Moisture Measuring Device

Abstract

A moisture measurement device according to an embodiment of the present invention comprises: a biological sensor (11) having a sensor surface (12) that acquires biological information; a processing unit (21) that processes the biological information acquired by the biological sensor; a substrate (22) having a first main surface (PS1) to which the processing unit is mounted; a housing (2) in which the biological sensor (11), the processing unit (21), and the substrate (22) are accommodated; and one or more attachments sections (40, 50) that are arranged on the first main surface (PS1) side of the substrate and attach the substrate (22) to the housing (2). When viewed from a direction (the Z-direction) orthogonal to the first main surface (PS1) of the substrate, the total area of one or more overlap areas (R1, R2) in which the one or more attachment sections (40, 50) and the substrate (22) overlap in the first main surface (PS1) of the substrate is smaller than the sensor area of the sensor surface (12) of the biological sensor.

Description

[Technical field]

[0001] The present invention relates to a moisture measuring device. [Background technology]

[0002] An oral moisture measuring device is disclosed in Patent Document 1. The oral moisture measuring device described in Patent Document 1 includes a swinging member, a moisture content detector provided at the tip of the swinging member, and a biasing member that biases the swinging member in one swing direction. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2015 / 125222 Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, there has been a demand for moisture measuring devices with improved measurement accuracy. [Means for solving the problem]

[0005] The moisture measuring device according to one embodiment of the present invention comprises: a biosensor having a sensor surface for acquiring biometric information; A processing unit that processes the bioinformation acquired by the biosensor; A substrate having a first main surface on which the processing unit is mounted; a housing that houses the biosensor, the processing unit, and the substrate; one or more mounting portions arranged on the first main surface side of the substrate and configured to mount the substrate to the housing; Equipped with When viewed from a direction perpendicular to the first main surface of the substrate, the total area of ​​one or more overlapping regions on the first main surface of the substrate where the one or more mounting portions overlap with the substrate is smaller than the sensor area of ​​the sensor surface of the biosensor. Effect of the Invention

[0006] According to the present invention, it is possible to provide a moisture measuring device with improved measurement accuracy. [Brief description of the drawings]

[0007] [Figure 1] 1 is a schematic perspective view of an example of a moisture measuring device according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic bottom view of an example of the moisture measuring device according to the first embodiment of the present invention. [Diagram 3] FIG. 3 is a schematic enlarged view of a portion Z1 in FIG. 2. [Figure 4] 1 is a block diagram showing a schematic configuration of an example of a moisture measuring device according to a first embodiment of the present invention. [Diagram 5] FIG. 2 is a schematic exploded view of the sensor unit and the probe unit of FIG. [Figure 6] FIG. 2 is a schematic diagram for explaining a state in which a substrate is attached to a first housing. [Figure 7] FIG. 7 is a schematic enlarged view of a portion Z2 in FIG. 6. [Figure 8] FIG. 7 is a plan view of FIG. [Figure 9] FIG. [Figure 10] FIG. 9 is a schematic cross-sectional view taken along line AA in FIG. 8. [Figure 11] FIG. 2 is a schematic diagram showing the configuration of a moisture measuring device according to a first modified example. [Figure 12] FIG. 11 is a schematic diagram showing the configuration of a moisture measuring device according to Modification 2. [Figure 13] 13 is a schematic cross-sectional view taken along line BB in FIG. 12. [Figure 14] FIG. 13 is a schematic diagram showing the configuration of a moisture measuring device according to a third modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] (How the present invention was arrived at) As an example of a moisture measuring device, an oral moisture measuring device is known. The oral moisture measuring device acquires bioinformation related to the amount of moisture in the oral cavity by contacting a sensor surface of a biosensor with the oral cavity, and calculates the amount of moisture based on the acquired bioinformation.

[0009] In an oral moisture measuring device, in order to bring a biosensor into contact with the oral cavity, the biosensor is designed to be small enough to fit inside the oral cavity. Therefore, there is a limit to the size of the sensor surface of the biosensor. The amount of bioinformation acquired by the biosensor is proportional to the size of the sensor surface. In other words, as the size of the sensor surface becomes smaller, the amount of bioinformation that can be acquired also becomes smaller.

[0010] Therefore, in the oral moisture measuring device, due to the limitation of the size of the biosensor, the amount of bioinformation that can be obtained is small, and the moisture amount is calculated based on a small amount of bioinformation. For example, when measuring the moisture amount of a user whose oral cavity is relatively dry, the calculated moisture amount changes depending on the change in the amount of bioinformation on the pico or nano order. In this way, in the oral moisture measuring device, since the moisture amount is calculated based on a small amount of bioinformation, the generation of a small amount of noise may affect the measurement accuracy.

[0011] For example, if the biosensor is a capacitance sensor that detects capacitance, if noise occurs around a processing unit that processes the capacitance information acquired by the biosensor, the noise will make it impossible to calculate the moisture content with high accuracy. Therefore, it is necessary to suppress the noise from occurring around the processing unit.

[0012] As a result of intensive research, the inventors have discovered that capacitive coupling occurs between a member that contacts a board on which a processing unit is mounted and the board, and that the parasitic capacitance generated by the capacitive coupling is a cause of noise generation. Examples of members that contact the board include a mounting portion that mounts the board to a housing and a support portion that supports the board inside the housing.

[0013] Furthermore, even when the mounting portion and the support portion are made of a resin material, capacitive coupling occurs, and a minute amount of parasitic capacitance occurs. For example, when the processing unit converts the electrostatic capacitance into a frequency, an AC component occurs. The AC component is easily polarized with respect to the resin material and the polarity is separated. When the polarity is separated by polarization, a capacitor structure is formed with air between the member made of the resin material and the substrate. Therefore, even between the resin material and the substrate, a minute amount of capacitive coupling occurs, and a minute amount of parasitic capacitance on the pico- or nano-order may occur as noise. In the moisture measuring device, such a minute amount of noise may reduce the moisture measurement accuracy.

[0014] Therefore, the present inventors have discovered a configuration for suppressing the generation of noise in order to improve measurement accuracy, and have arrived at the following invention.

[0015] A moisture measuring device of one embodiment of the present invention comprises a biosensor having a sensor surface for acquiring bioinformation, a processing unit for processing the bioinformation acquired by the biosensor, a substrate having a first main surface on which the processing unit is mounted, a housing for housing the biosensor, the processing unit and the substrate, and one or more mounting parts arranged on the first main surface side of the substrate for attaching the substrate to the housing, wherein when viewed from a direction perpendicular to the first main surface of the substrate, the total area of ​​one or more overlapping regions on the first main surface of the substrate where the one or more mounting parts overlap with the substrate is smaller than the sensor area of ​​the sensor surface of the biosensor.

[0016] With this configuration, the measurement accuracy can be improved.

[0017] A conductor portion including a wiring pattern may be formed on the first main surface of the substrate, and a total area of ​​the one or more overlapping regions may be smaller than a total area of ​​the conductor portion.

