JP2001145607A - Portable body fat measuring instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable body fat percentage measuring instrument capable of easily and speedily measuring a body fat percentage anytime. SOLUTION: This body fat measuring instrument consists of a case 1 and a pair of belts 16 and 17 engaged with the mutually opposed side parts of this case 1. Key input parts 51 to 54 are provided at the other both mutually-opposed side parts of the case 1. On the front surface side of the case 1, a display part 4 consisting of an LCD is arranged at a center part and a pair of electrodes 2 and 3 is arranged at a place closer to the belt 17. Concerning this pair of electrodes 2 and 3, one electrode 2 which is for high-frequency current output and the other electrode 3 which is for detecting voltage are arranged at a proper interval to be insulated from each other. Further, on the rear surface side of the case 1, a pair of electrodes 6 and 7 is arranged. Concerning this pair of electrodes 6 and 7, one electrode 6 which is for high-frequency current output and the other electrode 7 which is for detecting voltage are arranged at a proper interval to be insulated from each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a body fat measuring device, and more particularly, to a portable body fat measuring device for measuring body fat of a human body by a so-called four-terminal electrode method.

[0002]

2. Description of the Related Art Conventionally, as a portable body fat measuring device using a four-terminal electrode method, one disclosed in Japanese Utility Model Registration No. 3028986 is known. This portable body fat measuring device is composed of an apparatus main body and a pair of grips foldably attached to both sides of the apparatus main body, and each of the grips has two electrodes. Therefore, at the time of non-measurement, it is possible to reduce the size by folding the gripping portion and carry it in a pocket or the like. Further, at the time of measurement, the palm is brought into close contact with the electrode of the gripping part by unfolding and gripping the gripping part, so that body fat can be measured.

[0003]

However, in such a conventional portable body fat measuring device, when the device is measured, the device is taken out of a pocket or the like, the grips are deployed, and then the grips are removed. Must be grasped. Therefore, the operation at the time of measurement is complicated, and the measurement of the body fat percentage cannot be performed easily and quickly.

SUMMARY OF THE INVENTION The present invention has been made in view of such conventional problems, and provides a portable body fat percentage measuring device capable of easily, quickly and accurately measuring the body fat percentage at any time. It is intended to do so.

[0005]

According to the present invention, a pair of output electrodes for outputting a high-frequency current and a pair of detection electrodes for detecting a voltage are provided. And a loop passing through the human body formed by the pair of output electrodes is larger than a loop passing through the human body formed by the pair of detection electrodes. A body fat measuring device that contacts the skin of the human body to measure body fat based on a voltage detected from the detection electrode, the back surface of which is in contact with the arm of the body that can be worn on the arm of the human body On the side, one of the pair of output electrodes and one of the pair of detection electrodes are arranged, and the other of the pair of output electrodes and the other of the pair of detection electrodes are arranged on the surface side of the mounting body. Is characterized by placing Therefore, when the wearing body is worn on the arm, one of the output electrode and the detection electrode comes into contact with the arm. Therefore, if the other finger is brought into contact with the other output electrode and the detection electrode, the measurement of the body fat becomes possible, and the measurement of the body fat percentage can be performed easily and quickly as needed.

Further, in the invention according to claim 2, the mounting body is constituted by an apparatus main body, and a belt-like body which is engaged with both ends of the apparatus main body and can be wound around the arm of the human body, The electrode is arranged on the device body. Therefore, power to the electrodes can be supplied directly from the apparatus main body, and the circuit is simplified.

According to the third aspect of the present invention, the mounting body includes a main body of the apparatus, and a belt-like body fixed to both ends of the main body of the apparatus and capable of being wound around the arm of the human body. The electrodes are arranged on the strip. Therefore, when the band is wound around the arm, the electrode is in close contact with the skin of the arm, and measurement can be performed without error.

Further, in the invention according to claim 4, the mounting body includes a detecting means for detecting which one of the right and left arms of the human body is mounted, and the electrode is connected to the electrode based on a detection result of the detecting means. Control means for switching between the output electrode and the detection electrode is further provided. Therefore, even when the wearing body is worn on the left or right arm of the human body, the electrodes are switched between the output electrode and the detection electrode, so that the electrodes pass through the human body formed by the pair of output electrodes. The loop may be larger than a loop formed by a pair of detection electrodes and passing through a human body.
Therefore, even when the wearing body is worn on either the left or right arm, body fat can be accurately measured using the four-terminal electrode method.

According to a fifth aspect of the present invention, the detection means is a heart radio wave detection means for detecting a heart radio wave, and is attached to either the left or right arm of the human body based on the detected heart radio wave. Detect whether it was done. That is, the arm of the wearing body is detected by determining the polarity of the characteristic QRST waveform of the first lead of the electrocardiogram led from both the left and right arms, particularly the polarity of the R wave.

[0010] In the invention according to claim 6, the other of the pair of output electrodes and the other of the pair of detection electrodes are respectively arranged on the surface side of the mounting body, and the detection is performed. The means detects which of the left and right arms of the human body is worn based on which of the electrodes the human body has contacted. That is, at the time of measurement, the wearing body is worn on one arm, and the other finger is brought into contact with any one of the output electrodes and any one of the detection electrodes arranged two by two. At this time, if the finger contacts one of the output electrode and the detection electrode which is easily contacted with the finger of the right hand, for example, two of the output electrode and the detection electrode are arranged, If the finger contacts one output electrode and the detection electrode electrode which are attached to the left hand and are easily contacted by the finger of the left hand, it can be detected that the attachment is attached to the left hand.

Further, in the invention according to claim 7, the mounting body has a rotatable bezel on the front side, and the detecting means detects the human body based on a rotation direction of the bezel. It detects which of the left and right arms is worn. That is, upon measurement, the wearing body is worn on one arm and the bezel is rotated with the other hand. At this time, since there is a direction in which the bezel can be easily rotated by the other hand, by detecting the direction, it is possible to detect whether the arm on which the wearing body is worn is left or right.

[0012] In the invention according to claim 8, storage means for storing whether the subject wears the left or right arm on the subject in association with personal data of the subject.
Control means for switching the electrode between the output electrode and the detection electrode based on the contents stored in the storage means is further provided. Therefore, as described above, even when the wearing body is worn on either the left or right arm of the human body, the electrodes are formed by a pair of output electrodes by switching the electrodes between the output electrode and the detection electrode. The loop passing through the human body can be made larger than the loop passing through the human body formed by the pair of detection electrodes.

According to the ninth aspect of the present invention, a display unit for displaying a measurement result is further provided on the front side of the apparatus main body. Therefore, the measurement result can be visually recognized easily and quickly.

Further, in the invention according to claim 10,
The other output electrode and the detection electrode are arranged on the front side of the device main body, and a lid is provided to cover the surface of the device main body so as to be openable and closable. Therefore, during non-measurement, the electrode is covered with the lid to prevent contamination, and an error due to poor contact can be prevented before measurement.

[0015] Further, in the invention according to claim 11,
The lid is provided with display means for displaying the measurement result of the body fat. Therefore, by opening the lid at an arbitrary angle, the display means can be visually recognized at an easy-to-view angle.

Further, in the invention according to claim 12,
A first display unit for displaying the measurement result of the body fat is provided on one surface side of the lid that covers the surface of the device main body, and a second display unit for displaying time is provided on the other surface side. . Therefore, if the lid is closed at the time of non-measurement, it functions as a wristwatch.

Further, in the invention according to claim 13,
The display means includes a display unit for displaying a level of the measurement result of the body fat. Therefore, the evaluation of the measurement result can be indicated by the level display.

In the invention according to claim 14,
Control means for detecting the opening of the lid and starting the measurement is provided. Therefore, the measurement can be started smoothly while protecting the electrodes with the lid.

In the invention according to claim 15,
It comprises a pair of output electrodes for outputting a high-frequency current, and a pair of detection electrodes for detecting a voltage, and a loop passing through a human body formed by the pair of output electrodes is used for the pair of detection electrodes. A body for measuring body fat based on a voltage detected from the detection electrode by bringing the pair of output electrodes into contact with the skin of the human body so as to be larger than a loop formed by the human body electrode and passing through the human body. The fat measuring device includes a device main body, and a plurality of operating means provided in the device main body and having both a switch function of being pressed and turned on and a function as each of the electrodes. Therefore, by operating the respective operating means simultaneously to operate the switch, a contact state between the electrode and the human body required for measuring body fat is formed.

Further, in the invention according to claim 16,
The apparatus further includes a mounting means for mounting the apparatus main body on an arm, so that it is convenient to carry.

