Biological sensor and biological information detection device

Abstract

A biological sensor (100) comprises: a housing (2) having a convex curved surface protruding in a first direction; and a substrate (1) disposed inside the housing (2). The biological sensor (100) is used with the housing (2) facing a living body in the first direction. The substrate (1) has: a first portion (11) and a second portion (12) that are in different positions in the first direction; and a protrusion portion that is provided between the first portion and the second portion and causes the first portion to protrude from the second portion in the first direction. A living body detection element is disposed on a surface of the first portion (11) orthogonal to the first direction.

Description

Biometric sensor and biological information detection device

[0001] The present invention relates to a biosensor and a bioinformation detection device including the biosensor.

[0002] A biosensor that detects weak light components and includes a light-emitting element and a light-receiving element is disclosed in, for example, Patent Document 1. In a bioinformation detection device using this biosensor, the entire sensor substrate on which the light-emitting unit and the light-receiving unit are mounted is flat.

[0003] Furthermore, a rigid-flexible printed circuit board and a manufacturing method thereof are disclosed, for example, in Patent Document 2. This rigid-flexible circuit board includes a first rigid area, a second rigid area, and a flexible area connecting the first rigid area and the second rigid area.

[0004] JP 2016-047105 A

[0005] In the biometric information detection device disclosed in Patent Document 1, the entire sensor board mounting the light-emitting unit and light-receiving unit is flat. Therefore, if the sensor board is large enough, it will interfere with the curved area, making it difficult to bring the sensor board too close to the human body, which is the detection target. Using a large sensor board and increasing the distance between the sensor board and the human body will worsen the S / N ratio of the biometric signal. Furthermore, increasing the light output of the light-emitting unit will improve the S / N ratio, but will also increase power consumption.

[0006] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a biosensor that can realize a large-area substrate while bringing the light-emitting element and the light-receiving element close to the living body to be detected, and a bioinformation detection device equipped with this biosensor.

[0007] (1) A biosensor as an example of the present disclosure includes a housing having a convex curved surface protruding in a first direction and a substrate disposed inside the housing, the biosensor being used with the first direction of the housing facing a living organism, the substrate having a first portion and a second portion that are positioned differently in the first direction, and a protruding portion disposed between the first portion and the second portion, causing the first portion to protrude from the second portion in the first direction. The surface opposite the protruding portion (back surface) is recessed. A biosensor is disposed on a surface of the first portion that is perpendicular to the first direction.

[0008] (2) A biological information detection device as an example of the present disclosure is a device including the biological sensor and a processing unit that processes detection information of the biological sensor.

[0009] According to the biosensor of the present invention, a housing having a convex curved surface protruding in a first direction and a substrate arranged inside the housing can be used with the first direction of the housing facing the living organism, and the substrate has a first part and a second part that are positioned differently in the first direction, and a protruding part that is arranged between the first part and the second part and causes the first part to protrude in the first direction from the second part, and a light-emitting element and a light-receiving element are arranged on the first-direction surface of the first part, so that a biosensor and a bioinformation detection device equipped with this biosensor can be constructed that can realize a substrate with a large area while bringing the light-emitting element and the light-receiving element close to the living organism to be detected.

