JP2001128954A - Fat rate measuring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fat rate measuring device capable of stably obtaining measurement results with good reproducibility by keeping constant the contact position between a palm and an electrode and the contact state and making the contact pressure constant in a fat rate measuring device for measuring the fat rate by using a bioimpedance method. SOLUTION: This fat rate measuring device has a right electrode part 23b and a left electrode part 23a formed on the device body for measuring the bioimpedance, a right current application electrode 3b, a left current application electrode 3a, a right voltage measuring electrode 5b, a left voltage measuring electrode 5a, an input key group 21 for inputting information such as data on personal stature, body weight, age, sex, and the like, and a fat rate computing function for computing the fat rate from the bioimpedance measurement value and the input information. The right electrode part 23b and the left electrode part 23a are formed by a convex surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a body fat measurement for measuring body fat percentage, body fat mass, body fat mass, and body water content by measuring the impedance of a measurement site of the human body. It concerns the device.

[0002]

2. Description of the Related Art FIG.
This will be described with reference to 2 and 13. This body fat percentage measurement device
It is a body fat percentage measurement device with a calorie calculation function. FIG.
1 is an external perspective view of a conventional body fat percentage measuring device.

When viewed from the front of the main body 101, the left side 103 has a left side current applying electrode 107a and a left side voltage measuring electrode 109a, and the right side 105 has a right side current applying electrode 107b and a right side voltage measuring electrode. An electrode 109b, a left side current applying electrode 107a, a right side current applying electrode 107b, a left side voltage measuring electrode 109a,
The right side voltage measuring electrode 109b is electrically connected to a circuit unit (not shown in FIG. 12) in the main body.

[0004] A power switch 117, physical characteristics data such as height, weight, age, and gender of the subject, and food / beverage items can be input or selected in the main body 101, and switching between a body fat meter function and a calorie meter function can be performed. Key group 115 that can be performed
And a switching key 141 for switching between a body fat meter mode and a calorie calculation mode, and a display unit 113 for displaying input data and calculation results.

FIG. 13 is a block diagram showing a circuit configuration in the main body 1. As shown in FIG.

The internal circuit of the conventional body fat percentage measuring apparatus with a calorie calculation function has a frequency f (about 10 kHz to about 100 kHz).
kHz), a high-frequency signal generating unit 121 that generates a constant-current high-frequency signal of several hundred μA with a sine wave, a left-side current applying electrode 107a that applies the generated current to a living body, and a right-side current applying electrode 107b. Left side voltage measuring electrode 109a, right side voltage measuring electrode 109b for measuring a potential difference caused by an applied current and bioimpedance
Differential amplifier 1 that receives a potential difference signal from left-side voltage measurement electrode 109a and right-side voltage measurement electrode 109b
23, a full-wave rectifier 125 and an integrating / smoothing circuit 127 for processing the sine wave signal from the differential amplifier 123 into an absolute value signal which is an analog signal, and an A / A for converting the analog signal into a digital signal. D converter 129 and ROM for storing body fat percentage measurement and calorie calculation program
ROM1 for storing 131, food name and calorie data
39, input from the A / D converter 129 and input key group 11
CPU 135 that takes in data such as height, weight, age, sex, etc. or calorie data of food from 5 and executes necessary calorie calculation and impedance measurement processing calculation;
RAM 133 in which a work area of CPU 135 is set, switch key 141 for switching between body fat measurement mode and calorie calculation mode, power switch 117, power supply battery 1
37 and the like.

When the body fat percentage is measured in the above-mentioned conventional apparatus, the left palm is used to apply the left side current application electrode 107a and the left side voltage measurement electrode 109a, and the right palm is used to use the right side current application electrode 107b. And the right side surface voltage measurement electrode 109b. Then, a sine wave signal having a frequency f and several hundred μA is output from the high-frequency signal generation unit 121 to the left side current application electrode 10.
7a and the right side current applying electrode 107b, the left side current applying electrode 107a, the palm of the left hand, the left side voltage measuring electrode 109a, the living body, the right side voltage measuring electrode 109
b, a current is passed between the right side current application electrode 107b, and a potential difference generated between the left side voltage measurement electrode 109a and the right side voltage measurement electrode 109b due to the applied current and bioimpedance is applied to the differential amplifier 123. In addition, a potential difference signal proportional to the impedance is obtained.