[0018] With this configuration, the measurement accuracy can be further improved.

[0019] The one or more mounting portions may be made of resin.

[0020] With this configuration, noise generated at one or more mounting portions can be suppressed, further improving measurement accuracy.

[0021] The one or more attachment portions may include one or more screws having a threaded head.

[0022] With this configuration, the substrate can be firmly attached to the housing and the generation of noise can be suppressed, thereby improving the measurement accuracy.

[0023] The one or more mounting portions may include one or more engaging claws, and the one or more engaging claws may be provided inside the housing and have a protrusion that protrudes from the outside toward the inside of the substrate on the first main surface side of the substrate.

[0024] With this configuration, the substrate can be easily attached to the housing and the generation of noise can be suppressed, thereby improving the measurement accuracy.

[0025] The one or more engagement claws may be spaced apart from the first main surface of the substrate.

[0026] With this configuration, for example, even if the moisture measuring device receives an impact due to being dropped, damage to the substrate can be suppressed.

[0027] A distance between the one or more engagement claws and the first main surface of the substrate may be greater than or equal to 1 / 10 and less than or equal to 1 / 2 of a thickness of the substrate.

[0028] With this configuration, even if the moisture measuring device receives an impact, damage to the substrate can be further suppressed.

[0029] The substrate may have a longitudinal direction and a lateral direction, and the plurality of engagement claws may be disposed at both ends of the substrate in the lateral direction.

[0030] With this configuration, the board can be firmly attached to the housing, and the board can be prevented from coming off the housing.

[0031] The plurality of engaging claws may be arranged at intervals in the longitudinal direction of the base plate.

[0032] With this configuration, when a force such as an impact is applied to the housing, it is possible to prevent the board from twisting and coming off the housing.

[0033] The multiple engagement claws may include a first engagement claw arranged between the biosensor and the processing unit in the longitudinal direction of the substrate, and a second engagement claw arranged on the opposite side to the side on which the first engagement claw is arranged in the short direction of the substrate, and arranged at a position closer to the processing unit than the first engagement claw in the longitudinal direction of the substrate.

[0034] With this configuration, the substrate can be firmly attached to the housing and the generation of noise can be further suppressed, thereby further improving the measurement accuracy.

[0035] The substrate may have a second main surface opposite to the first main surface, the housing may have a support portion that partially supports the second main surface, and a space may be formed between the housing and the substrate.

[0036] This configuration reduces the area of ​​capacitive coupling between the housing and the board, suppressing the generation of noise, thereby improving measurement accuracy.

[0037] The one or more attachment portions may be disposed at a position farther from the biosensor than the processing portion.

[0038] With this configuration, it is possible to prevent noise generated at one or more attachment parts from entering the processing part, thereby improving the measurement accuracy.

[0039] A distance between the one or more mounting portions and the processor may be greater than a distance between the biosensor and the processor.

[0040] With this configuration, it is possible to further prevent noise generated at one or more attachment parts from entering the processing part, thereby further improving the measurement accuracy.

[0041] The biosensor may be a capacitance sensor that detects capacitance, and the processing unit may convert the capacitance detected by the capacitance sensor into a frequency.

[0042] With this configuration, the measurement accuracy can be further improved.

[0043] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. Note that the following description is merely illustrative in nature and is not intended to limit the present disclosure, its application, or its uses. Furthermore, the drawings are schematic, and the ratios of dimensions do not necessarily correspond to the real ones.

[0044] Furthermore, terms such as "first," "second," "third," and "fourth" in the specification are used for convenience to distinguish components, and are not limited to these.

[0045] (Embodiment 1) [Overall configuration] Fig. 1 is a schematic perspective view of an example of a moisture measuring device 1A according to a first embodiment of the present invention. Fig. 2 is a schematic bottom view of an example of the moisture measuring device 1A according to the first embodiment of the present invention. Fig. 3 is a schematic enlarged view of a Z1 portion in Fig. 2. The X, Y, and Z directions in the figure respectively indicate the width, length, and height directions of the moisture measuring device 1A. In Fig. 3, the area indicated by diagonal hatching indicates the sensor surface 12.

[0046] In the first embodiment, an example will be described in which the moisture measuring device 1A is a moisture measuring device (oral moisture meter) that measures moisture in the oral cavity.

[0047] <Appearance> The appearance of the moisture measuring device 1A will be described. As shown in Fig. 1 and Fig. 2, the moisture measuring device 1A includes a housing 2. The housing 2 has a rod-like shape with a longitudinal direction D1. Specifically, the housing 2 includes a sensor section 10, a probe section 20, and a grip section 30.

[0048] The sensor unit 10 is a part that comes into contact with a measurement site of a living body. The measurement site of a living body is, for example, a site in the oral cavity. The site in the oral cavity is, for example, the tongue. The sensor unit 10 is provided at one end E1 in the longitudinal direction D1 of the moisture measuring device 1A. The external dimensions of the sensor unit 10 are designed to be smaller than those of the probe unit 20 and the gripping unit 30. For example, the dimensions in the X direction and the Y direction of the sensor unit 10 are designed to be smaller than those of the probe unit 20 and the gripping unit 30.

[0049] 2 and 3, the sensor unit 10 has a contact surface 10a that comes into contact with a measurement site of a living body. The contact surface 10a is provided on one end E1 side of the longitudinal direction D1 of the housing 2, and is provided in a direction (X and Y directions) intersecting with the end face on the one end E1 side. A sensor surface 12 of the biosensor 11 is exposed on the contact surface 10a.

[0050] The probe section 20 connects the sensor section 10 and the grip section 30. The probe section 20 is formed in a rod shape. The dimensions of the probe section 20 in the X direction and the Z direction become smaller from the grip section 30 toward the sensor section 10. That is, the probe section 20 has a shape that tapers from the grip section 30 toward the sensor section 10.

[0051] The grip portion 30 is a portion that is gripped by a user. The grip portion 30 is provided at the other end E2 in the longitudinal direction D1 of the moisture measuring device 1A. The grip portion 30 is formed in a rod shape. The outer dimensions of the grip portion 30 are designed to be larger than those of the sensor portion 10 and the probe portion 20. For example, the dimensions of the grip portion 30 in the X, Y, and Z directions are designed to be larger than those of the sensor portion 10 and the probe portion 20.

[0052] The housing 2 is made of, for example, resin. Also, a part of the housing 2 may be made of metal.

[0053] Next, a functional configuration of the moisture measuring device 1A will be described. Fig. 4 is a block diagram showing a schematic configuration of an example of the moisture measuring device 1A according to the first embodiment of the present invention. As shown in Fig. 4, the moisture measuring device 1A includes a biosensor 11, a processing unit 21, an operation display unit 31, and a calculation unit 32.