[0010] FIG. 1 is a perspective view of a substrate constituting a part of a biosensor according to the first embodiment. FIG. 2 is a half-sectional view of a biosensor 100 configured by covering the substrate 1, light-emitting element 31, and light-receiving elements 32A and 32B shown in FIG. 1 with a housing 2. FIG. 3 is a cross-sectional view showing the state in which the biosensor 100 is used on a living body HB. FIG. 4 is a block diagram showing the electrical circuit configuration of a bioinformation detection device 101. FIG. 5 is a half-sectional view of the biosensor 100 according to the second embodiment. FIG. 6 is a partially enlarged cross-sectional view of the biosensor 100 according to the second embodiment. FIG. 7(A) is a perspective view of a substrate 1 constituting a part of a biosensor according to a third embodiment. FIG. 7(B) is a cross-sectional view taken along the X-Z plane at a position passing through the center of the substrate 1. FIG. 8 is a perspective view of a substrate 1 constituting a part of a biosensor 100 according to a fourth embodiment. FIG. 9(A) is a cross-sectional view showing a state in which the housing 2 and the substrate 1 are separated. FIG. 9(B) is a cross-sectional view showing a state in which the substrate 1 is integrated with the housing 2. FIG. 10 is a perspective view of a substrate 1 constituting a part of a biosensor according to a fifth embodiment. FIG. 11 is a cross-sectional view showing the positional relationship between the substrate 1 and the housing 2. FIG. 12(A) is a perspective view of the substrate 1 constituting part of the biosensor according to the sixth embodiment. FIG. 12(B) is a cross-sectional view taken along the X-Z plane at a position passing through the center of the substrate 1. FIG. 13 is a perspective view of the substrate 1 according to the seventh embodiment. FIG. 14 is a cross-sectional view of the biosensor 100 including the substrate 1 and housing 2 shown in FIG. 13. FIG. 15 is a perspective view of the substrate 1 according to the eighth embodiment. FIG. 16 is a perspective view of the substrate 1 according to the ninth embodiment. FIG. 17 is a cross-sectional view of the biosensor 100 including the substrate 1 and housing 2 shown in FIG. 16. FIG. 18 is a diagram showing the bioinformation detection device 101 worn on the left wrist of a human body. FIG. 19(A) is a side view of the substrate 1, which is part of the biosensor housed in the bioinformation detection device, and FIG. 19(B) is a perspective view of the substrate 1. FIG. 20 is a cross-sectional view of the bioinformation detection device 101.

[0011] A first aspect of the present invention provides a biosensor that includes a housing having a convex curved surface that protrudes in a first direction and a substrate disposed inside the housing, the biosensor being used with the first direction of the housing facing a living organism. The substrate has a first section and a second section that are positioned differently in the first direction, and a protruding section that is disposed between the first section and the second section and causes the first section to protrude in the first direction beyond the second section. A light-emitting element and a light-receiving element are disposed on the surface of the first section that faces in the first direction. The light-receiving element and the light-emitting element are used to detect bioinformation.

[0012] A biological information detection device according to a second aspect of the present invention includes the biological sensor and a processing unit that processes detection information from the biological sensor.

[0013] Hereinafter, several specific examples will be given with reference to the drawings to illustrate multiple embodiments for carrying out the present invention. The same reference numerals are used for the same parts in each drawing. For ease of explanation and understanding of the main points, the embodiments are shown divided into multiple embodiments for convenience of explanation, but partial substitution or combination of the configurations shown in different embodiments is possible. From the second embodiment onwards, a description of matters common to the first embodiment will be omitted, and only the differences will be described. In particular, similar effects resulting from similar configurations will not be mentioned in each embodiment.

[0014] First Embodiment Fig. 1 is a perspective view of a substrate constituting a part of a biosensor according to a first embodiment. Fig. 1 shows a substrate 1, a light-emitting element 31, and light-receiving elements 32A and 32B mounted on the substrate 1. The substrate 1 is circular when viewed in the Z direction. The Z direction corresponds to the "first direction" according to the present invention.

[0015] The substrate 1 has a first portion 11 and a second portion 12 that are positioned at different positions in the Z direction, and a protruding portion 13 that is provided between the first portion 11 and the second portion 12 and causes the first portion 11 to protrude from the second portion 12 toward the first portion 11. The surface opposite the surface of the protruding portion 13 (back surface) is recessed. A curved surface portion 14 is formed around the periphery of the second portion 12. In this example, the surface opposite the surface of the curved surface portion 14 (back surface) is recessed.

[0016] The substrate 1 is a multilayer substrate made up of a liquid crystal polymer layer and a conductor pattern layer that are compatible with high-frequency signals, for example, 5 GHz. This substrate 1 is formed by, for example, hot-pressing a flat multilayer substrate using a mold, as shown in FIG. 1 . Here, since the substrate 1 comprises multiple layers of thermoplastic resin, it is easy to cause plastic deformation by hot-pressing using a mold. Among thermoplastic resins, liquid crystal polymers are particularly excellent in high-frequency characteristics, making them suitable for use in this embodiment.

[0017] The light-emitting element 31 and the light-receiving elements 32A and 32B correspond to the "biodetection element" according to the present invention. The light-emitting element 31 and the light-receiving elements 32A and 32B are arranged on a plane perpendicular to the Z direction (i.e., the XY plane) of the first part 11. The light-emitting element 31 is, for example, an LED, a VCSEL (Vertical Cavity Surface Emitting Laser), or a resonator-type LED, and the light-receiving elements 32A and 32B are photodiodes or phototransistors.