The obtained potential difference signal is converted into an absolute value signal by an absolute value circuit composed of a full-wave rectifier 125 and an integral smoothing circuit 127, and this signal is converted into a digital signal having a predetermined number of bits by an A / D converter 129. Convert to a signal.

The converted digital signal is input key group 1
The arithmetic processing is performed by the arithmetic processing CPU 135 together with the data such as height, weight, age, sex, etc.
The result as the body fat percentage is obtained and displayed on the display unit 113.

The procedure for calculating calories is as follows.
After the power switch is turned on, the measurement mode is selected, and the calorie mode is selected and executed using the switching key 141.
Then, when a food name is input from the input key group 115, the calorie data of the input food is converted into a calorie meter data R.
When the weight of the food is read from the OM 139, the calorie value of a single item is calculated by the CPU 135, and the total calorie value of a plurality of foods is also calculated.

[0011]

However, in the body fat percentage measuring device with the calorie calculation function of the prior art, the contact position between the electrode portion and the palm is not determined with good reproducibility, and when the contact with the palm is made, There is a problem that the resistance difference and the contact area are different from each other, and the impedance measurement value is not stable and the measurement result of the body fat percentage is not stable, when the user grips and touches the portion.

Therefore, the present invention provides a body fat percentage measuring device for measuring a body fat percentage or the like using a bioelectrical impedance method, by stabilizing a contact position and a contact state between a palm and an electrode and stabilizing a contact pressure. It is an object of the present invention to provide a body fat percentage measuring device capable of obtaining a stable and reproducible measurement result.

[0013]

In order to achieve the above-mentioned object, a right electrode portion and a left electrode portion formed on a main body for measuring bioelectrical impedance, a right current applying electrode, a left current applying electrode, and a right current applying electrode are formed. A voltage measuring electrode and a left voltage measuring electrode,
An input key group for inputting information such as height, weight, age, and gender data of an individual, and a body fat percentage measurement having a body fat percentage calculation function of calculating a body fat percentage from the bioelectrical impedance measurement value and the input information The device is characterized in that the right electrode portion and the left electrode portion are formed with convex curved surfaces.

The right current applying electrode and the right voltage measuring electrode are formed near the rear end of the right electrode portion, and the left current applying electrode and the left voltage measuring electrode are formed near the rear end of the left electrode portion. It is characterized by being formed.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a body fat percentage measuring apparatus according to the present invention will be described with reference to FIGS. 1, 2 and 3. FIG. The embodiment will be described using a body fat percentage measuring device with a calorie calculation function. The present embodiment is characterized in that the right electrode portion and the left electrode portion are formed with convex curved surfaces.

The structure of the body fat percentage measuring apparatus with a calorie calculation function of the present invention will be described with reference to the external perspective view of FIG.
The body fat percentage measuring device with a calorie calculation function comprises a main body 1
The left electrode portion 23a, the left current applying electrode 3a, and the left voltage measuring electrode 5a are on the left side when viewed from the front of the device, and the right electrode portion 23b, the right current applying electrode 3b, and the right voltage measuring electrode 5b are on the right side.
The left current application electrode 3a, the right current application electrode 3b, the left voltage measurement electrode 5a, and the right voltage measurement electrode 5b are provided in a circuit section (not shown in FIG. 1) in the main body. Is electrically connected to

In the main body 1, a power switch 7, a selection key 9 for switching between a body fat mode, a calorie mode, and an automatic determination mode, and personal information data such as height, weight, age, and sex of the subject and food are inputted. Alternatively, the upper operation key 11 and the lower operation key 13 for selection, the setting key 15 for determining personal information data and food selection, the measurement key 17 for starting measurement of body fat percentage, and the like, and display of input data and calculation results The display unit 19 is arranged.