In the invention according to claim 17,
Control means for detecting the ON operation of the plurality of switches and starting the measurement is further provided. Therefore, by simultaneously operating the respective operating means so as to operate the switch, the contact state between the electrode and the human body required for measuring body fat is formed, and the measurement is started smoothly.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of the present invention. This body fat measuring device has the same external configuration as a wristwatch, and is locked to a case 1 and opposite sides of the case 1. And a pair of belts 16, 17. Key input sections 51, 52, 53, 54 are provided on other opposite sides of the case 1. On the front side of the case 1, as shown in FIG. 1A, a display unit 4 composed of an LCD is arranged at the center, and a pair of electrodes 2 and 3 are arranged near the belt 17.

The pair of electrodes 2 and 3 have one electrode 2 for outputting a high-frequency current and the other electrode 3 for detecting a voltage.
By being arranged at appropriate intervals, they are insulated from each other. As shown in FIG. 2B, a pair of electrodes 6 and 7 are provided on the back side of the case 1. The pair of electrodes 6 and 7 are insulated from each other by being arranged at appropriate intervals, with one electrode 6 for outputting a high-frequency current and the other electrode 7 for detecting a voltage.

As shown in the enlarged view of FIG. 2, the characters "thin", "normal", "light obesity", and "obesity" are printed on the display unit 4, and corresponding characters are printed. A segment 4a is provided. Further, the display unit 4 displays “FAT” and “BM
"I" is displayed. Although “FAT” is the body fat percentage (%), the display can be switched to the fat amount (kg) by detecting any one of the predetermined operations of the key input units 51, 52, 53, and 54 (FIG. 7 (a)). Also,
“BMI” is an index calculated by a BMI (Body Mass Index) which is widely known as a method for checking the degree of obesity, and is, for example, the weight / (height) ² of the subject stored in the RAM 8 in advance. Is displayed.

FIG. 3 is a block diagram showing a circuit configuration of the body fat measurement device according to the present embodiment, which is arranged in the case 1. As shown in FIG. In this block diagram, the oscillation circuit 1
5 and a V / I circuit are high-frequency current generation circuits (specifically, 15 is an oscillation circuit, and V / I circuit 14 is a circuit that generates a high-frequency current from the AC voltage oscillated by the oscillation circuit). The V / I circuit 14 is a high-frequency current output electrode 2,
6 is connected. The voltage detection electrodes 3 and 7 are:
A signal amplifier 11 including a filter, a traveling integrator 12, A /
It is connected to the CPU 10 via the D converter 13. C
The PU 10 includes the key input units 51 to 54 and the display unit 4.
Are connected, and the RAM 8 and the ROM 9 are connected. The CPU 10 controls the display of time information and the measurement of body fat by mode switching by executing a time information display process and a body fat measurement process described below in accordance with a program stored in the ROM 9. The RAM 8 is used as a work memory (time information register) of the CPU 10 and is also used as a memory for storing data such as height, weight, age, and gender of the subject input in advance by key operations.

In the present embodiment having the above configuration, the subject is worn on the left arm with the belts 16 and 17. As a result, the electrodes 6 and 7 on the back surface contact the skin of the left arm of the subject. Then, when performing body fat measurement, a predetermined key operation is performed, mode switching is performed to set a measurement mode, and then the right hand is brought into contact with the electrodes 2 and 3 on the front side, respectively. As a result, as shown in FIG. 3, the high-frequency current output electrodes 2 and 6, the voltage detection electrodes 3 and 7, and the human body of the person to be measured form a loop and conduct.

On the other hand, the CPU 10 operates according to the flowchart shown in FIG. 4 based on the program stored in the ROM 9, and waits until the setting of the measurement mode is detected (step S1). When the measurement mode is detected, the previous measurement data in the work area is initialized (Step S2). Next, data such as the height, weight, age, and sex of the user are sequentially read from the RAM 8 (step S3), and a BMI index is calculated based on the read weight and height (step S4).

Thereafter, the measurement is started, and the potential between the electrodes 3 and 7 for voltage detection is taken out (step S5). At this time, the presence or absence of a measurement error due to poor contact between the electrodes 2, 3, 6 and 7 is checked. It is detected (step S6). When a measurement error is detected, an error is displayed on the display unit 4 (step S9), and the error display is continued until a predetermined time has elapsed (step S10).

If no measurement error is detected, the body impedance is determined from the potential between the voltage detection electrodes 3 and 7 extracted in step S5, and based on the body impedance and the height and weight read in step S3. Then, the body fat percentage is calculated by performing a known calculation (step S7). Thereafter, the BMI calculated in step S4 and the body fat percentage calculated in step S7 are displayed on the display unit 4 (step S8).

At this time, according to the calculated body fat percentage,
The segment 4a corresponding to the order of "thin", "normal", "light obesity", and "obesity" is turned on. Therefore, as shown in FIG. 2, “FAT 23.5%” and “BMI 21” are displayed on the display unit 4 by the processing in step S8, and the calculated body fat percentage and BMI index are displayed. , The segments 4a are sequentially turned on. Therefore,
If this body fat measurement device is worn on the arm, the measurement mode is set and the other finger is brought into contact with the electrodes 2 and 3 on the front side, so that the measurement of the body fat percentage can be performed easily and quickly at any time. be able to. Further, by visually recognizing the printed character corresponding to the lit segment 4a, it is possible to recognize the level of the body fat percentage of the subject himself / herself. As described above, the ratio (%) of the fat mass to the human body can be displayed instead of the FAT by switching the display by operating the predetermined key.

FIG. 5 shows an example of the arrangement of the electrodes 2 and 3 arranged on the front side in the first embodiment of the present invention. That is, FIG. 2A shows an example in which the electrodes 2 and 3 are arranged on both sides of the display unit 4 in the case 1. (B) is an example in which it is arranged in the upper right corner and the lower left corner, and (c) is an example in which it is arranged in the upper left corner and the lower right corner. (D) is an example in which one of the electrodes 2 and 3 is disposed on the belt 16 and the belt 17, respectively. As shown in these modified examples, the electrodes 2 and 3 do not contact the arm when the body fat measurement device is worn on the arm by the belts 16 and 17 but can contact with the other finger. When the body fat measurement device is mounted on the left arm of the subject, the electrode may be at any position as long as the electrode 2 is located outside the electrode 3 with respect to the human body of the subject. However, when the electrodes 2 and 3 are arranged on the case 1 side, there is an advantage that current supply and voltage detection to the electrodes 2 and 3 become easy and the circuit is simplified.

FIG. 6 shows an example of the arrangement of the electrodes 6, 7 arranged on the rear surface side in the first embodiment of the present invention. That is, FIG. 3A shows an example in which the electrodes 6 and 7 are arranged in the lateral direction on the back surface of the case 1. (B)
Is an example arranged in a diagonal right direction, and (c) is an example arranged in a diagonal left direction. (D) is an example in which it is arranged on one belt 17, (e) is an example in which it is arranged on the other belt 16, and (f) is one in which one of the electrodes 6 and 7 is attached to the belt 16 and the belt 17, respectively. This is an example of arrangement. As shown in this modification, the electrodes 6 and 7 can contact the skin of the arm when the body fat measurement device is worn on the arm by the belts 16 and 17, and the electrodes 6 and 7 are applied to the left arm of the subject at the time of measurement. When the body fat measurement device is mounted, if the electrode 6 is located outside the electrode 7 with respect to the human body of the subject,
It may be at any position.

Of course, the arrangement examples shown in FIGS. 5A to 5D and the arrangement examples shown in FIGS. 6A to 6F can be appropriately combined and used.

In this embodiment, according to the calculated percentage of body fat and the BMI index, “thin”, “normal”
Although the segments 4a corresponding to "light obesity" and "obesity" are sequentially turned on, the segments 4a corresponding to any of "thin", "normal", "light obesity", and "obesity" may be turned on. For the display of these measurement results,
Character display using a dot matrix, animation display, and the like can be changed as appropriate.

(Second Embodiment) FIG. 7 shows a second embodiment of the present invention. As shown in FIG. 1A, in this body fat measurement device, a case 1 is a case body 1a.
And a lid 1b. As in the above embodiment, a pair of belts 16 and 17 are locked to the case main body 1a, key input sections 51, 52, 53 and 54 are provided, and the electrodes 2 and 3 are arranged on the surface. ing. The lid 1b is pivotally supported on one side edge of the case main body 1a so as to be openable and closable at an arbitrary angle. The case main body 1a has a sensor for detecting that the case main body 1a and the lid 1b are opened at a predetermined angle or more. 55 are provided. This sensor 55
Is a light amount detection sensor that detects that the case main body 1a and the lid 1b are opened by a predetermined angle or more based on the illuminance on the case main body 1a that changes when the lid 1b is opened, but may be a contact switch. The lid 1b is provided with a display unit 4 similar to that of the above-described embodiment on the back side in contact with the case body 1a in a closed state, and a time display unit (not shown) is provided on the front side. Have been. The electrodes 6 and 7 are arranged on the back side of the case body 1a.

