JPS58193424A - Electronic body weight meter - Google Patents

Abstract

PURPOSE:To grasp the change of a body weight accurately and readily, by providing a measured value recording memory and a mode switch so that writing and reading of the measured value can be performed. CONSTITUTION:When a foot switch 8, which is provided at the end surface of a lower case 2 of a main body 1 of an electronic body weight meter, is pushed in by a toe, the meter is turned ON. When an indicator part 3, which indicates the measured result, is connected to the main body 1 by a connecting cable 6, the optical encoder of the main body 1 is electrically connected. Thus the measurement is ready. A mode switch 11, which switches the meter into a writing mode, and an execution switch 13 are provided on the same plane of the display 9 of the indicator part 3. A microprocessor, wherein an area in which the measured value is recorded in a memory is provided, is set in the inside. The writing and reading of the measured values are made possible by the operation of the switches 11 and 13.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic weight scale, and more particularly to an electronic weight scale that can store and utilize past measurement results.

Weight scales that display measurement results digitally are on sale in Japan, but the display is simply an electronic digital display instead of a rotating disc, and does not make particularly effective use of electronics technology. It's something that didn't exist.

That is, for example, after the body weight is mechanically changed in position using a spring, on a digital scale, this is converted into an analog electrical quantity using a sensor such as a differential transformer, and then A/D (analog/digital) conversion is performed. , which drives a 7-segment display, but costs more than mechanical weighing scales.

In view of the above, the present invention was developed focusing on the fact that an IC (integrated circuit) for recording and reproducing data after Al1) conversion is cheaper in cost than an analog part and can be easily realized technically. The object of the present invention is to provide an electronic weighing scale that stores past measured values and can be recalled when necessary.

It should be noted that only one measurement comparison in the past shows that before meals 2
Although changes in body weight cannot be accurately determined due to increases and decreases after meals, by recording at least two times, it is possible to easily understand changes in body weight.

A feature of the present invention is that an electronic weighing scale that digitally displays measured values is provided with a read/write mode changeover switch and an execution switch on the same surface as the display, and the measurement value is stored in the memory. The electronic weighing scale is equipped with a microprocessor provided with an area for recording values, and configured so that measured values can be written and read by operating the two switches described above.

In detail, calendar counting and past data are always held using an IC with low power consumption such as C-MO8IC, and if necessary, the results of two or more past weight measurements can be displayed by key operation. This relates to an electronic weight scale with a digital display that adds effective measurement functions with low power consumption.In order to perform the above functions, two switches for recording and reproducing measurement results are installed on the display panel. The memory section of the microprocessor is provided with an area for storing past information on two or more measurements, so that past measurement results can be viewed.

Next, embodiments according to the present invention will be described with reference to the respective figures.

Here, FIG. 1 is an external perspective view of an electronic weighing scale according to an embodiment of the present invention, and FIG. 2 is a block diagram of its operating circuit.
Fig. 3 is a schematic explanatory diagram for understanding the storage of measured values and measurement dates in the memory section of the microprocessor, and Figs. 4 to 8 are flowcharts of the microprocessor. .

First, explanation will be given based on FIGS. 1 to 3.

1 is the main body of the electronic scale, IA is the upper case related to the treadle (hereinafter referred to as the treadle), and 2 is the lower case of the main body. For this purpose, a well-known four-bar linkage and an opto-encoder (0, E,) 16, which will be described later, are incorporated in place of the mechanical scale plate.

Reference numeral 3 denotes an indicator section for displaying measurement results, which in this embodiment is separated from the main body 1 and placed in an independent case in order to facilitate key operations.

4a and 4b are engaging claws that engage the main body 1 and the indicator part 3, and when the indicator part 3 is not attached to a shelf or wall, these can be engaged with the main body 1 and integrated. Reed 5 is a hole for hanging the indicator part 3 on a wall or the like.

6 is a connection cable that electrically connects the output of the opto encoder 16 of the main body 1 to the electronic circuit section in the indicator section 3; 7 is a plug on the main body side at the tip of the connection cable 6; When inserted into the main body receptacle, weight measurement becomes possible.

8 is a hook provided on the end surface of the lower case 2 of the main body.

Toswitch (8W2), O by kicking with the tip of the foot
It is recommended to do N.

10 is a 3-state slide switch (8W1) provided on the left end of the top surface of the indicator section 3, and its three positions correspond to "month/day setting", "rKg display", and "Lb (pound) display". It is.

11.12.13 is a key switch provided independently on the upper surface of the indicator section 3, and the key switch 1iSW3
) is related to the read/write mode changeover switch, key switch 12 (8W4) is related to the personal specification switch, and key switch 13 (8W
5) relates to the execution switch.