The selection key 9, the upper operation key 11, the lower operation key 13, the setting key 15, and the measurement key 17 are collectively called an input key group 21.

Next, the shape of the electrode portion will be described in detail with reference to FIG. 2. FIG. 2A is a front view of the left electrode portion 23a, and the left electrode portion 23a has a horizontal length. It has a vertically long shape longer than the length, the outer periphery is formed by a smooth curved surface, and a positioning portion 25a is formed on the side surface of the main body 1 (not shown in FIG. 2).
Further, a left current application electrode 3a and a left voltage measurement electrode 5a
Is formed on the surface of the left electrode portion 23a near the rear end 27.

FIG. 2B is a side view, and the side surface is formed as a convex curved surface obtained by combining substantially arcuate curved surfaces.

As for the measurement posture, as shown in FIG. 3A and FIG. 3B which is a detailed view of the arm portion at that time, the user sits on a chair, stretches his back, and stretches both arms forward. Place the palm in contact with the electrode part and take a measurement posture, the wrist will be in a moderately stretched state, the palm part can be deformed with flexibility and fit to the electrode surface, with a small force and sufficient contact area and contact A force can be obtained, and an optimal close contact state can be easily generated.

Here, the contact state between the palm of the left hand and the left electrode portion 23a will be described with reference to FIG. First, FIG.
As shown in FIG. 4B, the belly of the left thumb is placed on the left positioning portion 25.
The left hand rests on the left current applying electrode 3a and the left voltage measuring electrode 5a when hitting the concave portion a, and the little finger is placed along the side opposite to the left positioning portion 25a, so that the thumb and the little finger make the left electrode. It is possible to hold the portion 23a with the portion 23a interposed therebetween, and it is stable. The tip of the index finger, the middle finger, and the ring finger can be positioned at the tip 29 of the left electrode 23a, and the wrist can be positioned at the rear end 27 of the left electrode 23a.

By positioning in this manner, the palm can be applied so as to wrap around the rear end 27 side half of the electrode portion, and the left current applying electrode 3a and the left voltage measuring electrode 5a are connected to the left electrode portion 23a. Since it is located close to the rear end 27 side, there is no fear of contact with the finger, and the left current applying electrode 3a and the left voltage measuring electrode 5a can make good contact with the palm.

Although the palm has delicate irregularities, it is more flexible than the back of the hand, fingertips, wrists, etc., so it can be deformed to fit the surface of the electrode when it comes into contact with the electrode, and it can be wide. Area contact is possible.

Although not shown, the right current applying electrode 3b and the right voltage measuring electrode 5b are also located close to the rear end 27 of the right electrode portion 23b. The electrode 3b and the right voltage measuring electrode 5b can make good contact with the palm.

As a result, in the present embodiment, the electrode portion can be stably held, the palm and the electrode portion can contact with a large area, and the contact force can be easily and sufficiently reduced with a small force. Therefore, the measured value of the bioimpedance between the palm of the right hand and the palm of the left hand can be stabilized, and it can be measured with high accuracy and reproducibility, so that accurate body fat percentage measurement data can be obtained. it can.

It should be noted that no current flows through the left current applying electrode 3a, the right current applying electrode 3b, the left voltage measuring electrode 5a, and the right voltage measuring electrode 5b except during the measurement of the body fat percentage. I have.

The circuit configuration of the body fat percentage measuring apparatus with a calorie calculation function of the present invention is the same as the conventional example described with reference to the block diagram of FIG.

Next, the operation procedure of this embodiment will be described. First, regarding the operation procedure of the body fat measurement mode, FIGS.
This will be described with reference to FIGS.

When the power switch 7 is turned on and the body fat percentage measurement screen is displayed, a calibration process is performed, and then personal information such as height, weight, age, and gender is input.

The input of the height is as shown in the flowchart of FIG. 6. By operating the upper operation key 11 or the lower operation key 13, the numerical value can be increased or decreased. By pressing the setting key 15, the height is determined and input. At this time, as shown in FIG.
On the display unit 19, a mark of "height cm" is lit, and a numerical value of the height is displayed. When the height is not input, the user can return to the initial screen display by pressing the selection key 9.

