JP5500546B2 - Biometric device - Google Patents

Description

  The present invention relates to a biometric device that measures biometric information, and more particularly, to a biometric device that can display the position of a subject's foot so that the biometric information of the subject can be accurately and measured.

  Conventionally, various biometric devices for measuring biometric information such as the body weight, body fat percentage, and muscle mass of a subject have been used. For example, a weight scale with a body fat scale, which is one of biometric measuring apparatuses, is widely used for business purposes. In such a weight scale with a body fat scale, an electrode member for measuring the bioelectrical impedance (electrical resistance) of the measurement subject is fixedly arranged on the upper surface of the base portion of the weight scale with a body fat scale. . In addition, there are some marks on the upper surface of the platform portion of the body scale with a body fat scale that are shaped like a foot so that the person to be measured can easily recognize the correct placement position.

  When the person to be measured turns on the weight scale with body fat scale and puts his feet on the foot of the base of the weight scale with body fat scale, biological information such as weight and body fat percentage is measured (patent) Reference 1).

Japanese Patent Laid-Open No. 7-12635

Such a footprint as a mark attached to a biological measuring device such as a weight scale with a conventional body fat scale is one pattern assuming a foot size of a measurement subject who is an adult having a standard physique. Is only displayed.
However, the biometric device may be used by subjects to be measured who have significantly different foot sizes due to differences in physique, such as children, adults, the elderly, men, and women. For this reason, for example, for a person to be measured having a small foot size, even if the mark of the foot shape is too large, and the foot is placed in the foot shape, the position of the foot of the person to be measured with respect to the biometric device is the biological information. There is a possibility that the position is not suitable for accurate measurement. In such a case, accurate biological information of the person to be measured cannot be acquired by the biological measurement device.

  Therefore, the present invention provides a biometric device that accurately guides the measurement subject to the position of the measurement subject's foot relative to the biometric measurement device, and enables more accurate acquisition and measurement of the measurement subject's biological information. The purpose is to do.

The biometric apparatus of the present invention for solving the above-described problems is an acquisition means for acquiring the physical characteristics of a person to be measured, an energizing electrode for supplying current to the body of the to-be-measured person, and supplied from the energizing electrode. A measurement electrode that obtains a voltage generated in a current path of a current flowing through the body of the measurement subject, and a bioimpedance of the measurement subject is calculated from a current supplied from the conduction electrode and a voltage measured by the measurement electrode. An impedance measuring unit, a control unit that determines a footrest position of the measurement subject's foot placed on the energized electrode and the measurement electrode based on the physical characteristics, and the control unit that is determined by the control unit It includes a position displaying means for performing display for indicating the foot rest position, a display for indicating the footrest positions, displayed within and / or outside of the area of the energizing electrode and / or the measuring electrode Characterized in that it is.

  In the biometric device of the present invention, the physical feature is the height of the person to be measured.

  Further, in the biometric apparatus of the present invention, the control means determines the measurement subject's foot size based on the physical characteristics of the measurement subject acquired by the acquisition means, and based on the foot size The footrest position is determined.

  Further, in the biometric device of the present invention, the control means obtains a predetermined distance calculated by halving a value obtained by subtracting the distance between the energized electrode and the measurement electrode from the foot size, The position at which the predetermined distance is taken in the direction opposite to the energizing electrode from the edge of the measurement electrode is determined as the footrest position.

  In the biometric device of the present invention, the footrest position is a position where the measurement subject's heel is aligned.

  In the biometric apparatus of the present invention, the control means may calculate a predetermined distance calculated by dividing a value obtained by subtracting a separation distance between the conduction electrode and the measurement electrode from the determined foot size by half. The position where the predetermined distance is taken in the direction opposite to the measurement electrode from the edge of the energizing electrode is determined as the footrest position.

  In the biometric apparatus of the present invention, the footrest position is a position where the toe of the person to be measured is aligned.

  According to the biometric device of the present invention, since the footrest position can be displayed based on the physical characteristics of each person to be measured, the biological information of the person to be measured can be further obtained regardless of the physique difference between the persons to be measured. It can be measured accurately and reliably.

