JP3083160U - Body fat measuring instrument - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a body fat measuring device capable of accurately measuring the amount of body fat. SOLUTION: A display 11, a CPU electrically connected to the display, a power switch 12 separately provided on both sides of the display 11, an upper adjustment key 13, a lower adjustment key 14, and a select key 15 are provided. It consists of. The user places his or her thumb or index finger on each of the electrodes, thereby forming four circuits between the electrodes. The calculation of the CPU removes the resistance generated between the fingers, and calculates the accurate resistance of the human body so that the resistance of the human body is not affected by the dry humidity and roughness of the fingers and the size of the contact area with the electrodes, As a result, a value approximate to the actual body fat mass can be measured.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a body fat measuring device.

[0002]

[Prior art]

 As a conventional body fat meter, there is a body fat meter disclosed in Taiwanese Patent No. 366277. This body fat meter has two pairs of electrodes, and when these two pairs of electrodes are pressed with the fingers of both hands, the electrodes 1a forming a current circuit of the first pair of electrodes therein as shown in FIG. And the electrode 2a forming the current circuit of the second pair of electrodes respectively form a circuit through the human body. Subsequently, in the circuit of the measuring electrode 16 of the first pair of electrodes, the current decreases as time elapses, so the change in the voltage is measured to calculate the resistance, and the obtained resistance value is transmitted to the CPU. It is configured so that it is calculated by the calculation formula, and the fat mass of the human body is obtained as a result.

[0003]

[Problems to be solved by the invention]

 However, the above-mentioned conventional body fat meter is not very ideal for practical use, and the main reason is that the measured fat value is affected by the dry humidity and roughness of the fingers and the size of the contact area with each electrode. It is to be. Therefore, there is a problem that there is a great difference between the measured amount of body fat and the actual amount of body fat. Therefore, an object of the present invention is to provide a body fat measuring device capable of measuring a value approximate to the actual body fat mass.

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned problem, the body fat measuring device according to the present invention has two pairs of electrodes, and all of the two contact points of these electrodes are electrodes forming a current circuit to be a measuring electrode. Four circuits are formed between each electrode, and the resistance generated between the fingers is removed by the operation of the CPU, so that the resistance of the human body is not affected by the dry humidity and roughness of the fingers and the size of the contact area with the electrodes. By doing so you will calculate the exact human resistance. As a result, a value approximate to the actual body fat mass can be easily measured.

[0005]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, FIG. 2 and FIG. 4, the body fat measuring device according to the first embodiment of the present invention comprises a display 11 (LCD display) installed on the surface of the outer shell 1 and an electric connection between the display 11 and the display. A central processing unit (CPU 4), a power switch 12 provided separately on both sides of the display 11, an upper adjustment key 13, a lower adjustment key 14, and a select key 15 of a module to be set. Is done. The power is switched by the power switch 12, and the power is supplied to or cut off from the CPU 4 by adjusting the power supply 5 (power supply). The required data of the body, such as height and weight, is selected by the select key 15 and input by the upper adjustment key 13 and the lower adjustment key 14, and is temporarily stored in the memory 6 of the CPU 4.

Then, as shown in FIG. 3, two pairs of electrodes 2, 3 are provided at appropriate positions in the outer shell 1, and the respective electrodes 2 a, 2 b, 3 a, 3 b of the two pairs of electrodes 2, 3 are provided. Has already formed the electrodes in the current circuit. That is, they are measuring electrodes, and the user places thumbs and forefingers of both hands on the electrodes 2a, 2b, 3a, 3b, respectively, and places these fingers and body between the electrodes 2a, 2b, 3a, 3b. Measure the resistance of These resistance values are transmitted to the CPU 4, and the CPU 4 calculates by the set operation program. Here, the small contact resistance between the right thumb and the electrode 2a is r1, the resistance of the right thumb is R1, the small contact resistance between the other right finger and the electrode 2b is r2, and the resistance of this finger is R2. The small contact resistance between the left thumb and the electrode 3a is r3, the resistance of the left thumb is R3, the small contact resistance between the other finger of the left hand and the electrode 3b is r4, and the resistance of this finger is R4. , last in the resistance of the body and R _B. Subsequently, the resistor r1 and the resistor R1 and connected to one and a resistor R _L1, the the resistor r2 resistor R2 and connected to one and a resistor R _L2, a resistor r3 and a resistor R3 coupled to one The resistor R _R1 is connected to the resistor R4 and the resistor R4 to form a resistor R _R2 .