In this embodiment, the circuit shown in FIG. 3 is provided in the case main body 1a, and although not shown, a clock circuit section for displaying the time on the time display section is provided on the lid 1b side. Is built-in.

In the present embodiment having the above structure, the subject is usually worn on one arm with the belts 16 and 17 (when viewing time information and the like), and the lid 1b is closed at this time. In a state where Thereby, the time display portion arranged on the surface of the lid 1b is located on the upper surface, and can be used as a normal wristwatch. When performing body fat measurement, as shown in FIG.
b is opened by a predetermined angle or more to stand up. Then, the sensor 55 detects that the lid 1b is opened by a predetermined angle or more and outputs a detection signal to the CPU 10, and the CPU 10 automatically switches from the time display mode to the measurement mode. Therefore, the processing after step S2 in the flowchart shown in FIG. 4 is executed, and the BMI and the body fat percentage are displayed.

Further, according to the present embodiment, since the electrodes 2 and 3 can be arranged by using the entire surface of the case body 1a, the electrodes 2 and 3 can be made large and the measurement accuracy can be increased. . In addition, by closing the lid 1b during non-measurement, it is possible to prevent the electrodes 2 and 3 from being contaminated, to suppress the occurrence of errors during measurement, and to hide the electrodes 2 and 3 from the viewpoint of design. This is advantageous.
Furthermore, when the lid 1b is opened, the mode can be automatically shifted to the measurement mode, whereby the measurement can be started smoothly and the measurement of the fat percentage can be performed more easily and quickly.

Further, by providing the circuit shown in FIG. 3 on the case body 1b side and the clock circuit unit (not shown) on the lid 1b side, for example, a current generation circuit (oscillation circuit 1)
5 and a V / I circuit 14) can be expected to have a so-called shielding effect, which makes the clock circuit less susceptible to noise due to the high frequency voltage or high frequency current generated in the V / I circuit 14).

According to the first embodiment and the second embodiment, the measurement subject prepares for putting out the measuring device for the measurement of the body fat, or holds both hands free. Since it is possible to eliminate the inconvenience of having to perform the measurement, the body fat can be easily measured at any time.

(Third Embodiment) FIG. 8 shows a third embodiment of the present invention. This body fat measurement device is similar to the first embodiment in the case 110 and the case 110. A pair of belts 1 locked on opposite sides of the case 110
The display unit 4 is disposed on the front side of the case 110. However, unlike the first embodiment, the key input unit 5 provided on one side of the case 110 is different from the first embodiment.
3 and 54 also serve as high-frequency current output electrodes 2 and 6,
The key input units 51 and 52 provided on the other side also serve as the voltage detection electrodes 3 and 7.

In the present embodiment having the above configuration, when displaying the current time, the 12-6 o'clock direction is displayed as the vertical direction as shown in FIG. When performing the body fat measurement, the body fat measuring device is detached from the arm, and for example, as shown in FIG. 8B, the key input units 51 and 53 are pressed so as to be sandwiched between the left thumb 601 and the index finger 602, and The key input units 52 and 54 are pressed so as to be sandwiched between the index finger 701 and the index finger 702. Thereby, the left hand contacts the high-frequency current output electrode 2 and the voltage detection electrode 3, and the right hand contacts the high-frequency current output electrode 6 and the voltage detection electrode 7. As a result, as shown in FIG.
Are electrically connected to the voltage detection electrodes 3 and 7 via the human body.

Further, the key input unit 5 is held with both hands in this manner.
1 to 54, these four key input sections 51 to 51
54 becomes a state of simultaneous pushing. Then, the CPU 10 detects the simultaneous pressing of the key input units 51 to 54 and displays the same on the display unit 4.
Set the 3-9 o'clock direction to the vertical direction (3 o'clock direction is up) and automatically switch to the measurement mode. Therefore, the processing after step S2 in the flowchart shown in FIG. 4 is executed, and the BMI and the body fat percentage are displayed.

In this case, the display section 4 is composed of a dot matrix liquid crystal, and in the first and second embodiments,
As a substitute for the letters “slim”, “normal”, “light obesity”, and “obesity” printed on the display unit 4, the content corresponding to the measurement result is selected from among these four steps and displayed on the display unit 4. To be displayed.

According to the present embodiment, the case 11
Since there is no need to separately arrange a plurality of electrodes 2, 3, 6, 7 on the 0 itself, it is advantageous in terms of design and space, and also serves as the key input units 51 to 54.
When all the buttons are pressed at the same time, the mode automatically shifts to the measurement mode, and the measurement of the body fat percentage can be started as it is, so that the measurement of the body fat percentage can be more easily and quickly performed.

Also, in the case of the third embodiment, the electrodes 2, 52, 53, 54 correspond to the key inputs 51, 52, 53, 54 respectively.
3, 6, and 7 may be arranged.

(Fourth Embodiment) FIGS. 9 to 13 show a fourth embodiment of the present invention. In a wristwatch-type body fat measuring device, an accurate measurement can be made without violating the measuring principle. This allows easy measurement. That is, in the measurement of body fat using the four-terminal electrode method,
Each loop such that a loop passing through a human body formed by a pair of output electrodes for outputting a high-frequency current is larger than a loop passing through a human body formed by a pair of detection electrodes for detecting voltage. It is necessary to bring the electrodes into contact with the skin of the human body. However, for example, in the arrangement configuration of the electrodes 6 and 7 shown in FIG. 1B, when the electrode 6 is mounted on the left wrist, the electrode 6 is on the hand side and the electrode 7 is on the near side closer to the body, and is mounted on the right hand. On the contrary, the electrode 6 is on the near side and the electrode 7 is on the near side. Therefore, assuming that the electrode 6 is for high-frequency output, when the electrode 6 is mounted on the left hand, a loop passing through a human body formed by a pair of output electrodes for outputting a high-frequency current is used to detect a voltage. Although it is larger than the loop formed by the pair of detection electrodes and passing through the human body, it is not so when attached to the right hand, making accurate measurement difficult.

Therefore, whether the device is worn on the left or right arm is an important requirement for enabling accurate measurement. Therefore, in the present embodiment, the characteristic QRST of the first lead of the electrocardiogram led from the left and right arms.
By determining the polarity of the waveform, especially the R-wave, the arm on which the device is mounted is specified, and the role of the four electrodes, that is, a pair of outputs for outputting high-frequency currents, is determined by the results of the specification. An electrode is used to determine whether to use a pair of detection electrodes for detecting a voltage.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 9, the body fat measurement device according to the present embodiment has the same external configuration as that of the above-described first embodiment, and is locked to the case 120 and the opposing side portions of the case 120. And a pair of belts 16, 17. Key input sections 51, 52, 53, 54 are provided on other opposite sides of the case 120. On the front side of the case 120, as shown in FIG. 3A, a display section 4 made of an LCD is disposed at the center, and a pair of electrodes 2, 3 are disposed on the left and right sides near the belt 17. The pair of electrodes 2 and 3 are mutually insulated by being arranged at an appropriate interval. On the back side of the case 120, a pair of electrodes 6, 7 are disposed on the left and right as shown in FIG. 3B, and the pair of electrodes 6, 7 are also disposed at appropriate intervals. Are insulated from each other.

FIG. 10 is a circuit diagram showing details of the vicinity of the electrodes in the circuit of the body fat measurement device according to the present embodiment, which is arranged in the case 120. That is, the differential amplifier circuit 18 (details will be shown in FIG. 11 described later) and the V / I circuit 14 are connected to the input port of the CPU 10 shown in FIG. 3, and the switch control circuit 19 is connected to the output port of the CPU 10. , 20 are connected. Switch control circuit 1
9 controls the switches SW1, SW2, SW5 and SW6, and the switch control circuit 20 controls the switches SW1 and SW2.
3, SW4, SW7, and SW8.

The movable terminals of the switches SW1 and SW3 and the movable terminals of SW2 and SW4 are connected, the movable terminal of SW5 is connected to the electrode 3, the movable terminal of SW6 is connected to the electrode 7, and the switches SW7 and SW7 are connected. The movable terminal of SW8 is connected to the input section of the signal amplifier 11 respectively.
The signal amplifier 11 is connected to the traveling integrator 12, as shown in FIG.