Therefore, inside the indicator section 3, the above-mentioned display 9, slide switch 10, key switch 11,
A circuit board (not shown) on which 12.13 is mounted and an alkaline manganese battery for power supply (also not shown) are housed.

14 and 15 are indicator lights (LMI, LM
In 2), the indicator light 14 indicates that the device related to the electronic weight scale is in a writable state, and the indicator light 15 indicates that the device is in a memory read mode.

As mentioned above, 16 is an opto-encoder (0, E,) built into the main body 1, and includes two pairs of photo-interrupters;
Although it consists of a rotating disk, its configuration is not directly related to the present invention, so detailed explanation thereof will be omitted.

17 is a 4Bit-C-M which is also mounted on the previously mentioned circuit board (not shown) on which the display 9 and the like are mounted.
Under the OS microcomputer full microprocessor, MPU
That's what it means. ).

The microcomputer associated with this MPU 17 has a calendar function that operates at all times while the power battery is inserted, and calculations for determining the shell weight, as well as calculations for determining the three past measurements as shown in Figure 3. It has a register that constantly stores five sets of such measurement records linked to dates.

That is, PI-P5 in FIG. 3 is a register group corresponding to the personal code designated by the key switch 12 related to the personal designation switch.

The reference numeral 1001 in the figure is a recording date storage register that stores the date on which the latest measurement of the personal code °°1'' was recorded, and the reference numeral 1002 is a measurement result actual storage register at that time.

In addition, 1003 is the recording date memory register 10 of the previous recording date.
Reference numeral 05 indicates a previous recording date storage register, which has measurement result actual storage registers 1004 and 1006, respectively.

These register groups are provided in the RAM (Random Access Memory) in the MPU 17 of the C-MOS microcontroller mentioned above, and are always energized while the battery is stored in the device, even when not displaying or measuring. ,
It is designed to retain memory.

Next, the sequence of the MPU 17 will be explained with reference to flowcharts shown in FIGS. 4 to 8.

Therefore, in the flowcharts of FIGS. 4 to 8, the symbols ■, ■...■ attached to the sides of each block in those charts indicate the number of each step, and will be referred to below as follows. The steps are simply indicated by ■, ■...O.

The MPU 17 masks interrupts by turning on electricity, performs initial settings, and then waits for an interrupt.

This is to reduce the power consumption of the MPU 17, and the main program continues in the standby state. The interwoven program in the standby state is to check the switches 10 to 13 and the foot switch 8, and to update the date (calendar), as shown in FIG.

The standby program first checks the position of the slide switch 10 related to SW1, that is, the three-contact switch for month/date setting/Kg-Lb switching at step (3).

When the slide switch 10 is in the month/day setting position, the month/day setting routine O in FIG. 5 is executed. When the slide switch 10 is set to Kg or Lb, ■
Check SW2, that is, 0N-OFF of foot switch 8, and if it is ON, execute the weight measurement routine O in Figure 6, and if it is OFF, check rsW3 in ■.
That is, the key switch 11 related to mode switching is checked. When the key switch 11 for mode change is turned on, the memory reading routine O shown in FIG. 7 is executed, and when it is turned off, the calendar is updated in step 2 and looped back to the original position.

The month and date setting program O shown in FIG.
WI) is set to the "month/day setting" position, display 9 shows the month in the 1000th and 100th digits, and the day in the 10th place.
Display in the first and first digits (O).

The display is ``oo-oo'', and when the key switch 11 (SW3) for mode switching is turned on at ■, the month is counted up.When it exceeds 12, it returns to 1 and continues counting up.

At (2), SW4, ie, the key switch 12 related to personal code designation, is checked, and if there is a signal, the day display is counted up. When the date exceeds 31, it returns to 1 and repeats the count-up.

Furthermore, by checking SW5 of O, that is, the key switch 13 related to the execution switch, when the key switch 13 is pressed and a signal is input, the month and day displayed on the display 9 are set to the @ calendar, and at the same time the ``'' is displayed. In place of the month and day display on device 9, the time is displayed at the 1ooo and 100th places (O
). With @, the SW3, ie, the key switch 11 related to mode switching, is checked again, and if it is ON, the time on the display 9 is updated with O. Check SW5 (key switch 13 related to the execution switch) at (3), and if it is ON, set the time displayed on the display 9 in the calendar (O).

The time is set as a 24 hour timer.

When the slide switch 1o is set to Kg or Lb, the display on the display 9 disappears, and the interactive mode is ended with ■ and the process returns to the main routine.

Also, check the signal of the foot switch 8 (SW2) in the previous step (■).

When the slide switch 10 is in the "Kg" position, O
The Kg calculation program of O is set, and when it is in the "L b" position, the I, b calculation program of O is set.

Then, at ■, a timer that determines the lighting time of the display 9 is started.

