JP2001012997A - Scale - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scale separate from an indicator which indicates accurately measured results of a person's weight even when he/she holds the indicator. SOLUTION: When an examinee holding an indicator 27 steps on the scale body, a weighing unit 41 weights the examinee, a transmitter 14 of the scale body 10 sends the measured value to a receiver 51 of the indicator 27. In the indicator 27 a CPU 53 judges whether the examinee holds the indicator 27 or not and, if holding, indicates on an LCD 21 the weight value minus the weight of the indicator 27 from the weight value received from the scale body 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weight scale including a main body for measuring weight and an indicator separated from the main body.

[0002]

2. Description of the Related Art One of conventional weight scales is provided with a display unit for displaying a weight value on an upper surface of a flat body so that a person to be measured can know the weight displayed on the display unit by looking at his / her feet. However, since the user has to look at the display unit under the feet of the subject, there are the following problems. (1) If the display unit is enlarged to make the display easier to see, the main body becomes larger. When only the display unit is enlarged, the display unit is hidden by feet and cannot be seen. In addition, if a large amount of information is to be displayed on the display unit, the characters and numbers to be displayed must be reduced, so that it becomes difficult to see. (2) Scales are usually placed in washrooms and dressing rooms,
Lights provided in these places are often darker than living rooms and the like, so that it may be difficult to recognize the display on the display unit. (3) It is difficult for amblyopia, elderly people, and the like to see the display portion under the feet because they have low visual acuity. (4) Since the weight scale is based on the assumption that the measured value is measured while the measured person is standing, if the measured person bends to look at the display on the display unit, the weight value displayed on the display unit May fluctuate, making it impossible to recognize an accurate measurement value. (5) When the subject's belly is protruding, when the subject is a pregnant woman, or when the subject's thighs are thick,
When the subject faces downward, the display unit may not be visible.

[0003] Further, in one of conventional weight scales, a post is provided on an upper portion of a main body, and a display portion is arranged on the post so that the display on the display portion is easily viewed, so that the above problem does not occur. However, this type of scale is not suitable for ordinary households due to its location and storage because of its large size.

[0004] In view of the above, a weighing scale having a display unit separated from the weighing scale main body has already been proposed. This type of scale is roughly divided into the following. (1) As shown in FIG. 36, a flat main body and a display section are electrically connected to each other by a signal line (and a power cable) (first type). (2) As shown in FIG. 37, the main unit and the display unit are mechanically separated from each other, and perform non-contact communication (second type). (3) A detachable display is provided on the main body as in the weight scale disclosed in Japanese Patent Application Laid-Open No. 11-128196, and after the weight measurement is completed, the display is removed from the main body and the display contents are visually recognized at hand. What you can do (third type).

[0005]

However, the first,
The second type of weighing scale is based on the premise that the display unit is arranged at a place where the subject can easily see. For this reason, when the display unit is arranged at an appropriate position, if there is no suitable base, as shown in FIGS. 36 and 37, the display unit must be attached to the wall. In order to attach the mounting jig to the wall, it was necessary to make a hole in the wall or glue the mounting jig.

In the first and second types of scales,
When the display unit 2 is fixed to a wall when a plurality of users use the display unit, the display contents of the display unit may be difficult to read depending on the physique of the user.

In the third type of weight scale, the display must be removed from the main body after the weight measurement is completed, which is troublesome.

In view of the above-described problems, it is desirable that the subject be placed on the main body with the display (display section) held thereon, and that the weight value measured by the main body be displayed on the display. . In this case, since the weight of the display itself is added to the weight measured by the main body, the weight displayed on the display becomes heavier than the actual weight of the subject. This is not preferable when the subject is a person who cares about his / her own weight value. In addition, the measurement accuracy as a weight scale is reduced.

However, the above-mentioned first and second types of weighing scales do not assume that the person to be measured rests on the main body while holding the display unit 2; Depending on the position or the like, there is a possibility that the measurement may be carried by holding the display at the time of measurement.

Therefore, if the weight is measured while holding the display unit 2, the weight of the display unit 2 is added to the weight value of the subject. Accordingly, it is necessary for the subject to subtract the weight of the display from the displayed weight value ("tare" is performed), which may be troublesome for the subject.

On the other hand, in the third type of weight scale, when the display is attached to the main body, the display and the main body are electrically connected, and the weight value measured by the main body is transferred to the display. Configuration. Therefore, if the display is removed from the main body before the measurement of the weight is completed, the weight measured by the main body cannot be displayed on the display.

Further, like a third type of weight scale,
When the display is provided with a function as a body fat meter, if the weight of the display is added to the weight value of the subject when measuring the weight with the display, Since the value obtained by adding the weight of the display to the body weight of the subject is used as the body weight of the subject in the calculation of body fat, there is a possibility that the accuracy of the body fat meter may be reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and in a weighing machine having a display separated from a main body, even when a subject measures the weight while holding the display, an accurate weight can be obtained. An object of the present invention is to provide a weight scale whose measurement result is displayed on a display.

[0014]

The present invention employs the following configuration to solve the above-mentioned problems. That is, a first aspect of the present invention is a weight scale including a main body and a display separated from the main body and held by a subject. The main body includes a weight measuring unit that measures the weight of the subject when the subject is placed on the main body, and a transmitting unit that transmits the weight value measured by the weight measuring unit to the display in a non-contact manner. Including. A display unit, a display unit, a receiving unit that receives a weight value from the transmitting unit, and when the subject is holding the display device when the weight is measured by the weight measuring unit, the weight measurement is performed. A control unit for displaying on the display unit a weight value obtained by subtracting the weight of the display from the weight value measured by the unit as a display value.

According to the first aspect of the present invention, when the subject measures the weight while holding the display, the weight of the display is tared from the weight measured by the weight measuring unit. Since the weight value is displayed on the display unit, an accurate weight value can be shown to the subject even when the subject measures the weight with the display.

Here, the weight measuring unit is, for example, a load cell, and the load cell may be any of a strain gauge type, a magnetostrictive type, and a capacitance type.

As a communication method between the transmitting unit and the receiving unit, any communication method using infrared rays or radio waves (radio waves, RF, etc.) can be used as long as it is a non-contact method.

The control unit is, for example, a CPU (Central
ssing Unit), the weight value tared by the main unit may be displayed as a display value on the display unit, and the weight value tared by the display unit may be displayed as a display value. It may be configured to be displayed on a section.

In a first mode, when the control section measures the weight by the weight measuring section and the subject does not hold the display, the control section displays the weight value measured by the weight measuring section. The display value may be displayed on the display unit. With this configuration, when the weight is measured with the display placed on a table or fixed to a wall, the weight measured by the weight measuring unit is displayed on the display.

In a first aspect, the display further includes an electrode for making contact with a part of the body when the subject measures the weight while holding the display, and the control unit controls the measurement of the subject. When a part of the body is in contact with the electrodes, the weighted weight value may be displayed as a display value on the display unit.

For the electrodes, for example, an electrostatic switch that detects a change in capacitance caused by the subject's touching the electrodes can be used. For example, the display measures the bioimpedance of the subject. Further comprising an impedance measuring unit for measuring the bioelectrical impedance included in the impedance measuring unit, wherein the control unit controls the body weight in a state where the subject contacts a part of the body to the measuring electrode. Is measured and bioimpedance is measured by the impedance measuring unit, a value according to a health care guideline is calculated using the tared weight value and the measured bioimpedance value, A configuration may be adopted in which a value related to the pointer is displayed on the display unit.

In this way, when a function for calculating the value related to the health management guideline is added to the display device, the weight value that has been tared is used for calculating the value related to the health management guideline, so that accurate body weight can be obtained. A value for fat can be displayed. Values related to health management guidelines include, for example, body fat mass, body fat percentage,
The information includes lean body mass, body water mass (body water mass), visceral fat mass, visceral fat percentage, obesity level, basal metabolism, and the like.

In this case, the measuring electrode includes a left-hand electrode and a right-hand electrode, and the control unit determines the tared weight value when the subject touches the left-hand electrode and the right-hand electrode. The display unit may be configured to display the display value on the display unit.

In the first embodiment, the measuring electrode includes a left-hand electrode including a current-carrying electrode and a potential difference measuring electrode;
The control unit comprises a current-carrying electrode and a potential-difference measuring electrode, or a current-carrying electrode forming a right-hand electrode, which is a left-hand electrode for the subject to be measured. When the user touches the electrode for measuring a potential difference, the tared weight value may be displayed on the display unit as a display value.

In the first embodiment, the determination as to whether or not the subject is holding the display may be made before, during, or after the measurement of body weight. It is preferable that the unit is configured to determine whether or not a part of the body of the subject is in contact with the electrode after the weight value is received by the receiving unit.

A second aspect of the present invention includes a main body, and a display separated from the main body and held by a person to be measured. The main body has a measuring table, and the person to be measured rests on the measuring table. Sometimes a weight measurement unit that measures the weight of the subject, and a transmission unit that transmits the weight value measured by the weight measurement unit to the display unit in a non-contact manner, the display unit, a display unit, A receiving unit for receiving a weight value from the transmitting unit, holding teaching means for detecting that the subject is holding the display, and the subject holding the display by the holding teaching means; And a control unit for displaying, on the display unit, a weight value obtained by taring the weight of the display from the weight value measured by the weight measurement unit as a display value.

The holding teaching means may be constituted by, for example, a mechanical switch such as a closing switch or the like, and may be configured to detect the holding of the display by the subject by turning on the mechanical switch. By detecting a physical quantity such as pressure, the holding of the display by the person to be measured may be detected.

Further, in the first and second aspects, the display device comprises:
The weight may be approximately the minimum unit weight of the weight value measurable by the weight measurement unit or a multiple of the minimum unit weight. If the weight of the display unit is the weight of the minimum unit of the weight value that can be measured by the weight measurement unit or a multiple thereof, the minimum unit of the weight value that can be measured by the weight measurement unit and the minimum unit of the weight value that can be displayed by the display unit In the case where と and 風 match, there is no portion that is not displayed by the display unit due to the tare subtraction, so that an accurate weight value can be displayed.