When the height input is completed, a weight input screen is displayed. The operation of inputting the weight is the same as the height input method.
Then, after the weight input, an age input and a gender input are performed. These can be input by the same operation as the height input method.

When the input of the personal information is completed, the process stands by until the measurement key is turned on. If the input value of the personal information is correct, the measurement key is turned on, and it is confirmed that the subject has correctly contacted the electrode portion and that an impedance of a predetermined value or more has been detected, and a message indicating that the measurement has been started is displayed on the display unit 19. .

When the measurement is started, a display such as "Please hold the electrode unit correctly and take the measurement posture" is displayed on the display unit 19 to pay attention to the measurement posture. Alternatively, a time interval is required until the subject takes the measurement posture correctly.

Then, it is confirmed whether or not the measured value of the impedance between both hands is stable in a normal range. If the measured value is not stable, the measurement is repeated until the measured value is stabilized. At this time, the time until the measured value stabilizes may be determined to be a fixed time, and if it takes longer, an error may be displayed as shown in FIG.

When the measured value is normal and stable, the measurement processing and the conversion calculation of the body fat are executed, the end of the measurement is displayed on the display unit 19, and the measurement result is thereafter displayed on the display unit 19.

As a display example of the measurement result, the body fat percentage result and the BMI are numerically displayed as shown in FIG.
The body fat percentage range is displayed as a bar on the upper side of 9, and the range to which the user belongs is indicated by a mark.

When the measurement is performed again thereafter, the measurement key 1
You can do this by pressing 7. When the measurement is completed, the user can return to the state after the power switch is turned on by pressing the selection key 9, and the function can be selected.

Next, an operation procedure when the calorie mode is selected will be described with reference to FIGS.

First, when the calorie mode is selected, FIG.
A life intensity input screen as shown in FIG.
The living intensity is 1 for those who are doing desk work, housework, or light work, and the living intensity is 1 for living, and those who do business, sales, and housewives who are raising children have a moderate living intensity for living. Women, athletic students, etc. have a slightly higher living intensity of living intensity 3, and agriculture, fishing, professional athletes, etc. have a higher living intensity and living intensity of 4. When the living intensity is input, the living intensity to be selected is changed by operating the upper operation key 11 or the lower operating key 13, and the living intensity is determined by pressing the setting key when the living intensity is reached.

When a living intensity is input, a food input state is set. Here, using the upper operation key 11 or the lower operation key 13, a search for the initials of the food is performed, and subsequently a search for the food name is performed.

When the above input is completed, the single item calorie value of the input food is displayed (FIG. 10 (b)), and the total calorie value of the food selected so far, that is, the total calorie intake value, and the personal information are displayed. The calculated standard calorie value required for one day is automatically calculated and displayed on the display unit 19 (FIG. 10C).

The standard calorie value is a standard daily calorie intake for maintaining the current weight, and is derived from the standard calorie value = variable × current weight. The variables used here are determined by age, gender, and living intensity.

Then, it is possible to select whether or not to store the total calorie intake value, and to store the total calorie intake value by pressing the setting key 15 after the total calorie intake value is displayed.

As a method of selecting food, not only a method of searching from the initials as in this embodiment, but also a table in which foods are classified and prepared, for example, "rice" May be selected from the "Japanese food" classification block, but a detailed description is omitted because it is not directly related to the present invention.

Next, the operation procedure of the automatic judgment mode will be described with reference to FIG.

On the mode selection screen, the upper operation key 11
Alternatively, when the automatic determination mode is selected by operating the lower operation key 13, an automatic determination screen for determining an advice suitable for the person based on the body fat percentage measurement result and the calculated calorie intake value is displayed (FIG. 11 ( a) and FIG. 11 (b)).

On the automatic determination screen, the body fat percentage result and the calorie intake value are displayed alternately, and further, a comment is displayed in the lower part of the display section. In the automatic determination function, it is necessary that the body fat percentage has been measured and the calorie value has been calculated.