[0018] Fig. 2 is a half cross-sectional view of the biosensor 100 configured by covering the substrate 1, the light-emitting element 31, and the light-receiving elements 32A and 32B shown in Fig. 1 with the housing 2. The example in Fig. 2 is a cross-sectional view taken along the X-Z plane at a position passing through the center of the biosensor 100.

[0019] As shown in FIG. 2 , the biosensor 100 includes a housing 2 having a convex curved surface CS protruding in the Z direction and a substrate 1 disposed inside the housing 2. The housing 2 includes an optical window 21 positioned opposite the light-emitting element 31 and the light-receiving elements 32A and 32B. For example, a rectangular opening is formed in a portion of the housing 2, and the rectangular optical window 21 is fitted into the opening. The optical window 21 is made of a material that is translucent to the light emitted by the light-emitting element 31 and the light received by the light-receiving elements 32A and 32B. In contrast, the portions of the housing 2 other than the optical window 21 block or absorb the light emitted by the light-emitting element 31 and the light received by the light-receiving elements 32A and 32B. The portions of the housing 2 other than the optical window 21 are made of a black resin, for example, a resin mixed with a black resist composition.

[0020] The substrate 1 and the housing 2 are integrated by bonding the curved surface portion 14 of the substrate 1 to the inner surface of the curved surface CS of the housing 2 via an adhesive layer. The housing 2 may also be configured by providing a black coverlay on the surface of the resin.

[0021] The surface of the substrate 1 opposite the protruding direction of the first portion 11 is recessed, and the first component 41 is provided in the space of this recess. This allows the space within the thickness of the protruding portion of the first portion 11 of the substrate 1 to be effectively utilized. In other words, the increase in size of the substrate 1 and the entire biosensor due to the placement of the first component 41 on the surface opposite the protruding direction of the first portion 11 is reduced. Note that the first portion 11 is not limited to a simple electronic component such as an IC. The first component 41 may be mounted on at least a portion of the surface of the substrate 1 opposite the protruding direction of the first portion 11.

[0022] 3 is a cross-sectional view showing the biosensor 100 being used on a living body HB. In FIG. 3, hatching at the cross-sectional position is omitted to clarify the illustration of each part. As described above, the biosensor 100 is used with the Z direction of the housing 2 facing the living body. Light emitted from the light-emitting element 31 strikes a blood vessel BV in the living body HB, and a portion of the reflected light is received by one or both of the light-receiving elements 32A and 32B.

[0023] The housing 2 has a convex curved surface that protrudes in the first direction, such as a spherical surface or a hyperboloid with one sheet, but the opening of the housing 2 may be closed with a flat lid.

[0024] 4 is a block diagram showing the electrical circuit configuration of the biological information detection device 101. The light-emitting element 31 is connected to a drive circuit 33. The drive circuit 33 dynamically drives the light-emitting element 31. The light-receiving elements 32A and 32B are connected to an amplifier circuit 34. The amplifier circuit 34 amplifies the intensity of the light-receiving signals from the light-receiving elements 32A and 32B. An arithmetic processing circuit 35 is connected to the drive circuit 33 and the amplifier circuit 34. The arithmetic processing circuit 35 processes predetermined biological sensor information, such as pulse rate and blood oxygen concentration, based on the drive processing of the light-emitting element 31 by the drive circuit 33 and the light-receiving signal output by the amplifier circuit 34, and outputs the information to the outside.

[0025] The characteristic features of the biosensor and bioinformation detecting device described in the first embodiment are as follows.

[0026] The substrate 1 is a three-dimensional laminated substrate in which the substrate 1 is three-dimensionally deformed. The light-emitting element 31 and the light-receiving elements 32A and 32B are mounted on the first portion 11, which is a convex portion. A protrusion 13 is formed around the periphery of the first portion 11, which is a convex portion. As a result, (a) the entire internal space of the housing 2 can be integrated. (b) The distance between the light-emitting element 31 and the light-receiving elements 32A and 32B and the living body can be shortened, thereby improving the S / N ratio of the optical signal. (c) The protrusion 13 can increase the rigidity of the first portion 11. Furthermore, since the area of ​​the substrate 1 can be expanded, the area available for wiring and the area for component mounting can be expanded.

[0027] Furthermore, since the substrate 1 has the curved surface portion 14 that fits along the curved surface of the housing 2, the rigidity of the entire substrate 1 including the curved surface portion 14 can be increased.