The switch SW1 is connected to the V / I circuit 14
And a fixed terminal C2 connected to the differential amplifier circuit 18 and the fixed terminal C9 of the switch SW5. The switch SW2 is connected to the V / I circuit 14. It has a fixed terminal C3 and a fixed terminal C4 connected to the differential amplifier circuit 18. Switch SW
3 has a fixed terminal C5 connected between the electrode 3 and the switch SW5, and a fixed terminal C6 connected to the electrode 2, and the switch SW4 has a fixed terminal C5 connected to the electrode 6.
7 and a fixed terminal C8 connected between the electrode 7 and the switch SW6. The switch SW5 includes a fixed terminal C9 connected to the fixed terminal C2 of the switch SW1 and a fixed terminal C connected to the fixed terminal C14 of the switch SW7.
10 and the switch SW6 is a switch SW6.
8 has a fixed terminal C11 connected to the fixed terminal C15 and a fixed terminal C12 connected to the differential amplifier circuit 18. The switch SW7 includes a fixed terminal C13 connected between the fixed terminal C6 of the switch SW1 and the electrode 2, and a fixed terminal C1 connected to the fixed terminal C10 of the switch SW5.
And switch SW8 is switch SW6.
And a fixed terminal C16 connected between the fixed terminal 7 and the electrode 6 of the switch SW4.

FIG. 11 is a circuit diagram showing the details of the differential amplifier circuit 18. The differential amplifiers 181, 182, 18
3 and a signal amplifier 184. The switches SW 1 and S 1 are connected to one input terminal of the differential amplifier 181.
The electrode 2 or the electrode 3 is connected according to the state of W3 and SW5, and the electrode 7 is connected to one input terminal of the differential amplifier 182 according to the state of the switch SW6. The electrode 6 is connected to the other input terminals of the differential amplifiers 181 and 182 according to the states of the switches SW and SW4. The output terminals of the differential amplifiers 181 and 182 are connected to the input terminal of the differential amplifier 183, and the output terminal of the differential amplifier 183 is connected to the input terminal of the signal amplifier 184. The output is provided to the CPU 10.

In the present embodiment having the above configuration, the subject is worn on one arm by the belts 16 and 17. As a result, the electrodes 6 and 7 on the back side contact the skin of one arm of the subject. Then, when performing body fat measurement, a predetermined key operation is performed to set a body fat measurement mode, and then the other finger is placed on the surface electrodes 2 and 3.
Contact. As a result, as shown in FIG. 10, the electrodes 2, 6 are brought into conduction with the electrodes 3, 7 via the human body.

On the other hand, when the body fat measurement mode is set, C
The PU 10 starts the operation according to the flowchart shown in FIG. 12 based on the program stored in the ROM 9, and initializes the previous measurement data in the work area (Step S11). Next, data such as the height, weight, age, and gender of the user are sequentially read from the RAM 8 (step S12), and a BMI index is calculated based on the read weight and height (step S13).

Thereafter, the switches SW1, SW2, S
The movable contacts of W5 and SW6 are fixed contacts C2, C4, and C, respectively.
9 and C12, the switch control circuit 19 is controlled (step S14), and the movable contacts of the switches SW3 and SW4 are fixed contacts C6 and C4, respectively.
7 so that the switch control circuit 20
Is controlled (step S15). As a result, the electrodes 2 and 3 arranged on the front side are temporarily short-circuited, and the electrode 7 among the electrodes 6 and 7 arranged on the back side acts as an induction electrode for detecting a cardiac radio wave. Function as common electrodes for detecting the electromagnetic wave of the device.

In order to obtain the first guided heart radio wave with such an electrode arrangement, as shown in FIG. 11, the differential amplifier circuit 18 regards the electrode 6 as a signal common level or reference, and sets the electrode 2 (3 ) Is obtained. At the same time, the potential of the electrode 7 is obtained, and the potential difference between the electrode 2 (3) and the electrode 7 is obtained. Since the potential difference obtained in this manner has a strength of about several millivolts, the signal amplifier 1 is used for easy detection.
The signal is amplified by 84 and supplied to the CPU 10.

As a result, the CPU 10 can obtain the first guiding radio wave including the characteristic QRST waveform as shown in FIG. 13 (a) or (b). Therefore, in the next step S16, it is determined whether or not the heart waves can be detected from the electrodes 2 and 3, in particular, whether or not the R wave determined in the next step S18 has been detected (step S16). If the error cannot be detected, an error is displayed on the display unit 4 (step S17), and the process proceeds to step S10 in FIG. 4 and the error display is continued until a predetermined time has elapsed.

If a heart radio wave, particularly an R wave, can be detected, the polarity of the R wave is determined (step S18), and the direction of the spike signal of the R wave is determined to be positive or negative (step S19). ). That is, the polarity of the spike signal of the R wave is reversed depending on whether the arm on which the device is mounted is left or right, and the device is mounted on the left wrist and the right finger is applied to the electrode 2 (3).
When a signal is detected while contacting the
As shown in (a), the R wave becomes a negative spike signal. Conversely, the device is attached to the right wrist and the left finger is
When a signal is detected while making contact with (3), the R-wave becomes a positive spike-like signal as shown in FIG.

Therefore, if the result of the determination in step S19 is that the spike signal of the R wave is in the negative direction, the body fat measuring device according to the present embodiment is mounted on the left wrist, and the electrodes 2 and 3 is touched. In this case, the switch control circuit 19 is controlled so that the movable contacts of the switches SW1, SW2, SW5, and SW6 are connected to the fixed contacts C1, C3, C10, and C11, respectively (Step S).
20). Further, switches SW3, SW4, SW7, S
The movable contacts of W8 are fixed contacts C6, C7, C14, C
15 so that the switch control circuit 2
0 is controlled (step S21). Thereby, the electrode 2
And the electrode 6 are set as high-frequency current output electrodes, and the electrodes 3 and 7 are set as voltage detection electrodes (step S22).

At this time, when the body fat measurement device is mounted on the left wrist as described above, the electrode 6 (electrode for outputting high-frequency current) is on the finger side far from the body and the electrode 7
(Electrode used for voltage detection) is closer to the body than this. If the right finger touches the electrode 3 with the second finger and the third finger longer than the second finger touches the electrode 2, the electrode 2 (electrode for high-frequency current output) is far from the body and the electrode 3
(Electrode used for voltage detection) is closer to the body than this. Therefore, the loop through the human body formed by the pair of electrodes 2 and 6 for outputting the high-frequency current is larger than the loop through the human body formed by the pair of electrodes 3 and 7 for detecting the voltage. . Therefore, by starting the measurement in this state (step S23), the body fat can be accurately measured.

On the other hand, as a result of the determination in step S19, R
If the spike signal of the wave is in the positive direction, the body fat measurement device according to the present embodiment is attached to the right wrist, and the electrode 2 is
3 is touched. In this case, the switches SW1, SW2, SW5, S5, as in step S20 described above.
The movable contacts of W6 are fixed contacts C1, C3, C10, C
11 so that the switch control circuit 1
9 (step S24). Further, the switch S
The switch control circuit 20 is controlled so that the movable contacts of W3, SW4, SW7, and SW8 are connected to the fixed contacts C5, C8, C13, and C16, respectively (step S2).
5). Thus, the electrodes 3 and 7 are set as high-frequency current output electrodes, and the electrodes 2 and 6 are set as voltage detection electrodes (step S26).

At this time, when the body fat measuring device is mounted on the right wrist as described above, the electrode 7 (electrode for outputting high-frequency current) is on the hand side far from the body and the electrode 6
(Electrode used for voltage detection) is closer to the body than this. When the right finger touches the electrode 2 with the second finger and touches the electrode 3 with the third finger longer than the second finger, the electrode 3 (the electrode used for high-frequency current output) is far from the body and the electrode 2
(Electrode used for voltage detection) is closer to the body than this. Therefore, a loop through the human body formed by the pair of electrodes 3 and 7 for outputting a high-frequency current is larger than a loop through the human body formed by the pair of electrodes 2 and 6 for detecting voltage. . Therefore, by starting the measurement in this state (step S23), the body fat can be accurately measured.

(Fifth Embodiment) FIG. 14 to FIG.
13 shows a fifth embodiment of the present invention. As shown in FIG. 14, the body fat measurement device according to the present embodiment also has the same external configuration as a wristwatch, and includes a case 130 and a pair of belts 16 locked on opposite sides of the case 130. 17. Key input sections 51, 52, 53, 5 are provided on the other opposite sides of the case 130.
4 are provided. On the front side of the case 130, the display unit 4 made of an LCD is disposed at the center, and the electrodes 22 are arranged at both corners near the belt 16 from the surface to the side.
The electrodes 31 and 32 are arranged at both corners near the belt 17 from the surface to the side. These electrodes 21, 22, 31, and 32 are insulated from each other. A pair of electrodes 6 is provided on the back side of the case 130.
1 and 71 are disposed on the left and right.
1 and 71 are also insulated from each other by being arranged at appropriate intervals.

