waterproofness and dustproofness of the measuring device 1A can be improved as compared with the case where the projecting portion 563 is not provided.

The rear portion 22 of the housing 2A has a recess 2212 at a position corresponding to the projection 563 on the inner side surface 2211 of the opening 221. As shown in FIG. According to this, by inserting the projecting portion 563 into the recessed portion 2212, it is possible to block the above-described gap through which liquid and dust may enter. Therefore, the waterproofness and dustproofness of the measuring device 1A can be enhanced. In addition, the contact area between the inner side surface 2211 and the side surface portion 562 can be increased by the recessed portion 2212, and the sealing portion 56A can be prevented from coming off from the opening portion 221. FIG.

The hardness of the protruding portion 563 is lower than the hardness of the inner side surface 2211 of the opening 221 , that is, the hardness of the back surface portion 22 forming the housing 2 . Accordingly, when the sealing portion 56A is inserted into the opening 221, the protrusion 563 can be easily deformed. can be in close contact with the recess 2212). Therefore, the gap can be reliably closed, and the waterproofness and dustproofness of the measuring device 1A can be enhanced. Further, when the sealing portion 56A is inserted into the opening portion 221 from the −Z direction side to the +Z direction side, the deformation of the projecting portion 563 ensures that the sealing portion 56A is securely inserted into the opening portion 221. can be placed in

Each of the opening 221 and the sealing portion 56 has a circular shape including an arc-shaped portion in plan view. According to this, when the measuring device 1A is attached so that the contact surface 22A and the living body are in contact with each other, and a stress is applied to expand the diameter of the sealing portion 56 in a plan view, the side surface portion 562 is moved to the inner side surface 2211. Apply pressure evenly. Therefore, the side surface portion 562 and the inner side surface 2211 can be brought into close contact without a gap.

[Second embodiment]
Next, a second embodiment of the 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 in the configuration for enhancing waterproofness and dustproofness. In the following description, the same or substantially the same parts as those already described are denoted by the same reference numerals, and the description thereof is omitted.

[Schematic configuration of biological information measuring device]
FIG. 9 is a cross-sectional view along the YZ plane of the rear surface portion 2B2 of the housing 2B provided in the biological information measurement device 1B according to the present embodiment and the biological information detection sensor 5B attached to the rear surface portion 2B2.
The biological information measuring device 1B according to the present embodiment, like the measuring device 1A, is a wearable device that is used by being worn on the user's body (biological body), and the user's biological information (for example, pulse wave and pulse rate). to measure. As shown in FIG. 9, the measuring device 1B has the same configuration and functions as the measuring device 1A except that it has a housing 2B and a biological information detecting sensor 5B instead of the housing 2A and the biological information detecting sensor 5A.

[Housing configuration]
The housing 2B has a rear portion 2B2 instead of the rear portion 22. As shown in FIG. That is, although detailed illustration is omitted, the housing 2B has a front portion 21 located on the −Z direction side, a back portion 2B2 located on the +Z direction side, and a side portion 23 connecting the front portion 21 and the back portion 2B2. , have
The rear portion 2B2 has the same configuration and functions as the rear portion 22 except that it has an opening 226 instead of the opening 221. As shown in FIG. That is, the back surface portion 2B2 has an opening 226 and recesses 223 to 225 in addition to the contact surface 22A and the inner surface 22B.

FIG. 10 is a cross-sectional view showing an enlarged part of the back portion 2B2 and the biological information detection sensor 5B. Note that FIG. 10 also shows a cross section along the YZ plane of the back portion 2B2 and the biological information detection sensor 5B.
As shown in FIGS. 9 and 10, the opening 226 is located in the center of the contact surface 22A, which is the +Z direction side surface of the back surface portion 2B2 and contacts the living body, so as to pass through the back surface portion 2B2 along the +Z direction. is formed in In the opening 226, the sensor portion 52B that constitutes the biological information detection sensor 5B in plan view is arranged, and the opening 226 emits light from the light emitting portion 53 that is sealed by the sealing portion 56B that constitutes the sensor portion 52B. The light received by the light receiving portion 54 passes through.

