JP2013184004A - Photoelectric sensor and biological information measurement device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a photoelectric sensor and a biological information measurement device which allow the improvement of detection sensitivity.SOLUTION: A photoelectric sensor 10 includes: a light reception side reflection member 20 having a concave mirror part 21; a support member 30; and a light emitting element and a light receiving element 60 which are mounted to the support member 30. The support member 30 includes: a reflector part 31 positioned inside an opening of the concave mirror part 21; and beam parts 41 and 42. A first surface of the reflector part 31 includes a recessed part having a bottom surface part muonted with the light emitting element and a slant surface part. A second surface of the reflector part 31 is munted with the light receiving element 60. The beam parts 41 and 42 include: wires 44 and 45 for the light emitting element which are connected to the light emitting element; and wires 46 and 47 for the light receiving element which are connected to the light receiving element 60.

Description

  The present invention relates to a photoelectric sensor and a biological information measuring apparatus using the photoelectric sensor.

As a photoelectric biological information detector (photoelectric sensor) for measuring biological information such as a pulse rate, one having a light emitting part and a light receiving part is known (Patent Document 1).
As shown in FIGS. 9 and 10, this biological information detector has a reflector 110 and a light emitting element 120 attached to the surface of the transparent substrate 100 such as polyimide, and a light receiving element 130 attached to the back surface of the transparent substrate 100. Further, a hemispherical detection reflection unit (not shown) is attached.

Here, the reflector 110 is formed in a substantially disc shape by synthetic resin or ceramic. The reflector 110 has a recess 111 in which the light emitting element 120 is disposed. The recess 111 includes a flat bottom surface 112 and an inclined surface 113. The light emitting element 120 is fixed to the bottom surface 112. Further, since the inclined surface 113 is a reflecting surface, the reflectance is appropriately improved by silver plating or the like.
The light emitting element 120 is electrically connected to the wirings 101 and 102 formed on the surface of the transparent substrate 100 by bonding wires 103 and 104. The bonding wires 103 and 104 connect the wirings 101 and 102 and the light emitting element 120 beyond the end of the reflector 110.

  On the other hand, two wirings 105 and 106 are provided on the back surface of the transparent substrate 100, and a light receiving element 130 is further attached. The wiring 105 is disposed up to the back surface of the light receiving element 130 and is directly connected to a terminal of the light receiving element 130. The wiring 106 is connected to the light receiving element 130 by a bonding wire 107.

JP2011-139725A

  In the conventional photoelectric sensor, the light receiving element 130 is arranged on the back side of the transparent substrate 100, so that the light irradiated from the light emitting element 120 toward the living body and reflected by the blood vessel portion of the living body passes through the transparent substrate 100. Then, the light enters the light receiving element 130. For this reason, diffuse reflection due to light passing through the transparent substrate 100 occurs, and external light (noise) or the like also enters the light receiving element 130, which causes a problem that the sensitivity of pulse detection by the photoelectric sensor is lowered.

In order to improve the adhesion of the wirings 101, 102, 105, 106 to the transparent substrate 100, fine irregularities may be formed on each surface of the substrate 100. In this case, if unevenness remains, the light reflected by the blood vessel portion is also scattered on the substrate surface, and the amount of light received by the light receiving element 130 is reduced.
On the other hand, a resist is applied to the surface of the substrate and the surface is processed smoothly, but in this case, light absorption occurs in the resist portion, so that the amount of light received by the light receiving element 130 also decreases.
Accordingly, when the transparent substrate 100 is provided, there is a problem that the light amount of light is reduced by about 20 to 30% when passing through the substrate 100, and the detection sensitivity of the photoelectric sensor is lowered.

  An object of the present invention is to provide a photoelectric sensor and a biological information measuring device capable of improving detection sensitivity.

