JP2000300532A - Body fat meter with small-sized body weight meter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a body fat meter which prevents inconvenience on measurement and easy production of errors on measurement accompanied with measuring living body impedance between both feet from occurring and is integrated with a body weight meter. SOLUTION: A body fat meter with a small-sized body weight meter is provided with a pair of electrodes 3 and 4 for measuring voltage for measuring living body impedance of a human body and a pair of electrodes 5 and 6 for forming an electric current path, an operating part 7 for inputting personal data of a subject and a displaying part 8 for displaying the personal data and the body fat rate obtd. in a main body 1. In addition, the main body 1 contains a small-sized body weight meter wherein a body weight measuring face 2 wherein the body wt. can be measured by a process where the subject foots thereon and its wt. reduction is attempted. In addition, the electrodes 3, 4, 5 and 6 are arranged so as to be brought into contact with hands.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a body fat scale for measuring a body fat percentage of a human body, and more particularly, to a body fat scale with a small scale which is formed integrally with a small scale.

[0002]

2. Description of the Related Art From the viewpoint of maintaining health, a body fat ratio, which is an index of body fat, has been attracting attention. An increase in body fat causes an adult disease or the like. Therefore, by measuring the body fat percentage and knowing the body fat, adult disease can be prevented. A body fat meter is known as a device for measuring the body fat percentage. As a conventional body fat scale, there is a body fat scale with a weight scale integrated with a weight scale as disclosed in Japanese Patent Publication No. 5-49050. A conventional body fat meter with a weight scale will be described with reference to FIG. FIG.
(A) shows a body fat scale 60 with a weight scale as an example.

The body fat meter 60 has electrodes 63, 64, 65 and 66 disposed on a weight measuring surface 62 on which a subject sits to measure weight as shown in FIG. 9 (b). Have been. The electrodes 63, 64, 65, and 66 are a current path forming electrode for forming a current path in the body of the subject and a voltage measuring electrode for measuring a voltage between two points on the current path. This is an electrode for measuring the bioimpedance of the subject via the electrode.

According to the body fat meter 60, the subject is placed barefoot on a designated position on the weight measurement surface 62, and the soles of both feet are brought into contact with the electrodes 63, 64, 65, 66. , The bioelectrical impedance between the ends of both feet can be measured, and at the same time, the weight can be measured.
Then, the body fat can be estimated based on the measured bioimpedance and body weight. According to the body fat meter 60, body weight and body fat can be measured by one device, which is convenient.

[0005]

However, in the conventional body fat scale with a weight scale as shown in FIG. 9, the bioimpedance cannot be measured when wearing a sock or the like.
You need to be barefoot on the weighing surface. Therefore, it is necessary to take off the footwear unless it is installed and used in a bathroom or the like, and it cannot always be used easily.

Further, in measuring the bioelectrical impedance, in order to minimize the measurement error caused by the contact between the thighs of both feet in a stable upright posture,
In addition to separating the feet to some extent, it is necessary to position the feet to be placed on the weight measurement surface in order to prevent a change in the portion of the sole that contacts the electrodes. And for positioning this foot,
For example, positioning means such as a footprint or a heel guide may be fixedly provided together with the electrodes.

Further, in the conventional body fat scale with a weight scale, as shown in FIG. 9A, an operation unit 67 used for inputting personal data and the like necessary for obtaining a body fat percentage. Also, a display unit 68 for displaying the personal data and the weight and body fat percentage is disposed on the distal end side so as to be substantially integral with the weight measurement surface 62. Therefore, in the state of standing with the foot on the weight measurement surface 62 as shown in FIG. 9B, there is a problem that the display is difficult to read because the subject's eyes are far from the display unit. . In particular, when the body fat meter with a weight scale is miniaturized, the display unit is also miniaturized, which may cause a problem that the display becomes more difficult to read.