Here, as shown in FIG. 10, at the +Z direction side end of the inner side surface 2261 of the opening 226, there is provided a housing-side projecting portion projecting toward the center of the opening 226, that is, toward the sealing portion 56B. A protrusion 2262 is provided integrally with the inner side surface 2261 .
The projecting portion 2262 is formed along the entire circumference of the inner side surface 2261 along the circumferential direction around the center axis along the +Z direction of the opening 226 . For this reason, the opening 226 is formed in a shape like a stepped hole in which the inner diameter dimension at the end on the +Z direction side is smaller than the inner diameter dimension at the end on the -Z direction side. In other words, the opening 226 is shaped like a stepped hole in which the inner diameter of the contact surface 22A is smaller than the inner diameter of the inner surface 22B.
The shape of the opening 226 in plan view (when viewed from the normal direction of the contact surface 22A) is a circular shape including an arc-shaped portion, and the opening when viewed from the -Z direction side. The shape of the portion 226 is also the same. An inner edge 226E of the opening 226 is an edge of the projection 2262 on the center side of the opening 226 .

[Configuration of biological information detection sensor]
The biometric information detection sensor 5B has the same configuration as the biometric information detection sensor 5A, except that it has a sensor section 52B instead of the sensor section 52A. The sensor section 52B has the same configuration as the sensor section 52A except that it has a sealing section 56B instead of the sealing section 56A. That is, the sensor section 52B has a light emitting section 53 (53A, 53B), a light receiving section 54, a light blocking section 55 and a sealing section 56B.
Like the sealing portion 56A, the sealing portion 56B is made of a light-transmitting member made of a light-transmitting sealing material. sealed to The sealing portion 56B has a living body contact surface 561 that is a convex curved surface that protrudes in the +Z direction.

Such a sealing portion 56B is arranged inside the opening portion 226 when the biological information detection sensor 5B is attached to the back portion 2B2. In this state, the side surface portion 56B2, which is the outer surface of the sealing portion 56B in the circumferential direction around the central axis of the sealing portion 56B along the +Z direction, contacts the inner side surface 2261 of the opening 226. Also, the projecting portion 2262 is inserted so as to be buried in the sealing portion 56B. That is, the side surface portion 56B2 of the sealing portion 56B corresponds to the projecting portion 56B3, which is located on the +Z direction side with respect to the projecting portion 2262 and projects outward from the inner edge 226E of the opening 226, and the projecting portion 2262. and a concave portion 56B5 into which the projecting portion 2262 is inserted (fitted). The protruding portion 56B3 protrudes from the side surface portion 56B2 to come into contact with the contact surface 22A and covers the protruding portion 2262 on the +Z direction side. Therefore, the surface 56B4 on the +Z direction side of the projecting portion 56B3 is a surface that is continuous with the contact surface 22A. That is, the projecting portion 56B3 has a surface 56B4 that is continuous with the contact surface 22A.
Such projecting portion 56B3 and recessed portion 56B5 are formed along the entire circumference of the sealing portion 56B along the circumferential direction around the center axis along the +Z direction of the sealing portion 56B.

[Step of forming sealing portion]
11A and 11B are diagrams illustrating the process of forming the sealing portion 56B.
The above-described sealing portion 56B can be formed through, for example, the following forming steps.
First, as shown in the first stage of FIG. 11, the biological information detection sensor 5B without the sealing portion 56B is arranged on the inner surface 22B of the back portion 2B2. At this time, the biological information detection sensor 5B is arranged on the inner surface 22B so that the light emitting portion 53, the light receiving portion 54, and the light shielding portion 55 constituting the sensor portion 52B are positioned within the opening portion 226 in plan view. Then, the biological information detection sensor 5B is fixed to the rear surface portion 2B2 by the fixing member, adhesive, or the like.

Next, as shown in the second stage of FIG. 11, a sealing material is injected into the opening 226 and solidified to form the first constituent portion 56P1 constituting the sealing portion 56B in the opening 226. . The first component portion 56P1 is a portion that contacts the protrusion 2262 located on the inner side surface 2261 of the opening 226, and in the present embodiment, the +Z direction side surface of the protrusion portion 2262, that is, The first component portion 56P1 is formed so as to be substantially flush with the contact surface 22A. As a result, the side surface portion 56B2 of the sealing portion 56B comes into contact with the inner side surface 2261 of the opening portion 226. As shown in FIG.
As the sealing material for forming the first constituent portion 56P1, a sealing material having not only translucency but also adhesiveness may be employed. In this case, the first component portion 56P1 contacts and adheres to the inner side surface 2261 .