  The photoelectric sensor of the present invention includes a light receiving side reflecting member having a concave mirror part, a support member, a light emitting element and a light receiving element attached to the support member, and the support member is in the opening of the concave mirror part. A reflector portion having a first surface to which the light emitting element is attached and a second surface opposite to the first surface to which the light receiving element is attached; and a beam extending from the reflector portion to the concave mirror portion A concave portion having a bottom surface portion to which the light emitting element is attached and an inclined surface portion is formed on the first surface of the reflector portion, and the beam portion is connected to the light emitting element. A light emitting element wiring and a light receiving element wiring connected to the light receiving element are provided.

  According to the present invention, the support member that supports the light emitting element and the light receiving element is configured to include a reflector portion and a beam portion, and the beam portion is extended from the reflector portion to the concave mirror portion of the light receiving side reflection member. Yes. For this reason, only a beam part is arrange | positioned between a reflector part and a concave mirror part, and let the other part be the space without a board | substrate. Therefore, the light irradiated from the light emitting element and reflected at the measurement site does not pass through the support substrate of the light emitting element or the light receiving element as in the past, but is reflected by the concave mirror part through the space around the reflector part, and the light receiving element Is received. Therefore, unlike the prior art, the amount of reflected light does not decrease by passing through the substrate, the amount of light received by the light receiving element can be improved, and the detection sensitivity of the photoelectric sensor can also be improved.

  In the photoelectric sensor of the present invention, a wiring continuous from the beam portion is formed on the bottom surface portion and the slope portion of the reflector portion, and the wiring and the terminal of the light emitting element are electrically connected by a bonding wire, and the bonding wire Is preferably disposed in the recess.

  If the bonding wire is disposed in the recess, that is, if it does not protrude from the recess, the backup device can be brought into contact with the entire first surface that is the surface of the reflector portion. For this reason, when bonding the light receiving element attached to the second surface of the reflector portion and the wiring, the entire first surface can be backed up, so that the central axis of the light emitting element coincides with the central axis of the light receiving element. Can do. For this reason, the photoelectric sensor has no optical deviation in the optical system from the light emitting element to the light receiving element, and can perform stable light reception.

  In the photoelectric sensor of the present invention, the beam portion includes a first surface continuous with the first surface of the reflector portion and a second surface continuous with the second surface of the reflector portion, and the first of the beam portions. The surface is provided with a wiring that conducts to the terminal of the light emitting element, and the wiring extends to the second surface through the side surface of the beam portion, and the second surface of the beam portion has a terminal of the light receiving element. A conductive groove is provided on the light receiving side reflection member, and a concave groove in which the beam portion is disposed is formed in the light receiving side reflection member. It is preferable that the wiring provided in the light receiving side reflecting member and the wiring provided in the beam portion are electrically connected by the conductive member.

  Since each wiring is conducted using a conductive member such as solder or conductive adhesive, each wiring can be reliably conducted, and the support member can be securely fixed to the light receiving side reflection member, and the photoelectric sensor can be easily installed. Can be assembled and manufactured. Further, by arranging the beam portion in the concave groove of the light receiving side reflecting member, it can be assembled so that the support member does not protrude from the surface (first surface) of the light receiving side reflecting member in which the opening of the reflecting mirror portion is formed. . For this reason, a photoelectric sensor can be easily incorporated in a biological information measuring device or the like.

  In the photoelectric sensor of the present invention, the light-receiving side reflecting member is formed in a rectangular parallelepiped shape, a first surface having the concave mirror portion opened, a second surface facing the first surface, the first surface and the second surface. And a wiring provided in the concave groove of the light-receiving-side reflecting member is formed on the second surface from the concave groove to at least the second surface via the side surface. It is preferable that each electrode pad is electrically connected.

  Since the electrode pad that conducts to the light emitting element and each terminal of the light receiving element is provided on the second surface of the light receiving side reflection member, the conduction to the circuit board that controls the photoelectric sensor can be easily performed.