O performs calculations based on the selected O's Kgz or O's I and b from the output of the opto-encoder 16, performs halt processing, and displays the result on the display 9 as O.

Next, press O to check O related to the timer and keep the display until a predetermined time, but after the predetermined time (approximately 20 seconds), to prevent the display 9 from draining the battery, press ■ to turn off the display 9.
, and return to the main routine with ■.

Furthermore, the program ○ related to calling and recording of measurement results shown in FIG. 7 is called by ■ in FIG.
The personal code number is displayed on the indicator light 15 of the LM2 lamp, which means "AD", and on the 100th digit of the display 9 (■).

The personal code number is P1 of the register group shown in Figure 3.
It is a number from 1 to 5 corresponding to ~P5, and "1" is initially displayed. At O, SW3 is checked again, and when it is ON, the writing program @ shown in Fig. 8 is called, but when SW3, that is, the mode change key switch 11 is pressed again, the CH switch 12) is checked at @,
If there is a signal, press ■ to count up the personal code number, and press ■ to display the numerical value on the display 9. When the number of personal codes reaches 5, it returns to 1 at the next signal and repeats the count-up.

■8W5 (key switch 13 related to execution switch)
When there is a signal, set the counter I to 1 at O, and check the recent measurement date of the relevant personal code.For example, if the personal code is 1, it is 1001.13) When the signal is received, the month on the display 9 will be displayed. Measurement result 1 with O instead of day display
002 is displayed.

After displaying the weight 1006 from the previous time, the program returns to the SW5 routine from @.

In the case of writing, the indicator light 14 of the LMI lamp, which indicates that the device is in the writing state, is turned on at O in FIG. Check SW4 (key switch 12 related to the personal code specified by the individual) at O, and if there is a signal, add 1 to the personal code number and display it on the display 9 with @. S in ()
Check W5 (key switch 13 related to the execution switch), and if there is a signal, check with @ to see if the measured value to be recorded has been halted O in Figure 6, and if it is , the measured value is stored at O in the newest recording position of the corresponding personal code. In personal code 1, the measured value held in 1002 is stored, and at the same time, the data previously stored in 1002 is transferred to 1004, and the data stored in 1004 is further transferred to 1006. . The contents of register 1006 are flushed out. The measurement date data is also shifted at the same time, and the calendar information when halted at O is set to 1001.
The data of 1001H is stored in 1003, and the data of 1001H is stored in 1003.
The data is transferred to each register 1005.

In order to inform the user that the transfer has been completed and the date and value of the measurement have been reliably recorded, @ is used to display the month and date for 1 second, then after 1 second of erasure, the display 9 The measured value will be displayed for 1 second, and then the screen will return.

When there is no halted measured value, the indicator light 14 associated with the LM1 lamp blinks for a predetermined period of time in (■). In addition to recording past measured values in the memory of the microprocessor, the user can view them by key operation, making it easy to understand changes in one's own weight.

In addition, your weight may increase or decrease before and after meals, so it is not possible to clearly understand your weight trends just by comparing the previous time and the current time.
By recording at least two times in the past, it is possible to grasp the trend of increase or decrease more accurately.

Furthermore, in the electronic weighing scale according to this embodiment, the microprocessor associated with the C-MOS microcomputer is always on standby, and weight measurement, recording, and playback are performed by intermittent interrupt processing, so that the main program is constantly executed. This method can reduce battery consumption compared to methods that involve

In summary, the present invention provides an electronic weight scale that can store past body weight measurement results and utilize them effectively.
This invention can be said to have excellent effects on health management.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view of an electronic scale according to an embodiment of the present invention, FIG. 2 is a block diagram of its operating circuit, and FIG. 3 is a diagram showing measured values and measurement dates in the memory section of the microprocessor. A schematic explanatory diagram of the container for understanding the storage of
4 through 8 are flowcharts of the microprocessor. 1...Main body, IA...Main body upper case, 3...Indicator part, Death...Foot switch, 9...Display device,
10...Slide switch, 11,12.13...
Key switch, 14.15...Indicator light, 16...Optoenco j 12th #! 4 eyes 6 eyes 7 eyes

Claims (1)

[Claims] 1. In an electronic weight scale that digitally displays measured values, a read/write mode changeover switch and an execution switch are provided on the same surface as the display, and the memory 1. An electronic weighing scale comprising: a microprocessor having an area for recording measured values; and configured such that measured values can be written and read by operating the two switches. 2. An electronic weighing scale according to claim 1, wherein the microprocessor is provided with two or more memory areas for storing and reproducing the results of two or more past measurements. . 3. In the item described in claim 1, a personal code designation switch is provided on the same surface as the display, and two or more memory areas corresponding to the personal codes are provided in the memory of the microprocessor, An electronic weight scale configured to record and reproduce two or more independent measurement results specified by individual codes.