JP2019037329A - Biological information measuring device - Google Patents

Abstract

To enable efficient positioning of components such as boards in a biological information measuring device.SOLUTION: A biological information measuring device includes: a housing which can be held by a living body, has a measurement surface that can come into contact with the living body on a first side in a first direction, and has a fitting hole on a second side in a second direction perpendicular to the first direction; a biological information measuring part provided in the housing so as to come in contact with the measurement surface for measuring biological information on the living body; a board provided in the housing on which a control part for controlling the biological information measuring part is mounted, and a connector fitted into the fitting hole is mounted; and a positioning member provided in the housing, which forms a first positioning part for positioning the biological information measuring part and a second positioning part for positioning the board. The second positioning part is formed in the end part on a side opposite to the second side in the second direction in the positioning member, and overlaps with the board when viewed in the first direction.SELECTED DRAWING: Figure 9

Description

  The present disclosure relates to a biological information measurement device.

  With respect to an electronic control device mounted on a vehicle, a fitting hole is formed in the casing, the board is arranged in the casing in such a manner that the connector on the board is fitted into the fitting hole, and the board is pedestaled with screws. A technique for fixing to a part is known.

JP 2014-187099

  However, in the conventional technology as described above, positioning is possible only at the fitting portion between the connector and the fitting hole of the housing, which may be insufficient as a positioning function. For example, a slight rotation or displacement of the substrate may occur due to looseness at the fitting portion. In this case, the positioning accuracy of the substrate may deteriorate at a position away from the fitting portion. In particular, in a biological information measurement apparatus that mounts a relatively large number of components such as a biological information measurement unit, it is useful to be able to efficiently position various components with respect to the housing.

  Therefore, in one aspect, an object of the present invention is to enable efficient positioning of components such as a substrate in a biological information measuring device.

In one aspect, the living body can be gripped, has a measurement surface that can contact the living body on the first side in the first direction, and fits on the second side in a second direction perpendicular to the first direction. A housing having a joint hole;
A living body information measuring unit that is provided in the housing so as to be in contact with the measurement surface and measures the living body information of the living body;
A board provided with a connector mounted in the housing and mounted with a control unit that controls the biological information measurement unit and mounted in the fitting hole;
A first positioning part that is provided in the housing and positions the biological information measuring part; and a positioning member that forms a second positioning part that positions the substrate;
The biological information measuring device is provided, wherein the second positioning portion is formed at an end of the positioning member opposite to the second side in the second direction and overlaps the substrate when viewed in the first direction. The

  In one aspect, according to the present invention, components such as a substrate can be efficiently positioned in a biological information measuring device.

It is a perspective view which shows the biological information measuring device 1 by one Example. 1 is an exploded perspective view of a biological information measuring device 1. FIG. 3 is a cross-sectional view along the XZ plane passing through the center of the biological information measuring device 1. FIG. FIG. 6 is a cross-sectional view along the YZ plane passing through the connector 82. It is explanatory drawing of measurement operation | movement of the biological information measuring device. FIG. 6 is a perspective view from the lower side of a positioning member 60. FIG. 6 is a perspective view from above of a positioning member 60. It is the side view seen in the Y-axis direction from the Y-axis direction positive side. It is explanatory drawing of the positioning function of the positioning member 60. FIG. It is an explanatory view of a positioning function of the substrate 80 by the positioning member 60. FIG.

  Hereinafter, embodiments will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a perspective view showing a biological information measuring apparatus 1 according to an embodiment. In FIG. 1, three orthogonal axes X, Y, and Z are defined. Here, for the sake of explanation, the Z-axis is the vertical direction (an example of the first direction), and the positive side in the Z-axis direction is “upper side”. In FIG. 1, illustration of a part of the biological information measuring device 1 is omitted. Specifically, the biological information measuring device 1 has a sensing surface on the lower side (an example of the first side), and detailed components are not shown in FIG. FIG. 2 is an exploded perspective view of the biological information measuring apparatus 1, and is a perspective view seen from below. 3 and 4 are cross-sectional views of the biological information measuring device 1, FIG. 3 is a cross-sectional view along the XZ plane passing through the center of the biological information measuring device 1, and FIG. It is sectional drawing along a plane. 3 and 4 show some of the fine parts omitted in FIG. 2 for convenience.