  In the photoelectric sensor of the present invention, the support member includes the reflector portion and two beam portions extending in opposite directions from the reflector portion, and the one beam portion includes the light emitting element. A wiring that conducts to the first terminal of the element; a wiring that conducts to the first terminal of the light receiving element; and a wiring that conducts to the second terminal of the light emitting element on the other beam portion; It is preferable that a wiring conducting to the second terminal of the light receiving element is provided.

If the support member has two beam portions, the width dimension of the beam portion can be reduced as compared with the case where the reflector portion is cantilevered by one beam portion. For this reason, the reflected light intercepted by the beam portion can be reduced, and light can be received on average from various directions. Moreover, compared with the case where only one beam part is provided, the support strength of a reflector part can be improved easily and the arrangement position accuracy of a reflector part can also be improved easily.
Furthermore, since the two wirings for the light emitting element can be divided into each beam part and the two wirings for the light receiving element can be divided into each beam part, the wiring work is facilitated. In particular, since the wiring for the light emitting element and the wiring for the light receiving element can be wired on different surfaces of the beam portion, it is sufficient to form only one wiring on each surface of the beam portion. Since it is not necessary to make the two adjacent to each other, the wiring work can be easily performed.

  In the photoelectric sensor of the present invention, the support member includes the reflector portion and one beam portion extended from the reflector portion, and the beam portion includes a first terminal of the light emitting element. Two wirings that are electrically connected to the second terminal and two wirings that are electrically connected to the first terminal and the second terminal of the light receiving element may be provided.

  If there is only one beam portion, the beam portion is provided only at one place around the reflector portion, and the other portions can be made space. For this reason, when there is one place where there is almost no reflected light depending on the measurement object, the detection accuracy can be improved by arranging the beam portion in that direction.

  The biological information measuring device of the present invention includes the photoelectric sensor and a device main body in which the photoelectric sensor is incorporated. The device main body includes light emitted from a light emitting element of the photoelectric sensor, and a light receiving element. A window through which received light is transmitted is formed.

  According to the living body information measuring apparatus of the present invention, living body information such as a pulse rate can be measured by irradiating light from a light emitting element onto an inspection site of a living body and receiving the reflected light by a light receiving element. Since the photoelectric sensor is used for the measurement of the biological information, the detection sensitivity can be improved.

It is a schematic perspective view which shows the biological information measuring device of 1st Embodiment of this invention. It is a schematic perspective view which shows the photoelectric sensor of 1st Embodiment. It is sectional drawing of a photoelectric sensor. It is a disassembled perspective view of a photoelectric sensor. It is a perspective view which shows the supporting member of a photoelectric sensor. It is a perspective view which shows the supporting member of a photoelectric sensor. It is a figure explaining the detection operation of a photoelectric sensor. It is a schematic perspective view which shows the photoelectric sensor of 2nd Embodiment. It is a schematic perspective view which shows the conventional photoelectric sensor. It is sectional drawing which shows the conventional photoelectric sensor.

[First Embodiment]
Hereinafter, a living body information measuring device provided with a photoelectric sensor of a 1st embodiment concerning the present invention is explained based on a drawing.

[Overall configuration of biological information measuring apparatus]
1A and 1B are perspective views schematically showing the biological information measuring apparatus 1 according to the first embodiment, in which FIG. 1A shows the front side of the biological information measuring apparatus 1 and FIG. 1B shows the back side of the biological information measuring apparatus 1. FIG.
The biological information measuring apparatus 1 is an apparatus that measures the state of a blood vessel such as a pulse by irradiating light onto an examination site and detecting the reflected light. Specifically, the biological information measuring device 1 includes a device main body 2 and a band 3 connected to the device main body 2 as shown in FIG. And such a biological information measuring device 1 is attached to a living body by tightening the band 3 with the back surface in close contact with the living body, and can monitor and measure the state of a blood vessel, for example, for 24 hours.

[Device configuration]
As shown in FIG. 1 (A), a display unit 4 showing the measurement result is provided on the surface side of the main body 2 of the biological information measuring device 1, and the biological information measuring device 1 is provided on the side surface of the main body 2. An operation unit 5 is provided for operation. Further, a glass window 6 is formed on the back side of the apparatus body 2, and the photoelectric sensor 10 of the present invention is disposed on the back side of the window 6 (inside the apparatus body 2).