It is a top view of the weight scale with a body fat scale which concerns on 1st Embodiment of this invention. It is a disassembled perspective view of the measurement unit of the weight scale with a body fat scale based on 1st Embodiment of this invention. It is a block diagram of a weight scale with a body fat scale according to the first embodiment of the present invention. It is a flowchart of the process which displays a to-be-measured person's footrest position. (A) is a graph showing the relationship between the height and foot size of a standard Japanese man, and (b) is a graph showing the relationship between the height and foot size of a standard Japanese woman. It is a top view of the measurement unit of the weight scale with a body fat scale which concerns on 2nd Embodiment. (A) is a perspective view of the weight scale with a body fat scale which concerns on 3rd Embodiment, (b) is a figure which shows the structure of the grip of the weight scale with a body fat scale which concerns on 3rd Embodiment. It is a top view of the measurement part of the weight scale with a body fat scale which concerns on 3rd Embodiment.

[First Embodiment]
Hereinafter, a first embodiment in which a biometric apparatus according to the present invention is applied to a weight scale with a body fat scale will be described with reference to the drawings. FIG. 1 is a plan view of a weight scale 1 with a body fat scale according to the first embodiment, FIG. 2 is an exploded perspective view of a measurement unit 20 of the weight scale 1 with a body fat scale according to the first embodiment, and FIG. FIG. 4 is a block diagram of a weight scale with a body fat scale 1 according to the first embodiment, FIG. 4 is a flowchart of a process for displaying a footrest position of a person to be measured, and FIG. A graph showing the relationship between height and foot size, FIG. 5B is a graph showing the relationship between height and foot size of a standard Japanese woman. 5A and 5B, the vertical axis indicates foot size (cm), and the horizontal axis indicates height (cm).

  As shown in FIG. 1, a weight scale with a body fat scale 1 (hereinafter referred to as a weight scale 1) according to the first embodiment includes a display unit 3 and a measurement unit 20, and the display unit 3 and the measurement unit 20. Are electrically connected by a cable 45.

  The display unit 3 includes a display / operation unit 21 (acquisition unit), a control unit 29 (control unit), and a storage unit 25. The measurement unit 20 includes a cover member 20a, a bottom plate member 20b, a frame member 40, energization electrodes 31L and 31R, measurement electrodes 32L and 32R, an impedance measurement unit 48, a light emitting element 11 (position display means), a load cell 60, and leg portions. 65 and a power supply 26.

  As an example, the display / operation unit 21 may be provided as a liquid crystal display incorporating a touch panel. In this case, a display function capable of displaying biometric information, an input screen, an input result, and the like, and a measurement subject touch the display / operation unit 21. It has an input function that can input personal information (physical features) such as gender, age, and height, and setting items. The display / operation unit 21 may have a display mechanism such as liquid crystal and a button-type or dial-type mechanical input mechanism separately. In the present embodiment, the display / operation unit 21 serves as an acquisition unit for acquiring the physical characteristics of the measurement subject by inputting the physical characteristics of the measurement subject himself / herself using the display / operation unit 21. The configuration will be described. However, as described above, the acquisition unit is not limited to the configuration in which physical information is input by the measurement subject. For example, a configuration may be adopted in which a height meter capable of measuring the height of the measurement subject is provided as the acquisition means. In this case, the physical feature of height can be acquired without input by the measurement subject.

  The storage unit 25 is configured by, for example, a RAM (Random Access Memory), and can store personal information input from the display / operation unit 21 and can store setting items. Here, the setting items are items necessary for the measurement subject (user) to use the scale 1. For example, a program for calculating based on equations (1) to (3) to be described later, data indicating the relationship between height and foot size (see FIG. 5), the size of characters and symbols of displayed biological information, The type of biometric information.

  As shown in FIG. 2, the measurement unit 20 is formed in a substantially box shape by a cover member 20a and a bottom plate member 20b fixed to the cover member 20a, and is made of metal between the cover member 20a and the bottom plate member 20b. The frame member 40 is arranged. The cover member 20a and the bottom plate member 20b may be molded from resin (for example, ABS resin (acrylonitrile / butadiene / styrene copolymer)), glass, or the like as an example. In order to increase the strength of the measurement unit 20, the bottom plate member 20b may be made of metal.