[0054] In the first embodiment, an example in which the moisture measuring device 1A includes the operation display unit 31 and the calculation unit 32 will be described, but the present invention is not limited to this. The operation display unit 31 and the calculation unit 32 are not essential components, and may be provided in a device separate from the moisture measuring device 1A.

[0055] <Biosensor> The biosensor 11 acquires bioinformation. The bioinformation is various physiological and anatomical information generated by a living body. The bioinformation is, for example, information such as capacitance, resistance value, and impedance. The biosensor 11 comes into contact with a measurement site of a living body and acquires the bioinformation of the measurement site in contact.

[0056] In the first embodiment, the biosensor 11 is a capacitance sensor. The biosensor 11 contacts a measurement site in the oral cavity and acquires capacitance information. In the first embodiment, the bioinformation acquired by the biosensor 11 is capacitance information.

[0057] 3, the biosensor 11 is disposed on the sensor unit 10. Specifically, the biosensor 11 is disposed on the contact surface 10a of the sensor unit 10. For example, the biosensor 11 is disposed in a recess provided on the housing 2 on the contact surface 10a side of the sensor unit 10.

[0058] The biosensor 11 is formed in a planar shape. Specifically, the biosensor 11 has a sensor surface 12 that acquires bioinformation. The sensor surface 12 is exposed on the contact surface 10a side of the sensor unit 10. For example, the sensor surface 12 is formed in a rectangular shape when viewed from the height direction (Z direction) of the moisture measuring device 1A. The sensor surface 12 detects bioinformation by coming into contact with a measurement site. That is, the biosensor 11 is Sensor surface 12 Biometric information is obtained by contacting the device with the measurement site.

[0059] The biological information acquired by the biological sensor 11 is transmitted to the processing unit 21.

[0060] <Processing section> The processing unit 21 processes the bioinformation acquired by the biosensor 11. Specifically, the processing unit 21 performs a conversion process on the bioinformation acquired by the biosensor 11, and outputs the converted information.

[0061] The processing unit 21 converts the analog information acquired by the biosensor 11 into digital information. In the first embodiment, the processing unit 21 has a frequency conversion circuit that converts the capacitance information acquired by the biosensor 11 into a frequency. For example, the processing unit 21 repeatedly charges and discharges the biosensor 11 regarded as a capacitance, and converts the information into a frequency with a period determined by the charging and discharging speed. For this reason, the processing unit 21 outputs the frequency value as the output value of the biosensor 11.

[0062] The processing unit 21 can be realized by a semiconductor element or the like. The processing unit 21 can be configured by, for example, a microcomputer, a CPU, an MPU, a GPU, a DSP, an FPGA, an ASIC, a discrete semiconductor, or an LSI. The functions of the processing unit 21 may be configured by hardware alone, or may be realized by combining hardware and software. The processing unit 21 realizes a predetermined function by reading data and programs stored in a storage unit (not shown) in the processing unit 21 and performing various arithmetic processing. The storage unit can be realized by, for example, a hard disk drive (HDD), an SSD, a RAM, a DRAM, a ferroelectric memory, a flash memory, a magnetic disk, or a combination of these.

[0063] The processing unit 21 converts the bioinformation acquired by the biosensor 11 and stores the converted information in the storage unit. The processing unit 21 transmits the information stored in the storage unit to the calculation unit 32. For example, the processing unit 21 transmits information to the calculation unit 32 based on trigger information for starting measurement. The trigger information for starting measurement may be generated based on input information input to the operation display unit 31, for example.

[0064] The processing unit 21 is disposed inside the probe unit 20. Specifically, the processing unit 21 is mounted on a substrate, which will be described later, and the substrate is held inside the probe unit 20. This makes it possible to shorten the distance between the processing unit 21 and the biosensor 11, thereby suppressing the generation of noise.

[0065] <Operation display section> The operation and display unit 31 receives input from the user and displays information on the moisture content. For example, the operation and display unit 31 includes an operation unit that receives operations from the user and a display unit that displays information.

[0066] The operation unit has one or more buttons for receiving input from a user. The buttons include, for example, a power button for switching the power ON / OFF.

[0067] The display unit displays the information on the moisture content. The display unit is, for example, a display. The information on the moisture content is, for example, transmitted from the calculation unit 32 to the display unit.

[0068] The operation display unit 31 is disposed on the upper surface of the grip unit 30 .

[0069] <Calculation section> The calculation unit 32 calculates the moisture content based on the information processed by the processing unit 21. Specifically, the calculation unit 32 receives information obtained by converting biological information from the processing unit 21, and calculates the moisture content based on the converted information. In the first embodiment, the calculation unit 32 receives information obtained by converting capacitance information into frequency from the processing unit 21, and calculates the moisture content based on the frequency information. The moisture content information calculated by the calculation unit 32 is transmitted to the operation display unit 31.

[0070] The calculation unit 32 can be realized by a semiconductor element or the like. The calculation unit 32 can be configured by, for example, a microcomputer, a CPU, an MPU, a GPU, a DSP, an FPGA, an ASIC, a discrete semiconductor, or an LSI. The function of the calculation unit 32 may be configured by hardware alone, or may be realized by combining hardware and software. The calculation unit 32 realizes a predetermined function by reading data and programs stored in a storage unit (not shown) in the processing unit 21 and performing various arithmetic processing. The storage unit can be realized by, for example, a hard disk drive (HDD), an SSD, a RAM, a DRAM, a ferroelectric memory, a flash memory, a magnetic disk, or a combination of these.

[0071] The calculation unit 32 is disposed inside the grip unit 30 .

[0072] The moisture measuring device 1A includes a control unit that performs overall control of the components that make up the moisture measuring device 1A. The control unit includes, for example, a memory that stores a program, and a processing circuit that corresponds to a processor such as a CPU (Central Processing Unit). For example, in the control unit, the processor executes the program stored in the memory. In the first embodiment, the control unit controls the biosensor 11, the processing unit 21, the operation display unit 31, and the calculation unit 32.

[0073] [Internal structure of the sensor and probe] Fig. 5 is a schematic exploded view of the sensor unit 10 and the probe unit 20 in Fig. 1. Fig. 6 is a schematic view for explaining a state in which the substrate 22 is attached to the first housing 3. Fig. 7 is a schematic enlarged view of the Z2 portion in Fig. 6. Fig. 8 is a plan view of Fig. 6. Fig. 9 is a schematic view showing the support portion 43. Fig. 10 is a schematic cross-sectional view taken along the line AA in Fig. 8.

[0074] As shown in FIGS. 5 to 8, the sensor section 10 and the probe section 20 of the moisture measuring device 1A are composed of a housing 2, a biosensor 11, a processing section 21, and a substrate 22. The housing 2 includes a first housing 3 and a second housing 4 connected to the first housing 3. The first housing 3 is the housing on the side on which the biosensor 11 is provided. The second housing 4 is the housing on the opposite side to the side on which the biosensor 11 is provided. The first housing 3 and the second housing 4 are connected to each other by, for example, fitting.