However, if the minimum unit of the weight value measurable by the weight measuring unit does not match the minimum unit of the weight value measurable by the display unit, the weight of the display unit is set to the minimum value of the measurable weight value. This includes not only values that completely match the weight of the unit or weights that are multiples of the unit, but also values that do not completely match but fall within a range that does not affect the displayed value of the weight value or the value according to the health management guideline. That is, a value belonging to a range in which the displayed value is the same between a case where the weight value is not completely matched but the value is displayed by taring the value and a case where the weight value obtained by taring the completely matched value is displayed, If the value does not match, the value pertaining to the health management guideline is calculated and displayed using the weight value that has been tared, and the value pertaining to the health management guideline is calculated using the weight value that has been tared for the completely matched value. -In the case where it is displayed, it also includes a value belonging to a range in which the displayed value of the displayed health management guideline is the same.

In the first or second aspect, when the control unit displays the tared weight value as a display value on the display unit, the display value is the tared weight value. It is good also as a structure which notifies that. With this configuration, the subject can easily recognize whether or not the weight value displayed on the display unit has been tared.

Here, the configuration for notifying may be such that it is possible to recognize that the subject has been tared by the senses of sight, hearing, touch, etc. of the subject. For example,
It may be displayed that the tare has been subtracted, or may be configured to notify that the tare is subtracted by emitting light, voice, vibration, airflow, or the like.

In the first or second aspect, the main body has a front surface, and the transmitting section includes an infrared radiation source for radiating data to be transmitted to the display as an infrared signal. When the measurer is placed on the measuring table, it is arranged on the front side of the main body from the mounting center position of each foot and at a position that is substantially equidistant from the position of each foot, and on a vertical axis passing through itself. On the other hand, it has an emission range of an infrared signal around an axis inclined to the front side of the main body with itself as a fulcrum, and a receiving unit has an infrared sensor for detecting an infrared signal emitted from the infrared radiation source, The sensor may be provided below the display unit.

The infrared radiation source is, for example, an infrared light emitting diode. The central axis of the radiation range is, for example, an axis inclined about 5 to 45 ° from the vertical axis to the front side of the main body, and particularly an axis inclined by 20 ° from the vertical axis to the front side of the main body. Further, the radiation range is about 15 ° with respect to the center axis in the front direction of the main body and the opposite direction with the infrared radiation source as a fulcrum.
It is preferable to have the range of.

[0034]

Embodiments of the present invention will be described below with reference to the drawings.

Embodiment 1 <External Configuration of Weight Scale> First, referring to FIGS. 1 and 2,
An external configuration of the weight scale according to the first embodiment of the present invention will be described. FIG. 1 shows a main body 10 of a weight scale according to an embodiment of the present invention.
2A is a front view of the display 20 of the weight scale according to the first embodiment of the present invention, and FIG. 2B is a perspective view of FIG. FIG. 2C is a left side view of the display 20 shown in FIG. 2A.

As shown in FIG. 1, the main body 10 is formed in a rectangular flat plate shape, and the upper surface thereof is a measuring table on which the subject is placed for measuring the weight. On the upper surface of the main body 10, a concave groove 11 is formed on the center line of the main body 10,
The subject can be placed on the main body 10 properly by arranging the soles symmetrically with respect to the concave grooves 11.

At the front end of the groove 11, there is provided a window 12 of a transmission unit for transmitting data from the main body 10 to the display 20 in a non-contact manner. In the present embodiment, the main body 10 and the display 20 are configured to transmit and receive data using infrared rays. Inside the window 12, as shown in FIG.
An infrared light emitting diode 14 as an infrared radiation source is arranged. Also, inside the window 12, a light emitting diode indicating that the power supply 16 of the main body 10 is in an ON state.
(LED) 15 is provided.

In other words, the infrared light emitting diode 14 is located at a position closer to the main body 10 than when the subject is placed on the measuring table of the main body 10 and each foot is placed at an appropriate position for measuring the weight. On the front side and at a position substantially equidistant from the position of each foot.

Returning to FIG. 1, a push-type power switch 13 for turning on the power supply 16 is provided on the back of the main body 10.
Is provided so that the person to be measured can press with a toe of a foot. When the power switch 13 is pressed, FIG.
LED 15 emits light. Various power supplies such as a dry battery, a rechargeable battery, a storage battery, and a commercial power supply can be used as the power supply 16 of the main body 10.

The display 20 displays the weight value of the subject and functions as a body fat meter of the subject. FIG.
As shown in (a), the display 20 is formed in a rectangular shape in which the left-right direction is longer than the up-down direction. ) 21 are provided.

Below the LCD 21, a plurality of operation button groups 22 are arranged. The operation button group 22 includes a power button 23, a setting button 24 including two cursor buttons (“▼” button and “▲” button), and a decision button (button on which “setting” is drawn); A measurement button 25 and a record button 26 for recording values relating to body weight and body fat (corresponding to values relating to health care guidelines) displayed on the LCD 21
And a period button 27 for determining when to display the average value of the values relating to the weight value and the body fat on the LCD 21, and the weight value and the body fat recorded on the display 20. A call button 28 for displaying such a value on the LCD 21 is provided.

On both sides of the LCD 21 and the operation button group 22, four terminals for measuring the bioimpedance of the subject are provided.
As electrodes, left-handed electrodes 29 and 30 and right-handed electrodes 31 and 32 are provided. Each of the electrodes 29 and 31 forms a current-carrying electrode, and each of the electrodes 30 and 32 forms a potential difference measuring electrode. Each of the electrodes 29 to 32 is provided from the front surface of the display 20 to the left side surface or the right side surface, as shown in FIG.

A light receiving window 33 of a receiving section for receiving data transmitted from the main body 10 is provided below the display 20. As shown in FIGS. 2A and 2B, the light receiving window 33 is provided from the front to the back of the display 20 and receives the infrared rays emitted from the main body 10. As shown in FIGS. 13A and 13B, the inside of the light receiving
Two infrared sensors 51 are provided.

On the back of the display 20, a power supply for the display 20 is provided.
A (battery) cover 34 is provided, and the battery can be replaced by removing the cover from the display 20. In addition, a dry battery, a rechargeable battery, and a storage battery can be used as the power source of the display 20. In addition, a slot 35 is formed on the rear surface of the display 20 for hooking the display 20 on a mounting jig (a nail, a screw, a hook, a hanger, etc.) of the display 20 mounted on the wall and fixing the display 20 to the wall. Have been.

<Circuit Configuration of Weight Scale> Next, the circuit configuration of the weight scale will be described. FIG. 3 is a circuit configuration diagram of the scale shown in FIGS. 1 and 2. Referring to FIG.
Is a strain gauge sensor (strain gauge type load cell) 41, an amplifier circuit 42 connected to the strain gauge sensor 41, and an A / D connected to the amplifier circuit 42.
A CPU to which an (analog / digital) conversion circuit 43, an infrared light emitting diode 14, an LED 15, a power supply 16, an A / D conversion circuit 43, a memory 45, and a buzzer 46 are connected.
(Central Processing Unit) 44.

When the power switch 13 is turned on, the power supply 16 supplies power for operation to each unit such as the CPU 44 of the main body 10.

The strain gauge sensor 41 outputs an electric signal according to the load (weight) of the subject on the measuring table and inputs the signal to the amplifier circuit 42. The amplification circuit 42
The signal input from the strain gauge sensor 41 is amplified and input to the A / D conversion circuit 43. A / D conversion circuit 4
3 converts the signal input from the amplifier circuit 42 into an analog / digital signal and then inputs the signal to the CPU 44.

The CPU 44 executes a predetermined control program stored in the memory 45. This allows the CPU
The reference numeral 44 controls the LED 15, the infrared light emitting diode 14, and the buzzer 46 by providing predetermined control signals in accordance with input signals from the power switch 13, the power supply 16, and the A / D conversion circuit 43.

For example, when the CPU 44 receives a signal corresponding to the weight of the subject from the A / D conversion circuit 43, the CPU 44 calculates the weight value of the subject using the signal, and converts the weight value into the calculated weight value. The corresponding data is sent to the infrared light emitting diode 14.
As a control signal. The processing by the CPU 44 will be described later.

The memory 45 is a ROM (Read Only Memory)
And RAM (Random Access Memory) etc.
It forms a work area for the CPU 44 and holds a control program executed by the CPU 44.

The infrared light emitting diode 14 includes a CPU 44
And emits an infrared signal corresponding to the weight value data input from the computer. Thus, the weight value measured by the main body 10 is transmitted to the display 20. LED 15 is CPU1
The light is turned on according to the control signal input from 5. Buzzer 4
Reference numeral 6 outputs a predetermined buzzer sound according to a control signal input from the CPU 44.

The strain gauge sensor 41, the amplification circuit 42, the A / D conversion circuit 43, and the CPU 44 correspond to the weight measuring unit of the present invention, and the CPU 44 and the infrared light emitting diode 14 correspond to the transmitting unit of the present invention. .

On the other hand, in FIG.
D21, operation button group 22, infrared sensor 51,
An infrared receiving circuit 52 and a CPU (Central Processing Un
it) 53, a memory 54, and a power supply 55,
Further, the display 20 includes electrodes 29 to 32, a constant current generation circuit 56, an amplification circuit 57, and an A / D conversion circuit 58 in order to measure the biological impedance of the subject.

The infrared sensor 51 detects an infrared signal emitted from the infrared light emitting diode 14 and inputs a signal corresponding to the infrared signal to the infrared receiving circuit 52. The infrared receiving circuit 52 converts (decodes) an input signal from the infrared sensor 51 into a signal to be input from the CPU 44 to the infrared light emitting diode 14 and inputs the signal to the CPU 53.

When the power button 23 (see FIG. 2A) of the operation button group 22 is pressed, the power is
It is supplied to each part of the display 20 such as U53. The operation button group 22 inputs a signal corresponding to the pressed button to the CPU 53.