On the other hand, as a conventional body fat scale with a weight scale,
In some cases, a support is provided at a portion forming a weight scale on which a weight measurement surface is provided, and an operation unit and a display unit are provided on the support. With such a configuration, the subject's eyes can be brought closer to the display unit, so that the problem of difficulty in reading the display can be solved. However, since it has a configuration in which the columns are disposed above the weight measurement surface, the device becomes large, requires a large installation space, and cannot be easily housed, and can be used easily on a daily basis. Not something.

Therefore, the present invention makes it easy to visually confirm the display unit while preventing the inconvenience and measurement error involved in measuring the bioelectrical impedance between both feet as in the conventional body fat meter described above. An object of the present invention is to provide a body fat scale integrated with a weight scale, which can be simplified without being scaled up and can be easily used on a daily basis.

[0010]

In order to solve the above problems, the present invention provides a pair of current path forming electrodes for forming a current path in a human body of a subject, and a potential difference between two points in the current path. Consists of a pair of voltage measurement electrodes for measuring, an electrode group for measuring the bioelectrical impedance of the subject, and an operation unit for inputting the personal data of the subject,
An arithmetic processing unit for calculating a body fat percentage based on the personal data and the bioelectrical impedance; a display unit on which the personal data and the body fat percentage are displayed; and Including a small weighing scale having a weighing surface capable of measurement provided on the surface, at least the weight of which is 1.5
a body fat meter with a small body scale, wherein an electrode for measuring the impedance is provided so that the subject can make contact by hand. (Claim 1).

According to the body fat meter with a small scale, the subject can measure the bioimpedance by bringing both hands into contact with the electrode group. Also,
Since the main body is lightweight, it is easy to support with both hands, and it is also possible to measure the bioimpedance through both hands while supporting the main body with both hands. Thereby, the bioimpedance can be measured through both hands, so that the measurement of the body fat can be performed simply and accurately without any trouble such as taking off the footwear.
Further, in order to accurately measure the body fat, there is no need to provide an extra member in the body fat meter.

Further, according to the body fat scale with the small scale, since the body fat scale can be easily supported and operated with both hands as described above, the distance between the subject's eyes and the display unit can be reduced. It is easy to visually confirm the display unit.

Further, all the electrodes included in the electrode group can be arranged so that the finger of the subject can be brought into contact with either the front surface or the back surface of the main body. ). Thus, the bioimpedance can be measured by bringing the finger into contact.

Further, the pair of voltage measuring electrodes are arranged so that any one finger of each hand of both hands of the subject can be brought into contact with either one of the front surface and the back surface of the main body. The pair of current path forming electrodes may be arranged so that a finger different from the one finger in each hand of both hands of the subject can be brought into contact with the other surface of the front surface or the back surface of the main body ( Claim 3).

[0015] Also, a portion of the main body on which the electrode group is disposed on the front surface and the back surface can be gripped by pressing the front surface and the back surface with at least two fingers including the thumb of each hand of both hands. By forming and pinching a part of the main body on which the electrode group is disposed with two fingers of each hand of the both hands, the finger can be brought into contact with the electrode group and the main body can be supported. (Claim 4). Thus, the bioelectrical impedance can be measured while supporting the main body by pinching the portion where the electrode group of the main body is disposed with the two fingers of each hand.

Each of the electrodes included in the electrode group may be provided on a portion other than the weight measurement surface. Then, a portion other than the weight measurement surface on which the electrode is provided may be a portion corresponding to a corner of the main body (claim 6).

[0017] Further, a grip portion formed on the left and right side surfaces of the main body so that the main body can be supported by both hands by gripping the palm with both hands is provided, and the electrode group is gripped by both hands. In such a state, two fingers of each hand of both hands can be arranged so as to be in contact with each other (claim 7). Thereby, while holding the main body by holding the holding portion with both hands, it is also possible to measure the bioimpedance by bringing two fingers of each hand of both hands into contact with the electrode group.