[photoelectric sensor]
As shown in FIGS. 2 to 4, the photoelectric sensor 10 includes a light receiving side reflection member 20, a support member 30, a light emitting element 50 including a light emitting diode (LED) attached to the support member 30, and a photodiode (PD). ).

[Reception member on the light receiving side]
The light-receiving side reflecting member 20 is formed in a rectangular parallelepiped shape with a synthetic resin such as polyphthalamide (PPA). For this reason, the light-receiving side reflecting member 20 includes a first surface 201 disposed on the window 6 side of the apparatus main body 2, a second surface 202 facing the first surface 201, and four side surfaces.
A concave mirror portion 21 is formed on the first surface 201. The concave mirror portion 21 has a reflective surface such as silver plating formed on a hemispherical concave portion to increase the reflectance.

On the first surface 201, two concave grooves 22 and a concave groove 23 in which the support member 30 is disposed are formed. The concave grooves 22 and 23 are extended from the concave mirror portion 21 toward opposite sides, and are opened on the side surfaces 203 and 204.
The concave groove 22 is provided with a wiring 25 that conducts to the cathode (second terminal) of the light emitting element 50 and a wiring 26 that conducts to the anode (first terminal) of the light receiving element 60.
The concave groove 23 is provided with a wiring 24 that conducts to the anode (first terminal) of the light emitting element 50 and a wiring 27 that conducts to the cathode (second terminal) of the light receiving element 60.

The wiring 25 is wired on the upper surface, the side surface 203, and the second surface 202 of the concave groove 22, and is connected to the electrode pad 25 </ b> A formed on the second surface 202.
The wiring 24 is wired to the upper surface, the side surface 204, and the second surface 202 of the concave groove 23, and is connected to the electrode pad 24 </ b> A formed on the second surface 202.

The wiring 26 is wired to the upper surface, the side surface, the first surface 201, the side surface 203, and the second surface 202 of the concave groove 22, and is connected to the electrode pad 26 </ b> A formed on the second surface 202.
The wiring 27 is wired to the upper surface, the side surface, the first surface 201, the side surface 204, and the second surface 202 of the concave groove 23, and is connected to the electrode pad 27 </ b> A formed on the second surface 202.

[Support member]
The support member 30 is made of a synthetic resin such as polyphthalamide (PPA) in the same manner as the light-receiving side reflection member 20. As shown in FIGS. 4 to 6, the support member 30 includes a reflector portion 31, and two beam portions 41 and a beam portion 42 that extend from the reflector portion 31 in directions opposite to each other.

[Reflector part]
The reflector portion 31 is formed in a disc shape, and a first surface 32 facing the window 6 side, and a second surface 33 provided on the opposite side to the first surface 32 and facing the light-receiving side reflecting member 20 side. And.

As shown in FIG. 6, the first surface 32 has a recess 34 that opens to the window 6 side. The concave portion 34 includes a slope portion 341 formed into a spherical shape and a flat bottom portion 342.
The light emitting element 50 is bonded to the bottom surface portion 342.

  As shown in FIG. 5, a cathode electrode pad 47A for the light receiving element 60 is provided on the second surface 33, and the light receiving element 60 is bonded onto the electrode pad 47A.

[Beam]
The beam portion 41 and the beam portion 42 are disposed in the concave groove 22 and the concave groove 23 of the light receiving side reflection member 20, and are fixed by solder or a conductive adhesive as will be described later.
The beam portion 41 includes a first surface 411 that is the same plane continuous to the first surface 32 of the reflector portion 31 and a second surface 412 that is the same plane continuous to the second surface 33.
The beam portion 42 includes a first surface 421 that is the same plane that is continuous with the first surface 32 of the reflector portion 31, and a second surface 422 that is the same plane that is continuous with the second surface 33.