When receiving a control signal from the CPU 53, the constant current generating circuit 56 applies a predetermined high-frequency current to the electrode 2
9 and the electrode 31 are energized. As a result, the potential difference between the electrode 30 and the electrode 32 is
The analog signal is amplified by the A / D conversion circuit 58, and is then input to the CPU 53.

The CPU 53 executes a predetermined control program stored in the memory 54. This allows the CPU
The control unit 53 controls the LCD 21 and the constant current generation circuit 56 according to signals input from the operation button group 22, the power supply 55, the infrared receiving circuit 52, and the A / D conversion circuit 58. .

For example, when a signal relating to the weight of the subject is input from the infrared receiving circuit 52, the CPU 53 causes the LCD 21 to display a weight corresponding to the signal of the weight. When a signal relating to a potential difference between the electrodes 30 and 32 is input from the A / D conversion circuit 58, the CPU 53 calculates an impedance from the signal relating to the potential difference, and calculates the calculated impedance value of the subject. Using the bioimpedance value as the bioimpedance value, and using the bioimpedance value as a value related to the health management guidelines of the subject (body fat percentage, body fat mass)
Is calculated, and the value related to the calculated health management guideline is displayed on the LCD 21.
To be displayed. The processing by the CPU 53 will be described later.

The memory 54 is a ROM (Read Only Memory)
And a RAM (Random Access Memory), which is used as a work area of the CPU 53. The memory 54 holds a control program executed by the CPU 53.

Further, the memory 54 stores a user of the scale.
A personal data storage area that holds personal data (sex, age, and height values) of the (subject), and past measurement data (weight measured in the past) of the subject that stores personal data in the personal data storage area It has a measurement data storage area for storing values and values (body fat percentage, body fat mass) relating to body fat measured in the past. In this embodiment, the display 20 has a maximum of four.
Personal data of a person can be registered, and four personal data storage areas and four measurement data storage areas are provided.

The LCD 21 corresponds to the display unit of the present invention, the infrared sensor 51 and the infrared receiving circuit 52 correspond to the receiving unit of the present invention, and the CPU 53 corresponds to the control unit of the present invention. Further, each of the electrodes 29 to 32, the constant current generation circuit 5
6, amplification circuit 57, A / D conversion circuit 58 and CPU 53
Corresponds to the impedance measuring unit of the present invention.

FIG. 10 is an explanatory diagram of the display contents of the LCD 21. The LCD 21 displays all lighting segments (hereinafter, referred to as
When “segment” is turned on, the contents shown in FIG. 10 are displayed.

Each segment will be described in order from the top.
The first row from the top is "3 months""2months""1month"
The segments "14th", "7th", "previous" and "latest" are arranged, respectively, and when the measurement data stored in the personal data storage area is displayed on the LCD 21, the segments are displayed in an appropriate combination. Is done. This makes it possible to recognize when the displayed measurement data is.

At the center of the first row from the top, a white character segment of “Receive” is arranged, which is turned on when the display 20 receives an infrared signal from the main body 10, and Prompts the user to place the display 20 in a good reception range.

Further, on the left side of the second row from the top, segments of “height”, “weight”, and “body fat percentage” indicating measurement items are arranged, respectively. .
Segments that can display from "0" to "199.9" are arranged. On the left side, segments of "%" and "cm" indicating units of height and body fat percentage are arranged.

On the other hand, on the right side of the second row from the top, segments of “weight” and “body fat mass” indicating measurement items are arranged, and on the lower side, measurement values of “0.0” to “0.0” are displayed. “19
A segment that can display up to 9.9 "is arranged, and on the left side,"% "indicating a unit of weight or body fat percentage is displayed.
A segment of “kg” is arranged.

Further, on the right side of the segment of "body fat mass", a lighting segment of "weight reduction" is arranged, and lights up when the display 20 is tared in weight measurement.

On the left side of the lowest row, segments of "guest", "A", "B", "C", and "D" are arranged as individual setting items. As described above, the display 2
0 is capable of recording personal data and measurement data of up to four subjects, and each of “A” to “D” is a personal setting number assigned to the subject to record data; Those other than "A" to "D" are treated as "guests". These lighting segments are the operation button group 2
Either one is displayed in accordance with the operation of the display 20 in 2.

On the right side of the segment “D”,
A segment with white characters of “measurement posture” is arranged, and the posture when measuring bioimpedance
Lights when prompting the subject to take a measurement (referred to as “measurement posture”).

On the right side of the “measurement posture” segment, a segment of a symbol (warning symbol) with an X mark on the battery is arranged, and the remaining amount of the battery mounted on the display 20 is reduced. Lights when it is turned on.

On the right side of the lighting segment of the warning symbol, a segment of a white character “under measurement” is arranged, which lights during measurement of body weight and body fat to indicate that these measurements are being performed. Show to the subject.

Further, an age segment capable of displaying “00 years old” to “99 years old” is arranged on the right side of the “measurement” segment, and “age” is displayed below this age segment. Are provided by any method such as printing, pasting, and embossing.

On the right side of the age segment, “male” and “female” segments (sex segments) indicating gender are arranged, and one of them is lit to indicate the gender of the subject. . Below this gender segment,
The character “sex” is provided by any method such as printing, pasting, and embossing.

Further, an indicator for judging obesity is provided below each of the “measurement posture”, the warning symbol, and the “measurement” segment. This indicator is composed of 12 dot segments arranged in series, and the number corresponding to the measured body fat percentage is turned on from the left, and the rightmost one that is turned on blinks. Thus, the determination of obesity is displayed in 12 levels.

Under the dot segment, the characters “thin”, “standard”, “light obesity” and “obesity” are printed from left to right.
It is provided by any method such as pasting, embossing, etc., and the measured person recognizes the character located below the blinking dot segment, so that each character can be used as a guide for judging obesity. It is possible.

<Processing by CPU> Next, processing by the CPUs 44 and 53 shown in FIG. 3 will be described with reference to FIGS. FIG. 4 shows the CPU 44 of the main body 10 shown in FIG.
FIG. 7 is a flowchart showing a process according to FIG.
4 is a flowchart showing processing by the CPU 53 of the display 20 shown in FIG.

First, processing by the CPU 44 of the main body 10 will be described. In FIG. 4, the CPU 44 starts processing when the power switch 13 of the main body 10 is turned on. When the power switch 13 is turned on, the CPU 44
The operating power is received from the power supply 16 to turn on the LED 15 (step (hereinafter, referred to as “S”) 01).

Next, the CPU 44 performs calibration (zero adjustment) of the weight scale (S02), and when the calibration is completed, transmits a calibration end signal to the display 20 through the infrared light emitting diode 14 (S03). That is, the CPU 44 inputs a power ON signal to the infrared light emitting diode 14. Then, the infrared light emitting diode 14 emits an infrared signal according to the calibration end signal. This infrared signal is transmitted to the display 20 through the window 12 (see FIG. 1).

Thereafter, the CPU 44 causes the buzzer 46 to output a buzzer sound indicating that the weight can be measured (S04). Note that the calibration end signal is sent from the
The infrared light emitting diode 14 continues to be radiated from the infrared light emitting diode 14 until the measurement is started on the measurement table of zero.

Thereafter, when the subject is placed on the measuring table of the main body 10 according to the buzzer sound (S05), the CPU 44 weighs (measures) the weight of the subject according to the signal output from the strain gauge sensor 41 (S05). S06). At this time, C
The PU 44 measures the weight value in units of 200 grams (0.2 “kg”) and transmits the measured weight value to the display 20.
(S07). Thereafter, the CPU 44 repeats the processing of S06 to S08 until it is determined in S09 that the weighing value is stabilized.

After that, when the measured value of the weight value is stabilized by maintaining the posture of the measured person on the measuring table, the CPU 44 determines the stable measured value as the weight value of the measured person, The determined weight value is transmitted to the display 20 (S09). That is, the CPU 44 gives the determined weight value to the infrared light emitting diode 14, and causes the infrared light emitting diode 14 to emit an infrared signal according to the determined weight value.

Thereafter, the CPU 44 transmits a signal to end the measurement of the weight to the display 20 (S11), and turns off the power supply 16 after a lapse of a predetermined time by the automatic power-off function.
(S12). When the CPU 44 determines the weight value, a sound indicating the end of the weight measurement may be output from the buzzer 46.

Next, processing by the CPU 53 of the display 20 will be described. In FIG. 5, the CPU 53 of the display 20
Indicates that the CPU operates when the power button 23 (see FIG. 1) is pressed.
Wait for power ON signal to be input to 53
(S001). Thereafter, when the power ON signal is input from the power button 23, the CPU 53 waits for the input of the calibration end signal transmitted from the main body 10 (S002).

After that, by the processing of S02 shown in FIG. 4, a calibration end signal is transmitted from the main body 10 to the display 20, detected by the infrared sensor 51, and input to the CPU 53 through the infrared receiving circuit 52. CPU
53 displays the weight value “0.0 [kg]” on the LCD 21 (S003).

Thereafter, the CPU 53 executes the processing in S0 shown in FIG.
Waiting for the input of the weight value transmitted from the main body 10 by the processing of 7 or S09 (S004), and when the weight value is input (S004; Yes), the weight value is displayed on the LCD 21 in units of 0.2 kilograms. Digital display (S00
5) Thereafter, the CPU 53 determines whether or not a measurement end signal has been received from the main body 10 (S006). If not (S006; No), the process returns to S004.
As described above, the CPU 53 repeats the processing of S004 to S006 until receiving the measurement end signal from the main body 10.
As a result, the manner in which the weight value increases or decreases is displayed on the LCD 21.

Thereafter, when receiving the measurement end signal after receiving the determined value of the weight value from the main body 10, the CPU 53
After making a determination of “Yes” in S006, the process proceeds to S0 in FIG.
In step 07, an inter-electrode impedance measurement process is performed.