  The biological information measuring device 1 is a device that can optically measure biological information through a transparent optical window 11 provided on a sensing surface. The biological information that can be optically measured is arbitrary, but is a pulse of a living body (for example, a person).

  As shown in FIGS. 1 and 2, the biological information measuring device 1 includes a biological information measuring unit 2, a housing 10, a positioning member 60, a substrate 80, and a battery 84.

  As shown in FIG. 3, the biological information measuring unit 2 has a laminated structure such as a sensor head substrate 100, a reflector 120, and an FPC (flexible printed circuit) 140. The sensor head substrate 100 is provided with a light emitting unit 20 and a light receiving unit 30. The light emitting unit 20 emits light toward the outside through the optical window 11. The light emitting unit 20 is formed by, for example, an LED (Light-Emitting Diode). The light receiving unit 30 receives light that enters the housing 10 through the living body, out of light emitted from the light emitting unit 20 to the outside during measurement. The light receiving unit 30 is formed by, for example, a photodiode.

  The housing 10 includes a transparent lower housing 200, an opaque upper housing 201, and an opaque bezel 202. The lower housing 200 and the upper housing 201 are fitted in a liquid-tight manner via an O-ring 90. The bezel 202 includes claw portions 250 (only one is visible in FIG. 2) on both sides in the X-axis direction, and the claw portions 250 engage with the engagement holes 252 of the upper housing 201. Thereby, the upper housing 201 and the lower housing 200 are integrated. A power switch 212 is provided on the side surface of the housing 10 on the Y axis direction positive side. A fitting hole 240 into which the connector 82 is fitted is provided on the side surface of the housing 10 in the Y-axis direction (an example of the second direction) on the negative side (an example of the second side). The lower housing 200 forms the optical window 11 described above. The bezel 202 has an opening 260 through which the optical window 11 is exposed.

  In the following description, unless otherwise specified, “outside” refers to the outside of the housing 10, and “inside the housing 10” refers to an internal space formed by the housing 10.

  The positioning member 60 is provided in the housing 10. The positioning member 60 is supported or fixed so as not to be displaced with respect to the housing 10. In this embodiment, as an example, the positioning member 60 is positioned in the vertical direction with respect to the housing 10 by ribs or the like (see FIG. 10), and the biological information measuring unit 2 is attached with the double-sided tape 110 (see FIG. 3). By being bonded, it is fixed to the housing 10. The positioning member 60 has a function of positioning the biological information measuring unit 2, the substrate 80, and the battery 84, respectively. Details of the positioning member 60 will be described later.

  The substrate 80 is provided in the housing 10. A control unit 83 that controls the biological information measurement unit 2 is mounted on the substrate 80. The control unit 83 may be realized by a microprocessor, for example. A connector 82 is mounted on the substrate 80 as shown in FIG. The connector 82 is fixed to the substrate 80. Although not shown, an antenna or the like may be mounted on the substrate 80.

  As shown in FIG. 4, the connector 82 is fitted into a fitting hole 240 formed in the lower housing 200. In addition, the outer peripheral part around the fitting hole 240 may be elastically deformable so that the gap between the connector 82 and the fitting hole 240 is not formed. The connector 82 can be electrically connected to the outside through an opening 241 formed in the upper housing 201.

  The battery 84 is provided in the housing 10. The battery 84 supplies power related to the biological information measuring apparatus 1. As shown in FIG. 3, the battery 84 is provided above the positioning member 60.

  FIG. 5 is an explanatory diagram of the measurement operation of the biological information measuring apparatus 1, and is a diagram schematically showing the biological information measuring apparatus 1 placed on the surface of the living body to be measured in a cross-sectional view. In FIG. 5, the biological information measuring device 1 is shown very schematically for the sake of explanation.