As shown in FIG. 6, wirings 45 and 44 that are electrically connected to the light emitting element 50 are formed in the beam portions 41 and 42.
The wiring 45 is formed from the bottom surface portion 342 of the concave portion 34 to the slope portion 341, the first surface 32, the first surface 411 of the beam portion 41, the end surface 413 of the beam portion 41, and the second surface 412 of the beam portion 41. .
Similarly, the wiring 44 is formed from the bottom surface portion 342 of the concave portion 34 to the slope portion 341, the first surface 32, the first surface 421 of the beam portion 42, the end surface 423 of the beam portion 42, and the second surface 422 of the beam portion 42. Has been.
The wiring 44 is connected to the anode of the light emitting element 50 via the bonding wire 51, and the wiring 45 is connected to the cathode of the light emitting element 50 via the bonding wire 52.

Further, as shown in FIG. 5, wirings 46 and 47 that are connected to the light receiving element 60 are formed in the beam portions 41 and 42.
The wiring 46 is formed from the second surface 33 of the reflector portion 31 to the second surface 412 of the beam portion 41. The wiring 46 is connected to the anode of the light receiving element 60 through the bonding wire 61.
The wiring 47 is formed from the electrode pad 47 </ b> A on the second surface 33 of the reflector portion 31 to the second surface 422 of the beam portion 42. Accordingly, the wiring 47 is connected to the cathode of the light receiving element 60 through the electrode pad 47A.

[Joint structure of light receiving side reflection member and support member]
As shown in FIG. 4, the light-receiving side reflection member 20 and the support member 30 are arranged by fixing the beam portions 41 and 42 in the concave grooves 22 and 23.
At this time, since the wires 45 and 46 of the beam portion 41 overlap the wires 25 and 26 of the concave groove 22 in the vertical direction, the beam portion 41 is recessed by bonding the wires with solder or a conductive adhesive. It is fixed to the groove 22.
Similarly, since the wirings 44 and 47 of the beam part 42 overlap with the wirings 24 and 27 of the concave groove 23 in the vertical direction, the beam part 42 is recessed by bonding the wirings with solder or a conductive adhesive. It is fixed to the groove 23.
As described above, as shown in FIG. 2, the light-receiving side reflection member 20 and the support member 30 are fixed in a state where the reflector portion 31 is disposed at the center of the opening surface of the concave mirror portion 21.

[Manufacturing process of photoelectric sensor]
Next, the manufacturing process of the photoelectric sensor 10 of the present invention will be described.
First, the wirings 44 to 47 are formed on the support member 30, the light emitting element 50 is bonded to the bottom surface portion 342, and the wirings 44 and 45 are connected to the terminals of the light emitting element 50 with bonding wires 51 and 52. At this time, as shown in FIG. 3, the bonding wires 51 and 52 are wired so as to be within the height dimension of the recess 34, and are provided so as not to protrude from the first surface 32.

  Next, the light receiving element 60 is fixed on the electrode pad 47A on the second surface 33 of the support member 30 using a conductive adhesive or the like. Next, the wiring 46 and the light receiving element 60 are connected by the bonding wire 61. Since the bonding wires 51 and 52 do not protrude from the first surface 32 at the time of bonding, the bonding operation can be performed by bringing the first surface 32 into contact with the backup device. Support with.

And each wiring 44-47 of the beam parts 41 and 42 of the support member 30 is fixed to each wiring 24-27 of the light-receiving side reflecting member 20 which coated the reflective film on the concave mirror part 21 with solder or a conductive adhesive. Thus, the photoelectric sensor 10 is completed.
The biological information measuring device 1 is completed by incorporating the photoelectric sensor 10 into the device main body 2.