After that, as shown in the third row of FIG. 11, a second component portion 56P2 having a living body contact surface 561 that is a convex curved surface is formed, thereby forming a sealing portion 56B.
Specifically, in the step of forming the second component portion 56P2, a mold (not shown) corresponding to the living body contact surface 561 is arranged so as to cover the opening 226, and a sealing material is injected into the mold for sealing. A second component portion 56P2, which is a portion on the +Z direction side of the first component portion 56P1 that configures the portion 56B, is formed. As a result, the first component portion 56P1 and the second component portion 56P2 are integrated to form the sealing portion 56B.

At this time, the second constituent portion 56P2 is formed so that a portion of the projecting portion 2262 is covered with the sealing material in plan view. As a result, the recess 56B5 is formed in the sealing portion 56B, and the projecting portion 56B3 positioned outside the inner edge 226E of the opening 226 and in contact with the contact surface 22A is formed. Therefore, liquid and dust are prevented from entering the housing 2B through the space between the inner side surface 2261 of the opening 226 and the sealing portion 56B. That is, the waterproofness and dustproofness of the measuring device 1B are enhanced.
The sealing material forming the second component portion 56P2 may be the same as or different from the sealing material forming the first component portion 56P1. For example, the sealing material forming the first component portion 56P1 and the sealing material forming the second component portion 56P2 may have different refractive indices.
The hardness of the sealing portion 56B (particularly the protruding portion 56B3) formed in the above formation process may be greater than, equal to or less than the hardness of the back surface portion 2B2 forming the inner side surface 2261.

[Effect of Second Embodiment]
The measuring device 1B according to the present embodiment described above can achieve the same effects as the measuring device 1A described above, as well as the following effects.
That is, the measuring device 1B has a housing 2B and a sensor portion 52B disposed in an opening 226 formed in the contact surface 22A in plan view from the normal direction of the contact surface 22A of the back surface portion 2B2 constituting the housing 2B. And prepare. The sensor section 52B has a light emitting section 53 that irradiates the living body with light, a light receiving section 54 that receives reflected light from the living body, and a sealing section 56B that seals the light emitting section 53 and the light receiving section 54 . The sealing portion 56B has a side portion 56B2 that contacts the inner side surface 2261 of the opening 226, and the side portion 56B2 is provided with a projecting portion 56B3. According to this, the gap between the inner side surface 2261 and the side surface portion 56B2 can be closed by the projecting portion 56B3. Therefore, it is possible to prevent liquid and dust from entering the housing 2B from the contact surface 22A side through the gap. Therefore, the waterproofness and dustproofness of the measuring device 1B can be improved as compared with the case where there is no protrusion 56B3.

A projecting portion 56B3 provided on the side surface portion 56B2 contacts the contact surface 22A of the rear surface portion 2B2. According to this, the protruding portion 56B3 is provided so as to cover the gap between the sealing portion 56B and the inner side surface 2261 (inner edge 226E) of the opening 226 in a plan view, so that the liquid flows from the contact surface 22A side. It is possible to suppress the intrusion of dirt and dust into the housing 2B. Therefore, the waterproofness and dustproofness of the measuring device 1B can be improved.

The projecting portion 56B3 has a surface 56B4 that is continuous with the contact surface 22A. According to this, when the measuring device 1B is worn so that the contact surface 22A and the living body are in contact with each other, not only the contact surface 22A but also the surface 56B4 and the living body contact surface 561 continuously come into contact with the living body. , can suppress leaving traces on the living body.

The rear surface portion 2B2 has a projecting portion 2262 as a housing-side projecting portion that projects from the inner side surface 2261 toward the sealing portion 56B, and the side surface portion 56B2 has a recessed portion 56B5 at a position corresponding to the projecting portion 2262. Accordingly, the contact area between the inner side surface 2261 and the side surface portion 56B2 can be increased by inserting the projecting portion 2262 into the recess portion 56B5. In addition, since the protruding portion 2262 is positioned on the inner side surface 2261, the opening portion 226 has a stepped hole-like shape with a smaller inner diameter at the contact surface 22A than at the inner surface 22B. Therefore, it is possible to prevent the sealing portion 56B arranged in the opening 226 from coming off.