[0075] The substrate 22 is formed in a plate shape having a longitudinal direction (Y direction) and a lateral direction (X direction). The substrate 22 has a first main surface PS1 on the second housing 4 side. The first main surface PS1 is a surface on which components such as the processing unit 21, ICs, connectors, wiring patterns and / or electrodes are mounted. In this specification, the wiring patterns and / or electrodes are indicated as conductor parts 24.

[0076] A notch 23 is provided at both ends of the short side direction (X direction) of the substrate 22. The notch 23 is formed, for example, in a semicircular shape when viewed from a direction perpendicular to the first main surface PS1 of the substrate 22. A positioning pin 41, which will be described later, is disposed in the notch 23. In the first embodiment, two notches 23 are provided at both ends of the short side direction (X direction) of the substrate 22. The two notches 23 are provided at positions farther from the biosensor 11 than the processing unit 21 is when viewed from a direction perpendicular to the first main surface PS1 of the substrate 22.

[0077] The substrate 22 is disposed inside the housing 2. Specifically, the substrate 22 is attached to the first housing 3 inside the probe portion 20.

[0078] The first housing 3 has an attachment portion 40. The attachment portion 40 is a member that attaches the board 22 to the housing 2. Specifically, as shown in Fig. 6 and Fig. 7, the attachment portion 40 is disposed on the first main surface PS1 side of the board 22, and restricts the board 22 from moving in the thickness direction (Z direction) of the board 22. That is, the attachment portion 40 holds the board 22 to the housing 2.

[0079] In the first embodiment, the attachment portion 40 is formed of an engagement claw. The engagement claw is provided inside the housing 2, and has a protruding portion 42 that protrudes from the outside of the substrate 22 toward the inside on the side of the first main surface PS1 of the substrate 22. The protruding portion 42 overlaps with the substrate 22 when viewed from a direction perpendicular to the first main surface PS1 of the substrate 22 (Z direction). Therefore, when the substrate 22 moves in the thickness direction of the substrate 22 (Z direction), the first main surface PS1 of the substrate 22 comes into contact with the protruding portion 42. As a result, the movement of the substrate 22 in the thickness direction of the substrate 22 (Z direction) is restricted by the protruding portion 42, and the substrate 22 can be attached to the first housing 3. In this specification, the engagement claw may be indicated by the reference symbol 40.

[0080] As shown in FIG. 7, the direction perpendicular to the first main surface PS1 of the substrate 22 (Z direction) InThe engagement claw 40 is disposed away from the first main surface PS1 of the substrate 22. The distance between the engagement claw 40 and the first main surface PS1 of the substrate 22 is 0.1 to 0.5 times the thickness of the substrate 22. Specifically, a gap SP1 is provided between the protrusion 42 of the engagement claw 40 and the first main surface PS1 of the substrate 22. The gap SP1 is smaller than the thickness of the substrate 22. For example, the size of the gap SP1 is 0.1 to 0.5 times the thickness of the substrate 22. This makes it possible to prevent the substrate 22 from being damaged, for example, even if the moisture measuring device 1A is subjected to an impact due to being dropped or the like.

[0081] In the first embodiment, the first housing 3 has two mounting parts 40. As shown in FIG. 8, the two mounting parts 40 are disposed at both ends of the substrate 22 in the short-side direction (X direction). The two mounting parts 40 are disposed at an interval (P1) in the longitudinal direction (Y direction) of the substrate 22 when viewed from a direction perpendicular to the first main surface PS1 of the substrate 22. In this manner, the two mounting parts 40 are disposed offset in the longitudinal direction (Y direction) of the substrate 22. This makes it possible to prevent the substrate 22 from being twisted and coming off the mounting parts 40 even if the moisture measuring device 1A is subjected to an impact due to being dropped or the like.

[0082] Specifically, a first engagement claw 40 and a second engagement claw 40 are arranged on both ends of the substrate 22 in the short-side direction (X-direction). The first engagement claw 40 is arranged between the biosensor 11 and the processing unit 21 when viewed from a direction perpendicular to the first main surface PS1 of the substrate 22. The second engagement claw 40 is arranged on the opposite side to the side on which the first engagement claw 40 is provided in the short-side direction of the substrate 22. The second engagement claw 40 is also arranged at a position closer to the processing unit 21 than the first engagement claw 40 is in the longitudinal direction of the substrate 22.

[0083] 6 and 8, the first housing 3 has a positioning pin 41 that protrudes from inside the first housing 3 toward the substrate 22. The positioning pin 41 is disposed in the cutout 23 of the substrate 22 to position the substrate 22 in the first housing 3. The positioning pin 41 also restricts movement of the substrate 22 in directions (X direction, Y direction) perpendicular to the thickness direction of the substrate 22. The positioning pin 41 has, for example, a cylindrical shape.

[0084] In the first embodiment, the first housing 3 has two positioning pins 41.

[0085] 9 and 10, the first housing 3 has a plurality of support portions 43 that support the substrate 22. The plurality of support portions 43 partially support a second main surface PS2 of the substrate 22 opposite to the first main surface PS1.

[0086] "Partially supporting" means supporting a portion, rather than the entirety, of the second main surface PS2 of the substrate 22. For example, the multiple supporting portions 43 support both end portions of the substrate 22 in the longitudinal direction (Y direction) and both end portions of the substrate 22 in the lateral direction (X direction) at the center of the substrate 22 in the longitudinal direction (Y direction) when viewed from a direction (Z direction) perpendicular to the second main surface PS2 of the substrate 22.

[0087] The multiple support parts 43 are formed to protrude from the inner wall of the first housing 3 toward the second main surface PS2 of the substrate 22. The multiple support parts 43 are formed, for example, in a plate shape. The thickness of the multiple support parts 43 is, for example, approximately the same as the thickness of the substrate 22.

[0088] The multiple supports 43 partially support the second main surface PS2 of the substrate 22, thereby forming a space SP2 between the second main surface PS2 of the substrate 22 and the first housing 3. By forming the space SP2 between the second main surface PS2 of the substrate 22 and the first housing 3 in this manner, when an impact or the like is applied to the moisture measuring device 1A, the force can be distributed to the multiple supports 43.

[0089] [Configuration for suppressing noise generation] A configuration for suppressing noise generation in the moisture measuring device 1A will be described.

[0090] In the moisture measuring device 1A, the total area of ​​the overlap region R1 where the mounting portion 40 and the substrate 22 overlap is smaller than the sensor area of ​​the sensor surface 12 of the biosensor 11 when viewed from a direction perpendicular to the first main surface PS1 of the substrate 22 (Z direction).

[0091] 7, the "overlap region R1" refers to a region where the protrusion 42 of the mounting portion 40 and the substrate 22 overlap on the first main surface PS1 of the substrate 22 when viewed from a direction (Z direction) perpendicular to the first main surface PS1 of the substrate 22. In other words, it refers to a region of the mounting portion 40 projected onto the first main surface PS1 of the substrate 22 when viewed from a direction (Z direction) perpendicular to the first main surface PS1 of the substrate 22.