[Measurement by biological information measuring device]
In order to measure biological information such as the pulse rate, first, the biological information measuring apparatus 1 is attached to a measurement part of the living body, for example, the wrist, and light is emitted from the light emitting element 50 through the window 6 as shown in FIG. Irradiate. Then, the light is reflected by the blood vessel 7, and the reflected light is reflected by the concave mirror 21 and received by the light receiving element 60.
The light irradiated on the living body is partially absorbed by the blood vessel 7, but the absorption rate in the blood vessel 7 changes due to the influence of the pulse, and the amount of light reflected by the blood vessel 7 also changes. For this reason, the pulse rate can be measured by detecting a change in the amount of light received by the light receiving element 60.
Since the opening of the concave mirror portion 21 is a space other than the portion where the support member 30 is disposed, most of the reflected light incident from the window 6 does not pass through the beam portions 41 and 42, and the concave mirror portion 21. And is received by the light receiving element 60.

[Effects of First Embodiment]
According to the present embodiment, since the support member 30 that supports the light emitting element 50 and the light receiving element 60 is configured by the reflector part 31 and the beam parts 41 and 42, the opening of the concave mirror part 21 is provided in each element as in the conventional case. Compared with a case where the substrate is supported by a substrate that supports the sensor, there is no reduction in the amount of light when reflected light passes through the substrate, and the detection sensitivity of the photoelectric sensor 10 can be improved. For this reason, according to the biological information measuring device 1, biological information such as a pulse rate can be detected with high accuracy.

The wirings 44 and 45 of the light emitting element 50 are provided to extend to the bottom surface part 342 of the recess 34 to which the light emitting element 50 is attached. For this reason, the bonding wires 51 and 52 that conduct the respective terminals (anode and cathode) of the light emitting element 50 and the wirings 44 and 45 can be accommodated in the recess 34. That is, the bonding wires 51 and 52 can be bonded so as not to protrude from the level of the first surface 32 which is the upper surface level of the recess 34.
For this reason, when the bonding wire 61 of the light receiving element 60 is mounted, the bonding pad can be pressed against the light receiving element 60 while the entire first surface 32 of the reflector portion 31 is in contact with the backup device. For this reason, the load applied when the bonding pad is pressed can be supported by the entire first surface 32 of the reflector portion 31. Thereby, the central axes of the light emitting element 50 and the light receiving element 60 can be the same axis on the Z axis orthogonal to the first surface 32 and the second surface 33 of the reflector portion 31.
On the other hand, as shown in FIG. 9, when the bonding wires 103 and 104 of the light emitting element 120 are provided beyond the reflector 110, the bonding wires 103 and 104 interfere with each other, so that the entire upper surface of the reflector 110 is backed up. I can't.
Therefore, as shown in FIG. 10, in the bonding connection process of the light receiving element 130, the weight when the bonding pad of the light receiving element 130 is pressed needs to be received by the peripheral wall portion where the bonding wires 103 and 104 are not arranged in the reflector 110. There is. For this reason, the backup position for receiving the weight is an arrow 131, and the backup device must be manually positioned and arranged.
In addition, since the position where the bonding pad is pressed is also the position of the arrow 132 coaxial with the arrow 131, the center axis of the light receiving element 130 and the center axis of the light emitting element 120 are shifted, resulting in optically distorted light receiving performance. May also decrease.
On the other hand, according to the present invention, as described above, since the entire first surface 32 of the reflector portion 31 can be backed up, the light emitting element 50 and the light receiving element 60 can coincide with the same Z axis as the central axis. For this reason, the photoelectric sensor 10 can realize an optical system that is optically biased and can perform stable light reception.

  Furthermore, since the back-up can be performed on a flat surface when the light-emitting element 50 or the light-receiving element 60 is mounted, there is no need to manually position the backup device as in the conventional case, the bonding operation can be automated, and the mass productivity of the photoelectric sensor 10 is improved. it can.