[0028] As described above, according to this embodiment, the light emitting element 31 and the light receiving elements 32A and 32B can be placed close to the biological detection target, and a substrate 1 with a large substrate area can be used.

[0029] Second Embodiment In a second embodiment, a biosensor including a second component other than the first component shown in the first embodiment will be exemplified.

[0030] Fig. 5 is a half cross-sectional view of the biosensor 100 according to the second embodiment. The example of Fig. 5 is a cross-sectional view taken along the XZ plane at a position passing through the center of the biosensor 100.

[0031] The structure of the housing 2 of the biosensor 100 according to the second embodiment is the same as that of the housing 2 in the first embodiment shown in Fig. 2. A second component 42 is provided on the surface of the substrate 1 in the protruding direction of the first part 11. In other words, the second component 42 has at least a portion mounted on the surface of the substrate 1 in the protruding direction, and the other configurations are the same as those of the biosensor 100 shown in the first embodiment.

[0032] Figure 6 is a partially enlarged cross-sectional view of a biosensor 100 according to the second embodiment. Figure 6 particularly shows the electrical circuit connection relationship between a first component 41 and a second component 42. In this example, the substrate 1 is a multilayer substrate, and some terminals of the first component 41, which is an IC, are electrically connected to terminals of the substrate 1. Similarly, terminals of the second component 42, which is a chip component, are electrically connected to terminals of the substrate 1. As a result, the terminals of the first component 41 are connected to the second component 42 via inner layer wiring 18 within the substrate 1.

[0033] According to this embodiment, the space in the thickness of the protruding portion of the first portion 11 of the substrate 1 is effectively utilized. That is, the increase in size of the substrate 1 and the entire biosensor caused by disposing the second component 42 in the first portion 11 is reduced.

[0034] Third Embodiment In a third embodiment, an example will be shown in which the shape of the substrate included in the biosensor 100 shown in the first and second embodiments is different.

[0035] FIG. 7A is a perspective view of a substrate 1 constituting a part of a biosensor according to a third embodiment. FIG. 7B is a cross-sectional view taken along the X-Z plane at a position passing through the center of the substrate 1. In FIG. 7B, hatching at the cross-sectional position of the substrate 1 is omitted to clarify the illustration of each part. The substrate 1 is equipped with a light-emitting element 31 and light-receiving elements 32A and 32B. The outer shape of the substrate 1 is circular when viewed in the Z direction. The substrate 1 has a first portion 11 and a second portion 12 that are positioned differently in the Z direction, and a protrusion 13 that is provided between the first portion 11 and the second portion 12 and causes the first portion 11 to protrude from the second portion 12 toward the first portion 11.

[0036] 1, the outer shape of the first portion 11 and the protruding portion 13 are circular when viewed from the Z direction. In this way, the first portion 11 may also be circular, like the second portion 12. Furthermore, the second portion 12 may be rectangular, and the curved surface portion 14 may also be rectangular.

[0037] Fourth Embodiment In a fourth embodiment, an example in which the shape of the substrate included in the biosensor shown in the third embodiment is different will be described.

[0038] 8 is a perspective view of a substrate 1 that constitutes a part of a biosensor 100 according to the fourth embodiment. In this example, openings 16A and 16B are formed in a protruding portion 13 of the substrate 1.

[0039] Fig. 9(A) is a cross-sectional view of the housing 2 and the substrate 1 in a separated state. Fig. 9(B) is a cross-sectional view of the housing 2 and the substrate 1 in an integrated state. Engagement portions 22A and 22B are formed on the housing 2. These engagement portions 22A and 22B engage with openings 16A and 16B formed in the substrate, respectively, thereby integrating the housing 2 and the substrate 1.

[0040] According to this embodiment, there is no need to bond the curved surface 14 of the substrate 1 to the inner curved surface of the housing 2 via an adhesive layer, thereby reducing the overall weight. Furthermore, the rotational positions of the substrate 1 and the housing 2 in the direction of the rotation axis can be aligned by the engagement portions 22A, 22B of the housing 2 and the openings 16A, 16B of the substrate. Therefore, stable optical characteristics can be obtained even if the optical window 21 is rectangular.

[0041] Fifth Embodiment In a fifth embodiment, an example in which the shape of the first portion of the substrate is different from that shown in the previous embodiments will be described.