  At the time of measurement, the living body information measuring apparatus 1 comes into contact with the sensing surface on the optical window 11 side (for example, a finger is pressed against the sensing surface). In this contact state, when the light emitting unit 20 emits light to the outside, a part of the light travels toward the light receiving unit 30 through the living body as schematically shown by an arrow R1 in FIG. A part of the light passing through the living body enters the light receiving unit 30. The light receiving unit 30 generates an electrical signal (light reception signal) corresponding to the light reception result. This light reception signal includes information inside the living body. The light reception signal from the light receiving unit 30 may be processed by a processing device (not shown) on the sensor head substrate 100, for example.

  Here, the assembly procedure of the biological information measuring apparatus 1 will be outlined. First, the biological information measuring unit 2 and the positioning member 60 are assembled to the lower casing 200, then the substrate 80 (including the connector 82 and the like) is assembled, then the battery 84 and the O-ring 90 are assembled, and then the upper casing 201 is assembled. Assemble. Finally, assembling the biological information measuring device 1 is completed by assembling the bezel 202.

  Next, the positioning member 60 will be described with reference to FIG.

  6 is a perspective view from the lower side of the positioning member 60, FIG. 7 is a perspective view from the upper side of the positioning member 60, and FIG. 8 is a side view from the Y axis direction positive side in the Y axis direction. FIG. 9 is an explanatory diagram of the positioning function of the positioning member 60. FIG. 10 is an explanatory diagram of the positioning function of the substrate 80 by the positioning member 60, and is a cross-sectional view along the XZ plane.

  As shown in FIGS. 6, 7, and 9, the positioning member 60 positions the first positioning unit 601 that positions the biological information measuring unit 2, the second positioning unit 602 that positions the substrate 80, and the battery 84. And a third positioning portion 603 to be determined. The positioning member 60 includes the second positioning portion 602 and the third positioning portion 603, thereby ensuring a predetermined clearance (Z-axis direction clearance) between the substrate 80 and the battery 84.

  Specifically, the positioning member 60 is made of, for example, resin and includes a bottom plate portion 61 and a wall portion 62.

  The bottom plate portion 61 faces the substrate 80 in the Z-axis direction. An opening 610 is formed at the center of the bottom plate portion 61. The opening 610 has substantially the same opening shape (opening shape slightly larger than the outer shape of the sensor head substrate 100) as the outer shape of the sensor head substrate 100 (see FIG. 9) of the biological information measuring unit 2. Hereinafter, the difference between the two outer shapes is referred to as a predetermined clearance Δ1 (not shown). As shown in FIG. 10, the sensor head substrate 100 of the biological information measuring unit 2 is disposed in the opening 610. Thereby, the displacement in the XY plane of the biological information measuring unit 2 is limited within the predetermined clearance Δ1. The opening 610 may be in the form of a through hole. In the case of the through hole, it is advantageous in that the electrical connection between the biological information measuring unit 2 and the electronic component on the substrate 80 is facilitated. A locking portion 612 is formed on the peripheral wall of the opening 610. The locking part 612 regulates the displacement of the sensor head substrate 100 to the positive side in the Z-axis direction by contacting the sensor head substrate 100 in the Z-axis direction. Thus, in the present embodiment, as an example, the first positioning portion 601 is formed by the bottom plate portion 61, and more specifically, the first positioning portion 601 includes the opening 610 of the bottom plate portion 61 and the locking portion. 612.

  The wall portion 62 is erected on the end portions on both sides of the bottom plate portion 61 in the X-axis direction. The wall portion 62 is erected on the positive side in the Z-axis direction, and extends in the Y-axis direction and the Z-axis direction (that is, in the YZ plane). Note that “extending in the YZ plane” includes not only a form extending in parallel to the YZ plane but also a form in which a part thereof is inclined with respect to the YZ plane. As shown in FIG. 7, the wall portion 62 has a concave shape that is recessed downward as viewed in the X-axis direction. The concave shape is formed by the bottom portion 700 and the side portion 702.