FIG. 15 is a block diagram showing the configuration of the circuit of the body fat measurement device according to the present embodiment, which is disposed in the case 130. As shown in this block diagram,
The V / I circuit 14 is connected to the electrodes 6, 21 and 22 via a switch control circuit 30. The electrode 7,
The switches 31 and 32 are connected to a signal amplifier 11 including a filter via a switch switching control circuit 34, and both switch switching control circuits 30 and 34 are connected to each other. The switch switching control circuits 30 and 34 are configured by a gate or the like or an LSI chip or the like which is software-controlled.
The switching operation is performed by the control signal from the controller 10 as shown in a flowchart described later. The electrodes 31, 3
2 is detected from the switch switching control circuit 34 by the CPU.
10 is input. Note that other circuit configurations, that is, the oscillation circuit 15, the traveling integrator 12, the A / D
The provision of the converter 13, the RAM 8, the ROM 9, the display unit 4, and the key input units 51 to 54 is the same as that of the embodiment shown in FIG.

In the present embodiment having the above configuration, the subject is worn on one arm by the belts 16 and 17. As a result, the electrodes 61 and 71 on the back surface contact the skin of one arm of the subject. Then, when performing body fat measurement, a predetermined key operation is performed to set a body fat measurement mode. Then, the CPU 10
The operation is started according to the flowchart shown in FIG. 16 based on the program stored in the storage area, and the previous measurement data in the work area is initialized (step S1).
1). Next, data such as the height, weight, age, and gender of the user are sequentially read from the RAM 8 (step S1).
2) A BMI index is calculated based on the read weight and height (step S13).

Thereafter, both switch switching control circuits 3
By controlling the electrodes 0 and 34, the electrodes 6 and 7 are connected to the V / I circuit 14, and a high-frequency current is output from the electrodes 6 and 7 (step S35). Next, the switching control circuit 34 is controlled to connect the electrodes 31 and 32 to the signal amplifier 11,
It is determined whether a voltage has been detected in any one of steps 1 and 32 (step S35). And the electrodes 31, 32
If no voltage is detected in any of the above,
An error is displayed on the display unit 4 (step S36), and the process proceeds to step S10 in FIG. 4 and the error display is continued until a predetermined time elapses.

If a voltage is detected at one of the electrodes 31 and 32 at step S35, it is determined which of the electrode 31 and the electrode 32 has detected a normal signal (step S37). ). That is, as described above, in the body fat measurement device according to the present embodiment,
Electrodes 2 are provided at both corners of case 130 near belt 16.
2 and 21 are arranged, and electrodes 31 and 32 are arranged at both corners near the belt 17. Therefore, FIG.
As shown in (a), when the device is mounted on the left wrist 61 and the right hand 70 is brought into contact with a pair of electrodes, the first finger 701 of the right hand is brought into contact with the electrode 31 as shown in FIG. The finger 702 is brought into contact with the electrode 21 on the diagonal line, and the first finger 701 of the right hand and the second finger 702 of the right hand form the electrode 3.
It is a natural contact form to sandwich the first and the first 21.

Therefore, as a result of the judgment in step S37, if it is the electrode 31 that a normal signal is detected, as shown in FIG.
1, the first finger 701 of the right hand is brought into contact with the electrode 31 and the second finger 702 of the right hand is brought into contact with the electrode 21 on the diagonal line. it can. In this case, by controlling both switch switching control circuits 30 and 34, the electrode 21 and the electrode 6 are used as high-frequency current output electrodes, and the electrode 31 and the electrode 7 are used as voltage detection electrodes. Is performed (step S38).

At this time, the body fat measuring device is connected to the left wrist 6
In the state of being attached to 1, the electrode 6 for high-frequency current output is on the hand side far from the body, and the electrode 7 for voltage detection is on the hand side closer to the body as described above. When the right finger first finger 701 touches the electrode 31 and the second finger 702 longer than the first finger touches the electrode 21, the electrode 21 for high-frequency current output is far from the body and used for voltage detection. The electrode 31 is closer to the body than this. Therefore, a pair of electrodes 21 for outputting a high-frequency current,
The loop formed by the body 6 and passing through the human body is larger than the loop formed by the pair of electrodes 31 and 7 for detecting the voltage and passing through the human body. Therefore, by performing the measurement calculation in this state, the body fat can be accurately measured.

On the other hand, if the result of the determination in step S37 is that the electrode 32 has detected a normal signal, the device is mounted on the right wrist 71 as shown in FIG. Thus, it can be considered that a natural and proper contact form in which the first finger 601 of the left hand 60 contacts the electrode 32 and the second finger 602 contacts the diagonal electrode 22 is formed. In this case, both switch switching control circuits 30 and 34 are controlled so that the electrode 22 and the electrode 7 serve as high-frequency current output electrodes, and the electrode 32 and the electrode 6
Are used as voltage detection electrodes, and a measurement calculation of body fat is executed (step S39).

At this time, in a state where the body fat measuring device is mounted on the right wrist, the electrode 7 for outputting a high-frequency current is the hand side far from the body and the electrode 6 for voltage detection is the same as described above. Is also close to the torso. Also,
When the first finger 601 of the left hand touches the electrode 32 and the second finger 602 longer than the first finger touches the electrode 22, the electrode 22 for high-frequency current output is far from the body, and the electrode 32 for voltage detection is used. Is closer to the fuselage than this. Therefore, the loop through the human body formed by the pair of electrodes 22 and 7 for outputting the high-frequency current is larger than the loop through the human body formed by the pair of electrodes 32 and 6 for detecting the voltage. . Therefore, by performing the measurement calculation in this state, the body fat can be accurately measured.

(Modification of Fifth Embodiment) FIGS. 18 and 19 show a modification of the fifth embodiment of the present invention. Is set on the body fat measurement mode, the CPU 10
FIG. 1 is based on the program stored in the ROM 9 and
The operation is started according to the flowchart shown in FIG. In this flowchart, the processing in steps S11 to S13, step S34, and step S36 is the same as that in the flowchart shown in FIG. And step S
In step S45 following step S34, the switching control circuit 34 is controlled to connect the electrodes 21 and 22 to the signal amplifier 11, and it is determined whether or not a voltage is detected at any one of the electrodes 21 and 22 (step S45). . And electrode 2
If no voltage is detected in any of the steps 1 and 22, an error is displayed on the display unit 4 (step S3).
6), the process proceeds to step S10 in FIG. 4 and this error display is continued until a predetermined time has elapsed.

If a voltage is detected at one of the electrodes 21 and 22 in step S45, it is determined which of the electrode 21 and the electrode 22 has detected a normal signal (step S47). ). That is, in the present embodiment, as shown in FIG. 19A, when the device is mounted on the left wrist 61, the second finger 72 of the right hand is
It is assumed that contacting the third finger 73 of the right hand with the electrode 32 on the diagonal line is an appropriate contact form while making contact with the second contact 2.

Therefore, as a result of the determination in step S47, if it is the electrode 22 that a normal signal is detected, as shown in FIG.
1, the second finger 72 of the right hand is brought into contact with the electrode 22, and the third finger 73 of the right hand is brought into contact with the electrode 32 on the diagonal line, and it can be considered that an appropriate contact form is formed. In this case, by controlling both switch switching control circuits 30 and 34, the electrode 32 and the electrode 6 are used as high-frequency current output electrodes, and the electrode 22 and the electrode 7 are used as voltage detection electrodes. Is performed (step S48).

At this time, the body fat measuring device is connected to the left wrist 6
In the state of being attached to 1, the electrode 6 for high-frequency current output is on the hand side far from the body, and the electrode 7 for voltage detection is on the hand side closer to the body as described above. Also, when the right second finger 72 touches the electrode 22 and the third finger 73 longer than the second finger touches the electrode 32, the electrode 32 for high-frequency current output is far from the body and used for voltage detection. The electrode 22 is closer to the body than this. Therefore, the loop through the human body formed by the pair of electrodes 32 and 6 for outputting the high-frequency current is larger than the loop through the human body formed by the pair of electrodes 22 and 7 for detecting the voltage. . Therefore, by performing the measurement calculation in this state, the body fat can be accurately measured.