[0042] Fig. 10 is a perspective view of a substrate 1 that constitutes a part of a biosensor according to the fifth embodiment. Fig. 11 is a cross-sectional view showing the positional relationship between the substrate 1 and the housing 2. In this example, protrusion-shaped portions 15A and 15B are formed on a first portion 11 of the substrate 1. A light-emitting element 31 and light-receiving elements 32A and 32B are mounted on the first portion 11, and the protrusion heights of the protrusion-shaped portions 15A and 15B are equal to the heights of the light-emitting element 31 and the light-receiving elements 32A and 32B, or are high enough so that they do not come into contact with the housing 2.

[0043] According to this embodiment, it is possible to stabilize the gap between the light-emitting element 31 and the light-receiving elements 32A and 32B and the optical window 21 of the housing. Furthermore, the light-emitting element 31 and the light-receiving elements 32A and 32B do not come into direct contact with the housing 2, which makes it possible to avoid mechanical stress being applied to the light-emitting element 31 and the light-receiving elements 32A and 32B.

[0044] Sixth Embodiment In a sixth embodiment, an example in which the shape of the first portion of the substrate is different from that shown in the previous embodiments will be described.

[0045] Fig. 12(A) is a perspective view of a substrate 1 constituting a part of a biosensor according to the sixth embodiment. Fig. 12(B) is a cross-sectional view taken along the X-Z plane at a position passing through the center of the substrate 1. In Fig. 12(B), hatching at the cross-sectional position of the substrate 1 is omitted to clarify the illustration of each part.

[0046] A protruding portion 17 is formed on the first portion 11. A light-emitting element 31 is mounted on the upper surface of this protruding portion 17. Light-receiving elements 32A and 32B are mounted on a portion of the first portion 11 where no protruding portion 17 is formed. Therefore, the light-emitting portion of the light-emitting element 31 is located at a higher height from the first portion 11 than the light-receiving portions of the light-receiving elements 32A and 32B.

[0047] According to this embodiment, almost no light emitted from the light-emitting element 31 directly enters the light-receiving elements 32A and 32B. In other words, no unnecessary light leaks from the light-emitting element 31 and enters the light-receiving elements 32A and 32B. This reduces unnecessary optical paths from the light-emitting element 31 to the light-receiving elements 32A and 32B, thereby improving the S / N ratio of the biological signal.

[0048] The light receiving elements 32A and 32B may be mounted on the upper surface of the protruding portion, and the light receiving portions of the light receiving elements 32A and 32B may be higher than the light emitting portion of the light emitting element 31.

[0049] Seventh Embodiment In the seventh embodiment, a biosensor having a coil pattern on a substrate 1 will be exemplified.

[0050] Fig. 13 is a perspective view of the substrate 1 according to the seventh embodiment. Fig. 14 is a cross-sectional view of a biosensor 100 including the substrate 1 and the housing 2 shown in Fig. 13 .

[0051] In this example, a first coil pattern 51 is formed or mounted on the upper surface of the second portion 12 of the substrate 1. Also, a second coil pattern 52 is formed or mounted on the curved surface portion 14 of the substrate 1.

[0052] The first coil pattern 51 is a substantially square-shaped conductor pattern made up of multiple turns, but the coil conductor patterns are not shown individually in Fig. 13, and the external appearance is shown as a single unit. The first component 41 shown in Fig. 14 is not an IC but a square plate-shaped magnetic material. This magnetic material acts as a high-permeability magnetic core for the first coil pattern 51, and the first coil pattern 51 is used, for example, as a coil for wireless power reception.

[0053] The second coil pattern 52 is a spiral conductor pattern with multiple turns and is used, for example, as a communication antenna. For example, one end of the second coil pattern is connected to a communication circuit, and the other end is left open.

[0054] According to this embodiment, the curved surface portion 14 of the substrate 1 can also be effectively used as part of the electrical circuit.

[0055] Eighth Embodiment In the eighth embodiment, a biosensor including a first component, a second component, and a second coil pattern on a substrate 1 will be exemplified.

[0056] 15 is a perspective view of a substrate 1 according to the eighth embodiment. In this example, a second component 42, which is a chip component, is mounted on the upper surface of the second portion 12 of the substrate 1. In addition, a second coil pattern 52 is formed or mounted on the curved surface portion 14 of the substrate 1. In this manner, the second component 42 shown in the second embodiment may be provided on the second portion 12 of the substrate 1, and the second coil pattern 52 shown in the seventh embodiment may be provided on the curved surface portion 14.

[0057] Ninth Embodiment In the ninth embodiment, a substrate without a curved surface and a biosensor including the substrate will be exemplified.