That is, the CPU 53 includes a constant current generation circuit 56.
To the constant current generating circuit 56 to supply a high-frequency current (for example, 50 kHz, 5 kHz) between the electrode 29 and the electrode 31.
(A current of 0 mmA). Thereby, the electrode 30
The signal relating to the potential difference (impedance) between the
It is input to PU53. If the impedance value at this time is less than 1500 ohms, the process proceeds to S009. If it is 1500 ohms or more, the process proceeds to S010.

When the process has proceeded to S008, the CPU 53 determines that the subject does not hold the display 20 (the display 20 is fixed on a wall or a table) and has already received the display. LCD 21 uses the determined weight value as a display value.
Is displayed, and the displayed value is made to blink for a predetermined period of time so that the subject can recognize that the weight value is a definite value. Thereafter, the CPU 53 advances the processing to S011.

On the other hand, the CPU 53 executes the processing in S00.
In the case of proceeding to 9, the subject is assumed to be holding the display unit 20 and the weight of the display unit 20 is tared from the already received definite value of the weight value. Here, since the display 20 according to the present embodiment has a weight of 400 grams (0.4 kilograms), the CPU 53 subtracts 0.4 kilograms from the determined weight value.

Thereafter, the CPU 53 displays the tared weight value on the LCD 21 as a display value, and blinks the display value for a predetermined time. At the same time, the CPU 53
Along with the display value, the character "weight subtraction" is displayed on the LCD 21 near the display value (S010). As a result, the subject can recognize that the blinking weight value is a tared definite value. Then the CPU
The step 53 advances the process to S011.

When the process has proceeded to S011, the CPU 53 waits for the mode prepared on the display 20 to shift from the weight measurement mode to the body fat measurement mode. That is,
The CPU 53 operates the operation buttons 22 during a period from when the display value of the weight value is displayed on the LCD 21 until a predetermined time elapses.
The middle body fat measurement button 25 (see FIG. 2A) is pressed, and waits for a signal corresponding thereto to be input to itself.

At this time, if a signal corresponding to the body fat measurement button 25 has not been input to the CPU 53 by a predetermined time (time-out: S011; No), the CPU
53 turns off the power supply 55 of the display 20 by the automatic power off function (S018). On the other hand, when a signal corresponding to the body fat measurement button 25 is input to the CPU 53 before the predetermined time has elapsed (S011; Yes).
Then, the CPU 53 advances the processing to S012.

When the processing has proceeded to S012, the CPU 53 performs personal data input / read processing. That is,
When the subject has registered his / her personal data (sex, age, and height) in any of the personal data storage areas of the memory 54, the CPU 53 stores the corresponding personal data from the personal data storage area. Read the LC to the subject
Prompt through D21. In response, when the subject inputs a personal data readout instruction using the operation buttons 22, the CPU 53 reads out the corresponding personal data from the personal data storage area and displays it on the LCD 21.

On the other hand, when the subject has not registered his / her personal data, the LCD 2 informs the subject that the personal data is to be input by operating the operation button group 22.
Prompt through 1. In response to this, when personal data is input to the CPU 53 through the operation button group 22, the CPU 5
3 displays the input personal data on the LCD 21.

After that, the CPU 53 displays the characters “measurement posture” on the LCD 21 so that the measurement posture for measuring body fat (the palms of both hands are appropriately brought into contact with the respective electrodes 29 to 32 to hold the display 20). Then, the subject is urged to take a posture in which both arms are extended along the horizontal direction), and then the process proceeds to S013.

When the process has proceeded to S013, the subject takes a measurement posture before the predetermined time has elapsed from the end of the process in S012, and thereby each palm is placed on the electrode 2
It is determined whether or not 9 to 32 are properly contacted. At this time, if the CPU 53 determines that the subject has not taken the measurement posture before the lapse of the predetermined time (S013; No), the CPU 53 displays an error on the LCD 21 (S014), and then turns off the power by the auto power-off function. Turn 55 off
(S018).

On the other hand, if the CPU 53 determines that the subject has taken the measurement posture before the predetermined time has elapsed (S0
13; Yes), a control signal is input to the constant current generation circuit 56. Then, the constant current generating circuit 56 causes a high frequency to flow between the electrode 29 and the electrode 31 through the body of the subject according to the control signal. As a result, the potential difference between the electrode 30 and the electrode 32 is amplified by the amplifier circuit 57, analog / digital converted by the A / D converter circuit 58, and then input to the CPU 53. The CPU 53 measures the bioelectrical impedance value of the subject by calculating the impedance from the potential difference (S015).

Subsequently, the CPU 53 determines in S008 or S0
Display value of the weight value obtained by the processing of Step 10, S012
Personal data (gender, age, height) obtained by processing
Then, by substituting the bioimpedance value obtained in S015 into a predetermined body fat value calculation formula held in the memory 54, a value (body fat amount, body fat percentage) relating to body fat is calculated (S016). ).

Thereafter, the CPU 53 displays the calculated value of the body fat on the LCD 21 (S017), and turns off the power supply 55 after a lapse of a predetermined time by the auto power off function.

In the process shown in FIG. 6, S01
In the processing of step 2, when the subject reads the personal data from the personal data storage area, the subject operates the operation button group from the end of S017 until the power supply 55 is turned off by the auto power off function. Record button 2 in 22
6 (see FIG. 2A), a signal corresponding to the recording button 26 is input to the CPU 53, and the CPU 53 changes the displayed weight value and body fat value according to the input signal. It is stored in the corresponding measurement data storage area of the memory 54.

In this embodiment, when an alkaline battery is set as the power supply 56 in the display 20, the display 2
The weight of 0 becomes 0.4 kg, and 0.4 kg is subtracted from the weight value received at the time of taring. However, the weight is reduced according to the type of the power supply 56 set on the display 20. May be changed.

<Example of use of weight scale> Next, an example of use of the above-described weight scale will be described. FIG. 7 is an explanatory diagram showing a state in which the subject measures the weight by holding the display 20;
FIG. 8 is an explanatory diagram showing a state of a subject at the time of measuring body fat, and FIG. 9 is an explanatory diagram showing a state of measuring the body weight with the display 20 fixed to a wall. 11
13 are diagrams showing display examples on the LCD 21 of the display 20. FIG.

When measuring the body weight, the subject turns on the power switch 13 of the main body 10 with his toes. Then, the power of the main body 10 is turned on, the LED 15 is turned on (S01), and the calibration process is performed (S02, S03),
After that, a buzzer sounds to indicate that weight measurement can be started
(S04).

Thereafter, the subject presses the power button 23 of the display 20 to turn on the power supply 55 of the display 20.
(S001), when the display 20 receives the calibration end signal
(S002; Yes), the LCD 21 displays "Weight 0.0 kg" and the characters "receiving" as shown in FIG.

Thereafter, the subject holds the display 20 in the same manner as the body fat is held in the measurement posture. That is,
As shown in FIG. 7, a state in which the left hand palm contacts the electrodes 29 and 30 and the right palm contacts the electrodes 31 and 32 so that the left and right sides of the display 20 are grasped from the front side. And has a display 20.

Thereafter, when the subject is put on the main body 10 in response to the buzzer sound (S05), the weight of the subject is measured.
(S06), an infrared signal corresponding to the measured weight value is transmitted to the display 20 (S07). Then, the infrared signal is detected by the display 20, and the weight value corresponding to the infrared signal is displayed on the LCD 21 (S004, S005).

Thereafter, when the measured value of the weight is stabilized by the subject taking a stable posture, the measured value is transmitted as a definite value of the weight (S09), and then a measurement end signal is transmitted (S10). ). Thereafter, the power supply 16 of the main body 10 is turned off by the auto power off function.

Upon receiving the confirmed weight value and the measurement end signal, the display 20 determines whether or not the subject has the display 20 (S007).
(S007; Yes), the display 20
Is tared (S009).

At this time, the weight (0.4 kg) of the indicator 20 to be tared is a multiple of the minimum unit (0.2 kg) of the body weight that can be measured by the main body 10. Thus, it is possible to prevent a portion that is not displayed in the display value from occurring. Therefore, an accurate weight value can be displayed on the LCD 21 within a range that can be measured by the main body 10.

Thereafter, as shown in FIG. 12, the confirmed value (display value) of the tared weight is displayed on the LCD 21 together with the word "weight reduction". Thereby, the display 20
Even if the subject measures weight while holding the
The correct weight value is displayed on the LCD 21 of the display 20.
Also, by holding the display device 20 in hand, it is possible to easily view the display contents of the LCD 21 and to easily prevent another person from seeing the measurement result.

Thereafter, when the subject presses the body fat measurement button 25 of the display 20, the mode of the display 20 shifts from the weight measurement mode to the body fat measurement mode (S011). At this time, the subject inputs or reads out personal data (height value, age, gender) according to the instruction displayed on LCD 21.
(Call) (S012).

At this time, if the subject is “guest”, the setting button 2
By operating 4, the user can input the height value, age, and gender. On the other hand, when the subject has registered personal data, the subject specifies the personal setting number (any one of A to D) assigned to the subject by operating the setting button 24, and sets the call button 28. By pressing, the corresponding personal data (height value, age, gender) can be called (read).

Thereafter, as shown in FIG. 8, when the subject takes a predetermined measurement posture (S013), the bioimpedance value of the subject is calculated.
The body fat amount and the body fat percentage are calculated using the weight value, the height value, the age and the sex, and are displayed on the LCD 21 (see FIG. 13).

At this time, if the person to be measured has registered personal data in the personal data storage area of the memory 54 in advance, pressing the record button 26 of the display 20 causes the body weight, body fat mass, The fat percentage can be stored in the corresponding measurement data storage area. After that, the display 20
It is turned off by the auto power off function.

The above-mentioned use example is an example in which the weight is measured while holding the display device 20 in the hand. However, the weight scale according to the present embodiment measures the weight even when the display device 20 is fixed to the wall. Can be. That is, when the subject is placed on the main body 10 with the power of the main body 10 and the display 20 turned on and takes a stable posture as shown in FIG. 9, the determined weight value and the measurement end signal are displayed on the display. 20.