[0092] The "total area of ​​overlapping regions R1" refers to the total area of ​​multiple overlapping regions R1 formed by multiple mounting portions 40 on the first main surface PS1 of the substrate 22. In the first embodiment, the first housing 3 has two mounting portions 40, and therefore two overlapping regions R1 are formed. Therefore, the sum of the areas of the two overlapping regions R1 is the total area of ​​the overlapping regions R1.

[0093] 3, the "sensor area of ​​the sensor surface 12" refers to the surface area of ​​the sensor surface 12 when viewed from a direction (Z direction) perpendicular to the sensor surface 12. In the first embodiment, the area of ​​the sensor surface 12 is, for example, approximately 50 mm 2 It is.

[0094] In the moisture measuring device 1A, the total area of ​​the overlap region R1 is smaller than the sensor area of ​​the sensor surface 12 of the biosensor 11. With this configuration, it is possible to reduce the area where capacitive coupling occurs between the mounting portion 40 and the substrate 22, and to reduce the parasitic capacitance caused by the capacitive coupling.

[0095] Preferably, the total area of ​​the overlap region R1 is: base board 22 The "total area of ​​conductors 24" means the sum of the areas of conductors, including wiring patterns and / or electrodes, on first main surface PS1 of substrate 22, when viewed from a direction perpendicular to first main surface PS1 of substrate 22 (Z direction).

[0096] For example, the total area of ​​the overlap region R1 is equal to or greater than 0.01 times and less than 1 time the sensor area of ​​the sensor surface 12.

[0097] Furthermore, a gap SP1 is formed between the protrusion 42 of the mounting portion 40 and the first main surface PS1 of the substrate 22. This makes it possible to separate the mounting portion 40 and the substrate 22, thereby making it difficult for capacitive coupling to occur.

[0098] Furthermore, the second main surface PS2 side of the substrate 22 is partially supported by a plurality of supports 43, and between the second main surface PS2 of the substrate 22 and the first housing 3, a space SP2 is formed.

[0099] In this manner, by partially supporting the second main surface PS2 of the substrate 22 with the multiple supports 43, it is possible to reduce the contact area between the first housing 3 and the substrate 22. This makes it possible to reduce the area where capacitive coupling occurs between the first housing 3 and the substrate 22.

[0100] Moreover, when viewed from a direction (Z direction) perpendicular to the second main surface PS2 of the substrate 22, the multiple support parts 43 are provided at positions that do not overlap with the processing part 21. In the first embodiment, the processing part 21 is disposed near the center in the longitudinal direction (Y direction) of the substrate 22. Therefore, when viewed from a direction (Z direction) perpendicular to the second main surface PS2 of the substrate 22, the multiple support parts 43 support both end portions of the substrate 22 in the longitudinal direction (Y direction) and both end portions of the substrate 22 in the lateral direction (X direction) at the center of the longitudinal direction (Y direction) of the substrate 22. With this configuration, it is possible to suppress the generation of parasitic capacitance due to capacitive coupling around the processing part 21.

[0101] The mounting portion 40, the positioning pin 41, and the support portion 43 are made of a resin material. With this configuration, the parasitic capacitance generated by capacitive coupling can be made smaller than when the mounting portion 40, the positioning pin 41, and the support portion 43 are made of a metal material. This makes it possible to suppress the generation of noise.

[0102] [effect] The moisture measuring device 1A according to the first embodiment can provide the following effects.

[0103] The moisture measuring device 1A includes a biosensor 11, a processing unit 21, a substrate 22, a housing 2, and a plurality of attachment parts 40. The biosensor 11 has a sensor surface 12 that acquires bioinformation. The processing unit 21 processes the bioinformation acquired by the biosensor 11. The substrate 22 has a first main surface PS1 on which the processing unit 21 is mounted. The housing 2 houses the biosensor 11, the processing unit 21, and the substrate 22. The plurality of attachment parts 40 are disposed on the first main surface PS1 side of the substrate 22, and attach the substrate 22 to the housing 2. When viewed from a direction perpendicular to the first main surface PS1 of the substrate 22 (Z direction), the total area of ​​a plurality of overlapping regions R1 where the plurality of attachment parts 40 and the substrate 22 overlap on the first main surface PS1 of the substrate 22 is smaller than the sensor area of ​​the sensor surface 12 of the biosensor 11.

[0104] This configuration can improve the measurement accuracy of the moisture content. Specifically, by reducing the area where capacitive coupling occurs between the multiple mounting parts 40 and the substrate 22, the parasitic capacitance occurring between the multiple mounting parts 40 and the substrate 22 can be reduced. This can suppress noise occurring around the processing unit 21, and reduce the effect of noise on the data acquired by the biosensor 11. As a result, the measurement accuracy of the moisture measuring device 1A can be improved.

[0105] In the moisture measuring device 1A, a conductor portion 24 including a wiring pattern is formed on the first main surface PS1 of the substrate 22, and the total area of ​​the multiple overlapping regions R1 is smaller than the total area of ​​the conductor portion 24. With this configuration, the parasitic capacitance generated between the multiple mounting portions 40 and the substrate 22 can be further reduced, and the generation of noise can be further suppressed. This can further improve the measurement accuracy of the moisture measuring device 1A.

[0106] The mounting parts 40 are made of resin. With this configuration, capacitive coupling is less likely to occur between the mounting parts 40 and the substrate 22 than with a metal material. This makes it possible to further suppress the generation of noise, and further improve the measurement accuracy of the moisture measuring device 1A.

[0107] The multiple mounting portions 40 include multiple engagement claws 40, which are provided inside the housing 2 and have protrusions 42 that protrude from the outside of the substrate 22 toward the inside on the side of the first main surface PS1 of the substrate 22. With this configuration, the substrate 22 can be easily mounted to the housing 2, and the overlap region R1 can be made smaller. This makes it possible to further reduce the parasitic capacitance generated between the multiple mounting portions 40 and the substrate 22, and further suppress the generation of noise. This makes it possible to further improve the measurement accuracy of the moisture measuring device 1A.

[0108] The substrate 22 has a longitudinal direction (Y direction) and a lateral direction (X direction), and the multiple engagement claws 40 are disposed on both ends in the lateral direction of the substrate 22. With this configuration, it is possible to prevent the substrate 22 from coming off the housing 2.

[0109] The multiple engaging claws 40 are arranged at intervals P1 in the longitudinal direction (Y direction) of the substrate 22. This configuration makes it possible to prevent the substrate 22 from twisting and coming off the mounting part 40 when the moisture measuring device 1A receives an impact such as being dropped.