Here, one circuit is formed between the electrodes 2a and 2b with the right thumb and the other right finger, and one circuit is formed between the electrodes 3a and 3b with the left thumb and the other left finger. In addition, a circuit is formed between the right thumb and the body other than the left thumb through the electrodes 2a and 3b, and a finger other than the right thumb and the left hand through the body between the electrodes 2b and 3a. The following formula can be obtained by forming a circuit with the thumb of the child. (1) r1 + R1 + r2 + R2 (2) r3 + R3 + r4 + R4 (3) r1 + R1 + R B + r4 + R4 (4) r2 + R2 + a R _B + r3 + R3 above formula simplifies as follows. _{(1) R L1 + R L2} (2) R R1 + R R2 (3) R L1 + R B + R R2 (4) R L2 + R B + R R1 further {(3) + (4) - (1) - (2)} / R _B value is obtained by the second equation. That This equation becomes _{(R L1 + R B + R} L2 + R B + R R1 -R L1 -R L2 -R R1 -R R2) / 2 = 2R B / 2 = R B.

In the present invention, each electrode contact already forming an electrode of the current circuit is used as a means of measurement. The electrodes 2a, 2b, 3a, 3b of the two pairs of electrodes 2 and 3 are all crossed to form a circuit, and then the various resistances obtained by the measurement are transmitted to the CPU 4, and the above calculation formula is used. in calculated, the human resistance i.e. R _B value accurately obtained, can result easily calculate the exact amount of fat.

Next, FIG. 5 shows another example of the electric circuit of the first embodiment of the present invention, showing the resistance of each contact forming an electrode. A resistor Rx is connected between the outer shell 1 and two pairs of electrodes 7 (7a and 7b) and 8 (8a and 8b) provided in the outer shell, and a resistance Rx between the electrodes 8a and 8b. To form Thus, when the thumbs of both hands and the other fingers (for example, the index finger) press the electrodes 7a, 7b, 8a, 8b, respectively, resistance of the fingers and body is obtained between the fingers and the electrodes 7a, 7b, 8b. Can be Here, the small contact resistance between the right thumb and the electrode 7a is r5, the resistance of the right thumb is R5, the small contact resistance between the other right finger and the electrode 7b is r6, and the resistance of this finger is r6. was a R6, contact small resistance between the left-hand other than thumb finger and the electrode 8b and r7, the resistance of the finger and R7, finally the resistance of the body and R _B. Followed by r5 and R5 are connected to one and R _L1, and R _L2 are connected to one r6 and R6, and R _R2 linked to one r7 and R7. Thus, a circuit is formed between the electrodes 7a and 7b via the right thumb and the fingers outside the same, and a circuit is formed between the electrodes 8a and 8b via the left thumb and the fingers outside the same. A circuit is formed between the electrodes 7a and 8b from the right thumb through the body through the fingers other than the left thumb, and between the electrodes 7b and 8b, the fingers other than the right thumb, the body and the left hand are formed. One circuit is formed via the finger and the thumb, and the following formula is obtained from the above circuit. (1) r5 + R5 + r6 + R6 (2) r5 + R5 + R B + r7 + R7 (3) r6 + R6 + R B + r7 + R7 + R X (4) is R _X also these formulas becomes simple formula as follows. _{(1) R L1 + R L2} (2) R L1 + R B + R L2 (3) R L2 + R B + R R2 + R X (4) R X The {(2) + (3) - (1) - (4)} The following equation is obtained from the equation of / 2. _R2 Default value for R in the _{(R L1 + R B + R} R2 + R L2 + R B + R X -R L1 -R L2 -R X) / 2 = 2R B + 2R R2 / 2 = R B + R R2 also CPU4 set is a result from the above mathematical operation formula (R _B + R _R2) minus refers to R _R2 value R _B value is obtained.