  On the upper surface of the cover member 20 a of the measurement unit 20, a flat placement portion 7 on which the measurement subject is placed (standing) is configured. The mounting portion 7 is in contact with the back surface of the measurement subject's foot, and energized electrodes 31L and 31R and measurement electrodes 32L and 32R formed from a metal plate are disposed apart from each other. The cover member 20a is formed with a recess (not shown) into which the electrode member 30 can be fitted, and the conducting electrodes 31L and 31R, the measurement electrodes 32L and 32R, and the mounting portion 7 are flush with each other. It is configured as follows.

The energization electrodes 31L and 31R are electrodes for supplying a current for measuring bioimpedance from the part of the body of the subject to be contacted (for example, the sole near the toe) to the body of the subject. The measurement electrodes 32L and 32R acquire and measure the voltage generated in the current path of the current flowing through the body of the subject at the part of the body of the subject to be contacted (for example, the sole near the heel). Electrode. The impedance measuring unit 48 can calculate and measure the biological impedance of the person to be measured based on each value of such current and voltage. More specifically, the bioelectrical impedance measuring unit 48 is connected to the conducting electrodes 31L and 31R and connected to the measuring electrodes 32L and 32R, and a constant current supplying unit (not shown) for applying a weak high-frequency constant current. And a voltage measuring unit (not shown in the figure) for measuring the potential difference of the living body. In the present embodiment, the energization electrode 31L and the measurement electrode 32L are in contact with one leg of the person to be measured, and the energization electrode plate 31R and the measurement electrode 32R are in contact with the other leg of the person to be measured. .

Furthermore, the measurement electrodes 32L and 32R are provided with a plurality of through-holes 13 penetrating in the thickness direction within the area. The light emitting element 11 as a position display means is arranged in the measurement unit 20 so that the person to be measured can visually recognize through each through-hole 13. The through-holes 13 are arranged in the cover member 20a at equal intervals in the left-right (width) direction and the vertical (vertical) direction in FIG. In the present embodiment, four each are arranged in the left-right direction and the up-down direction, but the number of light-emitting elements 11 can be changed as appropriate. In addition, the light emitting element 11 painted black in FIG. 1 shows a state in which the light is turned on, and other light emitting elements 11 show a state in which the light is turned off.
Each light emitting element 11 can be turned on and off based on the footrest position determined by the control unit 29. When a person to be measured having a predetermined height puts his heel on the mounting portion 7 with the light emitting element 11 painted black, the legs of the person to be measured are surely connected to the energizing electrodes 31L and 31R and the measurement electrodes 32L, It will be in contact with 32R.

  Load cells 60 (60a, 60b, 60c, 60d) as weight measuring means are arranged and fixed in the recesses 41 at the four corners of the frame member 40 in the measurement unit 20. The load cell 60 is attached to a strain generating body 61 made of a metal member that is deformed according to a load, and a strain generating portion that is a strainable portion of the strain generating body 61, and has a resistance value according to deformation (expansion / contraction) of the strain generating section. A strain gauge 63 that changes. A fixed end portion of the strain body 61 is fixed to the frame member 40 by a screw 67 and a nut 69, and a movable end portion of the strain body 61 is fixed to the leg portion 65 by a screw 67 and a nut 69. The leg portion 65 is configured to protrude to the outside of the measurement unit 20 through the through holes 20b1 to 20b4 of the bottom plate member 20b and to be grounded.

  When the person to be measured is placed on the placement portion 7 of the cover member 20a of the measurement unit 20, the load of the person to be measured is transmitted to the strain body 61 of the load cell 60 through the cover member 20a and the frame member 40, and the strain section is deformed. In response to the deformation, the strain gauge 63 expands and contracts. The weight of the person to be measured is measured using the change in the resistance value due to the expansion and contraction of the strain gauge 63. That is, the control unit 29 determines the weight of the person to be measured from the difference between the resistance value from the load cell 60 when no load is applied to the measurement unit 20 (so-called zero point) and the resistance value when the load is applied. calculate.

  The scale 1 is operated by a battery 26 or a power source 26 that supplies power from the outside.

  As shown in FIG. 3, the control unit 29 is electrically connected to the display / operation unit 21, the light emitting element 11, the storage unit 25, the power source 26, the impedance measurement unit 48, and the load cell 60, and controls each component. .