[0110] The substrate 22 has a second main surface PS2 opposite to the first main surface PS1. The housing 2 has a support portion 43 that partially supports the second main surface PS2. A space SP2 is formed between the housing 2 and the substrate 22. This configuration can reduce the contact area between the housing 2 and the substrate 22. This reduces the area in which capacitive coupling occurs between the housing 2 and the substrate 22, and can reduce the parasitic capacitance generated by the capacitive coupling. As a result, noise generation can be suppressed and the measurement accuracy of the moisture measuring device 1A can be improved.

[0111] The biosensor 11 is a capacitance sensor that detects capacitance, and the processing unit 21 converts the capacitance detected by the capacitance sensor into a frequency. With this configuration, the measurement accuracy of the moisture measuring device 1A can be improved.

[0112] In the first embodiment, the moisture measuring device 1A is described as having, as functional components, the biosensor 11, the processing unit 21, the operation display unit 31, and the calculation unit 32, but is not limited to this. For example, the processing unit 21 and the operation display unit 31 may be integrally formed. The biosensor 11 and the processing unit 21 may be integrally formed.

[0113] In the first embodiment, an example has been described in which the operation display unit 31 and the calculation unit 32 are provided in the moisture measuring device 1A, but this is not limiting. The operation display unit 31 and / or the calculation unit 32 do not have to be provided in the moisture measuring device 1A. The operation display unit 31 and / or the calculation unit 32 may be provided in a device other than the moisture measuring device 1A. For example, a smartphone or the like may be used as the operation display unit 31 and / or the calculation unit 32. In this case, the moisture measuring device 1A may be provided with a communication unit capable of wireless communication.

[0114] In the first embodiment, an example has been described in which the housing 2 includes the sensor unit 10, the probe unit 20, and the grip unit 30, but the present invention is not limited to this. The housing 2 may have any length as long as it has a longitudinal direction.

[0115] In the first embodiment, the biosensor 11 is an electrostatic capacitance sensor, but the present invention is not limited to this. The biosensor 11 may be any sensor that can obtain bioinformation.

[0116] In the first embodiment, the sensor surface 12 of the biosensor 11 is formed in a rectangular shape when viewed from the height direction (Z direction) of the moisture measuring device 1A. However, the present invention is not limited to this. For example, 11 The sensor surface 12 may have a polygonal, circular or elliptical shape when viewed in the height direction (Z direction) of the moisture measuring device 1A.

[0117] In the first embodiment, the processing unit 21 has a conversion circuit that converts the capacitance into a frequency, but is not limited to this. The processing unit 21 may have a circuit that converts the bioinformation acquired by the biosensor 11 into information other than a frequency.

[0118] In the first embodiment, the processing unit 21 is disposed near the center of the substrate 22 in the longitudinal direction (Y direction), but the present invention is not limited to this. For example, the processing unit 21 may be disposed at a position closer to the biosensor 11. In this manner, by shortening the distance between the processing unit 21 and the biosensor 11, it is possible to suppress noise from entering the processing unit 21.

[0119] In the first embodiment, an example in which the operation display unit 31 includes an operation unit and a display unit has been described, but the present invention is not limited to this. The operation display unit 31 may include at least one of an operation unit and a display unit.

[0120] In the first embodiment, an example has been described in which the housing 2 has two attachment parts 40, but the present invention is not limited to this. The housing 2 may have one or more attachment parts 40.

[0121] In the first embodiment, an example in which the attachment portion 40 is an engagement claw has been described, but the present invention is not limited to this. The attachment portion 40 may be any member that is disposed on the first main surface PS1 side of the substrate 22 and is capable of attaching the substrate 22 to the housing 2.

[0122] In the first embodiment, the mounting portion 40 is disposed at both ends of the substrate 22 in the short-side direction (X direction), but the present invention is not limited to this. The mounting portion 40 may be disposed at the end of the substrate 22 in the long-side direction (Y direction).

[0123] In the first embodiment, an example has been described in which the gap SP1 is formed between the protruding portion 42 of the attachment portion 40 and the first main surface PS1 of the substrate 22, but the present invention is not limited to this. For example, the gap SP1 may not be formed, and the protruding portion 42 and the first main surface PS1 of the substrate 22 may be in contact with each other.

[0124] In the first embodiment, an example has been described in which the housing 2 has two positioning pins 41, but the present invention is not limited to this. For example, the housing 2 may have one or more positioning pins 41. Alternatively, the housing 2 may not have the positioning pin 41.

[0125] In the first embodiment, an example has been described in which the housing 2 has a plurality of support parts 43, but this is not limiting. The housing 2 may have one or a plurality of support parts 43. For example, one frame-shaped support part 43 may be disposed along the outer periphery of the second main surface PS2 of the substrate 22.

[0126] In the first embodiment, the mounting portion 40, the positioning pin 41, and the support portion 43 are made of a resin material, but the present invention is not limited to this. For example, the mounting portion 40, the positioning pin 41, and the support portion 43 may be made of a metal material.

[0127] In the first embodiment, the moisture measuring device 1A is an oral moisture measuring device (oral moisture meter) that measures the amount of moisture in the oral cavity, but is not limited thereto. For example, the moisture measuring device 1A may be a skin moisture measuring device that measures the amount of moisture in the skin.

[0128] [Variation 1] Fig. 11 is a schematic diagram showing the configuration of a moisture measuring device 1B of Modification 1. As shown in Fig. 11, in the moisture measuring device 1B, the housing 2 may have four mounting portions 40A, 40B, 40C, and 40D. In Modification 1, the mounting portions 40A, 40B, 40C, and 40D are referred to as the first mounting portion 40A, the second mounting portion 40B, the third mounting portion 40C, and the fourth mounting portion 40D, respectively. The other configurations in Modification 1 are the same as those of the moisture measuring device 1A of the first embodiment.

[0129] When viewed from a direction (Z direction) perpendicular to the first main surface PS1 of the substrate 22, the first mounting portion 40A and the second mounting portion 40B are disposed between the biosensor 11 and the processing unit 21, and the third mounting portion 40C and the fourth mounting portion 40D are disposed at a position farther from the biosensor 11 than the processing unit 21. In addition, the first mounting portion 40A and the second mounting portion 40B are disposed opposite each other in the short-side direction (X direction) of the substrate 22, and the third mounting portion 40C and the fourth mounting portion 40D are disposed opposite each other in the short-side direction (X direction) of the substrate 22.

[0130] With this configuration, in the moisture measuring device 1B, the substrate 22 can be attached to the housing 2 more firmly.

[0131] The size of the first mounting portion 40A and the second mounting portion 40B is smaller than the size of the third mounting portion 40C and the fourth mounting portion 40D. Specifically, when viewed from a direction (Z direction) perpendicular to the first main surface PS1 of the substrate 22, the width W1 of the first mounting portion 40A and the second mounting portion 40B is smaller than the width W2 of the third mounting portion 40C and the fourth mounting portion 40D. Note that the widths W1 and W2 are dimensions in the longitudinal direction (Y direction) of the substrate 22.