[0058] Fig. 16 is a perspective view of the substrate 1 according to the ninth embodiment. Fig. 17 is a cross-sectional view of a biosensor 100 including the substrate 1 and the housing 2 shown in Fig. 16 .

[0059] 16, the substrate 1 has a first portion 11 and a second portion 12 that are positioned at different positions in the Z direction, and a protruding portion 13 that is provided between the first portion 11 and the second portion 12 and causes the first portion 11 to protrude from the second portion 12 toward the first portion 11. The first portion 11 of the substrate 1 is provided with a light-emitting element 31 and light-receiving elements 32A and 32B. The substrate 1 does not have the curved portion 14 shown in FIG.

[0060] 17 , the biosensor 100 has a housing 2 having a convex curved surface that protrudes in the Z direction, and a substrate 1 disposed inside the housing 2. The housing 2 has an optical window 21 at a position facing the light-emitting element 31 and the light-receiving elements 32A and 32B. In this example, the opening of the housing 2 is sealed with a cover 4.

[0061] In this way, even if the device does not have a curved surface, it can be effectively housed in the housing 2 having a convex curved surface by utilizing the convex portion of the first portion 11 relative to the second portion 12.

[0062] Tenth Embodiment In a tenth embodiment, a biological information detection device including a biological sensor will be described as an example.

[0063] Fig. 18 is a diagram showing the state of the biological information detection device 101 worn on the left wrist of a human body. Fig. 19(A) is a side view of a substrate 1 which is part of a biosensor housed in the biological information detection device, and Fig. 19(B) is a perspective view of the substrate 1. Fig. 20 is a side view of the biological information detection device 101.

[0064] In the state shown in Fig. 18, the protruding portion of the housing 2 of the bioinformation detecting device 101 comes into contact with the living body. The substrate 1, which is part of the biosensor, includes a first portion 11, a second portion 12, a protruding portion 13, and a curved portion 14. An antenna is formed on the curved portion 14. As shown in Fig. 19(B), the curved portion 14 extends from a part of the second portion 12. This curved portion 14 is housed inside the band 6 shown in Fig. 20.

[0065] In the state shown in FIG. 18, the protruding portion of the housing 2 comes into contact with the living body, and for example, the pulse rate and blood oxygen concentration are measured and transmitted wirelessly via the antenna.

[0066] According to this embodiment, the curved surface portion 14 of the substrate 1 does not surround the entire periphery of the second portion 12 of the substrate 1 but exists only on a part of it, and therefore the curved surface portion 14 can be made flexible.

[0067] Finally, the present invention is not limited to the above-described embodiments. Those skilled in the art can make appropriate modifications and variations. The scope of the present invention is defined not by the above-described embodiments but by the claims. Furthermore, the scope of the present invention includes modifications and variations from the embodiments within the scope of the claims and their equivalents.

[0068] For example, a light receiving element may be disposed in the center and a light emitting element may be disposed on one side of the light receiving element, or a single light receiving element and a plurality of light emitting elements may be disposed.

[0069] In addition, although an example has been shown in which the first coil pattern 51 and the second coil pattern 52 shown in Figure 13 and the second coil pattern 52 shown in Figure 15 are arranged on the surface of the substrate 1, these coil patterns may also be formed on the underside (back surface) or inside of the substrate 1.

[0070] The electronic component mounting device and the parts feeder of the present invention may be provided in the following aspects.

[0071] <1> A biosensor having a housing with a convex curved surface protruding in a first direction and a substrate arranged inside the housing, the biosensor being used with the first direction of the housing facing a living organism, wherein the substrate has a first part and a second part that are positioned differently in the first direction, and a protruding part that is provided between the first part and the second part and causes the first part to protrude from the second part in the first direction, the back surfaces of the first part and the protruding part are recessed, and a biosensor having a living organism detection element arranged on a surface of the first part that is perpendicular to the first direction.

[0072] <2> The biosensor according to <1>, further comprising a first component at least part of which is mounted on a surface of the first portion opposite to the protrusion direction.

[0073] <3> The biosensor according to <1> or <2>, further comprising a second component at least partly mounted on a surface of the second portion in the direction of the protrusion.

[0074] <4> The biosensor according to any one of <1> to <3>, wherein the substrate has a curved surface portion that fits along the curved surface of the housing, and has a multilayer wiring portion formed on the curved surface portion.