Further, in the present embodiment, FIG.
As shown in (b), when the device is mounted on the right wrist 71, it is appropriate that the second finger 62 of the left hand contacts the electrode 21 and the third finger 63 of the left hand contacts the electrode 31 on the diagonal line. It is assumed that the contact form is simple. Therefore, as a result of the determination in step S47, if it is the electrode 21 that a normal signal is detected, it can be considered that the proper contact form shown in FIG. 19B is formed.
In this case, both switch switching control circuits 30, 3
4 to control the body fat by using the electrodes 31 and 7 as high-frequency current output electrodes and the electrodes 21 and 6 as voltage detection electrodes (step S4).
9).

At this time, the body fat measuring device is connected to the left wrist 6
In the state of being attached to 1, the electrode 6 for high-frequency current output is on the hand side far from the body, and the electrode 7 for voltage detection is on the hand side closer to the body as described above. Also, when the left second finger 62 touches the electrode 21 and the third finger 63 longer than the second finger touches the electrode 31, the electrode 31 for high-frequency current output is far from the body and used for voltage detection. The electrode 21 is closer to the body than this. Therefore, a loop passing through the human body formed by the pair of electrodes 31 and 7 for outputting the high-frequency current is larger than a loop passing through the human body formed by the pair of electrodes 21 and 6 for detecting the voltage. . Therefore, by performing the measurement calculation in this state, the body fat can be accurately measured.

(Sixth Embodiment) FIG. 20 to FIG.
14 shows a sixth embodiment of the present invention. As shown in FIG. 20, the body fat measurement device according to the present embodiment also has the same external configuration as a wristwatch, and includes a case 140 and a pair of belts 16 locked on opposite sides of the case 140. 17. Key input sections 51, 52, 53, 5 are provided on the other opposite sides of the case 140.
4 are provided. On the front side of the case 140, a display unit 4 composed of an LCD is disposed at a central portion, and a bezel 40 is rotatably mounted on a peripheral portion. Electrodes 2 are provided on opposite ends of the bezel 40 on the belt 16 side and the end on the belt 17 side.
3 and an electrode 33 are provided.
3 are mutually insulated. Further, a pair of electrodes 6, 7 similar to the embodiment shown in FIG.
7 are also mutually insulated by being arranged at appropriate intervals.

FIG. 21 is a block diagram showing the configuration of the circuit of the body fat measurement device according to the present embodiment, which is arranged in case 140. As shown in this block diagram,
The V / I circuit 14 is connected to the electrodes 6, 23 via a switch control circuit 90. The electrodes 7, 33
Is connected to a signal amplifier 11 including a filter via a switch switching control circuit 91, and both switch switching control circuits 90 and 91 are connected to each other. The switch switching control circuits 90 and 91 are configured by gates or the like or chips controlled by software similarly to the switch switching control circuits 30 and 34 shown in FIG. 15, and as shown in a later-described flowchart by a control signal from the CPU 10. The switching operation is performed. The bezel rotation direction detecting unit 92 detects the rotation direction of the bezel 40 and outputs the detected rotation direction to the CPU 10, where the rotation direction of the bezel 40 is negative (-α) as shown in FIG. ) Direction, and FIG.
As shown in the figure, the counterclockwise direction is defined as a positive (α) direction.
Note that the other circuit configuration, that is, the provision of the oscillation circuit 15, the progress integrator 12, the A / D converter 13, the RAM 8, the ROM 9, the display unit 4, and the key input units 51 to 54 is the same as that shown in FIG. This is the same as the embodiment.

In the present embodiment having the above configuration, the subject is worn on one arm by the belts 16 and 17. As a result, the electrodes 6 and 7 on the back side contact the skin of one arm of the subject. Then, when performing body fat measurement, a predetermined key operation is performed to set a body fat measurement mode. Then, the CPU 10 starts the operation according to the flowchart shown in FIG. 23 based on the program stored in the ROM 9, and initializes the previous measurement data in the work area (step S11). Next, data such as the height, weight, age, and gender of the user are sequentially read from the RAM 8 (step S12), and a BMI index is calculated based on the read weight and height (step S13).

Next, an internal timer is started (step S54), and thereafter, it is determined whether or not the rotation of the bezel 40 is detected (step S55). Bezel 40
If the rotation is not detected, it is determined whether or not the time is up (step S56). If the time is up, an error is displayed on the display unit 4 (step S57), and the step of FIG. Proceeding to S10, this error display is continued until a certain time has elapsed.

At this time, the person to be measured wears the body fat measuring device on the left arm, and the first finger 701 of the right hand is placed on one electrode 33 of the bezel 40 in the present embodiment, as shown in FIG. And the right hand second finger 702 is brought into contact with the other electrode 23, and the right hand first finger 701 and the right hand second finger 702 sandwich the electrodes 33 and 23 in an appropriate contact form. Suppose there is. When both arms are extended in this state, the angle of the arm changes, and the first finger 701 is moved.
The right hand sandwiching the electrodes 33 and 23 between the right hand and the second finger 702 naturally operates to rotate the bezel 40 in the negative direction (-α) as shown in FIG.

Therefore, in step S55, the bezel 40
Is detected, and if the rotation direction is found to be the negative (-α) direction in step S58, the device is mounted on the left wrist, and the first finger 701 of the right hand is brought into contact with the electrode 33, It can be considered that the right arm second finger 702 is in contact with the electrode 23 and the arm is extended in an appropriate contact form. In this case, by controlling both switch switching control circuits 90 and 91, the electrode 23 and the electrode 6 are used as high-frequency current output electrodes, and the electrode 33 and the electrode 7 are used as voltage detection electrodes. Is performed (step S59).

At this time, in a state where the body fat measuring device is mounted on the left wrist, the electrode 6 for outputting a high-frequency current is the hand side far from the body and the electrode 7 for voltage detection is the same as described above. Is also close to the torso. Also,
When the right hand first finger 701 touches the electrode 33 and the second finger 702 longer than the first finger touches the electrode 23, the electrode 23 for high-frequency current output is far from the body and the electrode 33 for voltage detection. Is closer to the fuselage than this. Therefore, a loop passing through the human body formed by the pair of electrodes 23 and 6 for outputting the high-frequency current is larger than a loop passing through the human body formed by the pair of electrodes 33 and 7 for detecting the voltage. . Therefore, by performing the measurement calculation in this state, the body fat can be measured accurately, and since the measurement is performed with both arms extended, the measurement value can be made more accurate. it can.

On the other hand, if the result of determination in step S58 is that the rotation direction of the bezel 40 is the positive (α) direction as shown in FIG. 22B, the device is mounted on the right wrist, and 17B, the first finger 601 of the left hand
Is brought into contact with one electrode 33 of the bezel 40 in the present embodiment, and the second finger 702 of the left hand is brought into contact with the electrode 23, and it can be considered that the arm is extended in an appropriate contact form. In this case, by controlling both switch switching control circuits 90 and 91, the electrode 23 and the electrode 7 are used as high-frequency current output electrodes, and the electrode 33 and the electrode 6 are used as voltage detection electrodes. Is performed (step S60).

At this time, in a state where the body fat measuring device is mounted on the right wrist, the electrode 7 for outputting a high-frequency current is the hand side far from the body and the electrode 6 for detecting the voltage is the same as described above. Is also close to the torso. Also,
When the first finger 601 of the left hand touches the electrode 33 and the second finger 602 longer than the first finger touches the electrode 23, the electrode 23 for high-frequency current output is far from the body and the electrode 33 for voltage detection. Is closer to the fuselage than this. Therefore, the loop through the human body formed by the pair of electrodes 23 and 7 for outputting the high-frequency current is larger than the loop through the human body formed by the pair of electrodes 33 and 6 for detecting the voltage. . Therefore, by performing the measurement calculation in this state, the body fat can be measured accurately, and since the measurement is performed with both arms extended, the measurement value can be made more accurate. it can.

(Seventh Embodiment) FIG. 24 to FIG.
14 shows a seventh embodiment of the present invention. As shown in FIG. 24, on the belt 17 side of the bezel 40, mutually insulated electrodes 23 and 33 are provided side by side, and other configurations are the same as those of the above-described sixth embodiment. . The bezel 40 is initially in the state shown in FIG. 24, and has a positive (β) direction, which is a counterclockwise direction shown in FIG. 25A, and a negative (β) direction, which is a clockwise direction shown in FIG. −β) direction. The bezel rotation direction detection unit 40 determines that the bezel 40 has 45 ≦ β ≦ 90 °,
And when −45 ≦ −β ≦ −90, the rotation of the bezel 40 is detected.

In the present embodiment having the above configuration, the subject is worn on one arm with the belts 16 and 17. As a result, the electrodes 6 and 7 on the back side contact the skin of one arm of the subject. Then, when performing body fat measurement, a predetermined key operation is performed to set a body fat measurement mode. Then, the CPU 10 starts the operation according to the flowchart shown in FIG. 26 based on the program stored in the ROM 9, and initializes the previous measurement data in the work area (step S51). Next, data such as the height, weight, age, and gender of the user are sequentially read from the RAM 8 (step S52), and a BMI index is calculated based on the read weight and height (step S53).