  The scale 1 according to the present embodiment is configured such that the pair of energizing electrode 31L and measurement electrode 32L is in contact with the back of the left foot, and the pair of energizing electrode 31R and measurement electrode 32R is in contact with the back of the right foot. The impedance measuring unit 48 contacts the subject's left foot toe, the leg (lower body), the right foot toe, and the right foot from the constant current supply unit (not shown) via the conductive electrode 31L contacting the left foot. A weak constant current is applied through a current path of the energizing electrode 31R, and the voltage at the measurement electrodes 31b and 32b (near both footpads) of this current path is measured by a voltage measuring unit (not shown), and the bioimpedance is measured. Measure and calculate.

[Display processing to indicate footrest position]
A description will be given of processing performed by the control unit 29 in order to display the footrest position of the person to be measured on the scale 1. First, as shown in FIG. 4, height and sex, which are physical characteristics of the person using the weight scale 1, are input using the display / operation unit 21 (step S <b> 101). Next, the gender of the person to be measured is identified (step S102). If it is a male (Yes in step S102), the process proceeds to step S103, and the foot size of the person to be measured is calculated and acquired using the following formula (1) based on the input height. On the other hand, if it is a woman (No in step S102), the process proceeds to step S104, and based on the input height, the measurement subject's foot size is calculated and obtained using the following equation (2).

Foot size, that is, the projected distance from the heel point to the apex point (the straight line connecting the heel point and the tip of the second finger) is the foot size and height (vertical distance from the floor to the highest point of the head) It is calculated from the relational expression. For example, when the measurement subject is a Japanese adult male, the relationship between the foot size and the height can be represented by the approximate line of the following equation (1) from the statistical data shown in FIG. .
Y1 = 0.138 · X1 + 1.6052 Formula (1)
Here, Y1 indicates the foot size and X1 indicates the height.

Further, when the measurement subject is a Japanese adult female, the relationship between the foot size and the height can be expressed by the approximate line of the following equation (2) from the statistical data shown in FIG. .
Y2 = 0.0828 · X2 + 9.9805 (2)
Here, Y2 indicates the foot size and X2 indicates the height.

  The above formulas (1) and (2) are stored in the storage unit 25. As described above, the control unit 29 identifies gender based on the gender information input by the person to be measured, and when the person to be measured is male, the foot size (Y1) is calculated according to the equation (1). Is obtained as an estimated value (step S103), and when the person to be measured is a woman, the foot size (Y2) is obtained as an estimated value according to equation (2) (step S104).

  Next, based on the acquired foot size, a position (Z1) where the heel should be aligned on the measurement electrodes (32L, 32R) is calculated (step S105). As shown in FIG. 1, let S be the distance between the edges 34 and 36 facing each other between the energizing electrodes 31L and 31R and the measurement electrodes 32L and 32R. At this time, each of the feet of the person to be measured is an edge of the measurement electrodes 32L and 32R as a position for fitting the heels, which is desirable in order to surely contact each of the conduction electrode 31L, the measurement electrode 32L, the conduction electrode 31R, and the measurement electrode 32R. The distance Z1 from the part 36 is calculated by the following equation (3).

Z1 = (Y−S) / 2 Formula (3)
Here, Y is the foot size Y1 or Y2 obtained from the equation (1) or (2), and S is the edge 34 of the conducting electrodes 31L and 31R and the edge 36 of the measuring electrodes 32L and 32R. The length between them (that is, the distance between the energizing electrode and the measurement electrode), Z1, is the distance from the edge 36 of the measurement electrodes 32L and 32R. That is, Z1 means that the sole of the left foot is in contact with the conducting electrode 31L and the measurement electrode 32L, and that the sole of the right foot is in contact with the conducting electrode 31R and the measurement electrode 32R. It is calculated as a purpose.

After obtaining the distance Z1 by the expression (3), the control unit 29 turns on the light emitting elements 11 arranged at the position closest to the distance Z1, for example, in a line (step S106). Thus, the light-emitting element 11 that is turned on displays a footrest position for aligning the measurement subject's heel.
As an example, it is assumed that the separation distance S between the energization electrode and the measurement electrode of the scale 1 is 8 cm, and the measurement subject using this is a Japanese male who is 175 cm tall. From the formula (1), Y2 is 25.76 cm, and from the formula (3), Z1 is 8.88 cm. Therefore, the light emitting element 11 arranged at the position of 8.88 cm from the edge of the measurement electrodes 32L and 32R or closest to the position is turned on.