[Modification of Second Embodiment]
In the measurement apparatus 1B, the sealing portion 56B is configured to have a first component portion 56P1 and a second component portion 56P2 which are separately formed. However, the present invention is not limited to this, and the sealing portion 56B may be formed at once by arranging the mold according to the opening 226 and then pouring the sealing material into the opening 226 . That is, the sealing portion 56B may be integrally formed.
Also, the biological information detection sensor 5B having the first component portion 56P1 formed thereon may be arranged in the placement portion 222 such that the first component portion 56P1 is positioned within the opening 226, and then the second component portion 56P2 may be formed. may form the sealing portion 56B. In this case, the hardness of the first component portion 56P1 is preferably smaller than the hardness of the inner side surface 2261 (the hardness of the back surface portion 2B2), but may be the same or larger.

Furthermore, instead of forming the second component portion 56P2 by pouring the sealing material into a mold, the second component portion 56P2 that is separately manufactured can be attached to the first component portion 56P1 located in the opening 226 by adhesion or the like. may form the sealing portion 56B.
Further, if the protruding portion 56B3 of the sealing portion 56B is positioned outside the inner side surface 2261 (inner edge 226E) of the opening 226 and is in contact with (closely attached to) the contact surface 22A, the sealing portion 56B and the inner side surface 2261 of the opening 226 do not necessarily have to be in contact with each other.

[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.
For example, the configuration shown in the first embodiment and the configuration shown in the second embodiment may be combined. As an example, the biological information measuring device may be configured such that protrusions 563, 56B3 and a recess 56B5 are provided on the side surface of the sealing portion, and recesses 2212 and a protrusion 2262 are provided on the inner side surface of the opening. good.

In each of the above-described embodiments, the side surfaces 562 and 56B2 of the sealing portions 56A and 56B are provided with the projecting portions 563 and 56B3, and the projecting portions 563 and 56B3 form the side surfaces 562 and 56B2 and the inner side surfaces of the openings 221 and 226. 2211 and 2261 are closed. However, the present invention is not limited to this, and a protrusion may be provided on the inner side surface of the opening. In this case, the hardness of the projecting portion may be greater or less than that of the sealing portion. Further, in this case, recesses may be provided at positions corresponding to the protrusions on the side surface of the sealing portion. When such a recess is provided, it is preferable that the projection dimension of the protrusion is larger than the depth dimension of the recess.

In the first embodiment described above, the biometric information detection sensor 5A having the sealing portion 56A provided with the protrusion 563 in advance is arranged on the inner surface 22B so that the protrusion 563 is inserted into the recess 2212 . However, not limited to this, the sealing portion 56A does not have to be formed in advance on the biological information detection sensor 5A. For example, the biological information detection sensor 5A without the sealing portion 56A is combined with the back portion 22, and a sealing material is poured into a mold arranged according to the opening 221 to form the sealing portion 56A. may If a resin having not only translucency but also adhesiveness is employed as the sealing material, the side surface portion 562 of the sealing portion 56A and the inner side surface 2211 can be brought into close contact with each other more effectively. The adhesive sealing material is used for the sealing portions 56A and 56B (first component portion 56P1) formed before the biological information detecting sensors 5A and 5B are attached to the back portions 22 and 2B2, as described above. ) may be used as a material for

In the first embodiment described above, the protruding portion 563 inserted into the recessed portion 2212 is positioned at the center of the side portion 562 in the +Z direction. However, the present invention is not limited to this, and the recess 2212 and the protrusion 563 need only be in close contact with each other to the extent that liquid and dust can be prevented from entering, and the positions of the recess 2212 and the protrusion 563 in the +Z direction can be changed as appropriate.
Further, if the protruding portion 563 can maintain a state of being in close contact with the inner side surface 2211 of the opening 221 , the recess 2212 may not be provided on the inner side surface 2211 of the opening 221 .
Furthermore, if the inner side surface 2211 is elastically deformed according to the shape of the protruding portion 563 and the inner side surface 2211 and the protruding portion 563 are in close contact with each other, the hardness of the protruding portion 563 is not necessarily higher than that of the inner side surface 2211. It doesn't have to be small.
In addition, the protrusion 563 may have only one of the first protrusion 5631 and the second protrusion 5632, or may have more protrusions.

In each of the embodiments described above, the projecting portions 563 and 56B3 are formed over the entire circumference of the sealing portions 56A and 56B. However, not limited to this, if the inner side surfaces 2211 and 2261 of the openings 221 and 226 and the side surfaces 562 and 56B2 of the sealing portions 56A and 56B can be in close contact with each other, the protruding portions 563 and 56B3 are not necessarily formed over the entire circumference. It does not have to be formed. In this case, the recess 2212 may be provided according to the position of the projecting portion 563 .