When the support member 30 is fixed to the light-receiving side reflecting member 20, the wires 24 to 27 and 44 to 47 are electrically connected by solder or conductive adhesive, so that the wires 24 to 27 and 44 to 47 are securely connected. The supporting member 30 can be securely fixed to the light-receiving side reflecting member 20, and the photoelectric sensor 10 can be easily assembled and manufactured.
Since the beam portions 41 and 42 are disposed in the concave grooves 22 and 23 of the light receiving side reflecting member 20, it is possible to assemble so that the support member 30 does not protrude from the first surface 201 of the light receiving side reflecting member 20. For this reason, the photoelectric sensor 10 can be easily incorporated into the biological information measuring apparatus 1.

  Since the four electrode pads 24 </ b> A to 27 </ b> A are provided on the second surface 202 of the light-receiving side reflection member 20 to be connected to the terminals of the light-emitting element 50 and the light-receiving element 60, conduction with the circuit board that controls the photoelectric sensor 10 is easy. Can be done.

  Since the support member 30 includes the two beam portions 41 and 42, the position of the reflector portion 31 can be set with high accuracy, and the support strength of the reflector portion 31 can be easily improved. Moreover, the width dimension of the beam parts 41 and 42 can be made small compared with the case where a reflector part is cantilever-supported with one beam part. For this reason, the reflected light intercepted by the beam portion can be reduced, and light can be received on average from various directions.

Since the two beam portions 41 and 42 are provided and the wirings 44 to 47 are separately wired on the first surface 411 and 421 and the second surface 412 and 422, each of the beam portions 41 and 42 is provided. Since only one wiring needs to be formed on the surface, it is not necessary to adjoin the wiring on one surface, so that wiring work can be easily performed.
Further, since the support members 30 have the beam portions 41 and 42 and the reflector portion 31 arranged in a straight line, when the support member 30 is manufactured, the beam portions 41 of the plurality of support members 30, the beam portions 42. Since the light emitting element 50 and the light receiving element 60 can be mounted in a state where they are connected to each other, the mass production cost can be reduced.

[Second Embodiment]
Next, a photoelectric sensor 10A according to a second embodiment of the present invention will be described with reference to FIG. The photoelectric sensor 10A includes a light-receiving side reflecting member 20A and a support member 30A.
The light receiving side reflecting member 20A is different from the light receiving side reflecting member 20 in that only one concave groove 22 is formed as a concave groove.
The support member 30A is different from the support member 30 in that only one beam portion 41 is formed as a beam portion.
And since the groove 22 and the beam part 41 are one each, as shown in FIG. 8, each wiring 24-27 and 44-47 are collectively provided in these grooves 22 and the beam part 41, too. .

Such a second embodiment also has the same operational effects as the first embodiment.
Furthermore, since there is only one beam portion 42, the beam portion 42 is provided only at one location around the reflector portion 31, and the other portions can be made space. For this reason, when there is one place where there is almost no reflected light depending on the measurement object, the detection accuracy can be improved by arranging the beam portion 42 in that direction.

[Modification of Embodiment]
It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
For example, in the support member, the number of beam portions is not limited to two or one, but may be three or four or more. However, it is preferable to reduce the number of beam portions in that the decrease in the amount of reflected light can be suppressed.

In the above-described embodiment, the electrode pads 24A to 27A are arranged on the second surface 202 of the light-receiving side reflecting member 20. However, the electrode pads can be formed on the side surfaces 203 and 204, etc., as long as conduction to the circuit board is possible. May be formed. Similarly, the wirings 24 to 27 and 44 to 47 are not limited to the arrangement of the embodiment.
In addition, the light-receiving side reflection member is not limited to a rectangular parallelepiped shape, and may be another three-dimensional shape such as a columnar shape. Furthermore, the reflector part 31 should just be arrange | positioned in the opening of the concave mirror part 21, not only what is located in the center of the opening of the concave mirror part 21. FIG.

  The photoelectric sensor 10 and the biological information measuring device 1 can be used not only for detecting the pulse rate but also for measuring various biological information that can be detected by irradiating light to the living body and detecting the reflected light. Furthermore, the photoelectric sensor 10 may be used for measurements other than biological information.