Further, the main body including the small scale may be formed so that only one foot of the subject is placed on the weight measuring surface to measure the weight (claim 8). In this case, the body fat scale with the small scale is made smaller, which is convenient in handling and the like.

Further, the main body including the small weighing scale can be further formed to 1 kg or less. As a result, the size of the main body can be further reduced,
By carrying a body fat scale with a small scale, it is possible to constantly measure the body fat percentage.

An electrode supporting portion is provided at the tip of the main body so that the front surface and the back surface can be gripped by pressing the front surface and the back surface with two fingers including at least the thumb of each hand of both hands. By arranging the electrode group on the left and right ends of the front surface and the back surface of the support portion, and by using two fingers of each hand of the both hands, by pinching a portion where the electrode group of the electrode support portion is provided, A finger can be brought into contact with the electrode group, and the body can be supported (claim 10).

Further, each of the pair of current path forming electrodes provided on the other surface of the front surface or the back surface is positioned substantially directly behind each of the pair of voltage measuring electrodes provided on the one surface. (Claim 1)
1). Accordingly, in measuring the bioelectrical impedance of the human body via such an electrode group, the following significance is obtained as compared with a conventional body fat meter with a weight scale.

That is, in the conventional body fat scale with a weight scale, the toes and heels of the right and left feet are brought into contact with the four electrodes provided on the weight measurement surface, so that the center of gravity of the body is obtained. Depending on the position or posture, the pressing force of the contact portion of the sole with respect to each electrode varies, and a constant contact is not always obtained. Therefore, it is difficult to perform reproducible and stable measurement of bioelectrical impedance. Further, the pressing pressure on each electrode is determined by the weight of the subject.

On the other hand, according to the present invention, the electrodes provided on one surface and the electrodes provided on the other surface are located at positions substantially in the back of each other, and the positions of the front surface and the back surface are opposite to each other. It is in. Then, when measuring the bioelectrical impedance, the electrodes located at the opposite positions are picked up with the fingers of both hands, so that the pressing pressures of the contact portions against the opposed electrodes can be made substantially equal. As a result, compared with the conventional body fat meter with a weight scale, the variation in the pressing pressure on the electrode can be reduced, and the stable measurement of the bioelectrical impedance can be performed. In addition, the pressing pressure applied to each electrode can be adjusted to an appropriate value corresponding to the contact condition.

The pair of voltage measuring electrodes are arranged so that any one finger of each hand of both hands of the subject can be brought into contact with one side surface of the main body to form the pair of current paths. An electrode is disposed on the other side of the main body so that a finger different from the one finger in each hand of both hands can be contacted, and each of the pair of current path forming electrodes is a It can be arranged at a position substantially directly behind each of them (claim 13).

Also in this case, the electrodes disposed on one side and the electrodes disposed on the other side are located at positions that are substantially directly behind each other, and the relative positions of the one side and the other side are different. Is in a position to Thereby, the variation of the pressing pressure on the electrode can be reduced, and the stable measurement of the bioelectrical impedance can be performed. Further, the pressing pressure applied to each electrode can be adjusted to an appropriate value corresponding to the contact condition.

Also, one voltage measuring electrode and one current path forming electrode of the electrode group are connected to one finger of one hand of the subject and another finger other than the one finger. Provided on one side of the main body so that they can be brought into contact with each other, another voltage measuring electrode and another current path forming electrode are connected to one finger and the other finger of the other hand of the subject. The body may be provided on another side surface of the main body so that the finger can be brought into contact with each other (claim 12).

With this, the two fingers of one hand are brought into contact with the two electrodes on one side of the main body,
Bioimpedance can be measured by bringing the two fingers of the other hand into contact with the two electrodes on the other side of the main body.