Next, an internal timer is started (step S54), and thereafter, it is determined whether or not the rotation of the bezel 40 is detected (step S55). Bezel 40
If the rotation is not detected, it is determined whether or not the time is up (step S56). If the time is up, an error is displayed on the display unit 4 (step S57), and the step of FIG. Proceeding to S50, this error display is continued until a certain time has elapsed.

At this time, the person to be measured wears the body fat measuring device on the left arm, and the second finger 72 of the right hand is applied to one electrode 32 of the bezel 40 in the present embodiment, as shown in FIG. When the third finger 73 of the right hand is brought into contact with the other electrode 33 and the bezel 40 is to be rotated in this state, it is difficult to rotate the bezel 40 in the negative (-β) direction. Only rotation in the (β) direction becomes easy.

Therefore, in step S55, the bezel 40
Rotation (45 ≦ β ≦ 90 ° or -45 ≦ -β ≦ -90)
Is detected, and the rotation direction is positive (β) in step S58.
If it is determined that the direction is the direction, it is assumed that the device is attached to the left wrist and the second finger 72 of the right hand is in contact with the electrode 32 and the third finger 73 of the right hand is in contact with the electrode 33. Can be. In this case, by controlling both switch switching control circuits 90 and 91, the electrode 33 and the electrode 6 are used as high-frequency current output electrodes, and the electrode 23 and the electrode 7 are used as voltage detection electrodes. (Step S61).

At this time, in a state where the body fat measurement device is mounted on the left wrist, the electrode 6 for outputting the high-frequency current is the hand side far from the body and the electrode 7 for detecting the voltage is the same as described above. Is also close to the torso. Also,
When the right second finger 72 touches the electrode 23 and the third finger 73 longer than the second finger touches the electrode 33, the electrode 33 for high-frequency current output is far from the body, and the electrode 23 for voltage detection is used. Is closer to the fuselage than this. Therefore,
The loop through the human body formed by the pair of electrodes 33 and 6 for outputting the high-frequency current is larger than the loop through the human body formed by the pair of electrodes 23 and 7 for detecting the voltage. Therefore, by performing the measurement calculation in this state, the body fat can be measured accurately, and since the measurement is performed with both arms extended, the measurement value can be made more accurate. it can.

On the other hand, the subject wears the body fat measuring device on the right arm and, as shown in FIG.
When the finger 62 is brought into contact with one electrode 33 of the bezel 40 in the present embodiment, the third finger 62 of the left hand is brought into contact with the other electrode 23, and the bezel 40 is rotated in this state, the bezel 40 is It is difficult to rotate in the (β) direction, and it is easy to rotate only in the negative (−β) direction.

Therefore, in step S55, the bezel 40
Rotation (45 ≦ β ≦ 90 ° or -45 ≦ -β ≦ -90)
Is detected, and the rotation direction is negative (−) in step S58.
β) direction, it is determined that the device is mounted on the right wrist, the second finger 62 of the left hand is in contact with the electrode 33, and the third finger 63 of the left hand is in contact with the electrode 23. Can be estimated. In this case, both switch switching control circuits 90 and 91 are controlled so that the electrode 23 and the electrode 7 are used as high-frequency current output electrodes, and
The measurement calculation of the body fat is executed using the and the electrodes 6 as the voltage detection electrodes (step S62).

At this time, in a state where the body fat measuring device is mounted on the left wrist, the electrode 6 for outputting a high-frequency current is the hand side far from the body and the electrode 7 for voltage detection is the same as described above. Is also close to the torso. Also,
When the left second finger 62 touches the electrode 33 and the third finger 63 longer than the second finger touches the electrode 23, the electrode 23 for high-frequency current output is far from the body and the electrode 33 for voltage detection. Is closer to the fuselage than this. Therefore,
The loop through the human body formed by the pair of electrodes 23 and 7 for outputting the high-frequency current is larger than the loop through the human body formed by the pair of electrodes 33 and 6 for detecting the voltage. Therefore, by performing the measurement calculation in this state, the body fat can be measured accurately, and since the measurement is performed with both arms extended, the measurement value can be made more accurate. it can.

(Eighth Embodiment) FIGS. 27 and 28 show an eighth embodiment of the present invention. As shown in FIG. 24, the RAM 8 has a time data storage area 8
1, a personal data storage area 82 and a measured value storage area 83 are provided. The time data storage area 81
This is an area used in the clock mode, and includes a counter for counting the current time and the like, and a buffer. The measured value storage area 83 stores the measured values of body fat measured by the processing according to each flow described above.

The personal data storage area 82 contains “height”
Each data of "weight", "birth date", and "arm to be worn" is stored, and "1" is written to the corresponding "right arm" or "left arm" of the "arm to be worn" to indicate that the corresponding arm is worn. This is done by: Each of these data is stored in advance by the user operating the key input units 51 to 54.

According to this embodiment, without detecting whether the device is worn on the left or right arm,
Based on the stored data of the `` arm to be worn '', the loop passing through the human body formed by the pair of output electrodes is larger than the loop passing through the human body formed by the pair of detection electrodes, Each electrode can be set appropriately for high-frequency current output or voltage detection. Further, the present age of the measurer at the time of measurement can be calculated from the data of “birth date” and can be added to the calculation of the body fat, whereby a more accurate measurement result can be obtained.

In this embodiment, data indicating the arm on which the device is worn is stored. However, any one of the four electrodes is used for outputting a high-frequency current or for detecting a voltage. It is also possible to store the information as to whether to perform switching control based on the stored information.

[0101]

As described above, according to the present invention, a loop formed by a pair of output electrodes for outputting a high-frequency current and passing through a human body is formed by a pair of detection electrodes for detecting a voltage. A body fat measurement device that measures body fat so as to be larger than a loop passing through a human body formed by electrodes, and the back side that comes into contact with an arm of a wearable body that can be worn on a human body arm, One of the output electrodes and one of the pair of detection electrodes are arranged, and the other of the pair of output electrodes and the other of the pair of detection electrodes are arranged on the surface side of the mounting body. Therefore, if the other finger is brought into contact with the other output electrode and the detection electrode,
Measurement of body fat becomes possible, and measurement of body fat percentage can be performed easily and quickly at any time.

Further, by arranging the electrodes in the main body of the apparatus, it is possible to supply power to the electrodes directly from the main body of the apparatus, thereby simplifying the circuit. Measurements can be performed without errors by ensuring adhesion to the skin.

Further, since the display means for displaying the measurement result is provided on the front side of the apparatus main body, the measurement result can be easily and quickly visually recognized.

Further, it is detected whether the device is mounted on the left or right arm of the human body, or the device is stored on the left or right arm. Based on this, the electrode is connected to the output electrode and the detection electrode. Since the switching is performed, even when the device is worn on either the left or right arm of the human body, a loop passing through the human body formed by the pair of output electrodes is formed by the pair of detection electrodes. Can be made larger than the loop passing through. Therefore, even when the wearing body is worn on either the left or right arm, body fat can be accurately measured using the four-terminal electrode method.

Further, by detecting the heart radio wave and detecting which of the left and right arms of the human body are worn based on the detection, the left or right arm of the human body is detected without affecting the appearance. be able to.

Further, by arranging the other of the pair of output electrodes and the other of the pair of detection electrodes respectively on the front surface side of the mounting body, the simple structure allows the right and left arms of the human body to be attached to either arm. It can be detected whether or not the camera is mounted.

Further, since it is detected whether the wrist is attached to the right or left arm of the human body based on the rotation direction of the rotatable bezel, the bezel is effectively used in a wristwatch having the bezel. Can be achieved.

Further, electrodes are arranged on the front side of the apparatus main body,
Since this is covered with a lid that can be opened and closed, the electrode can be prevented from being stained by the lid when measurement is not performed, and the occurrence of errors due to poor contact can be prevented before measurement, and the electrode is concealed. This is advantageous in terms of design.

Further, by providing a display means for displaying the measurement results on the lid, it is possible to open the lid at an arbitrary angle and visually recognize the measurement results at an easy-to-view angle.

[0110] Also, first display means for displaying the measurement result of body fat is provided on one side of the cover body covering the surface of the apparatus main body, and second display means for displaying the time on the other side. As a result, the appearance is similar to that of a wristwatch, and it can be carried without discomfort.

Further, since the measurement result of the body fat is displayed as a level, the level display makes it possible to recognize the evaluation of the measurement result at a glance.