When the display 20 receives the confirmed weight value and the measurement end signal, it is determined whether or not the subject is holding the display 20 (S007), and the display 20 is not held (S007). (S007; No), the determined value of the weight is directly displayed on the LCD 21 as a display value (S008),
The letters "weight subtraction" are not displayed.

As described above, it is determined whether the subject holds the display 20 or not, so that the accurate weight value can be obtained regardless of whether the subject holds the display 20 or not.
D21. That is, the accurate weight value can be displayed on the LCD 21 regardless of whether the user holds the display 20 or is fixed to the wall of the display 20.

<Data Transmission / Reception Range> As described above,
In the weight scale according to the present embodiment, the main body 10
And the display 20 are transmitting and receiving data. At this time, as the number of infrared radiation sources (for example, infrared light emitting diodes) for transmitting data increases, the transmission range of the infrared signal increases, so that the reception sensitivity of the display device 20 can be improved. However, providing a large number of infrared radiation sources is not preferable because it causes an increase in the number of parts of the weight scale and causes an increase in cost. Thus, the weight scale according to the present embodiment has the following configuration so that good data transmission and reception can be performed without providing a large number of infrared radiation sources in the main body 10.

FIGS. 14 and 15 are views in which the display 20 shown in FIG. 2 is partially cut away so that an infrared sensor 51 inside can be seen. FIGS. FIG. 4 is an explanatory diagram illustrating a signal emission range.

As shown in FIG. 14 and FIG.
Infrared sensors 51, 51 are arranged inside the light receiving window 33 of the front side and the rear side, respectively. These infrared sensors 51, 51 have a light receiving range of an infrared signal of about 150 ° in the front-back direction of the display 20.

The light receiving range is set such that the light receiving range on the front side of the display 20 is smaller than the light receiving range on the rear side. When the display 20 is held by the person to be measured, This is in view of the fact that the upper side of the display 20 is often held in a state inclined to the back side.

As shown in FIG. 16, the infrared light emitting diode 14 of the main body 10 has a central axis L of a radiation range (considered to be conical) of an infrared signal on a vertical plane which divides the main body 10 in the front-rear direction into approximately two equal parts. Is provided, and the emission range of the infrared signal is set to about 15 ° with respect to the central axis L (that is, the emission range is a cone having a vertex angle of about 30 °). .

As shown in FIG. 17, the central axis L of the radiation range is inclined toward the front side of the main body 10 at an angle of about 70 ° with respect to the horizontal plane on the vertical plane. That is, the center axis L is about 20 degrees from the vertical axis AX on the vertical plane passing through the infrared light emitting diode 14 toward the front side of the main body 10 with the infrared light emitting diode 14 itself as a fulcrum.
° tilted. The radiation range of the infrared signal is approximately 55 ° to 85 ° with respect to a horizontal plane in the front-rear direction (on the vertical plane) of the main body 10 (15 ° in the front and rear directions of the main body 10 from the central axis L). It has become.

As shown in FIGS. 4 to 6, in the weighing machine according to the present embodiment, the transmission and reception of data between the main body 10 and the display 20 are performed after the power supply 16 of the main body 10 is turned on.
0 is performed until the measurement end signal is received. That is, transmission and reception of data are mainly performed by the subject under the display 2.
This is performed when the user is placed on the main body 10 while holding the zero and is in the posture for measuring the weight.

As shown in FIG. 18, during measurement of body weight (when the body is in a posture for measuring body weight), the subject
It is considered that the user is looking at the display content of No. 21. At this time, the subject should use the display 2 to view the display contents comfortably.
It is considered that 0 is placed at a position separated from the eyes by about 20 cm or more. On the other hand, the subject is intended to measure body fat, and it is also conceivable to measure body weight in a body fat measurement posture.

Here, considering the height and arm length of the human body, there is a certain correlation between the height and the arm length, and it is known that this correlation hardly changes with age and physique. In other words, it is known that when a plurality of persons with different physiques stand at the same position and extend their arms, the tips of the arms are arranged substantially on the same straight line.

In view of this, in the weight scale according to the present embodiment, the central axis L of the emission range of the infrared signal intersects with the display 20 when the subject takes the body fat measurement posture when measuring the weight. Is set to about 1 from the central axis L.
By setting the range tilted by 5 ° as the radiation range, the display 20 emits light even when the subject is bending his elbow to draw the display 20 to the chest so that the display 20 can be easily viewed when measuring the weight. Being in the range.

As shown in FIG. 4, the subject cannot rest on the main body 10 until the calibration process is completed and the buzzer 46 sounds, so that the display 20
May not be within the emission range of the infrared signal.
For this reason, the calibration end signal is continuously emitted even after the buzzer 46 sounds, and the subject is placed on the main body 10 in accordance with the buzzer sound and takes a posture for measuring the weight, so that the display 20
Enters the radiation range, and the calibration end signal is received by the display 20.

As described above, in the weight scale according to the present embodiment, one infrared light emitting diode 14 can sufficiently transmit and receive data between the main body 10 and the display 20. Therefore, there is no need to provide a large number of infrared light emitting diodes 14. As a result, a decrease in the number of parts can be suppressed, and an increase in cost can be suppressed.

<Reading of Measurement Data> As described above, in the weighing machine according to the present embodiment, a maximum of four
The personal data (height value, age, gender) of each person to be measured can be registered in the personal data storage area of the memory 54. The subject who has registered the personal data can read the personal data and use it for the measurement of body fat every time the value relating to the body fat is measured.

The subject who registered the personal data is
Every time a weight value or a value related to body fat is measured, these measurement results can be recorded in the measurement data storage area of the memory 54 as measurement data, and can be called up as needed thereafter. Hereinafter, recording and calling of the measurement data will be described.

Here, the measurement data storage area of the memory 54 will be described. The measurement data storage area is provided for each of the personal setting numbers A to D. FIG. 19 is an explanatory diagram of the measurement data storage area, and shows a measurement data storage area corresponding to a certain personal setting number as an example. In FIG. 19, the measurement data storage area includes a measurement value storage area and an average value storage area.

In the measurement value storage area, the latest measurement values (weight, body fat mass, body fat percentage) of the current date (also called the current date) X are stored.
Is stored. On the other hand, the average value storage area stores the average value of the measured values on the current day and each day from the current date to the day before 99 days. In the average value storage area, each time the date changes, the next address becomes the average value storage area for the current day. When the average value storage area of the current day is the last address, the start address is the average value storage area of the current day on the next day.

FIGS. 20 and 21 are flowcharts showing the processing of the CPU 53 relating to recording and calling of measurement data. In FIG. 20, the CPU 53 includes a display 20.
The processing is started when the battery is set in.

First, the CPU 53 performs a system reset. That is, the CPU 53 initializes all the circuits under its control (S301). Next, the CPU 53
The date counter and the time counter held or controlled by the self are reset (S302).

Next, the CPU 53 counts the time by incrementing the time counter (S30).
3) Thereafter, it is determined whether or not the counter value of the time counter has reached a value indicating that 24 hours have elapsed (S304).

At this time, if the counter value does not exceed 24 hours, the CPU 53 advances the processing to S306. On the other hand, if the counter value indicates that 24 hours have elapsed, the CPU 53 increments the counter value of the date counter by one. Also, the CPU 53
Clears the number of recordings of the measured value recorded during the past 24 hours and clears the integrated recording value WSUM.
(S305). Thereafter, the CPU 53 advances the processing to S306. Here, the recorded integrated value WSUM is a value obtained by integrating the number of recording times with the average value of each measured value (weight value, body fat mass, body fat percentage) recorded on the current day. Thus, the CPU 5
Reference numeral 3 indicates time counting regardless of ON / OFF of the power button 23, and increments the date counter by one every 24 hours after the battery is inserted.

In S306, the CPU 53 determines whether or not the power switch has been depressed, that is, the power button 23 (FIG. 2).
It is determined whether or not (see (a)) has been inserted. If it has not been inserted (S306; No), the process returns to S303. If it has been inserted, the process proceeds to step S307, and As one of display contents (personal setting number specifying display) for the subject to specify his or her personal setting number, the segment of “guest” is blinked on the LCD 21.

In S307, the CPU 53 determines whether or not the subject has changed the currently selected personal setting number by operating the setting button 24. That is, CP
U53 determines whether or not one of the setting buttons 24 is pressed. At this time, if the cursor button has been pressed, the process proceeds to S308, and if the cursor button has not been pressed, the process proceeds to S309.

In S308, the CPU 53 changes the personal setting number displayed on the LCD 21 in response to the operation of each cursor button, thereby causing the subject to specify the personal setting number. That is, the CPU 53 sets “▲”
Each time the cursor button is pressed, it turns clockwise ("guest"
→ "A" → "B" → "C" → "D" → "Guest" ...
In order of (1), one of these segments is turned on and off.

On the other hand, every time the “▼” cursor button is pressed, the CPU 53 turns counterclockwise (“guest” → “D” →
"C" → "B" → "A" → "Guest" ...)
One of the segments is turned on and off. Therefore, if the subject presses the confirmation button of the setting button 24 when the personal setting number assigned to the subject is blinking, the CPU 53 will display the personal information displayed when the confirmation button is pressed. The setting number (or “guest”) is specified as a personal setting number of the subject.

At S309, CPU 53 determines whether or not to call up the personal data and the measurement data. That is, C
The PU 53 waits for the call button 28 to be pressed until a predetermined time has elapsed since the push of the confirm button. If the call button 28 has not been pressed (S309; No), the process proceeds to S310. The process proceeds to S31;
Proceed to 5.

In step S310, the CPU 53 waits for the body fat measurement button 25 to be pressed until a predetermined time has elapsed from the end of the processing in step S309.
If (S310; No), the process returns to S303; if pressed (S310; Yes), the process proceeds to S311.

