JPH11104104A - Integrated box type electrodes for human body impedance measurement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable to quickly measure human body impedance simply only by touching electrodes by both hands, by equipping a mutually insulated pair of electrode pairs on both sides of a box to compose four terminal electrodes and measuring human body impedance by touching both hands to the four terminal electrodes. SOLUTION: On measurement of human body impedance, right and left hands are put on hand touching parts HL, HR of a control box 11 to simultaneously touch both palms onto power supply side electrodes HL1, HR1 and detect side electrodes HL2, HR2. When an AC voltage is applied to the power supply side electrodes HL1, HR1 in that condition, an AC potential is generated between the detect side electrodes HL2, HR2 via both hands. The AC potential is converted into a DC voltage, the wave form is shaped, and the level and the offset are adjusted, and then the DC voltage is inputted to CPU to calculate human body impedance. At that time, output characteristics of the detect side circuit are preliminarily calibrated for correction of measurement errors by aging changes and temperature properties of the element comprising the measure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode for measuring the impedance of a human body by making conductive contact with the human body.

[0002]

To measure the impedance of the human body, a four-terminal electrode consisting of a pair of power supply electrodes and a pair of detection electrodes is brought into conductive contact with the human body, and an AC voltage is applied to the power supply electrodes to detect the impedance on the detection side. A human body impedance is measured by detecting an AC potential difference generated at the electrodes.

In the conventional electrode, one of the power supply side electrode and the detection side electrode is attached to the back of the foot, and the other is attached to the back of the hand, and the human body impedance is measured. For this reason, it was troublesome to take off the socks and attach the electrodes, which was troublesome to attach, and the length of the electrode cord was obstructive.

The applicant has provided a pair of grips on both left and right sides of a handle shaft so that the measurement of the human body impedance can be quickly performed by a simple operation without the trouble of attaching the electrodes to the body. Each part is provided with a pair of electrodes that are electrically insulated from each other to form a four-terminal electrode. A handle-type human body impedance measurement electrode that measures human body impedance by holding this grip with both hands has already been developed and commercialized. .

However, the handle-type human body impedance measuring electrode has a problem in attachment. When the handle-type electrode is directly attached to the housing, the handle portion protrudes and the set is deteriorated, and when connected with a cord, the sense of unity is lost and the appearance is deteriorated.
In addition, if the handle is made foldable or a storage space is provided, there is a problem that the cost is increased and the size is increased.

Therefore, the present invention provides a human body impedance measurement electrode which can be quickly measured by simple operation while maintaining the same operability, instead of the conventional handle-type human body impedance measurement electrode, and which is well-cured and takes up little space. An object of the present invention is to provide an electrode for impedance measurement.

[0007]

In order to achieve the above object, the present invention is configured as follows.

[0008] That is, a pair of electrodes electrically insulated from each other is provided on both sides of the housing to form a four-terminal electrode, and both hands are brought into contact with the four-terminal electrode to measure human body impedance. This is a housing-integrated human body impedance measurement electrode.

[0009]

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

FIG. 1 is a front view of a control box of a pulse beauty device equipped with a housing-integrated human body impedance measuring electrode embodying the present invention. The control box 11 has a built-in pulse power supply, a touch-type color liquid crystal panel P on the front, and insulating tentacles H on the left and right.
L and HR are arranged. Further, a power switch S, a connector C of the cable 12 connected to the electrode for performing the pulse beauty treatment, and an external power terminal T connected to the AC adapter are attached to the lower end side surface. The color liquid crystal panel P is not limited to the touch type, but may be a normal key switch type.

The tentacles HL and HR have a power supply side electrode H on the upper side.
Detection electrodes HL2 and HR2 are attached integrally to the housing below L1 and HR1 to form a four-terminal electrode composed of the power supply electrodes HL1 and HR1 and the detection electrodes HL2 and HR2.

The power supply side electrodes HL1, HR1 and the detection side electrode H
The surfaces of L2 and HR2 are coated with hard chrome plating or the like, and the inside of the wiring (not shown) is connected to the starting ends of the wiring by soldering or the like, and the ends are connected to a human body impedance measuring circuit.

FIG. 2 shows a block diagram of a human body impedance measuring circuit. The human body impedance measurement circuit 2 supplies a 50 kHz sine wave AC voltage generated by the oscillator 21 to the power supply side electrodes HL1 and HR1 via the drive circuit 22, the transformer T1, and the switch 23A.

As shown in FIG. 3, the tentacles HL and HR of the control box 11 are used to measure the human body impedance.
The left and right hands are placed on the power supply side electrodes HL1,
HR1 and the detection side electrodes HL2 and HR2 are simultaneously brought into contact. The tentacles HL and HR may be arranged on both sides of the control box 11 as shown in FIG. When an AC voltage is applied to the power supply electrodes HL1 and HR1 in this state, an AC potential difference is generated between the detection electrodes HL2 and HR2 via both hands.

The AC potential difference generated at the detection side electrodes HL2 and HR2 is converted into a DC voltage via a changeover switch 23A, a transformer T2, a bandpass filter 24, a rectifier circuit 25, and an amplifier 26, and the waveform is shaped, level adjusted, and offset adjusted. After that, the data is input to the CPU 4 via the A / D converter 27 and the I / O interface 6.

