JPS59193321A - Small sized balance for physical examination - Google Patents

Abstract

PURPOSE:To obtain a compact balance for physical examination for family use with excellent design character by limiting its size available for accommodating only one foot. CONSTITUTION:When a man rides on a balance for physical examination 3, his weight applied to a pressure sensitive member 11 of detecting block is detected with a detecting circuit 14 and measurement is performed in a constant distance sequence with a measuring circuit 16 through an AD converting circuit 15. When a difference between succeeding data of weight drops down below a predetermined value, a latch signal Pd is emitted from the output terminal Q of variation measuring circuit 17 and the latch circuit 18 displays the final measurement data of the circuit 16 in a displaying member 4 of weight data after latching. A sound-generating circuit 20 excites a buzzer 31 for generation of sound signal and the man subject to measurement, upon heating the sound signal, leaves the balance 3 and watch the measured value displayed by memory on the display member 4.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a weight measuring circuit in a small scale.

As shown in FIG. A space is required to provide the display window 2 for weight data in a position and size that can be seen from the outside, which results in a fairly large overall size and a monotonous design. Because of this, it was considered a nuisance when not in use.

The present invention is intended to solve the above-mentioned drawbacks, and its purpose is to provide a compact weighing scale for home use that is compact and has an excellent design.

The gist of the present invention for achieving the above object is to provide a pressure sensitive part that receives body weight, a detection circuit that converts the displacement of the pressure sensitive part into an electrical signal, and a detection signal of the detection circuit that is measured to obtain body weight data. a measurement circuit that generates a measurement circuit; a change measurement circuit that detects a change between each weight data value generated by the measurement circuit and generates a latch signal when the change becomes less than a predetermined value;
The present invention is characterized in that it includes a display circuit for displaying weight data in accordance with the lunch signal.

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

FIG. 2 shows a small scale according to the present invention,
(a) is a plan view, and (b) is a sectional view of the main part.

6 is a small weight scale, and this scale 6 is like a star-shaped A, so a human can stand on it with one leg. , -1 is formed, and a small weight y-ta display 8] is formed in this recess 6a.
(4 is provided, and there is also a (3, 41 capital 61) for hanging the weight 6 on the wall)'-j'
l', I'm tired.

Figure 3 shows the circuit configuration of 16 for the body weight shown in Figure 2. 1) The body weight is used as an electric quantity 2. A constant weight is applied to the pressure sensitive part 11, etc., based on the body weight it 3'= ゎ-)/, a power switch that turns ON temporarily, and 12. .

The pressure sensing part 11 and 2 change in resistance and resistance depending on the pressure. Pressure part 11
Detection circuit 1 that detects changes in air volume as electrical signals
, 1. Converts the electrical signal detected by the detection circuit 14 into radial data.
) Variable 4 isolation circuit 15o1.1) ra/melke-0)*h
Story-! Rule 1, 2 ('Create a weight pig - 1,' Measuring circuit 16, Ql (1) Measure the change in the weight of 6 bodies created at regular intervals in the old 11111 circuit 16 1-2, the change in value is determined by -r, l, binary, J:
The person becomes smaller at two o'clock.
l-ζ) Change measuring circuit 17, this change measuring circuit t'j
r 17yo1. , ) () 5) flt by lunch month
i 8 [2 old reception 1 circuit 1 do 1 (') body
1t, "r 181・go, 15 notched weight data is displayed on the display section 4 in hl" format. The display drive circuit 19 for the change amount il! II constant circuit 17
I) Input the oscillation signals of the operating acoustic 11 drive circuit 20, base 1' store oscillation circuit 21, and this reference oscillation circuit 21. The clock signal generating circuit 22 is configured to generate a clock signal.

2 is the power supply block and switch]・U・2. ;S," 24 (, hereafter abbreviated as SW ・Tr -r 6
), the switch signals of the power switch 2 and 12 are not pulsed 71. ) Hull, , y, P, circuit 25, l'(,
S 7 S・P7 K1,, B26 (J, 1 after i: i
S −1=” abbreviated as F)), f-mer circuit 2
7. 60 is a battery for power supply, 61
is a buzzer driven by an acoustic driving circuit 2D, and then performs a measuring operation of a small scale 6 having a two-set configuration.
I will clarify. When a person who wants to measure his/her weight (not shown in Fig. 2) steps on the weight board with one foot, first the detection block 100 and the power supply 12 are turned on, and the power is supplied to the power source, the power supply 26, and the measurement button 16. Supplied.