Further, in the body fat scale with a small scale according to the present invention, the display unit and the operation unit may be arranged on the back surface of the main body. According to this body fat meter, the display unit and the operation unit are provided on the back surface, so that only the user himself / herself can see the measurement results such as weight and body fat percentage displayed on the display unit without being known to others. It is possible to

In a body fat scale with a small weighing scale in which the display unit and the operation unit are arranged on the back surface of the main body, the electrode group is arranged on a side surface of the main body that makes a turn. One finger of the subject and one finger other than the one finger can be brought into contact with the voltage measurement electrode and one current path forming electrode, respectively, and the other voltage measurement electrodes An electrode and another current path forming electrode may be arranged so that one finger of the other hand of the subject and another finger other than the one finger can be brought into contact with each other (claim 15). .

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS.

First, a first embodiment of the present invention will be described. FIG. 1 is a perspective view of a body fat scale 10 with a small scale according to the first embodiment of the present invention. The body fat scale 10 with a small scale is a main body 1 including a small scale.
In addition, various members functioning as a body fat meter are integrally incorporated. The portion of the main body 1 as a weighing scale is constituted by a small weighing scale called a so-called mini health, and the main body 1 weighs 1.5 kg or less.

On the surface of the main body 1, a weight measuring surface 2 is formed. In addition, a load cell 11 not shown in FIG. 1 is provided inside the main body 1 so that the weight on the weight measurement surface 2 is detected. The weight of the subject can be measured by placing the subject on the weight measurement surface 2 with both feet.

An operation unit 7 and a display unit 8 are provided at the tip of the main body 1. By operating the operation unit 7, the operation unit 7 can input personal data of the subject necessary for obtaining the body fat percentage, and has many keys necessary for inputting the personal data. . The personal data includes height data, gender, age, and the like of the subject. Note that, among the personal data, the data measured by the main body 1 is used as the weight data of the subject.

The operation unit 7 is provided with a selection key for selecting an item of personal data, a numerical key for inputting numerical data, and the like. The operation unit 7 includes
An on / off (ON / OFF) switch for turning on / off the power to operate the body fat meter 10 and a measurement start switch for starting measurement of bioelectrical impedance are also provided.

The display section 8 displays various data input through the operation section 7, and displays the body fat percentage as a final measurement result as well as the weight measured by the main body 1. You.

An electrode 3 is disposed on the left end of the front end of the main body 1 and an electrode 4 is disposed on the right end of the front end of the main body 1. An electrode 5 is disposed at a position substantially directly behind the electrode 3 on the back surface side of the main body 1, and an electrode 6 is positioned substantially directly behind the electrode 4.
Are arranged.

These electrode groups are for measuring the bioelectrical impedance of the human body, and are disposed separately from the body weight measurement surface 2 in the main body 1. The electrodes 5 and 6 are a pair of current path forming electrodes for forming a current path in the human body of the subject, and the electrodes 3 and 4 are for measuring a potential difference between two points in the current path. Are a pair of electrodes for voltage measurement.

These electrode groups are connected to impedance measuring means (not shown) inside the main body 1 which is well known in a body fat meter. That is, the electrodes 5 and 6 are connected to a circuit part forming a constant current source that outputs a constant current, and the electrodes 3 and 4 are connected to a circuit part forming a voltmeter.

Further, the portion of the main body where such an electrode group is disposed is thinner than other portions such as the portion where the weight measuring surface 2 is formed, and as will be described later with reference to FIG. When picking this portion with two fingers in each hand, it is easy to pick.

Next, referring to FIG. 2, a block of signal processing in the body fat scale 10 according to the operation will be described. Various calculations for obtaining the body fat percentage are performed by the central processing unit (CPU) 14 and the storage device 15.
The storage device 15 stores personal data input through operation of function keys provided on the operation unit 7, the electrodes 3, 4,
The measured value of the bioimpedance obtained via 5, 6 is stored.

The storage device 15 has a load cell 11
The outputted weight data is also stored. That is, the weight data output from the load cell 11 is appropriately amplified by the amplifier 12 and processed as a digital signal by the A / D converter 13.