Further, the body fat measuring device of the present invention can be manufactured in the form of a weight scale as shown in FIG. 6 as a second embodiment. Then, the outer shell 1, the display 11 installed on the outer shell 1, the power switch 12, the upper adjustment key 13, the lower adjustment key 14, and the select key 15 for selecting a setting module are installed. Then, the user stands on the main body 11 and the clocked weight data is immediately transmitted to the CPU 4, and other necessary data that cannot be weighed are selected by the up / down adjustment keys 13 and 14 and set and input by the select key 15. . Then, after any two points on the back side of both feet and the electrodes 2a and 2b (7a and 7b) and 3a and 3b (8a and 8b) come into contact, a circuit is formed, and the resistance R _{B of} the body is calculated, and the CPU 4 is calculated. By calculating, the body fat mass is calculated.

[0011] The body fat measuring device of the present invention eliminates the contact resistance generated by the finger-electrode contact and the finger resistance by calculating the connection method of two pairs of electrodes and the calculation formula, thereby obtaining an accurate body fat. since the resistance R _B value is obtained, without being affected by the size of the contact area between dry and wet degree and rough degree of finger can be out weighed fat mass.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a top side of a body fat measuring device according to a first embodiment of the present invention.

FIG. 2 is a schematic view showing a bottom side of the body fat measuring device according to the first embodiment of the present invention;

FIG. 3 is a schematic diagram showing an electric circuit of the body fat measuring device according to the first embodiment of the present invention;

FIG. 4 is a block diagram illustrating a body fat measuring device according to a first embodiment of the present invention.

FIG. 5 is a schematic diagram showing a modification of an electric circuit of the body fat meter according to the first embodiment of the present invention;

FIG. 6 is a top view of the body fat measuring device according to the second embodiment of the present invention.

FIG. 7 is a schematic diagram showing an electric circuit of a conventional body fat meter.

[Explanation of symbols]

 1 outer shell 2 electrode pair 2a electrode 2b electrode 3 electrode pair 3a electrode 3b electrode 4 CPU 5 power supply 6 memory 7 electrode pair 7a electrode 7b electrode 8 electrode pair 8a electrode 8b electrode 11 display 12 power switch 13 upper adjustment key 14 lower Adjustment key 15 Select key

Claims (3)

[Utility model registration claims] 1. An outer shell, a plurality of keys installed on the outer shell for inputting predetermined data, a display for displaying the predetermined data and a result after weighing, and a method for temporarily storing the predetermined data. CPU with memory stored in memory
And four electrodes installed on the outer shell, the electrodes being in direct contact with the thumb and other fingers of both hands of the user, and data obtained from the electrodes were transmitted to the CPU. Later, calculated by the calculation program, the four electrodes form electrodes in the current circuit and function as measuring electrodes, and when the electrodes are pressed by the thumb and other fingers of both hands of the user, the four electrodes are interposed. Four circuits are formed between the right thumb and the other right finger, between the left thumb and the other left finger, the right thumb and the left hand via the body. Each of the obtained resistances is transmitted to the CPU through the other fingers of the right hand and between the other fingers of the right hand and the thumb of the left hand via the body, and is calculated. Obtain an accurate _B value and measure the exact amount of fat A body fat measuring device characterized by the following. 2. A main body, a plurality of keys installed on the main body for inputting predetermined data, a display on which the predetermined data and a weighing result are displayed, and the predetermined data are temporarily stored. It is composed of a CPU having a memory and four electrodes installed on the main body, each of which is in direct contact with both thumbs and other fingers of a user, and the obtained data is transmitted to the CPU. be post-calculated, as a pair of resistors R _X is connected between the electrodes, to form a imaginary contact to one of the electrodes of which the electrode forms an electrode in each current circuit metering electrodes formed from the electrode When the electrodes are pressed by the thumb and other fingers of both hands of the user, four circuits are formed between the four electrodes, and the four circuits are connected to the right thumb and the other right finger. Between Between the left thumb and the other left finger, between the right thumb and the other body through the body, and between the other finger of the right hand and the body through the left thumb and by a respective resistance obtained is calculated transmitted to the CPU, the accurately obtain the resistance R _B value of the body, the body fat measuring instruments and calculates the exact amount of fat. 3. The body according to claim 1, wherein the body weighs the resistance R _B value of the lower body, and the CPU calculates an accurate body fat value. Fat measuring instrument.