In the above-described second embodiment, the rear surface portion 2B2 that constitutes the housing 2B has the projecting portion 2262 that projects from the inner side surface 2261 of the opening 226 as a housing-side projecting portion. However, the present invention is not limited to this, and such a projecting portion 2262 may be omitted, and even if the projecting portion 2262 is provided, it may not be provided over the entire circumference of the inner side surface 2261 . Even in this case, the sealing portion 56B is provided with a protruding portion 56B3 that protrudes outward from the inner side surface 2261 (inner edge 226E) of the opening 226 in a plan view (viewed from the normal direction of the contact surface 22A). All you have to do is

In each of the embodiments described above, the shape of the openings 221 and 226 in which the sealing portions 56A and 56B are arranged is substantially circular in plan view. However, the shape of the openings 221 and 226 is not limited to this, and can be changed as appropriate. For example, the shape of the openings 221 and 226 may be a polygonal shape in plan view, or may be another shape including an arcuate portion. Even in this case, when the sensor in which the sealing portion 56A or the first constituent portion 56P1 is formed in advance is attached to the housing (rear case) from the -Z direction side, the plan view of the sealing portion 56A or the first constituent portion 56P1 It is sufficient that the shape of the at is matched with the shape of the opening.

In each of the above-described embodiments, the rear portions 22 and 2B2 have recesses 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 sensors 5A and 5B may not have the amplifying section 57 . In this case, the amplifier section 57 may be provided on the circuit board 3 .

In each of the embodiments described above, the substrate 51 as the support substrate in the biological information detection sensors 5A and 5B has the gap forming portion 511 that forms the gap GP in which a portion of the connection member 6 is arranged, together with the recess 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 each of the above embodiments, the measuring devices 1A and 1B have the circuit board 3 and the biological information detection sensors 5A and 5B, and the circuit board 3 and the biological information detection sensors 5A and 5B are electrically connected by the connection member 6. and However, not limited to this, the sensor units 52A and 52B may be provided on the circuit board 3 . In this case, for example, by providing the sensor units 52A and 52B on the surface of the circuit board 3 on the +Z direction side, the light emitted from the light emitting unit can be easily applied to the living body, and the light emitted from the living body can be easily reflected. It is possible to make it easier for the light receiving section to receive the light. By providing the sensor sections 52A and 52B on the circuit board 3, the board 51 can be omitted, so that the measurement apparatuses 1A and 1B can be made thinner. Note that the position of the battery 4 can be changed as appropriate.

In each of the above embodiments, the sensor units 52A and 52B have the light emitting units 53A and 53B, which are packaged LED chips, respectively, 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 each of the above embodiments, 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 portion 53 can be easily diffused outside the sealing portions 56A and 56B, and the light incident on the sealing portions 56A and 56B can be transferred to the light receiving portion. 54 can be made easier to collect.
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 each of the above-described embodiments, the amplification section 57 and the connector 58 are arranged on the mounting surface 51A of the substrate 51 on which the sensor sections 52A and 52B are located. In other words, all components arranged on the substrate 51 are assumed to be arranged on the mounting surface 51A. However, the invention is not limited to this, and among the plurality of components arranged on the substrate 51, at least one component other than the sensor sections 52A and 52B is arranged on the back surface 51B opposite to the mounting surface 51A. may By configuring in this way, it becomes unnecessary to form a plurality of recesses 223 and 224 for arranging the amplifying section 57 and the connector 58 in the rear surface portions 22 and 2B2, and the thin portions are eliminated in the rear surface portions 22 and 2B2. The strength of the back surface portions 22, 2B2 and, by extension, the housings 2A, 2B can be increased.

In each of the above embodiments, the sensor sections 52A and 52B are assumed to have 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 each of the embodiments described above, the light blocking 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 portion 55 does not necessarily have to be sealed by the sealing portions 56A and 56B together with the light emitting portion 53 and the light receiving portion 54, and the light shielding portion may be provided outside the sealing portion. Also, as described above, part of the light shielding portion 55 may be located outside the sealing portions 56A and 56B. Furthermore, the light shielding part may be omitted.