The various data and measured values stored in the storage device 15 are displayed on the display unit 8. The above data and measured values are stored in the central processing unit 14 or the storage device 15.
Input / output (I / O)
16 is performed. Further, the storage device 15 also stores various arithmetic expressions, coefficients, and the like necessary for obtaining a body fat percentage based on bioelectrical impedance and personal data.

Next, how to use the body fat scale with a small scale 10 will be described with reference to FIG. By operating the operation unit 7, personal data such as height and age are input. Further, the body fat meter 10 is placed on a floor or the like, and the body weight is measured on the weight measurement surface 2 with both feet. The body weight measured by the main body 1 is used as body weight data when calculating the body fat percentage.

Next, as shown in FIG.
, The bioimpedance can be measured. That is, as shown in FIG. 3, the left thumb is pressed against the electrode 3, the left index finger is pressed against the electrode 5, and the right thumb is pressed against the electrode 4. The right index finger is pressed against the electrode 6 so that the electrode 3
The main body 1 is supported by picking the portions where 4, 5, and 6 are arranged with both hands. The body fat percentage of the subject is obtained based on the bioimpedance measured in this way and the personal data including the weight data.

As in the body fat scale 10, the electrode 5 is disposed so as to be substantially directly behind the electrode 3, and the electrode 6 is connected to the electrode 4.
When it is arranged so that it is located at a position almost directly behind, when the two fingers of each hand of both hands are brought into contact with the electrodes,
There is a merit that it is easy to pick. Thereby, it is also possible to stably measure the bioelectrical impedance while stably supporting the main body 1. Also, with two fingers in each hand,
The electrodes 3 and 5 can be pressed almost equally, and the electrodes 4 and 6 can be pressed almost equally. Thus, the bioelectrical impedance can be measured more stably.

Next, a second embodiment of the present invention will be described. FIG. 4 is a perspective view of a body fat scale 20 with a small scale according to a second embodiment of the present invention. The body fat scale 20 includes a body 21 including a small scale and having a weight measurement surface 22 formed thereon, the voltage measurement electrodes 3 and 4 for impedance measurement, and a current path, similarly to the body fat scale 10. It includes forming electrodes 5 and 6, an operation unit 7, and a display unit 8.

The voltage measuring electrode 3 and the current path forming electrode 5 are arranged near the left end on the surface of the main body 21, and the voltage measuring electrode 4 and the current path forming electrode 6 are connected to the main body 2.
1 is disposed near the right end on the surface of the first surface. The blocks for signal processing of personal data and other measurement data input from the operation unit 7 in the body fat scale 20 are the same as the blocks of the body fat scale 10 shown in FIG.

The body fat meter 20 has grips 27 and 28 on the left and right sides of the main body 21. Then, as shown in FIG. 4, two fingers of the right hand are held on the electrodes 4, 6 while holding the holding portion 27 with the palm of the right hand.
, And holding the main body 21 in such a manner that the two fingers of the left hand are in contact with the electrodes 3 and 5 while holding the grip portion 28 with the palm of the left hand, whereby the bioimpedance can be measured.

Next, a third embodiment of the present invention will be described. FIG. 5 is a view showing a body fat scale 30 with a small scale according to a third embodiment of the present invention. FIG. 5A is a plan view of the body fat scale 30 viewed from above, and FIG.
(B) is the side view which looked at the body fat meter 30 from the side.

The body fat meter 30 has a structure in which an electrode support portion 38 for supporting an electrode is provided at the tip of a main body 31. The portion of the main body 31 as a weighing scale is constituted by an extremely small weighing scale called a so-called microhealth. In addition, the main body 31 includes the weight measurement surface 3.
2 is large enough to place only one foot. The body fat meter 30 has a weight of 1 kg or less, and can be carried and used by a subject.