  Thereafter, when the person to be measured puts his / her foot on the light-emitting element 11 (foot placement position) and is placed on the placement unit 7, the control unit 29 determines the person to be measured based on the change in the resistance value of the load cell 60. The body weight is calculated and acquired, and the biometric impedance is calculated and acquired by the impedance measuring unit 48, and the control unit 29 calculates and acquires the body fat percentage and the body fat mass. The acquired weight, body fat percentage, and the like are displayed on the display / operation unit 21.

  Thus, by calculating the foot size for each person to be measured as an estimated value and displaying the footrest position of the person to be measured based on this foot size, the position on which the foot of the person to be measured is placed is the weight scale 1. Can be guided so as to be in an appropriate positional relationship. As a result, the biological information of the measurement subject can be accurately measured.

[Second Embodiment]
A weight scale with a body fat scale according to the second embodiment will be described with reference to FIG. FIG. 6 is a plan view of the measurement unit 120 of the weight scale with a body fat scale according to the second embodiment. In addition, since the display unit of the weight scale with a body fat scale according to the second embodiment has the same configuration and function as the first embodiment, illustration and description thereof are omitted.

  The measurement unit 120 of the second embodiment is different from the measurement unit 20 of the first embodiment in that the light emitting element 111 as the position display means is arranged along the reference line L in the vertical direction in FIG. The footrest position to be adjusted is configured to be displayed by irradiating light. Therefore, the measurement electrodes 132L and 132R are not formed with through holes for arranging the light emitting element 11 of the first embodiment.

  The measurement unit 120 includes a raised portion 110, and the raised portion 110 is provided on the mounting portion 107 between the measurement electrodes 132L and 132R. In addition, a plurality of (three in FIG. 6) light are provided along the reference line L that is a center line that is equidistant from both ends of the measurement unit 120 in the width direction (lateral direction in FIG. 6). Irradiation means (position display means) 111 are arranged at equal intervals. The light irradiation means 111 can irradiate light in a direction perpendicular to the reference line L and away from the reference line L. That is, the light B is irradiated as a footrest position for aligning the heels in a direction crossing both measurement electrodes 132L and 132R. In addition, you may comprise the single light irradiation means 111 so that a drive in the reference line L direction within the protruding part 110 is possible.

  As in the first embodiment, when the control unit 29 obtains the distance Z1 from the edge 136 of the measurement electrodes 132L and 132R, the light emitting element capable of irradiating the part located at the distance Z1 111 is made to emit light, and the footrest position for aligning the heel is displayed. This embodiment has an advantage that the configuration can be simplified because the number of light emitting elements can be relatively reduced as compared with the configuration according to the first embodiment.

[Third Embodiment]
A weight scale 201 with a body fat scale according to a third embodiment will be described with reference to FIG. Fig.7 (a) is a perspective view of the weight scale 201 with a body fat scale which concerns on 3rd Embodiment, FIG.7 (b) shows the structure of the grip of the weight scale 201 with a body fat scale which concerns on 3rd Embodiment. FIGS. 8A and 8B are plan views of a measuring unit of the body scale with a body fat scale according to the third embodiment.

  As shown in FIGS. 7 and 8, a weight scale 201 with a body fat scale according to the third embodiment (hereinafter referred to as a weight scale 201) includes a measurement unit 220, a support unit 251 extending in the vertical direction, and a support unit. 251 includes a display unit 203 provided on the upper portion of 251, a light irradiation unit 211, and a left-hand grip 270 </ b> L and a right-hand grip 270 </ b> R provided on both side surfaces of the support unit 251 through a cord 245 to be connected. The left hand grip 270L is provided with an energizing electrode 280L for flowing current from the left palm of the measurement subject to the body and a measurement electrode 281L for measuring a voltage (potential difference) generated in the body. In addition, the right hand grip 270R is provided with a conducting electrode 280R for flowing current from the right palm of the measurement subject to the body and a measurement electrode 281R for measuring a voltage (potential difference) generated in the body. The portion where the energizing electrode 280L and the measurement electrode 281L are disposed is the grip portion of the left hand grip 270L, and the portion where the energization electrode 280R and the measurement electrode 281R are disposed is the grip portion of the right hand grip 270R. The weight scale 201 is different from the first and second embodiments in that the measurement unit 220 and the display unit 203 are integrated. The measurement unit 220 is connected to the display unit 203 and the support unit 251 and can measure a voltage by supplying a predetermined current from both hands as well as both feet of the measurement subject. Since it is the same structure and function as the measurement units 20 and 120 of 2 embodiment, detailed description is omitted.