[0132] With this configuration, the capacitance generated between the biosensor 11 and the processing unit 21 can be reduced, so that the generation of noise can be further suppressed.

[0133] In the first modification, an example in which the housing 2 has four mounting parts 40A to 40D has been described, but the present invention is not limited to this. For example, the housing 2 may have three mounting parts. In this case, the housing 2 may not have the first mounting part 40A, but may have the second to fourth mounting parts 40B to 40D. Alternatively, the housing 2 may not have the first mounting part 40A and the fourth mounting part 40D, but may have the second mounting part 40B and the third mounting part 40C.

[0134] [Variation 2] Fig. 12 is a schematic diagram showing the configuration of a moisture measuring device 1C of Modification 2. Fig. 13 is a schematic cross-sectional view taken along line BB in Fig. 12. As shown in Figs. 12 and 13, the attachment portion 50 may be a screw. The other configurations of Modification 2 are the same as those of the moisture measuring device 1A of the first embodiment.

[0135] The mounting part 50 has a screw head 51 and a screw body 52 connected to the screw head 51. The screw head 51 has a disk shape. The screw body 52 has a cylindrical shape with a diameter smaller than that of the screw head 51, and has a male thread portion on its outer wall. The mounting part 50 is formed of, for example, a resin material.

[0136] When viewed from a direction (Z direction) perpendicular to the first main surface PS1 of the substrate 22, the attachment portion 50 is disposed at a position farther from the biosensor 11 than the processing portion 21 is in the longitudinal direction (Y direction) of the substrate 22. In addition, the attachment portion 50 is disposed in the center of the substrate 22 in the lateral direction (X direction).

[0137] A through hole 25 is provided in the substrate 22 at a position where the mounting portion 50 is attached. The through hole 25 is larger than the outer diameter of the screw body 52 and smaller than the outer diameter of the screw head 51.

[0138] A support portion 43 is provided at a position where the mounting portion 50 is disposed when viewed from a direction (Z direction) perpendicular to the first main surface PS1 of the substrate 22. The support portion 43 is provided with a screw hole 44 into which a screw body 52 is screwed. The screw body 52 of the mounting portion 50 passes through a through hole 25 of the substrate 22 and screws into the screw hole 44. In this way, the mounting portion 50 restricts the substrate 22 from moving in the thickness direction of the substrate 22 (Z direction).

[0139] Furthermore, a gap SP3 is formed between the screw head 51 of the mounting portion 50 and the first main surface PS1 of the substrate 22. The size of the gap SP3 is approximately the same as the size of the gap SP1. By providing the gap SP3 between the screw head 51 and the first main surface PS1 of the substrate 22, damage to the substrate 22 can be suppressed, for example, even if the moisture measuring device 1C receives an impact due to being dropped, etc. Furthermore, capacitive coupling between the screw head 51 and the substrate 22 can be suppressed, and noise generation can be suppressed.

[0140] In the moisture measuring device 1C, the overlap region R2 means a region where the screw head 51 and the substrate 22 overlap on the first main surface PS1 of the substrate 22 when viewed from a direction (Z direction) perpendicular to the first main surface PS1 of the substrate 22. In other words, it means a region of the screw head 51 projected onto the first main surface PS1 of the substrate 22 when viewed from a direction (Z direction) perpendicular to the first main surface PS1 of the substrate 22.

[0141] In the moisture measuring device 1C as well, the occurrence of noise can be suppressed by configuring the total area of ​​the overlap region R2 to be smaller than the sensor area of ​​the sensor surface 12 of the biosensor 11. This improves the measurement accuracy of the moisture measuring device 1C. Furthermore, by configuring the mounting portion 50 with a screw, the substrate 22 can be attached to the housing 2 more firmly.

[0142] In the second modification, an example in which the housing 2 has one mounting portion 50 has been described, but the present invention is not limited to this. The housing 2 may have one or more mounting portions 50. For example, instead of the positioning pin 41, two mounting portions 50 may be attached to the two cutouts 23 of the substrate 22.

[0143] In the second modification, the mounting portion 50 is made of a resin material, but the present invention is not limited to this. For example, the mounting portion 50 may be made of a metal material.

[0144] In the second modification, an example has been described in which the gap SP3 is formed between the screw head 51 and the first main surface PS1 of the substrate 22, but the present invention is not limited to this. For example, the gap SP3 may not be formed, and the screw head 51 and the first main surface PS1 of the substrate 22 may be in contact with each other.

[0145] [Variation 3] Fig. 14 is a schematic diagram showing the configuration of a moisture measuring device 1D of Modification 3. As shown in Fig. 14, in the moisture measuring device 1D, the processing unit 21 is disposed closer to the biosensor 11 side than in the moisture measuring device 1A of embodiment 1. Also, the multiple attachment units 40 are disposed facing each other at a position farther from the biosensor 11 than the processing unit 21. The other configurations in Modification 3 are the same as those of the moisture measuring device 1A of embodiment 1.

[0146] In the moisture measuring device 1D, the processing unit 21 is disposed closer to the biosensor 11 than the center in the longitudinal direction (Y direction) of the substrate 22 when viewed from a direction (Z direction) perpendicular to the first main surface PS1 of the substrate 22. With this configuration, the distance L1 between the biosensor 11 and the processing unit 21 is shortened, making it difficult for noise to enter the processing unit 21.

[0147] The multiple mounting parts 40 are disposed on the opposite side of the biosensor 11 from the center in the longitudinal direction (Y direction) of the substrate 22 when viewed from the direction (Z direction) perpendicular to the first main surface PS1 of the substrate 22. With this configuration, the distance L2 between the processing unit 21 and the multiple mounting parts 40 is increased, making it difficult for noise caused by capacitive coupling at the multiple mounting parts 40 to enter the processing unit 21.

[0148] Also, when viewed from a direction (Z direction) perpendicular to the first main surface PS1 of the substrate 22, the distance L2 between the multiple attachment parts 40 and the processing part 21 is greater than the distance L1 between the biosensor 11 and the processing part 21. In FIG. 14, the distance L1 is the shortest distance connecting the end (right end) of the biosensor 11 closer to the processing part 21 and the end (left end) of the processing part 21 closer to the biosensor 11. The distance L2 is the shortest distance connecting the end (right end) of the processing part 21 closer to the attachment part 40 and the end (left end) of the attachment part 40 closer to the processing part 21. With this configuration, noise is further prevented from entering the processing part 21. This can further improve the measurement accuracy of the moisture measuring device 1D.

[0149] <Example> Examples will now be described.

[0150] As described above, the gap SP1 makes it possible to make the substrate 22 less likely to be damaged by an impact such as a drop, and to make it less likely to cause capacitive coupling. Therefore, an experiment was carried out in which a drop test was carried out by changing the relationship between the thickness of the substrate 22 and the gap SP1, and whether or not the substrate 22 was damaged was evaluated.