In S311, the CPU 311 performs the above-described weight / body fat measurement processing (see FIGS. 4 and 5). As a result, each measurement value is stored in the measurement value storage area (see FIG. 19) of the measurement data storage area corresponding to the personal setting number.

Thereafter, the CPU 53 determines whether or not the recording button 26 has been pressed until a predetermined time has elapsed since the end of the measurement of body fat (S312).
If (S312; No), the process returns to S303; if pressed (S312; Yes), the process proceeds to S313.

In S313, the CPU 53 reads the average value held at the address of the current day in the average value storage area for each measured value, and accumulates the current number of recordings, thereby obtaining the current recording integrated value WSUM ( Calculate the sum of the measured values so far on the current day). Subsequently, the CPU 53
Calculates the total sum of the measured values on the current day by adding the latest measured value to the recorded integrated value WSUM. Further, the CPU 53 adds 1 to the current number of recordings.

Subsequently, the CPU 53 sets the recording integrated value WSU
M is divided by the number of recording times to obtain the latest average value of the current day, and this average value is written to the address corresponding to the current date in the average value storage area, and then the process returns to S303.

As described above, every time the weight or body fat is measured, the average value on the measurement day (current day) is obtained and stored in the address corresponding to the current day in the average value storage area. In addition, instead of the recorded integrated value WSUM, a total sum of measured values of the current day may be held.

In the processing after S315, processing is performed to call out the average value of the measurement data for X days before the current date and for M days before and after the current day. Display 20 according to the present embodiment
Means “7 days before”, “14 days before”, “1 month (30 days)
It is possible to call up the average value of the measurement data of each day of “day) before”, “2 months (60 days) before”, “3 months (90 days) before” and the days before and after each day.

Here, with respect to “7 days before” and “14 days before”, the average value of the average values of the day and the one day before and after the day is obtained. In contrast, "one month ago", "two months ago", "3
For "months ago", the average value of the average values for each of the 30 days before, 60 days before, and 90 days before and 3 days before and after each day is obtained.

That is, in S315, the CPU 53 first sets a variable X indicating the number of days before the current date to “7” in order to calculate and display the average value of “7 days before (X = 7)”. , The variable M indicating each day before and after the day of the variable X is set to “1”.

Subsequently, as shown in FIG. 21, the CPU 53 accesses the average value storage area of the measurement data storage area corresponding to the personal setting number in the memory 54 (S316). The data integrated value RSUM, the data number counter CNT, and the loop counter in the work area are each cleared (S317).

Next, the CPU 53 obtains the reference start address ADDR in the average value storage area by using the expression “ADDR = address of current date = 0− (X−M)” (S3).
18). For example, when X is “7” and M is “1”, the reference start address ADDR is an address six addresses before the address of the current date.

Next, the CPU 53 sets the data DA stored at the address of the average value storage area corresponding to the value of ADDR.
T is read into the work area (S319), and it is determined whether or not the data DAT includes an average value (S320). At this time, when the average value is not included (S320; Yes)
In, the process proceeds to S322, and when the average value is included (S320; No), the process proceeds to S321.

At S321, the CPU 53 determines whether the current RS
The DAT (average value) is added to the value of UM, and the current CNT is incremented by one. Subsequently, the CPU 53
Is obtained by incrementing the value of the loop counter by 1 (S
322), the value of the loop counter becomes a predetermined value “M + M + 1”
(Here, M = 1) is determined (S32).
3) If so, the process proceeds to S324; otherwise, the process returns to S319. And S
Until the determination of “Yes” is made in H.323, S319
To S323 are repeatedly performed. by this,
The value of RSUM is the accumulated value of each average value 6 to 8 days before the current date, and the process proceeds to S324.

In S324, the CPU 53 sets “RSUM
By performing the operation of {CNT}, the average value of X days before and before and after each M days is obtained, and this value is displayed on the LCD 21 as the average value of “7 days before”, and the process proceeds to S325.

In S325, the CPU 53 presses down the power button 23 after S324 ends (S32
7; Yes), it is determined whether or not the subject has changed X by operating the setting button 24. That is, the measurement subject displays the average value of "7 days ago" by the processing of S309, S315 to S324, and then sets the setting button 2
By the operation of 4, any one of “14 days ago”, “1 month ago”, “2 months ago”, and “3 months ago” can be selected.

For this reason, the CPU 53 determines whether or not a date relating to another variable X has been selected, and if so, changes the value of the variable X to a value according to the selection of the subject. At the same time, the value of the variable M is changed to a value corresponding to the value of the variable X, and the process returns to S316. As a result, the subject measures the average value of each of “14 days ago”, “1 month ago”, “2 months ago”, and “3 months ago” and the days before and after that, on the LCD 2.
1 can be displayed. In S327, if the CPU 53 determines that the power button 23 has been pressed, the CPU 53 turns off the display on the LCD 21, and then returns the processing to S303 in FIG.

As described above, the CPU 53 sets “7
When recalling past measurement data (weight value, body fat mass, body fat percentage) stored in the measurement data storage area such as “before”, “one month ago”, “three months ago”, the selected day (variable X The average value of the average value of the day) and the average value of each day before and after the average value is calculated and displayed on the LCD 21. As described above, only the average value for each day is recorded in the average value storage area, and the measured value is not recorded. Therefore, the capacity of the memory 54 can be reduced.

The CPU 53 has a calendar IC function for associating the past measurement data stored in the measurement data storage area with the measurement date, and 24 hours have passed since the battery was set. The date is managed by incrementing the date counter by one every time, and the date and the measured data (the average value) are stored in the average value storage area in association with each other.
(See FIG. 19). That is, the measurement data is recorded in the memory 54 together with the counter value of the date counter.

With such a configuration, the configuration for setting the actual date and time on the display 20 can be omitted, so that the configuration of the display 20 can be simplified. However, the date on the display 20 does not match the actual date and time, but the weight value and the value relating to body fat are not significantly affected by the fact that the date does not match the actual date.

In the display 20 according to the present embodiment,
By calling up the average value after measuring the weight and body fat, the past average value and the current measurement value can be displayed on the LCD 21 for comparison. In addition, by repeating the processing of S316 to S324, it is possible to compare and display past average values. As a result, the subject can recognize the changes in his or her weight and body fat.

<Modification 1> FIG. 22 (a) is a front view of a display 20a which is a modification of Embodiment 1, and FIG. 21 (b)
Is a rear view of the display 20a shown in FIG.
FIG. 22C is a left side view of the display 20a shown in FIG.

In this embodiment, the light receiving window 33 is provided from the front to the back of the display 20, and two infrared sensors 51, 51 are provided inside the light receiving window 33. Instead, as shown in FIG. 22, the light receiving window 33a is provided only on the front surface of the display 20a or from the front to the bottom surface.
Only one infrared sensor 51 may be provided inside the camera. Even in this case, if the display 20a is arranged in the above-described radiation range, the infrared signal from the main body 10 can be satisfactorily received.

<Modification 2> FIG. 23 (a) is a perspective view showing the front (surface) of a display 20b which is a modification of Embodiment 1, and FIG. 23 (b) is a perspective view showing the display 20b. Display 20b shown in FIG.
FIG. 4 is a perspective view showing a back surface (back surface) of FIG.

In the present embodiment, the display 20 is formed in a flat plate having a thickness. Alternatively, the display 20 may be formed in a thin card shape like the display 20b shown in FIG. good. In this case, as shown in FIG.
0, 32 may be provided on the back surface of the display 20b. In this case, if the user holds the display 20b so as to sandwich each of the electrodes 29 to 32 with his / her finger, when the weight is measured while holding the display 20b, the tared value is displayed on the LCD 21a as a display value. .

As described above, if the electrodes of the display device according to the present invention are arranged at positions where the subject easily comes into contact when the subject takes the body fat measurement posture, the front surface (front surface) and the back surface (back surface) of the display device are provided. ), A flat surface, a bottom surface, a left side surface, or a right side surface, or may be provided over a plurality of surfaces, such as the indicator 20 shown in FIG.

[Embodiment 2] Next, Embodiment 2 of the present invention will be described.
Will be described. The second embodiment has the same configuration as the first embodiment. Therefore, the common components are denoted by the same reference numerals, the description thereof will be omitted, and different configurations will be described.

FIG. 24A is a front view of a display 60 of the weight scale according to Embodiment 2 of the present invention, and FIG. 24B is a rear view of the display 60 shown in FIG. FIG. 24
FIG. 24C is a left side view of the display 60 shown in FIG. FIG. 25 is a circuit configuration diagram of the weight scale according to the second embodiment.

As shown in FIG. 24, in the second embodiment, the four electrodes 2 for measuring the bioimpedance in the first embodiment are used.
Instead of 9 to 32, an electrode 61 for the left hand is provided from the front of the display 60 to the left side, and an electrode 62 for the right hand is provided from the front to the right side of the display 60. These electrodes 61 and 62 serve as current-carrying electrodes and potential difference measuring electrodes.

That is, as shown in FIG. 25, a high-frequency current is applied between the electrode 61 and the electrode 62 by the constant current generating circuit 56, and the potential difference between the electrode 61 and the electrode 62 is It is designed to be detected and amplified.

Except for the above points, the weight scale according to Embodiment 2
The configuration of the (main body, display) is almost the same as that of the first embodiment. The processing by each of the CPUs 44 and 53 in the second embodiment is the same as the processing shown in FIGS. Further, the method of using the weight scale according to the second embodiment is substantially the same as that of the first embodiment, and substantially the same effects as those of the first embodiment can be obtained.

The display 60 according to the second embodiment is
As shown in FIGS. 26A to 26C, it is possible to transform the display into a display 60a having a light receiving window 33a provided only from the front of the display or from the front to the bottom.
As shown in FIGS. 27 (a) and 27 (b), it is possible to transform into a display 60b having a card shape.

[Embodiment 3] Next, Embodiment 3 of the present invention.
Will be described. Since the third embodiment has the same configuration as the first embodiment, the same components are denoted by the same reference numerals, and description thereof will be omitted, and different configurations will be described.