In the body fat scale 30, the main body 31 is extremely small as compared with a general weight scale, but even if the main body 31 is small as described above, it is possible to measure the weight stably. For the purpose, a load cell described below can be provided as a load cell inside the main body 31. FIG.
FIG. 2 is a perspective view of a load cell 50 that can be used for the body fat meter 30.

The load cell 50 shown in FIG. 6 is formed by bending a single elastic plate material into a horizontal U shape, the upper surface of which is a load table 51 to which a load is applied from the weight measurement surface 32, and the lower surface of which is a fixed portion 52. is there. An L-shaped groove 53 and an inverted L-shaped groove 53 ′ are provided on the mounting table symmetrically. Also, two grooves 5
A central portion corresponding to the middle side of 3, 53 'is a strain generating portion 55,
A strain gauge 58 is attached to the back surface or the front surface. The four points near the outer four corners of the grooves 53 and 53 'are set as load points, and a notch 59 is provided at the center of the fixed part 52, and at a position almost directly below the load point near the outer four corners. The leg of the fixing part 52 is attached.

In the body fat meter 30 shown in FIG. 5, the electrode support portion 38 is provided with voltage measuring electrodes 3 and 4 at the left and right ends on the surface side. A current path forming electrode 5 is disposed on the back side of the electrode support 38 at a position substantially directly behind the voltage measurement electrode 3, and the voltage measurement electrode 4 is provided.
The current path forming electrode 6 is disposed at a position substantially directly behind. An operation unit 7 and a display unit 8 are provided on the surface of the electrode support unit 38.

The blocks for signal processing of personal data and other measurement data input from the operation unit 7 in the body fat scale 30 are the same as the blocks of the body fat scale 10 shown in FIG. is there.

Next, how to use the body fat scale 30 will be described with reference to FIG. By operating the operation unit 7, personal data such as height and age are input.
In addition, the body fat meter 30 is placed on a floor or the like, and the body weight is measured on the weight measurement surface 32 with one foot. The body weight measured by the main body 31 is used as body weight data when calculating the body fat percentage.

Next, as shown in FIG.
, The bioimpedance can be measured. That is, as shown in FIG. 7, the left thumb is brought into contact with the electrode 3 so as to be pressed, the left index finger is brought into contact with the electrode 5 so as to be pressed, and the right thumb is pressed into the electrode 4. Then, the right index finger is brought into contact with the electrode 6 so as to press it, and the electrode support 38
To support the main body 31 with both hands. The body fat percentage of the subject is obtained based on the bioimpedance measured in this way and the personal data including the weight data.

In the first to third embodiments described above, the four electrodes for measuring the bioelectrical impedance are arranged on the front and back surfaces of the body fat scale or on the surface of the body fat scale. Although an example has been described above, all of the electrodes may be provided on the back surface of the body fat scale. In addition, such electrodes may be provided on the left and right side surfaces of the body fat meter, and two fingers of each hand of both hands are brought into contact with each other so as to press the four electrodes, and the body impedance is measured while supporting the main body. Anything that can be performed is acceptable.

Next, a fourth embodiment of the present invention will be described. 8A and 8B are diagrams illustrating a body fat scale 40 with a small scale according to a fourth embodiment of the present invention. FIG. 8A is a plan view viewed from above, FIG. FIG.
(C) is a front view. FIG. 8D shows the body fat meter 4.
0 is a view of the back side of FIG.

A body weight measuring surface 42 for measuring body weight is provided on the surface of the main body 41 of the body fat meter 40. The portion of the main body 41 as a weighing scale is constituted by a very small weighing scale called a so-called microhealth, and the weight of the main body 41 is 1 kg or less. In measuring the weight, the main body 41 has such a size that only one foot can be placed on the weight measurement surface 42.