  As shown in FIG. 9, the wall portion 62 supports the battery 84 using a concave shape on both sides in the X-axis direction. Specifically, as shown in FIG. 7, in the wall portion 62, the side portions 702 on both sides in the Y-axis direction contact the side surfaces in the Y-axis direction of the battery 84 or face each other with a predetermined clearance Δ2 (not shown). Thereby, the displacement of the battery 84 in the Y-axis direction is disabled or limited within the predetermined clearance Δ2. Further, as shown in FIG. 7, the wall portion 62 restricts the displacement of the battery 84 to the negative side in the Z-axis direction when the bottom portion 700 comes into contact with the battery 84 in the Z-axis direction (see FIG. 9). Thus, in the present embodiment, as an example, the third positioning portion 603 is formed by a concave shape in the wall portion 62, and more specifically, the third positioning portion 603 is connected to the bottom portion 700 of the wall portion 62. This is realized by the side portion 702.

  As shown in FIGS. 6 and 7, the wall portion 62 forms a second positioning portion 602 at the end on the Y axis direction positive side. That is, the second positioning portion 602 is formed at the end of the positioning member 60 on the Y axis direction positive side.

  As can be seen from FIGS. 9 and 10, the second positioning portion 602 overlaps the substrate 80 when viewed in the Z-axis direction. In the present embodiment, the second positioning portion 602 is not formed at the end portion on the Y axis direction negative side of the wall portion 62 (the end portion on the side where the connector 82 is fitted to the housing 10). That is, the end of the wall 62 on the Y axis direction negative side does not overlap the substrate 80 when viewed in the Z axis direction. As will be described later, on the side where the connector 82 is fitted to the housing 10, the board 80 is accurately positioned on the housing 10 due to the fitting, so the second positioning portion 602 is not necessary. It is because it becomes. However, in the modification, the second positioning portion 602 may be formed at the end portion of the wall portion 62 on the Y axis direction negative side.

  The second positioning unit 602 has inclined surfaces 670 on both sides in the X-axis direction (an example of the third direction). The inclined surface 670 extends in the Y-axis direction in a manner inclined with respect to the Z-axis direction. In the present embodiment, as an example, as shown in FIGS. 8 and 10, the second positioning portion 602 has a trapezoidal shape when viewed in the Y-axis direction, and surfaces facing each other in the X-axis direction form inclined surfaces 670. To do.

The distance d between the inclined surface 670 in the X-axis direction (see also FIG. 8), as shown in FIG. 10, in the first position P1 in the Z axis direction, than the length d ₀ of the substrate 80 in the X-axis direction Is longer (ie, d = d1> d ₀ ), and is shorter than the length d ₀ of the substrate 80 in the X-axis direction at the second position P2 below the first position P1 in the Z-axis direction (ie, d = d2 <d ₀ ). Accordingly, the second positioning portion 602 overlaps the substrate 80 for a length of (d1−d ₀ ) in the X axis direction when viewed in the Z axis direction. Incidentally, _{d1-d 0} may be about 0.6 mm.

  As shown in FIG. 10, the second positioning portion 602 faces the substrate 80 with a predetermined clearance Δ3 in the Z-axis direction. As a result, the displacement of the substrate 80 on the positive side in the Z-axis direction is limited within the predetermined clearance Δ3. Thus, in the present embodiment, as an example, the second positioning portion 602 is realized by a portion of the wall portion 62 that overlaps the substrate 80 (as viewed in the Z-axis direction).

  According to the present embodiment, as described above, since the positioning member 60 is provided, the biological information measuring apparatus 1 can efficiently position components such as the substrate 80.

  Specifically, according to the present embodiment, since the positioning member 60 forms the first positioning unit 601, the biological information measuring unit 2 can be positioned.