The main body 10 of the weight scale according to the third embodiment has the same configuration as the first embodiment, and the display 70 has the same external configuration as the display 20 according to the first embodiment, as shown in FIG. I have.

FIG. 28 is a circuit diagram of the weight scale according to the third embodiment. As shown in FIG. 28, the main body 10 has the same circuit configuration as in the first embodiment. On the other hand, the display 70 differs from the first embodiment in the following points.

That is, a constant current generating circuit 71 for supplying a high-frequency current between the electrode 29 and the electrode 30 is provided, and the potential difference between the electrodes 29 and 30 caused by the current supplied by the constant current generating circuit 71 is reduced. The signal is detected and amplified by the amplifier circuit 72. Further, a constant current generating circuit 73 for supplying a high-frequency current between the electrode 31 and the electrode 32 is provided, and a potential difference between the electrodes 31 and 32 caused by the supply of the current by the constant current generating circuit 73 is determined by an amplifying circuit 72. Is detected and amplified.
The output terminals of the amplifier circuits 57, 72, and 74 are connected to the switching terminals of the changeover switch 75 at the measurement site.
One of the outputs 2, 74 is input to the A / D conversion circuit 58.

Further, each of the constant current generating circuits 56, 71, 73
Is connected to the CPU 53, and the CPU 53 executes a control program different from that of the first embodiment held in the memory 54, so that each of the constant current generation circuits 56, 71,
73 is controlled.

FIGS. 29 and 30 show the CPs shown in FIG.
It is a flowchart which shows the process by U53. Since the CPU 44 of the main body 10 according to the third embodiment operates according to the flowchart shown in FIG. 4, the description is omitted, and only the processing by the CPU 53 of the display 70 will be described.

[0180] As shown in FIG.
The processing from the insertion of 5 to the reception of the weight measurement end signal (the processing of S101 to S106) is the same as the processing of S001 to S006 in the first embodiment.

When the processing in S106 ends, the CPU 53
Inputs a control signal (start signal) to the constant current generation circuit 71 and switches the changeover switch 75 to a state in which the output terminal of the amplifier circuit 72 and the input terminal of the A / D conversion circuit 58 are connected (S107). .

As a result, the constant current generating circuit 71 causes a high-frequency current to flow between the electrode 29 and the electrode 30, and the potential difference between the electrode 29 and the electrode 30 at this time is detected and amplified by the amplifying circuit 72. Via the / D conversion circuit 58
It is input to U53.

Then, the CPU 53 sets the A / D conversion circuit 5
An impedance value is calculated from the potential difference input from Step 8 and it is determined whether or not this impedance value is equal to or greater than 1500 ohms (S108 in FIG. 30: left hand impedance measurement processing).

At this time, if the impedance value is equal to or greater than 1500 ohms, it is determined that the left hand is not in contact with each of the electrodes 29 and 30, that is, the subject is not holding the display 70 with the left hand. Proceeds to S109. On the other hand, if the impedance value is less than 1500 ohms, the process proceeds to step S112, assuming that the left hand is in contact with each of the electrodes 29 and 30, that is, the subject is holding the display 70 with the left hand. Proceed to.

When the process has proceeded to S109, the CPU 53 stops the operation by inputting a control signal (stop signal) to the constant current generating circuit 71, and then stops the operation.
A control signal (start signal) is input to the A / D conversion circuit 58 and the switch 75 is connected to the output terminal of the amplification circuit 74.
(S11)
0).

As a result, the constant current generating circuit 73 causes a high-frequency current to flow between the electrode 31 and the electrode 32, and the potential difference between the electrode 31 and the electrode 32 at this time is detected and amplified by the amplifying circuit 74. Via the / D conversion circuit 58
It is input to U53.

Then, the CPU 53 sets the A / D conversion circuit 5
An impedance value is calculated from the potential difference input from Step 8, and it is determined whether or not this impedance value is equal to or greater than 1500 ohms (S111: right hand impedance measurement processing).

At this time, if the impedance value is 1500 ohms or more, the right hand is not in contact with each of the electrodes 31 and 32, that is, the subject does not hold the display 70 (the display 70 is (It is placed on the top or fixed to the wall), and the process proceeds to S114. On the other hand, when the impedance value is less than 1500 ohms, it is assumed that the right hand is in contact with each of the electrodes 30 and 31, that is, the subject is holding the display 70 with the right hand.
The process proceeds to S112.

When the process has proceeded to S112, the CPU 53 sets a value obtained by subtracting the weight of the display unit 70 from the determined value of the weight as the display value, as in the first embodiment.
The characters "weight subtraction" are displayed on the LCD 21 and the display value is blinked on the LCD (S113). Thus, the tared weight value is displayed on the LCD 21 (see FIG. 11). Thereafter, the CPU 53 advances the processing to S116.

On the other hand, the CPU 53 executes the processing in S11
4, the control signal is sent to the constant current generation circuit 73.
(Stop signal), the operation is stopped, and the determined value of the weight is displayed as a display value on the LCD 21 by blinking (S1).
15). At this time, the character "weight subtraction" is not displayed on the LCD 21. Thereafter, the process proceeds to S116.

The CPU 53 executes the processing after S116 (S1
16 to S125), the value related to the body fat of the subject
(Body fat mass, body fat percentage) and display the measurement result on LCD
21. The processing in S116 to S125 is almost the same as the processing in the first embodiment (S011 to S018: see FIG. 6), and thus the description is omitted.

However, in the third embodiment, the CPU 53
At 118, a control signal (start signal) is input to the constant current generating circuit 73, and the changeover switch 75 is switched to a state where the output terminal of the amplifier circuit 74 and the input terminal of the A / D conversion circuit 58 are connected. Is different from the first embodiment in that a control signal (stop signal) is input to the constant current generation circuit 73.

According to the weight scale according to the third embodiment, unlike the first embodiment, as shown in FIG. 31, if the subject holds the display 70 with the left hand or the right hand when measuring the weight,
In S108 or S111, it is determined that the display 70 is held by the subject, and the weight of the display 70 is tared. Therefore, the subject does not need to hold the display with both hands when measuring the weight.

In the first to third embodiments, the display value is determined (tare) by the display, but the display value may be determined by the main body. For example, the main body and the display are configured to transmit and receive data in both directions, and if it is determined whether or not the display is held by the subject, the determination result is displayed on the display. Is transmitted to the main unit, and the main unit determines the display value based on the judgment result.
(Tare), and then the display value may be transmitted from the main body to the display and displayed on the LCD (display unit).

In the first to third embodiments, the threshold for determining whether or not the user has the display 20 is set to 1500 ohms. However, when the palm does not touch one of the two electrodes whose impedance is to be measured. In this case, since the electrodes are open, the impedance at that time becomes almost infinite. Therefore, the impedance value as the threshold can take any value as long as it is infinite or more.

[Embodiment 4] In the first to third embodiments, the weighing machine including the main body and the display device, and the display device has the function of a body fat scale has been described. However, as shown in FIG. Is composed of a main body 10, a display 20, and an electrode portion (regardless of two electrodes or four electrodes) 91, and when measuring a value related to body fat, the weight value is transferred from the main body 10 to the display 90. The transmitted electric potential difference between the electric potential difference detecting electrodes
Is transmitted to the display unit 90, the weight of the electrode unit 91 is tared from the weight value received from the main body 10 on the display unit 90, the bioimpedance is calculated from the potential difference received from the electrode unit 91, and the tared weight is calculated. A configuration may be used in which a value related to body fat is calculated using the value and the calculated bioimpedance value.

In the example shown in FIG. 32, the biometric impedance is calculated from the potential difference between the potential difference detecting electrodes in the electrode section 91, and the calculated bioimpedance is transmitted from the electrode section 91 to the display 90. good.
Further, in the example shown in FIG. 30, a configuration in which the weight value is tared by the main body 10 may be adopted.

[Embodiment 5] Next, Embodiment 5 of the present invention will be described.
Will be described. The weight scale according to the fifth embodiment differs from the weight scales according to the first to third embodiments in that only the weight of the subject is measured and displayed. However, since the fifth embodiment has the same configuration as the first embodiment, the same components are denoted by the same reference numerals, and description thereof will be omitted, and different configurations will be described.

The main body has the same external configuration as the main body 10 in the first embodiment. FIG. 33 is a front view of a display 80 of the weight scale according to the fifth embodiment. As shown in FIG. 33, the display 80 is formed in a front rectangular shape, and the LCD 21 and the LCD 21 are located at substantially the same positions as the display 20 in the first embodiment.
An operation button group 22 is provided.

Switches (or buttons) 81 to 81 on both sides of the LCD 21 and the operation button group 22 for causing the CPU 53 (see FIG. 34) of the display 80 to recognize that the subject is holding the display 80. 84 (corresponding to holding teaching means) is provided.

FIG. 34 is a circuit diagram of a weight scale according to the fifth embodiment. As shown in FIG. 34, the main body 10 has the same circuit configuration as the first embodiment. Each of the switches 81 to 84 shown in FIG. 33 is electrically connected to the CPU 53. When each of the switches 81 to 84 is turned on,
A signal indicating that the subject is holding the display 80
(Display holding signal) is input to the CPU 53.

The electrical connection between the switches 81 to 84 and the CPU 53 is not limited as long as the CPU 53 can recognize that at least one of the switches 81 to 84 is turned on.

[0203] The memory 54 holds a control program for executing processing different from the processing described in the first to third embodiments. The CPU 53 executes the control program stored in the memory 54 to execute the operation button group 22, the infrared receiving circuit 52, and the switches 8
The LCD 21 is controlled according to signals input from 1 to 82.

FIG. 35 is a diagram showing the C of the display 80 shown in FIG.
5 is a flowchart illustrating a process performed by a PU 53. FIG.
5, the processing of the CPU 53 is the same as the processing of the CPU 53 in the first embodiment except that the processing of S207 corresponding to S007 is different and there is no processing of S011 to S017 (see FIGS. 5 and 6).