Then, this switch signal is converted into a switch pulse Ps by a pulse circuit 25, and the AD conversion circuit 15, measurement circuit 16, and change amount measurement circuit 17 that constitute the measurement block 16 are converted into a switch pulse Ps.
, at the same time as resetting the latch circuit 18, the timer 2
7 and further set R, S-1” F 26.

In this state, the power supply block 26 is 1 (S-F F
26 is set and the output terminal Q is set to logic 1. As a result, S W -Tr'l 4 becomes conductive, and at the same time, the timer circuit 27 starts the clock signal generation circuit 2.
The operation is started by a clock signal supplied from 2.

Further, each circuit of the measurement block 16 is reset by the switch pulse Ps, and weight measurement starts from the first initial state. That is, the pressure sensitive part 11 of the detection block 02 and 10
The detection circuit 14 detects the weight added to the body as an electric signal, and this electric signal is converted into digital data by the AI conversion circuit 15, and then the weight data is measured at regular intervals by the measurement circuit 16. When measuring weight, when a person steps on a scale, there is a transient change in weight due to the impact force at the moment the person steps on the scale, so the initial measurement value fluctuates greatly, and only after a certain period of time. However, in the present invention, since a stable measurement value cannot be obtained if
11 The weight data created at regular intervals by the circuit 16 is measured by the change measurement circuit 17, and when the difference between successive weight boosters, 1, that is, the amount of change, becomes smaller than a predetermined value. , it is determined that the measured value is stable (...), the latch signal Pd is output from the output terminal A, and the launch circuit 1
8 and the acoustic drive circuit 20.

Thereby, the latch circuit 18 latches the final measurement data of the measurement circuit 16 and displays it on the weight data display section 4 via the display drive circuit 19. On the other hand, the acoustic drive circuit 20 drives the buzzer 31 to generate an acoustic signal to notify that the measurement has ended.

Therefore, when the person weighing the scale 6 hears the acoustic signal after stepping on the scale 6, he or she can get off the scale 6 and view the measured value stored and displayed on the weight data display section 4.

When the person weighing the scale 6 steps down, the power switch 12 is turned off, but as mentioned above, the SW・Tr'l 4 of the power block 26 is in a conductive state, so the power to the measuring block 16 is turned off. continues to be supplied, and weight data continues to be displayed.

This power supply state ends when the operation of the timer 27 ends, a signal is generated at the output terminal Q, the R3-FF 26 is reset, and the 5W-Tr 24 is cut off.

The operating time of the timer 27 is approximately 1 to 2 minutes, taking into account the time required for weight measurement.

Further, the display section 4 may be smaller than the one shown in the drawings, and it may also be located at the tip or side surface.

As described above, according to the present invention, the scale can be made as small as possible within the range that a person can ride on, so it can be used at home and stored at ℃ or hung on the wall when not in use. This not only eliminates the need for wasted storage space, but also makes it possible to actively use it as an interior decoration.Furthermore, if the small scale of the present invention is also used as a wall clock, etc., the effect will be even greater.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a conventional weight scale, Fig. 2 shows a weight scale according to the present invention, Fig. 2 (a) is a plan view, and Fig. 2 (b) is a sectional view of main parts. FIG. 3 is a block diagram showing the circuit configuration of the weight scale shown in FIG. 2. 6... Compact scale, 4... Weight data display section, 10... Detection block, 16...
・Measurement block, 26...Power supply block. Patent applicant Citizen Watch Co., Ltd. Figure 1? Figure 2 (/l) ('O)

Claims (1)

[Claims] A pressure sensitive part that receives body weight, a detection circuit that converts the displacement of the pressure sensitive part into an electrical signal, a measurement circuit that measures the detection signal of the detection circuit and generates weight data, and each weight data value generated by the measurement circuit. The present invention is characterized by comprising a change measurement circuit that detects the amount of change between and generates a latch signal when the amount of change becomes less than a predetermined value, and a display circuit that displays weight data in accordance with the lunch signal. A small weight scale.