The four electrodes 3, 4, 5, and 6 for measuring the bioelectrical impedance are disposed on the side surface of the main body 41 circling. Then, for example, the left thumb is pressed against the electrode 3 and the index finger of the left hand is pressed against the electrode 5, and the right thumb is pressed against the electrode 4. , And the index finger of the right hand can be pressed against the electrode 6.

The operation unit 7 and the display unit 8 are
1 is provided on the back surface. As described above, when the operation unit 7 and the display unit 8 are provided on the back surface, the measurement result such as the weight and the body fat percentage displayed on the display unit 8 can be seen only by the user himself without being known to others. Can also be used.

[0062]

As described above, in the body fat scale with a small scale according to the present invention, the subject can measure the bioimpedance by bringing both hands into contact with the electrode group. This has the effect that the measurement of body fat can be carried out simply and accurately without the complexity of the method. Also, in order to accurately measure body fat,
There is no need to provide extra members for the body fat meter. Furthermore, since the main body is lightweight, it is easy to support it with both hands, and it is possible to measure the bioimpedance through both hands while supporting the main body with both hands.

[Brief description of the drawings]

FIG. 1 is a perspective view of a body fat scale with a small scale according to a first embodiment.

FIG. 2 is a block diagram relating to signal processing of a body fat scale with a small scale.

FIG. 3 is a diagram illustrating a state in which bioimpedance is measured while supporting a body fat meter.

FIG. 4 is a perspective view of a body fat scale with a small scale according to a second embodiment.

FIG. 5 (a) is a plan view of a body fat scale with a small scale according to a third embodiment. (B) It is a side view of the body fat scale with a small scale according to the third embodiment.

FIG. 6 is a perspective view illustrating an example of a load cell.

FIG. 7 is a diagram illustrating a state in which bioimpedance is measured while supporting a body fat meter.

FIG. 8A is a plan view of a body fat scale with a small scale according to a fourth embodiment. (B) It is a side view of the body fat scale with a small weighing scale which concerns on 4th Embodiment. (C) It is a front view of the body fat scale with a small weighing scale which concerns on 4th Embodiment. (D) It is a figure showing the back of the body fat scale with a small scale according to the fourth embodiment.

FIG. 9 is a diagram illustrating an example of a conventional body fat scale integrated into a weight scale.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Weight measuring surface 3, 4 Voltage measuring electrode 5, 6 Current path forming electrode 7 Operation part 8 Display part 10 Body fat meter with small scale (first embodiment) 11 Load cell 12 Amplifier 13 A / D conversion Reference Signs List 14 Central processing unit (CPU) 15 Storage device 16 Input / output device (I / O) 20 Body fat scale with small scale (second embodiment) 21 Main body 22 Weight measuring surface 27, 28 Gripping unit 30 With small scale Body fat scale (third embodiment) 31 Main body 32 Weight measuring surface 38 Electrode support 40 Body fat scale with small scale (fourth embodiment) 50 Load cell 51 Placement table 52 Fixed part 53, 53 'Groove 54 Load Point 55 Strain-flexing part 58 Strain gauge 59 Notch 60 Example of conventional body fat scale with weight scale

Claims (15)