  Further, since the positioning member 60 forms the second positioning portion 602, the substrate 80 can be positioned. Here, regarding the positioning of the board 80, the connector 82 is fixed to the board 80 as described above, and the connector 82 is fitted into the housing 10. Therefore, the positioning accuracy of the board 80 is high on the side where the connector 82 is fitted to the housing 10 (in this embodiment, the Y axis direction negative side). On the other hand, the positioning accuracy of the board 80 tends to be poor on the side opposite to the side where the connector 82 is fitted in the housing 10 (in this embodiment, the Y axis direction positive side). That is, the substrate 80 is easily displaced in the vertical direction or the like on the side opposite to the side where the connector 82 is fitted to the housing 10. For example, in the middle of the assembly, the substrate 80 is easily displaced upward due to the elastic force of the FPC 140 of the biological information measuring unit 2 (elastic force due to springback). In this regard, according to the present embodiment, the second positioning portion 602 is provided on the side opposite to the side where the connector 82 is fitted to the housing 10, so that the FPC 140 resists the elastic force of the FPC 140. Positioning can be realized efficiently. In other words, the second positioning unit 602 has a temporary holding function for preventing the substrate 80 from popping upward by being fixed to the lower casing 200 in the middle of the assembly before the casing 10 is assembled. Fulfill. Note that in the assembled state of the biological information measuring apparatus 1, the substrate 80 has an upward projection (not shown) in the vertical direction and a downward projection in the vertical direction (FIG. 10). (See below) is held (restricted in the vertical direction).

  Further, according to the present embodiment, since the positioning member 60 forms the third positioning portion 603, the battery 84 can be positioned.

  Thus, according to the present embodiment, since the three parts of the biological information measuring unit 2, the substrate 80, and the battery 84 can be positioned using the single positioning member 60, efficient positioning is possible. Become. In the modification, additional components other than the biological information measurement unit 2, the substrate 80, and the battery 84 may be positioned. In another modification, only the biological information measuring unit 2 and the substrate 80 among the biological information measuring unit 2, the substrate 80, and the battery 84 may be positioned, or the biological information measuring unit 2 and the substrate 80 may be positioned. And components other than the battery 84 may be positioned.

Further, in this embodiment, the second positioning portions 602 on both sides in the X-axis direction have the inclined surfaces 670 as described above, so that the assembling property of the substrate 80 is good. Specifically, when assembling the substrate 80 from above with respect to the positioning member 60 assembled to the lower housing 200, both end portions in the X-axis direction of the substrate 80 are moved along the inclined surface 670. At this time, a force (a force in the X-axis direction) acts on the second positioning portion 602 in a direction in which the distance d between the inclined surfaces 670 in the X-axis direction is widened, and is elastically deformed. And if the board | substrate 80 moves below the lower end (1st position P1) of the inclined surface 670, the 2nd positioning part 602 will reset from an elastic deformation state to the original state. Thus, according to the present embodiment, since the second positioning portion 602 has the inclined surface 670, when the substrate 80 is assembled, the second positioning portion 602 does not require any special additional work, and the second positioning portion 602 has the inclined surfaces 670. 2 Since the positioning portion 602 is elastically deformed, the assembling property of the substrate 80 is good. Further, in the present embodiment, the distance d between the inclined surface 670 in the X axis direction which becomes the inlet side when assembling the substrate 80 is d1, longer than the length d ₀ of the substrate 80 in the X-axis direction Therefore, the work of inserting the substrate 80 between the second positioning portions 602 on both sides in the X-axis direction is facilitated, and the assembling property of the substrate 80 is improved.

  Here, the wall 62 is slightly elastically deformed when a force is applied to the second positioning portions 602 on both sides in the X-axis direction in a direction in which the distance d between the inclined surfaces 670 in the X-axis direction is increased. May have various elastic characteristics (shape characteristics). In this regard, the wall 62 is preferably at the end opposite to the side on which the connector 82 is fitted to the housing 10 (that is, the end on the side where the second positioning portion 602 is formed) It is formed so that the elastic modulus in the X-axis direction is lower than the end portion on the side where the connector 82 is fitted to the housing 10 with respect to the force in the X-axis direction. In the present embodiment, as an example, the wall portion 62 has a width of the base portion with respect to the end portion, as shown in FIG. The side on which 82 is fitted to the housing 10 is w2, and w2> w1. As a result, the end of the wall 62 opposite to the side on which the connector 82 is fitted to the housing 10 is X rather than the end on the side where the connector 82 is fitted to the housing 10. The elastic modulus is lowered with respect to the axial force. Thereby, when the board | substrate 80 is assembled | attached as mentioned above, the 2nd positioning part 602 slightly elastically deforms and the assembly | attachment property of the board | substrate 80 improves. On the other hand, the end portion on the side where the connector 82 is fitted to the housing 10 can maintain a relatively high elastic modulus, so that the necessary rigidity in the wall portion 62 can be ensured. In the present embodiment, as described above, the second positioning portion 602 is provided at the end portion on the Y axis direction negative side of the wall portion 62 (the end portion on the side where the connector 82 is fitted to the housing 10). , Not formed. That is, the end of the wall 62 on the Y axis direction negative side does not overlap the substrate 80 when viewed in the Z axis direction. Therefore, in this case, the end portion on the negative side in the Y-axis direction of the wall portion 62 may be formed, for example, in a mode having a significantly high elastic modulus.