In each of the above-described embodiments, the position of the tip of the light shielding portion 55 in the +Z direction, which is the projecting direction from the mounting surface 51A, is on the +Z direction side of the +Z direction end of the light emitting portion 53 (53A, 53B). It is assumed that the contact surface 561 is on the -Z direction side. However, the position of the tip portion is not limited to this, and the position of the tip portion can be appropriately changed as long as it is on the +Z direction side of the +Z direction side end of the light emitting portion 53 .
For example, the position of the tip of the light shielding part 55 may be substantially the same as the living body contact surface 561 or may be further +Z direction side than the living body contact surface 561 . In these cases, it is possible to prevent the light emitted from the light emitting section 53 from being internally reflected by the living body contact surface 561 that is the interface, going over the light shielding section 55 and entering the light receiving section 54 .

In order to align the position of the living body contact surface 561 and the position of the tip of the light shielding part 55, a method of molding the sealing part 56A using a mold or the like, or a method of forming the sealing part 56A so that these positions substantially coincide with each other. It is possible to employ a method of cutting the stop portion 56A.
Note that if the tip of the light shielding portion 55 is located on the +Z direction side of the living body contact surface 561, there is a possibility that the contact (wearability) between the living body contact surface 561 and the living body will be impaired. On the other hand, the tip portion of the light shielding portion 55 is located on the +Z direction side of the convex curved living body contact surface 561 and from the vertex of the living body contact surface 561 (the part located on the +Z direction side of the living body contact surface 561). If it is positioned on the -Z direction side, it is possible to suppress the deterioration of the contactability.

In each of the above embodiments, 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 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 each of the above embodiments, the biometric information detection sensors 5A and 5B detect a pulse wave, which is one of the biometric information, and the circuit board 3 is based on the pulse wave signals output from the biometric information detection sensors 5A and 5B. , to determine the pulse rate, which is another piece of biometric information. That is, the biological information measuring apparatuses 1A and 1B described above measure a pulse wave and a 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, measuring biological information such as HRV (Heart Rate Variability), RRI (RR Interval), blood pressure, blood sugar level, amount of activity, calorie consumption, and maximum oxygen uptake (VO ₂ max) using a photoelectric sensor. The present invention may be applied to a biological information measurement device.

1A, 1B... biological information measuring device, 2A, 2B... housing, 2R, 2RB... rear case, 22... rear portion, 22A... contact surface, 22B... inner surface, 221, 226... opening, 2211, 2261... inner side surface, 2212... Recessed part 2213... Bottom part 223... Recessed part 2262... Protruding part (housing side protruding part) 226E... Inner edge 5A, 5B... Biological information detection sensor 51... Substrate 51A... Mounting surface 51B... Back surface , 52A, 52B... Sensor part 53 (53A, 53B)... Light emitting part 54... Light receiving part 55... Light shielding part 551... First shielding part 5511... Tip part 552... Second shielding part 5521... Tip Part 553... Third shielding part 554... Fourth shielding part 56A, 56B... Sealing part 561... Living body contact surface 562, 56B2... Side part 563, 56B3... Protruding part 56B4... Surface 56B5... Concave portion, 5631...first projecting portion, 5632...second projecting portion, 57...amplifying portion.

Claims (7)

a housing having an opening in a contact surface that contacts a living body;
a sensor unit arranged in the opening in a plan view from the normal direction of the contact surface,
The sensor unit
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 seals the light-emitting portion and the light-receiving portion;
The sealing portion has a side portion that contacts the inner side surface of the opening,
one of the inner side surface and the side surface portion has a plurality of first protrusions ;
The biological information measuring device , wherein the other of the inner side surface and the side surface portion has one first recess into which the plurality of first protrusions are fitted . In the biological information measuring device according to claim 1,
The plurality of first protrusions are provided on the side surface,
The biological information measuring device, wherein the inner side surface has the first concave portion. In the biological information measuring device according to claim 2,
The biological information measuring device, wherein hardness of the plurality of first protrusions is smaller than hardness of the inner side surface. In the biological information measuring device according to any one of claims 1 to 3 ,
The biological information measuring device, wherein the side portion has a second projecting portion that contacts the contact surface. In the biological information measuring device according to claim 4,
The biological information measuring device, wherein the second projecting portion has a surface continuous with the contact surface. In the biological information measuring device according to claim 4 or claim 5,
the housing has a housing-side protruding portion protruding from the inner side surface toward the sealing portion;
The biological information measuring device, wherein the side surface portion has a second concave portion at a position corresponding to the housing-side projecting portion. In the biological information measuring device according to any one of claims 1 to 6,
The biological information measuring device, wherein the shape of each of the opening portion and the sealing portion includes an arcuate portion in plan view from a normal direction of the contact surface.

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