That is, the CPU 53 determines in S207
It is determined whether at least one of the switches 81 to 84 has been pressed by the time the processing in S206 is completed. That is, CPU
53 determines whether or not a holding signal is being input from at least one of the switches 81 to 84.

At this time, the CPU 53 sets the switches 81 to
When it is determined that none of the keys 84 is pressed (the holding signal is not input), the display 80 is not held by the person to be measured and is placed on a table or fixed to a wall. The determined value of the weight received from the main body 10 is set as a display value and displayed on the LCD 21 (S208).

On the other hand, if it is determined that at least one of the switches 81 to 84 has been pressed (a holding signal has been input), it is determined that the display 80 is being held by the subject and the The value obtained by subtracting the weight of the display 80 from the determined value of the weight received from is used as the display value (S209), and the display value is displayed on the LCD 21 together with the word "weight reduction" (S210: see FIG. 12). Thereby, the display 8
The weight value with the zero weight subtracted can be shown to the subject.

Note that, instead of the above configuration, CPU 53
At the end of 206, the subject is prompted through the LCD 21 to turn on any of the switches 81 to 84, and thereafter, it is determined whether or not any of the switches 81 to 84 is turned on until a predetermined time elapses. Thus, the configuration may be such that it is determined whether or not the display 80 is held by the person to be measured.

Further, when the switch is pressed once, the ON state is maintained until the switch is pressed again.
During this state, a configuration may be used in which tare is always performed.

In this embodiment, each of the switches 81 to 81
Although 84 is configured using a membrane switch, the mechanical configuration of each of the switches 81 to 84 does not matter. Also, the number of switches and their positions can be set as appropriate. Further, a configuration may be adopted in which it is determined whether or not the display is held by the subject by detecting physical quantities such as a contact resistance value, a dielectric constant, and a pressure.

[0211]

According to the present invention, an accurate weight measurement result is displayed on the display even when the subject measures the weight while holding the display on the scale with the display separated from the main body. Can be done.

[Brief description of the drawings]

FIG. 1 is an external configuration diagram of a main body of a weight scale according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of a display device of the weight scale according to the first embodiment of the present invention.

FIG. 3 is a circuit configuration diagram of the weight scale according to the first embodiment of the present invention;

FIG. 4 is a flowchart showing processing by the CPU of the main body shown in FIG. 3;

FIG. 5 is a flowchart showing processing by the CPU of the display shown in FIG. 3;

FIG. 6 is a flowchart showing processing by the CPU of the display shown in FIG. 3;

FIG. 7 is a diagram showing a state where weight is measured using the weight scale according to the first embodiment;

FIG. 8 is a diagram showing a state of measuring body fat using the weight scale according to the first embodiment.

FIG. 9 is a diagram showing a state in which weight is measured using the weight scale according to the first embodiment.

FIG. 10 is an explanatory diagram of display contents of the display unit shown in FIG. 2;

11 is a diagram showing an example of a screen display of the display shown in FIG. 2;

FIG. 12 is a diagram showing a screen display example of the display device shown in FIG. 2;

FIG. 13 is a diagram showing a screen display example of the display device shown in FIG. 2;

FIG. 14 is a partially cutaway view of the display shown in FIG. 2;

FIG. 15 is a view showing the display device shown in FIG.

FIG. 16 is an explanatory diagram of a radiation range of the infrared signal of the main body shown in FIG. 1;

FIG. 17 is an explanatory diagram of a radiation range of an infrared signal of the main body shown in FIG. 1;

18 is an explanatory diagram of a radiation range of an infrared signal of the main body shown in FIG.

FIG. 19 is an explanatory diagram of a measurement data storage area in the memory shown in FIG.

FIG. 20 is a flowchart showing processing by the CPU of the display shown in FIG. 3;

FIG. 21 is a flowchart showing processing by the CPU of the display shown in FIG. 3;

FIG. 22 is a diagram showing a modification of the weight scale according to the first embodiment.

FIG. 23 is a diagram showing a modification of the weight scale according to the first embodiment.

FIG. 24 is a configuration diagram of a display device of the weight scale according to the second embodiment of the present invention.

FIG. 25 is a circuit configuration diagram of a weight scale according to a second embodiment of the present invention.

FIG. 26 is a diagram showing a modification of the weight scale according to the second embodiment.

FIG. 27 is a diagram showing a modification of the weight scale according to the second embodiment.

FIG. 28 is a circuit configuration diagram of a weight scale according to Embodiment 3 of the present invention.

FIG. 29 is a flowchart showing processing by the CPU of the display shown in FIG. 27;

FIG. 30 is a flowchart showing processing by the CPU of the display shown in FIG. 27;

FIG. 31 is a diagram showing a state in which weight is measured using the weight scale according to the third embodiment.

FIG. 32 is an explanatory view of a weight scale according to Embodiment 4 of the present invention.

FIG. 33 is an explanatory diagram of a display of a weight scale according to a fifth embodiment of the present invention.

FIG. 34 is a circuit configuration diagram of a weight scale according to a fifth embodiment of the present invention.

FIG. 35 is a flowchart showing processing by the CPU of the display shown in FIG. 32;

FIG. 36 is an explanatory view of a conventional technique.

FIG. 37 is an explanatory view of a conventional technique.

[Explanation of symbols]

AX Vertical axis L Central axis 10 Main body 13 Power switch 14 Infrared light emitting diode (Infrared radiation source) 20, 20a, 20b, 60, 60a, 60b, 70, 80
Display 21 LCD 22 Operation button group 29 to 32, 61, 62 Electrode 33, 33a Light receiving window 41 Strain gauge sensor 42 Amplification circuit 43 A / D conversion circuit 44 CPU 45 Memory 51 Infrared sensor 52 Infrared reception circuit 53 CPU 54 Memory 56 , 71, 73 Constant current generation circuit 57, 72, 73 Amplification circuit 58 A / D conversion circuit 75 Switch

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Kiichiro Miyata 24, Yamanouchi Yamanoshitamachi, Ukyo-ku, Kyoto-shi, Kyoto Prefecture Inside of OMRON Life Science Research Institute, Inc. OMRON Life Science Research Inc.

Claims (11)

[Claims] 1. A main body, and a display separated from the main body and held by a subject, wherein the main body includes: a measuring table; A weight measuring unit that measures weight, and a transmitting unit that transmits the weight value measured by the weight measuring unit to the display unit in a non-contact manner, the display unit includes: a display unit; and a weight value from the transmitting unit. A receiving unit that receives the weight of the display from the weight value measured by the weight measuring unit when the subject is holding the display when the weight is measured by the weight measuring unit. A control unit for displaying the tared weight value as a display value on the display unit. 2. The control section displays the weight value measured by the weight measuring section when the subject does not hold the display when the weight is measured by the weight measuring section. The weight scale according to claim 1, wherein the weight is displayed on the display unit as a value. 3. The display further includes an electrode that makes contact with a part of the body when the subject measures the weight while holding the display, and the control unit includes: 2. The weight scale according to claim 1, wherein, when a part of the weight is in contact with the electrode, the tared weight value is displayed on the display unit as a display value. 3. 4. The display device further includes an impedance measuring unit for measuring a bio-impedance of the subject, wherein the electrode is a bio-impedance measuring electrode included in the impedance measuring unit. When the body weight is measured in a state in which a part of the body is in contact with the measurement electrode and the bioelectrical impedance is measured by the impedance measuring unit, the weight value and the tared weight value are measured. The weight scale according to claim 3, wherein a value according to the health management guideline is calculated using the obtained bioimpedance value, and the value according to the health care guideline is displayed on the display unit. 5. The measurement electrode includes a left-hand electrode and a right-hand electrode, and the control unit performs the tare operation when the subject touches the left-hand electrode and the right-hand electrode. The weight scale according to claim 4, wherein a weight value is displayed on the display unit as a display value. 6. The measurement electrode comprises a left-hand electrode comprising a current-carrying electrode and a potential difference measurement electrode, and a right-hand electrode comprising a current-carrying electrode and a potential difference measurement electrode. When a person touches the current-carrying electrode and the potential difference measuring electrode forming the left-hand electrode, or the current-carrying electrode and the potential difference measuring electrode forming the right-hand electrode, the tared weight value is used as the display value. The weight scale according to claim 4, wherein the weight scale is displayed on a display unit. 7. The control unit according to claim 1, wherein after the weight value is received by the receiving unit, the control unit determines whether a part of the body of the subject is in contact with the electrode. 3. The weight scale according to 3. 8. A main body, and a display separated from the main body and held by a subject, wherein the main body includes: a measuring table; A weight measuring unit that measures weight, and a transmitting unit that transmits the weight value measured by the weight measuring unit to the display unit in a non-contact manner, the display unit includes: a display unit; and a weight value from the transmitting unit. A receiving unit that receives the display, a holding teaching unit that detects that the subject is holding the display, and a case where it is detected that the subject is holding the display by the holding teaching unit. And a control unit for displaying on the display unit a weight value obtained by taring the weight of the display unit from the weight value measured by the weight measurement unit as a display value. 9. The weight scale according to claim 1, wherein the display has a weight that is approximately the minimum unit weight of a weight value measurable by the weight measuring unit or a multiple thereof. 10. The control unit, when displaying the tared weight value as a display value on the display unit, informs that the display value is the tared weight value. The weight scale according to claim 1 or 8, wherein 11. The main body has a front surface, the transmitting section includes an infrared radiation source for radiating data to be transmitted to the display as an infrared signal, and It is arranged on the front side of the main body from the mounting center position of each foot when placed on a table and at a position substantially equidistant from the position of each foot, and supports itself with respect to a vertical axis passing through itself. Has a radiation range of an infrared signal having an axis inclined to the front side of the main body as a central axis, the reception unit has an infrared sensor that detects an infrared signal emitted from the infrared radiation source, and the infrared sensor The weight scale according to claim 1, wherein the scale is provided below the display unit.