  DESCRIPTION OF SYMBOLS 1 ... Biological information measuring device, 2 ... Apparatus main body, 6 ... Window, 10, 10A ... Photoelectric sensor, 20, 20A ... Light-receiving side reflection member, 21 ... Concave mirror part, 22, 23 ... Concave groove, 24-27, 44- 47 ... Wiring, 24A to 27A ... Electrode pad, 30, 30A ... Support member, 31 ... Reflector part, 32 ... First surface, 33 ... Second surface, 34 ... Recess, 41, 42 ... Beam part, 47A ... Electrode pad , 50... Light emitting element, 51 and 52. Bonding wire, 60... Light receiving element, 61... Bonding wire, 341.

Claims (7)

A light receiving side reflecting member having a concave mirror part;
A support member;
A light emitting element and a light receiving element attached to the support member;
The support member is
A reflector portion located in the opening of the concave mirror portion, having a first surface to which the light emitting element is attached and a second surface to which the light receiving element is attached and opposite to the first surface;
A beam portion extended from the reflector portion to the concave mirror portion,
The first surface of the reflector portion is formed with a recess having a bottom surface portion to which the light emitting element is attached and a slope portion,
The photoelectric sensor, wherein the beam portion is provided with a wiring for a light emitting element connected to the light emitting element and a wiring for a light receiving element connected to the light receiving element. The photoelectric sensor according to claim 1,
In the bottom surface portion and the slope portion of the reflector portion, a continuous wiring is formed from the beam portion, and this wiring and the terminal of the light emitting element are electrically connected by a bonding wire,
The said bonding wire is arrange | positioned in the said recessed part. The photoelectric sensor characterized by the above-mentioned. The photoelectric sensor according to claim 1 or 2,
The beam portion includes a first surface continuing to the first surface of the reflector portion, and a second surface continuing to the second surface of the reflector portion,
The first surface of the beam portion is provided with wiring that conducts to the terminal of the light emitting element, and this wiring is extended to the second surface through the side surface of the beam portion,
The second surface of the beam portion is provided with a wiring that conducts to the terminal of the light receiving element,
The light receiving side reflecting member is formed with a concave groove in which the beam portion is arranged, and a surface of the concave groove facing the second surface of the beam portion is provided with a wiring that conducts to each of the wirings.
The photoelectric sensor, wherein the wiring provided on the light-receiving side reflecting member and the wiring provided on the beam portion are electrically connected by a conductive member. The photoelectric sensor according to claim 3.
The light-receiving side reflecting member is formed in a rectangular parallelepiped shape, a first surface in which the concave mirror portion is opened, a second surface facing the first surface, and a side surface disposed between the first surface and the second surface. And
The wiring provided in the concave groove of the light-receiving side reflecting member is continuous from the concave groove to at least the second surface via the side surface, and is electrically connected to the electrode pad formed on the second surface. A photoelectric sensor characterized by The photoelectric sensor according to any one of claims 1 to 4,
The support member includes the reflector portion and two beam portions extending from the reflector portion in directions opposite to each other.
The one beam portion is provided with wiring that conducts to the first terminal of the light emitting element and wiring that conducts to the first terminal of the light receiving element,
The photoelectric sensor, wherein the other beam portion is provided with a wiring that conducts to the second terminal of the light emitting element and a wiring that conducts to the second terminal of the light receiving element. The photoelectric sensor according to any one of claims 1 to 4,
The support member is configured to include the reflector portion and one beam portion extended from the reflector portion,
In the beam portion, there are two wirings that are conductive to the first terminal and the second terminal of the light emitting element, and two wirings that are conductive to the first terminal and the second terminal of the light receiving element. A photoelectric sensor characterized by being provided. The photoelectric sensor according to any one of claims 1 to 6,
An apparatus main body incorporating the photoelectric sensor,
The biological information measuring device according to claim 1, wherein a window through which light emitted from a light emitting element of the photoelectric sensor and light received by the light receiving element is transmitted is formed in the apparatus main body.