[0075] <5> The biosensor described in any one of <1> to <4>, wherein an opening is formed in the protruding portion of the substrate, an engaging portion is formed in the housing, and the opening and the engaging portion integrate the substrate with the housing.

[0076] <6> The biosensor according to any one of <1> to <5>, comprising: a magnetic body arranged on a surface opposite to the direction of the protrusion of the first part; and a first coil pattern in the second part that winds along the surface of the second part.

[0077] <7> The biosensor according to any one of <1> to <6>, further comprising: a second coil pattern that winds along the curved surface.

[0078] <8> The biosensor according to any one of <1> to <7>, wherein the substrate includes a plurality of layers of thermoplastic resin.

[0079] <9> The biosensor according to <8>, wherein the thermoplastic resin is a liquid crystal polymer.

[0080] <10> The biosensor according to any one of <1> to <9>, wherein the first portion has a protrusion-shaped portion that protrudes in the first direction, and the protrusion-shaped portion contacts the housing.

[0081] <11> The biosensor according to any one of <1> to <10>, wherein the biodetection element is composed of a light-emitting element and a light-receiving element, the first part has a protruding portion that protrudes in the first direction, and the protruding portion optically separates the light-emitting element and the light-receiving element.

[0082] <12> The biosensor according to <11>, wherein the light-emitting element is any one of an LED, a VCSEL, and a resonator-type LED, and the light-receiving element is a photodiode or a phototransistor.

[0083] <13> A biological information detection device including the biological sensor according to any one of <1> to <12> and a processing unit that processes detection information of the biological sensor.

[0084] BV...blood vessel CS...curved surface HB...living body Z...first direction 1...substrate 2...housing 4...cover 6...band 11...first part 12...second part 13...projection part 14...curved part 15A, 15B...projection-shaped part 16A, 16B...opening 17...projection-shaped part 18...inner layer wiring 21...optical window 22A, 22B...engagement part 31...light-emitting element 32A, 32B...light-receiving element 33...drive circuit 34...amplification circuit 35...arithmetic processing circuit 41...first component 42...second component 51...first coil pattern 52...second coil pattern 100...biosensor 101...biological information detection device

Claims

1. a housing having a convex curved surface protruding in a first direction; and a substrate disposed inside the housing, the biosensor being used with the first direction of the housing facing a living organism; the substrate has a first portion and a second portion that are positioned differently in the first direction, and a protruding portion that is provided between the first portion and the second portion and causes the first portion to protrude from the second portion in the first direction, and back surfaces of the first portion and the protruding portion are recessed, A biosensor in which a biodetection element is arranged on a plane of the first part that is orthogonal to the first direction.

2. a first component at least part of which is mounted on a surface opposite to the direction of the protrusion of the first portion; The biosensor according to claim 1 .

3. a second component at least part of which is mounted on a surface of the second part in the direction of the protrusion; The biosensor according to claim 1 or 2.

4. the substrate has a curved surface portion that conforms to the curved surface of the housing, and has a multilayer wiring portion formed on the curved surface portion; The biosensor according to claim 1 or 2.

5. An opening is formed in the protruding portion of the substrate, An engagement portion is formed on the housing, The opening and the engagement portion integrate the substrate with the housing. The biosensor according to claim 1 or 2.

6. a magnetic body disposed on an opposite surface of the first portion with respect to the protruding direction; a first coil pattern wound around the second portion along a surface of the second portion; The biosensor according to claim 1 or 2.

7. a second coil pattern that winds along the curved surface, The biosensor according to claim 1 or 2.

8. the substrate comprises multiple layers of thermoplastic resin; The biosensor according to claim 1 or 2.

9. The thermoplastic resin is a liquid crystal polymer. The biosensor according to claim 8 .

10. the first portion has a protrusion-shaped portion that protrudes in the first direction, and the protrusion-shaped portion contacts the housing; The biosensor according to claim 1 or 2.

11. the biological detection element is composed of a light emitting element and a light receiving element, the first portion has a protruding portion that protrudes in the first direction, the protruding portion optically separates the light emitting element from the light receiving element; The biosensor according to claim 1 or 2.

12. the light-emitting element is any one of an LED, a VCSEL, and a resonator-type LED; the light receiving element is a photodiode or a phototransistor; The biosensor according to claim 11.

13. A biological information detection device comprising: the biological sensor according to claim 1 or 2; and a processing unit that processes detection information of the biological sensor.