[Claims] An object comprises: a pair of current path forming electrodes for forming a current path in a human body of a subject; and a pair of voltage measuring electrodes for measuring a potential difference between two points in the current path. An electrode group for measuring the examiner's bioimpedance, an operation unit for inputting the subject's personal data, and an arithmetic processing unit for calculating a body fat percentage based on the personal data and bioimpedance, A display unit on which the personal data and the body fat percentage are displayed, and a small scale having a weight measuring surface provided on a surface on which a subject can measure weight by putting his / her feet on the surface, at least the weight of which is reduced. A body having a body weight of 1.5 kg or less, wherein an electrode for measuring the impedance is provided so that the subject can contact with the hand by hand. fat . 2. The method according to claim 1, wherein all electrodes included in the electrode group are arranged so that a finger of a subject can be brought into contact with either the front surface or the back surface of the main body. The body fat scale with a small scale according to claim 1. 3. The pair of voltage measuring electrodes are arranged so that any one finger of each hand of both hands of the subject can be brought into contact with either one of the front surface and the back surface of the main body. The pair of current path forming electrodes are arranged so that a finger different from the one finger in each hand of both hands of the subject can be brought into contact with the other surface of the front surface or the back surface of the main body. The body fat scale with a small scale according to claim 1, characterized in that: 4. A main body portion on which the electrode group is disposed on the front surface and the back surface, so that the front surface and the back surface can be gripped by pressing at least two fingers including a thumb in each hand of both hands. The finger can be brought into contact with the electrode group by pinching a portion of the main body on which the electrode group is disposed by using two fingers of each hand of the both hands, and The body fat scale with a small scale according to claim 3, which can be supported. 5. The body fat meter with a small scale according to claim 4, wherein each electrode included in the electrode group is provided on a portion other than the weight measurement surface. 6. The body fat meter with a small weighing scale according to claim 5, wherein a portion other than the weight measurement surface on which the electrode is provided is a portion corresponding to a corner of the main body. 7. A left and right side surface of the main body is provided with a grip portion formed so as to be able to support the main body with both hands by gripping the palm with both hands. The body fat scale with a small scale according to claim 1, wherein the body fat scale with the small scale is arranged so that two fingers of each hand of both hands can be brought into contact with each other while being held by both hands. 8. The body according to claim 1, wherein the main body including the small weighing scale is formed so that only one foot of the subject is placed on the weight measuring surface to measure the weight. Body fat scale with small scale. 9. The body fat scale with a small scale according to claim 8, wherein a main body including the small scale is further formed to be 1 kg or less. 10. An electrode support portion formed at the tip of the main body so as to be able to be gripped by pressing the front and back surfaces with two fingers including at least the thumb of each hand of both hands. The electrode group is disposed on the left and right ends of the front and back surfaces of the electrode support, and two fingers of each hand of the two hands pinch a portion where the electrode group of the electrode support is disposed. The body fat scale with a small scale according to claim 8 or 9, wherein the finger can be brought into contact with the electrode group and the body can be supported. 11. A position where each of a pair of current path forming electrodes disposed on the other surface of the front surface or the rear surface is substantially directly behind each of the pair of voltage measuring electrodes disposed on the one surface. The body fat meter with a small body scale according to any one of claims 3, 4, 5, 6, 8, 9, and 10. 12. An electrode for voltage measurement and one electrode for forming a current path in the electrode group, the one finger of one hand of the subject and another finger other than the one finger. The other electrode for voltage measurement and the other electrode for forming a current path are provided on one side surface of the main body so that they can be brought into contact with each other. The body fat scale with a small body scale according to claim 1 or 7, wherein the body fat scale is provided on another side surface of the main body so that the finger can be brought into contact with other fingers. 13. The pair of voltage measuring electrodes are arranged so that any one finger of each hand of both hands of the subject can be brought into contact with one side surface of the main body, and the pair of current paths is formed. An electrode is provided so that a finger different from the one finger in each hand of both hands can be brought into contact with another side surface of the main body, and each of the pair of current path forming electrodes is used for the pair of voltage measurement. The body fat meter with a small scale according to claim 1, wherein the body fat scale is provided at a position substantially directly behind each of the electrodes. 14. The body fat meter with a small weighing scale according to claim 1, wherein the display unit and the operation unit are provided on a back surface of the main body. 15. The electrode group is disposed on a side surface of the main body, and one finger of one hand of a subject is provided on one electrode for voltage measurement and one electrode for forming a current path. And the other finger other than the one finger can be brought into contact with each other, and the other voltage measuring electrode and the other current path forming electrode can be brought into contact with one finger and the other finger of the other hand of the subject. The body fat scale with a small scale according to claim 14, wherein the body fat scale is arranged so as to be able to make contact with other fingers.