[0151] <Experiment 1> In experiment 1, the board 22 was attached to one of the faces of a cube-shaped housing having six faces with screws, and a drop test was performed in which the housing with the board 22 attached was dropped from a height of 1 m onto a concrete floor. In the drop test, the housing was dropped once on each face.

[0152] In experiment 1, a drop test was performed on substrate 22 having a thickness of 1 mm with the size of gap SP1 being changed to 0 mm, 0.1 mm, 0.3 mm, and 0.5 mm, and it was evaluated whether substrate 22 was damaged or not.

[0153] In addition, in experiment 1, the measurement error was calculated when measuring moisture using the moisture measuring device 1A of embodiment 1 with the size of the gap SP1 changed to 0 mm, 0.1 mm, 0.3 mm, and 0.5 mm for a substrate 22 with a thickness of 1 mm.

[0154] <Experiment 2> In experiment 2, a drop test was performed in the same manner as in experiment 1, with the size of gap SP1 being changed to 0 mm, 0.12 mm, 0.3 mm, and 0.6 mm for substrate 22 having a thickness of 1.2 mm, to evaluate whether substrate 22 was damaged.

[0155] In addition, in experiment 2, in a manner similar to that of experiment 1, the measurement error was calculated when measuring moisture using the moisture measuring device 1A of embodiment 1, with the size of the gap SP1 being changed to 0 mm, 0.12 mm, 0.3 mm, and 0.6 mm for a substrate 22 with a thickness of 1.2 mm.

[0156] The results of Experiments 1 and 2 are shown in Tables 1 and 2.

[0157] [Table 1]

[0158] [Table 2]

[0159] As shown in Table 1, in experiment 1, when the size of gap SP1 was 0 mm, damage to substrate 22 was confirmed in the drop test. On the other hand, when the size of gap SP1 was 0.1 mm or more and 0.5 mm or less, damage to substrate 22 was not visually confirmed in the drop test.

[0160] As shown in Table 2, in experiment 2, when the size of gap SP1 was 0 mm, damage to substrate 22 was confirmed in the drop test. On the other hand, when the size of gap SP1 was 0.12 mm or more and 0.6 mm or less, damage to substrate 22 was not visually confirmed in the drop test.

[0161] As described above, the results of Experiments 1 and 2 show that when the size of gap SP1 is between 0.1 and 0.5 times the thickness of substrate 22, damage to substrate 22 can be suppressed even if it is subjected to an impact such as being dropped.

[0162] It is preferable that the thickness of the substrate 22 is somewhat thick in order to prevent bending due to an impact such as a drop. If the substrate 22 bends, solder cracks may occur in electronic components mounted on the substrate 22 by soldering. Therefore, in consideration of preventing solder cracks, a thicker substrate 22 can improve quality.

[0163] Furthermore, as shown in Tables 1 and 2, the larger the size of gap SP1, the more the dielectric is separated from the pattern of substrate 22, thereby suppressing the occurrence of parasitic capacitance. As a result, the larger the gap SP1, the smaller the measurement error of the moisture measuring device 1A.

[0164] Although the present invention has been fully described in connection with the preferred embodiment with reference to the accompanying drawings, various changes and modifications will become apparent to those skilled in the art, and such changes and modifications are to be understood as being included within the scope of the present invention as defined by the appended claims, unless they depart therefrom. [Industrial Applicability]

[0165] The moisture measuring device of the present invention can be applied to devices for measuring moisture, such as an oral moisture meter and a skin moisture meter. [Explanation of symbols]

[0166] 1A, 1B, 1C, 1D Moisture measuring device 2. Chassis 3. First cabinet 4. Second housing 10 Sensor section 12 Sensor surface 20 Probe section 21 Processing section 22 Substrate 23 Notch 24 Conductor 25 Through hole 30 Gripping part 31 Operation display section 32 Calculation section 40 Mounting portion (engagement claw) 41 Locating pin 42 Protrusion 43 Support part 44 screw holes 50 Mounting part (screw) 51 Screw head 52 Screw body D1 Longitudinal direction E1 one end E2 other end L1,L2 distance P1 Interval PS1 First main surface PS2 2nd main surface R1,R2 overlap area SP1 Gap SP2 Space SP3 Gap

Claims

1. a biosensor having a sensor surface for acquiring biometric information; A processing unit that processes the bioinformation acquired by the biosensor; A substrate having a first main surface on which the processing unit is mounted; a housing that houses the biosensor, the processing unit, and the substrate; one or more mounting portions arranged on the first main surface side of the substrate and configured to mount the substrate to the housing; Equipped with a total area of ​​one or more overlapping regions in which the one or more mounting portions and the substrate overlap on the first main surface of the substrate when viewed from a direction perpendicular to the first main surface of the substrate is smaller than a sensor area of ​​the sensor surface of the biosensor; Moisture measuring device.

2. A conductor portion including a wiring pattern is formed on the first main surface of the substrate, a total area of ​​the one or more overlapping regions is smaller than a total area of ​​the conductor portion; The moisture measuring device according to claim 1 .

3. The one or more mounting portions are formed of resin. The moisture measuring device according to claim 1 .

4. the one or more attachment portions include one or more screws having a screw head; The moisture measuring device according to claim 1 .

5. The one or more attachment portions include one or more engagement claws, the one or more engagement claws are provided inside the housing and have a protruding portion protruding from an outer side toward an inner side of the substrate on the first main surface side of the substrate; The moisture measuring device according to claim 1 .

6. The one or more engagement claws are spaced apart from the first main surface of the substrate. The moisture measuring device according to claim 5.

7. A distance between the one or more engagement claws and the first main surface of the substrate is 0.1 to 0.5 times the thickness of the substrate. The moisture measuring device according to claim 6.

8. The substrate has a longitudinal direction and a lateral direction, The plurality of engagement claws are arranged on both ends of the substrate in the short side direction. The moisture measuring device according to claim 5.

9. The plurality of engagement claws are arranged at intervals in the longitudinal direction of the substrate. The moisture measuring device according to claim 8.

10. The plurality of engaging claws include a first engagement claw disposed between the biosensor and the processing unit in the longitudinal direction of the substrate; a second engagement claw disposed on the opposite side to the side on which the first engagement claw is disposed in the short-side direction of the substrate and closer to the processing section than the first engagement claw in the long-side direction of the substrate; have The moisture measuring device according to claim 9.

11. the substrate has a second main surface opposite the first main surface, the housing has a support portion that partially supports the second main surface, A space is formed between the housing and the substrate. The moisture measuring device according to claim 1 .

12. The one or more attachment parts are disposed at a position farther from the biosensor than the processing part. The moisture measuring device according to claim 1 .

13. a distance between the one or more mounting portions and the processing portion is greater than a distance between the biosensor and the processing portion; The moisture measuring device according to claim 12.

14. the biosensor is a capacitance sensor that detects capacitance, The processing unit converts the capacitance detected by the capacitance sensor into a frequency. The moisture measuring device according to claim 1 .

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