  A light irradiation unit 211, which is a position display unit for displaying the footrest position on the measurement unit 220, is provided at a predetermined portion of the support unit 251 that stands upright. The weight scale 201 is configured such that the person to be measured stands facing the display unit 201 side. Accordingly, the footrest position for matching the toes is displayed by the light B emitted from the light irradiation means 211.

  The process of determining the position to match the toes in the weight scale 201 will be described. Similar to the first and second embodiments, the foot size of the subject is acquired from the gender and height of the subject using Equation (1) or Equation (2) (Steps S103 or S104 in FIG. 4). reference).

  Next, the edges of the energizing electrodes 231L and 231R are used as positions to match the toes, which are desirable to ensure that each foot of the subject is in contact with the energizing electrode 231L, the measuring electrode 232L, the energizing electrode 231R, and the measuring electrode 232R. The distance Z2 from the part 234 is calculated by the following equation (4).

Z2 = (Y−S) / 2 Formula (4)
Here, Y is the foot size Y1 or Y2 obtained from the equation (1) or (2), and S is the edge 234 of the conducting electrodes 231L and 231R and the edge 236 of the measuring electrodes 232L and 232R. The length between them (that is, the separation distance between the current-carrying electrode and the measurement electrode), Z2 is the distance from the edge 234 of the current-carrying electrodes 231L and 231R. That is, Z2 is such that the sole of the left foot is in equal contact with the conducting electrode 231L and the measurement electrode 232L, and that the sole of the right foot is in contact with the conducting electrode 231R and the measurement electrode 232R. It is calculated as a purpose.

  When the distance Z2 is calculated by the equation (4) (see step S105 in FIG. 4), the irradiation direction of the light B from the light irradiation means 251 is adjusted by an optical system (not shown), and the distance Z2 from the edge 234 is adjusted. It is irradiated as a footrest position for aligning the toes at the position.

  In the first and second embodiments, the position of the heel is displayed. In the third embodiment, the position of the toe is displayed. However, the present invention is not limited to these structures. For example, the configuration of the third embodiment can be added to the configuration of the first and second embodiments that can display the position of the heel, and the toe position can also be displayed. Furthermore, the configuration of the first or second embodiment can be added to the third embodiment. Further, the position display means in the measurement electrode of the first embodiment may be similarly provided on the energizing electrode side. In this case, the measurement electrode 31L and 31R are also provided with the through hole and the light emitting element 11, and the third What is necessary is just to display the footrest position which matches a toe by applying the determination method of distance Z2 in embodiment. The same applies to the second embodiment.

  Furthermore, in the present embodiment, the foot size is calculated based on the height of the person to be measured. However, the foot size of the measurer may be directly input via the display / operation unit. Furthermore, it is also possible to use a known height measuring device as the acquisition means, and the biometric device can acquire the height information of the measurement subject from the height measuring device.

  In the above embodiment, the position display means for displaying the footrest position is configured to display the footrest position for aligning one or both of the toe and the heel of the foot, but the relationship between the height and the foot width. It is good also as a structure which can also display the position which the both ends of a leg width should use. As the light-emitting element, a light-emitting diode, organic electroluminescence, a plasma light-emitting element, or the like can be used, and a halogen lamp can be used instead of the light-emitting element.

  In the first embodiment, the position display means uses a plurality of light-emitting elements that can be turned on and off. However, the color panel is driven so that the color change can be visually recognized through the through-hole 13. You may comprise as follows.

  Alternatively, a portion for displaying the footrest position may be configured as a transparent member, and the position display unit may function (e.g., turn on the light emitting element, drive the color panel) on the inside thereof. If comprised in this way, it will become unnecessary to provide a through-hole like the measurement electrode in 1st Embodiment, for example, and the grounding feeling of a to-be-measured person's sole will also become favorable.

  Moreover, although the footrest position in said embodiment demonstrated what was displayed on a horizontal line, you may make it display with a curve according to the shape of a heel or a toe.