Note that the display method used for these determinations is not limited to the above, and the effect is great even if the body fat percentage determination step and the total caloric intake value step are taken in detail and the determination according to each is given. can get. Further, the content displayed on the comment display section is not limited to the above, and may be displayed using a mark or a picture.

[0050]

As described above, according to the first aspect of the present invention, the right electrode portion and the left electrode portion formed on the main body for measuring the bioelectrical impedance, the right current applying electrode and the left A current application electrode, a right voltage measurement electrode, a left voltage measurement electrode, an input key group for inputting information such as height, weight, age, and gender data of an individual; and a body fat from the bioelectrical impedance measurement value and the input information. A body fat percentage measuring device having a body fat percentage calculating function of calculating a rate, wherein the right electrode part and the left electrode part are formed by a convex curved surface, so that reproducibility and stability are improved. A good body fat percentage measurement is possible.

According to a second aspect of the present invention, the right current applying electrode and the right voltage measuring electrode are formed near the rear end of the right electrode portion, and the left current applying electrode and the left voltage measuring electrode are formed near the rear end. Since the electrode is formed near the rear end of the left electrode portion, the body fat ratio can be measured with good reproducibility and stability.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a body fat percentage measuring device of the present invention.

FIG. 2 is a front view and a side view of the body fat percentage measuring device of the present invention.

FIG. 3 is a diagram showing a measurement posture at the time of measuring a body fat percentage in the body fat percentage measuring device of the present invention.

FIG. 4 is a view showing a positional relationship between a palm and an electrode unit in the body fat percentage measuring device of the present invention at the time of contact.

FIG. 5 is a flowchart illustrating a body fat mode in the body fat percentage measuring device of the present invention.

FIG. 6 is a flowchart illustrating a height input procedure in the body fat percentage measuring device of the present invention.

FIG. 7 is a diagram illustrating a height input display unit when personal information is input in the body fat measurement device of the present invention.

FIG. 8 shows an error display screen and a body fat percentage result display screen in the body fat percentage measurement device of the present invention.

FIG. 9 is a flowchart illustrating a calorie mode in the body fat percentage measuring device of the present invention.

FIG. 10 is a diagram illustrating a life intensity selection screen and a food calorie value display screen in the body fat percentage measuring device of the present invention.

FIG. 11 is a display screen in an automatic determination mode in the body fat percentage measuring device of the present invention.

FIG. 12 is an external perspective view of a conventional body fat percentage measuring device.

FIG. 13 is an internal circuit configuration diagram of a conventional body fat percentage measuring device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 3a Left current application electrode 3b Right current application electrode 5a Left voltage measurement electrode 5b Right voltage measurement electrode 7 Power switch 9 Select key 11 Up operation key 13 Lower operation key 15 Setting key 17 Measurement key 19 Display 21 Input key group 23a Left electrode part 23b Right electrode part 25a Left positioning part 25b Right positioning part 27 Rear end part 29 Front end part

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Minoru Koide 6-11-12 Honcho, Tanashi-shi, Tokyo F-term in Citizen Watch Co., Ltd. Tanashi Works (reference) 4C027 AA06 CC00 DD03 EE01 KK01 KK03 KK05

Claims (2)

[Claims] 1. A right electrode portion and a left electrode portion formed on a main body for measuring bioelectrical impedance, a right current applying electrode, a left current applying electrode, a right voltage measuring electrode, a left voltage measuring electrode, and an individual. Input key group for inputting information such as height, weight, age, and gender data, and a body fat percentage measuring device having a body fat percentage calculating function of calculating a body fat percentage from the bioelectrical impedance measurement value and the input information The body fat percentage measuring device, wherein the right electrode portion and the left electrode portion are formed by convex curved surfaces. 2. The right current application electrode and the right voltage measurement electrode are formed near the rear end of the right electrode portion, and the left current application electrode and the left voltage measurement electrode are formed at the rear end of the left electrode portion. The body fat percentage measuring device according to claim 1, wherein the body fat percentage measuring device is formed nearer.