Before measuring the human body impedance, the output characteristics of the detection-side circuit are calibrated in advance in order to correct measurement errors due to aging and temperature characteristics of the elements constituting the human body impedance measuring device 2. That is, the relationship between the human body impedance Z, which is two variables, and the AC voltage V detected by the detection-side circuit is applied to a regression line Z = kV + C0. Then, the same predetermined AC voltage as when measuring the human body impedance Z is applied to both ends of the two resistors R1 and R2 whose resistance values are known, and the AC voltage V generated at both ends of the resistors R1 and R2 is detected. The proportional constant k and the fixed constant C0 of the regression line are obtained.

For this reason, a control signal is output from the CPU 4 to switch the changeover switch 23A via the I / O interface 6, the changeover unit 28, and the changeover control circuit 29A, so that the secondary side of the transformer T1 and the primary side of the transformer T2 are connected. Between 2
The two resistors R1 and R2 are connected. Next, a control signal is output from the CPU 4 and the changeover switch 23 is switched via the I / O interface 6, the changeover unit 28, and the changeover control circuit 29B.
B is switched, and the measurement target is switched to the resistor R1 or the resistor R2.

FIG. 5 shows a block diagram of the pulse power supply.
The pulse power source reads a treatment type and a power supply pattern specified by operating the color liquid crystal panel P from the memory 5 by the CPU 4 and divides a clock pulse of the reference clock generator 31 based on these types and patterns. Signals from I / O interface 6 and D
The pulse is input to the pulse generator 33 via the / A converter 32, and a pulse having a predetermined width and frequency is generated and supplied to the primary side of the transformer T3.

A transformer T4 is connected in parallel with the transformer T3, and a current detection circuit 34 is connected to the transformer T4 to measure a current value and monitor whether an overcurrent is flowing.
The detection current detected by the current detection circuit 34 is input to the CPU 4 via the A / D converter 35 and the I / O interface 6, and when the current value exceeds the reference, a cutoff switch is provided by the current protection circuit 36. Activate 37 to cut off the circuit.

One end of a switching circuit 38A, 38B is connected to one end and the other end on the secondary side of the transformer T4, and a plurality of electrodes E1-E1 are connected via a connector C with the other end of the switching circuit 38A, 38B being common. En is branched and connected. The switching circuits 382A and 38B are photocoupler-connected switching circuits, and the corresponding switching units 3
An arbitrary photocoupler is energized by the output signals of 9A and 39B to perform switching. Thereby, the electrode E1 is determined based on the specified treatment type and power supply pattern.
To En are arbitrarily combined to flow a predetermined pulse current.

The type of treatment is 5-10 Hz
Stimulates the deep part of the body with low-frequency pulses, exercises skeletal muscles to stimulate blood circulation, stimulates the body to tongue, and stimulates the top of the body with high-frequency pulses of 20 to 100 Hz. There is a drainage that has the effect of exercising the muscles of the upper layer to promote the flow of lymph and remove edema.

Drainage and toning include special drainage and special toning in which the stimulus is changed by cyclically increasing and decreasing the pulse voltage. In addition to normal drainage and toning, in which pulses are simultaneously applied to a plurality of electrodes, time-series drainage in which pulses are applied to a plurality of electrodes in a time-sequential manner and time-series toning, or a plurality of time-sharing tones simultaneously. There are time division drainage and time division toning in which a pulse is applied between the electrodes.

[0023]

As described above, according to the present invention, a pair of tentacles is provided on both sides of the housing, and a pair of electrodes which are electrically insulated from each other is provided on each of the tentacles. The body impedance is measured with both hands in contact with the part. Therefore, according to the present invention, since the electrodes are only touched with both hands, there is no need to attach the electrodes to the body, and the measurement of the impedance of the human body can be quickly performed by a simple operation. In addition, when operating the panel on the front of the housing, there is no need to change or hold it like an electrode handle, and the hand is not closed, so that the operation is continuous and smooth. In addition, since the electrodes can be settled well and need not be folded, there is an advantage that a product having an excellent external shape can be made compactly and inexpensively.

[Brief description of the drawings]

FIG. 1 is a front view of a pulse beauty device equipped with a housing-integrated electrode embodying the present invention.

FIG. 2 is a block diagram of a human body impedance measuring device.

FIG. 3 is an explanatory diagram of a measurement method of a housing-integrated electrode.

FIG. 4 is an explanatory view of a measuring method of another housing-integrated electrode.

FIG. 5 is a block diagram of a pulse power supply.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Control box 12 Cable 2 Human body impedance measuring circuit 21 Oscillator 22 Drive circuit 23 Changeover switch 24 Band filter 25 Rectifier circuit 26 Amplifier 27 A / D converter 28 Switching unit 28 29 Switching control circuit 3 Pulse power supply circuit 31 Reference clock generator 32 D / A converter 33 Pulse generator 34 Current detection circuit 35 A / D converter 36 Current protection circuit 37 Cutoff switch 38 Switching circuit 39 Switching unit 4 CPU 5 Memory 6 I / O interface C connector E electrode P Color liquid crystal panel H Tentacle part S Power switch T External power terminal T1 to T4 Transformer

Claims (1)

[Claims] 1. A four-terminal electrode is formed by providing a pair of electrodes that are electrically insulated from each other on both sides of a housing, and a human body impedance is measured by contacting both hands with the four-terminal electrode. For measuring human body impedance.