  Further, the footrest position in the above embodiment is displayed on two or more electrode members (measurement electrodes 32L and 32R in FIG. 1, measurement electrodes 132L and 132R in FIG. 6, and energization electrodes 231L and 231R in FIG. 7). However, the footrest position displayed in the present invention only needs to be displayed on at least one electrode member (a conducting electrode or a measurement electrode). If only one foot position is displayed on any one of the electrode members, the position where one foot should be placed becomes clear, and the position where the other foot should be placed is a corresponding position with reference to the position of the one foot. This is because it is enough.

  Furthermore, in the above embodiment, in order to make it easier for the measurement subject to intuitively understand the footrest position, the configuration for displaying the footrest position within the area of the electrode member has been described. There is no particular limitation as long as it can display a guideline for the person to be measured to place his / her feet on the electrode member. For example, in 1st Embodiment (refer FIG. 1), the through-hole 13 and the light emitting element 11 are provided in the cover member 20a between measurement electrode 32L, 32R (and / or between electricity supply electrode 31L, 32R). The display for indicating the footrest position may be displayed outside the area of the electrode member.

  Furthermore, in the embodiment, the relationship between the height and the foot size (statistical data) for each of the male and female is used, but the statistical data regarding the relationship between the height and the foot size obtained without dividing the gender. The data to be input as the physical characteristics of the measurement subject can be only the height. That is, the biometric apparatus of the present invention may be configured such that the physical feature of the measurement subject acquired by the acquisition means is height.

  Furthermore, in the embodiment, the relationship between the height and foot size for an average Japanese man and Japanese woman is used, but when the person being measured is a foreigner, the height for the foreigner and It goes without saying that the relationship (statistical data) with the foot size can be used.

  The present invention can be embodied in many forms without departing from its essential characteristics. Therefore, it is needless to say that the above-described embodiment is exclusively for description and does not limit the present invention.

1,201 Weight scale with body fat scale (Biometric device)
3 Display Unit 11 Light Emitting Element (Position Display Means)
20, 120 Measurement unit 7, 107, 207 Placement unit 21 Display / operation unit (acquisition means)
25 Storage Unit 26 Power Supply 29 Control Unit (Control Unit)
31L, 31R conducting electrode 131L, 131R conducting electrode 231L, 231R conducting electrode 32L, 32R measuring electrode 132L, 132R measuring electrode 232L, 232R measuring electrode 48 Impedance measuring section
60 Load cell 110 Raised portion 111, 211 Light irradiation means (position display means)
203 Display unit 220 Measuring unit 251 Support unit

Claims (7)

An acquisition means for acquiring the physical characteristics of the measurement subject;
A current-carrying electrode that supplies current to the body of the subject;
A measurement electrode for acquiring a voltage generated from a current path of a current supplied from the energization electrode and flowing through the body of the measurement subject;
An impedance measuring unit for calculating a bioimpedance of the person to be measured from a current supplied from the energizing electrode and a voltage measured by the measuring electrode;
Control means for determining a footrest position of the measurement subject's foot placed on the energization electrode and the measurement electrode based on the physical characteristics;
Position display means for performing display for indicating the footrest position determined by the control means ,
The biometric apparatus characterized in that the display for indicating the footrest position is displayed within and / or outside the area of the energizing electrode and / or the measurement electrode .   The biometric apparatus according to claim 1, wherein the physical characteristic is a height of the measurement subject.   The control means determines a foot size of the person to be measured based on the physical characteristics of the person to be measured obtained by the obtaining means, and determines the footrest position based on the foot size. The biometric apparatus according to claim 1 or 2.   The control means obtains a predetermined distance that is calculated by subtracting a value obtained by subtracting the separation distance between the energization electrode and the measurement electrode from the foot size, and from the edge of the measurement electrode, the energization electrode The biometric apparatus according to claim 3, wherein a position at which the predetermined distance is taken in the opposite direction is determined as the footrest position.   The biometric apparatus according to claim 4, wherein the footrest position is a position at which the measurement subject's heel is aligned.   The control means obtains a predetermined distance calculated by halving a value obtained by subtracting a distance between the energization electrode and the measurement electrode from the determined foot size, and from an edge of the energization electrode, The biometric apparatus according to claim 3, wherein a position at which the predetermined distance is taken in a direction opposite to the measurement electrode is determined as the footrest position.   The biometric apparatus according to claim 6, wherein the footrest position is a position where the toe of the measurement subject is aligned.

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