  Although each embodiment has been described in detail above, it is not limited to a specific embodiment, and various modifications and changes can be made within the scope described in the claims. It is also possible to combine all or a plurality of the components of the above-described embodiments.

DESCRIPTION OF SYMBOLS 1 Biological information measuring device 2 Biological information measuring part 10 Case 11 Optical window 20 Light emitting part 30 Light receiving part 60 Positioning member 61 Bottom plate part 62 Wall part 80 Substrate 82 Connector 83 Control part 84 Battery 90 O-ring 100 Sensor head board 110 Double-sided tape 120 Reflector 200 Lower housing 201 Upper housing 202 Bezel 212 Power switch 240 Fitting hole 250 Claw portion 252 Engaging hole 260 Opening hole 601 First positioning portion 602 Second positioning portion 603 Third positioning portion 610 Opening 612 Locking Part 670 inclined surface 700 bottom part 702 side part

Claims (7)

A housing that can hold a living body, has a measurement surface that can contact the living body on a first side in a first direction, and has a fitting hole on a second side in a second direction perpendicular to the first direction. Body,
A living body information measuring unit that is provided in the housing so as to be in contact with the measurement surface and measures the living body information of the living body;
A board provided with a connector mounted in the housing and mounted with a control unit that controls the biological information measurement unit and mounted in the fitting hole;
A first positioning part that is provided in the housing and positions the biological information measuring part; and a positioning member that forms a second positioning part that positions the substrate;
The biological information measuring device, wherein the second positioning unit is formed at an end of the positioning member opposite to the second side in the second direction and overlaps the substrate when viewed in the first direction. The second positioning portion has inclined surfaces extending in the second direction on both sides of a third direction perpendicular to both the first direction and the second direction,
The distance between the inclined surfaces in the third direction is longer at the first position in the first direction than the length of the substrate in the third direction, and longer than the first position in the first direction. The biological information measuring device according to claim 1, wherein the second position on the first side is shorter than the length of the substrate in the third direction.   The biological information measuring device according to claim 2, wherein the second positioning unit has a trapezoidal shape when viewed in the second direction on each side in the third direction.   4. The biological information measuring device according to claim 2, wherein the positioning member does not overlap the substrate when viewed in the first direction at an end portion on the second side in the second direction. 5. A battery further provided on the opposite side of the first side in the first direction with respect to the substrate;
The biological information measuring device according to any one of claims 2 to 4, wherein the positioning member further forms a third positioning portion for positioning the battery. The positioning member is erected on a bottom plate portion facing the substrate in the first direction, and on both ends of the bottom plate portion in the third direction, and extends in the first direction and the second direction. A wall portion, and the wall portion has a concave shape that is recessed toward the first side in the first direction when viewed in the third direction,
The first positioning part is formed on the bottom plate part,
The second positioning portion is formed at an end of the wall portion opposite to the second side in the second direction,
The biological information measuring device according to claim 5, wherein the third positioning portion is formed by the concave shape in the wall portion.   The end portion of the wall portion opposite to the second side in the second direction is more resistant to the force in the third direction than the end portion of the wall portion in the second direction on the second side. The biological information measuring device according to claim 6, which is easily elastically deformed.