Since the measurement is started by detecting the opening of the lid, the measurement can be started smoothly while protecting the electrodes by the lid.

Further, since a plurality of operation means having both a switch function of being pressed and turned on and a function of each electrode are provided, it is possible to operate each operation means simultaneously so as to operate the switch. Thereby, the contact state between the electrode and the human body necessary for measuring body fat is formed, and the measurement can be performed without errors. In addition, since the measurement is started by detecting the ON operations of these switches, the measurement can be started more smoothly.

[Brief description of the drawings]

FIG. 1A is a plan view of a body fat measurement device according to a first embodiment of the present invention, and FIG. 1B is a rear view thereof.

FIG. 2 is an enlarged view of a display unit.

FIG. 3 is a circuit diagram of the body fat measurement device according to the embodiment;

FIG. 4 is a flowchart showing a processing procedure when measuring body fat in the embodiment.

FIG. 5 is a plan view showing a modification of the surface side of the body fat measurement device according to the embodiment.

FIG. 6 is a rear view showing a modified example of the back side of the body fat measurement device according to the embodiment;

FIG. 7A is a perspective view of a body fat measurement device according to a second embodiment of the present invention, and FIG. 7B is a rear view of the same.

FIG. 8A is a plan view of a normal (current time display) mode of the body fat measurement device according to the third embodiment of the present invention, and FIG. 8B is a plan view of a measurement mode.

FIG. 9A is a plan view of a body fat measurement device according to a fourth embodiment of the present invention, and FIG. 9B is a rear view of the same.

FIG. 10 is a main part circuit diagram showing details of the vicinity of an electrode of the body fat measurement device according to the embodiment.

FIG. 11 is a circuit diagram showing details of a differential amplifier circuit in the embodiment.

FIG. 12 is a flowchart showing a main part of a processing procedure in the embodiment.

13 (a) is a waveform chart showing a QRST waveform when worn on the left hand, and FIG. 13 (b) is a QRST waveform when worn on the right hand
FIG. 4 is a waveform diagram showing a waveform.

14A is a plan view of a body fat measurement device according to a fifth embodiment of the present invention, FIG. 14B is a left side view, and FIG. 14C is a right side view.

FIG. 15 is a circuit diagram of the body fat measurement device according to the embodiment.

FIG. 16 is a flowchart showing a main part of a processing procedure in the embodiment.

FIG. 17A is a measurement image diagram when the body fat measurement device according to the embodiment is worn on a left wrist, and FIG.
FIG. 4 is a measurement image diagram when worn on the right wrist.

FIG. 18 is a flowchart showing a main part of a processing procedure according to a modification of the embodiment.

FIG. 19A is a measurement image diagram when the body fat measurement device according to the modification is worn on the left wrist, and FIG. 19B is a measurement image diagram when the body fat measurement device is worn on the right wrist.

FIG. 20 (a) is a plan view of a body fat measurement device according to a sixth embodiment of the present invention, (b) is a left side view, and (c) is a right side view.

FIG. 21 is a circuit diagram of the body fat measurement device according to the embodiment.

FIG. 22A is an explanatory diagram of a bezel rotation direction when the body fat measurement device according to the embodiment is attached to a left wrist;
(B) is an explanatory view of the bezel turning direction when worn on the right wrist.

FIG. 23 is a flowchart showing a main part of a processing procedure in the embodiment.

24A is a plan view of a body fat measurement device according to a seventh embodiment of the present invention, FIG. 24B is a left side view, and FIG. 24C is a right side view.

FIG. 25A is an explanatory diagram of a bezel rotation direction when the body fat measurement device according to the embodiment is attached to a left wrist;
(B) is an explanatory view of the bezel turning direction when worn on the right wrist.

FIG. 26 is a flowchart showing a main part of a processing procedure in the embodiment.

FIG. 27 is a diagram illustrating a memory configuration of a RAM according to an eighth embodiment of the present invention.

FIG. 28 is a memory configuration diagram of a personal data storage area in the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 1a Case main body 1b Lid 16, 17 Belt 2, 3 electrode 4 Display part 4a Segment 6, 7 electrode 10 CPU 19, 20 Switch control circuit 21, 22, 23 electrode 31, 32, 33 electrode 40 Bezel 92 Bezel rotation direction Detector 51, 52, 53, 54 Key input unit 82 Personal data storage area 120 cases

Claims (17)

[Claims] 1. A loop including a pair of output electrodes for outputting a high-frequency current and a pair of detection electrodes for detecting a voltage, wherein a loop formed by the pair of output electrodes and passing through a human body is provided. Contacting the pair of output electrodes with the skin of the human body so as to be larger than a loop formed by the pair of detection electrodes and passing through the human body, and detecting a body based on a voltage detected from the detection electrodes. A body fat measurement device for measuring fat, on the back side in contact with the arm of the wearable body that can be worn on the arm of the human body, one of the pair of output electrodes, and one of the pair of detection electrodes A portable body fat measurement device, comprising: arranging the other of the pair of output electrodes and the other of the pair of detection electrodes on the surface side of the mounting body. 2. The apparatus according to claim 1, wherein the mounting body includes an apparatus main body, and a belt-like body which is fixed to both ends of the apparatus main body and can be wound around the arm of the human body, wherein the electrodes are arranged on the apparatus main body. The portable body fat measurement device according to claim 1, wherein: 3. The apparatus according to claim 1, wherein the mounting body includes a device main body, and a band which is fixed to both ends of the device main body and can be wound around the arm of the human body, and wherein the electrodes are arranged on the band. The portable body fat measurement device according to claim 1, wherein: 4. The detection device according to claim 1, wherein the mounting body detects which of the right and left arms of the human body is mounted on the body, and the electrode is connected to the output electrode and the detection electrode based on a detection result of the detection unit. The portable body fat measurement device according to claim 1, further comprising a switching control unit. 5. The detection device according to claim 1, wherein the detection unit is a heart radio wave detection unit that detects a heart radio wave, and detects which of the left and right arms of the human body is worn based on the detected heart radio wave. Item 5. A portable body fat measurement device according to Item 4. 6. The other of the pair of output electrodes and the other of the pair of detection electrodes are respectively arranged on the front surface side of the mounting body, and the detection means includes a human body in any one of these electrodes. 5. The portable body fat measurement device according to claim 4, wherein whether the body is worn on the left or right arm of the human body is detected based on whether the body has contacted. 7. The mounting body has a rotatable bezel on the front surface side, and the detecting means detects which of the right and left arms of the human body is mounted on the basis of a rotation direction of the bezel. The portable body fat measurement device according to claim 4, wherein: 8. A storage means for storing whether the wearer wears the left or right arm with the measurer in association with personal data of the measurer, and storing the electrode based on the storage content of the storage means. 2. The apparatus according to claim 1, further comprising control means for switching between the output electrode and the detection electrode.
The portable body fat measurement device according to claim 1. 9. The portable body fat measurement device according to claim 1, further comprising a display unit for displaying a measurement result on a front surface side of the device main body. 10. The apparatus according to claim 1, wherein the other output electrode and the detection electrode are arranged on the front side of the apparatus main body, and a lid is provided to cover the surface of the apparatus main body so as to be openable and closable. 3. The portable body fat measurement device according to 2. 11. The display device according to claim 10, wherein said lid is provided with display means for displaying a measurement result of said body fat.
The portable body fat measurement device according to claim 1. 12. A first display means for displaying the measurement result of the body fat on one surface of the lid covering the surface of the device body, and a second display for displaying time on the other surface. 11. The portable body fat measurement device according to claim 10, further comprising means. 13. The portable body fat measurement device according to claim 9, wherein the display means has a display unit for displaying a level of the measurement result of the body fat. 14. The apparatus according to claim 1, further comprising control means for detecting the opening of the lid and starting the measurement.
13. The portable body fat measurement device according to 0, 11, or 12. 15. A loop including a pair of output electrodes for outputting a high-frequency current and a pair of detection electrodes for detecting a voltage, wherein a loop formed by the pair of output electrodes and passing through a human body is provided. Contacting the pair of output electrodes with the skin of the human body so as to be larger than a loop passing through the human body formed by the pair of detection electrodes, and detecting the body based on the voltage detected from the detection electrodes. A body fat measurement device for measuring fat, comprising: a device main body; and a plurality of operation means provided in the device main body and having both a switch function of being pressed and turned on and a function as each of the electrodes. Portable body fat measuring device characterized by the above-mentioned. 16. The portable body fat measurement device according to claim 15, further comprising a mounting means for mounting the device main body on an arm. 17. The portable body fat measurement device according to claim 15, further comprising control means for detecting an on operation of said plurality of switches and starting said measurement.