JPS5923362B2 - electronic scale - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electronic scale, which can be used not only as a normal calculator but also as a measuring instrument, and can directly process measured values electronically and display them digitally. , an electronic type that can perform various calculations by feeding this measured value to a calculator, and further improves operability by automatically clearing the contents of the display before or after measurement just by the person taking out the tape measure. It's about scale.

Conventionally, in order to measure a certain distance, it is common to read a scale provided on a tape measure, index finger, or the like.

However, these scales have become hard to read after years of use, and are difficult to read quickly. The present invention has been made in view of these drawbacks, and is particularly capable of being used as a normal calculator, and also as a measuring instrument, in which measured values are processed electronically and displayed digitally. The purpose of this invention is to provide an electronic scale that can perform various calculations by feeding this measured value to a computer. Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing an embodiment of an electronic scale according to the present invention.

In the figure, a main body 1 has a keyboard 2 provided with a group of human-powered keys related to religion or calculations used when this device is used as a calculator, and a recess 3a in a part of the peripheral surface. A roller 3 whose peripheral surface is slightly protruded and is rotatable around a shaft 3b, and a recessed portion 3a of this roller 3.
For example, the contact is turned off when the device is stuck in the recess 3a, and the contact is turned on when it is in contact with the roller circumferential surface other than the recess 3a.If the device is used as a calculator, the religious calculation contents are displayed, and the device When used as a measuring instrument, it is comprised of a display device 5 that displays the measured values.

A circuit block diagram for operating this device as a range finder is shown in FIG.

FIG. 3 is a time chart of the circuit. 2 points A, B
When measuring the distance between the two points, the roller 3 is rotated between the two points A and B.

When the roller 3 rotates by a unit distance, that is, one rotation of the roller, the switch 4 temporarily closes the recess 3 every time the roller 3 rotates by a unit distance.
aVCV3 gets stuck and the contacts turn on and off. By turning on and off the four switch contacts, a pulse wave as shown at time to in FIG. 3b is obtained. Here, a circuit for generating pulse waves caused by turning on and off the switch 4 is not shown. Now, depending on the off period of the contact of switch 4, the pulse width becomes time T=TO.
A case will be described in which the rotational movement of the roller 3 by a unit distance is detected using the input coupler shift determined as -T3, and the rotational movement distance of the roller 3 is displayed by adding it to the distance already rotated. If roller 3 has already moved 4 revolutions from the initial distance measurement position, then register R, which has multiple digits and each digit consists of 4 bits, will contain 4 bits, which means that roller 3 has made 4 revolutions. The coded information 0100 consisting of the following code is stored in circulation.

Next, when the input pulse wave is guided to the OR gate G1 at time TO (that is, when the roller 3 has completed 5 revolutions), the pulse wave is transmitted via the OR gate G to the clock signal φc (the figure As shown in h, the delay type flip-flop Q1 is synchronized with the input capacitor (having a period smaller than the input coupler width).

The flip-flop Q1 is set at time T by the conductor of this pulse wave to generate a set output pulse wave. Flip-flop Q2 connected to the subsequent stage of flip-flop Q is set with a further delay of one clock signal φc due to this pulse lock.

(Output waveform not shown). The set output of flip-flop Q1 and the set output of flip-flop Q2 via inverter 1 are conducted to AND gate G2.

Therefore, the output waveform of AND gate G2 is at time t in d in the figure.
The pulses are as shown in 1 to T2. Clock signal φc
The output of the pulse generator PG, which generates pulses with the same period as shown in the figure e, the input coupler S, and the AND gate G2.
If the generation time of the output pulse C coincides with that of the output pulse C, the AND gate G3 gate-controls its output and outputs a pulse N as shown at time t1 in FIG.

Since this pulse 2 is a pulse generated when the roller 3 rotates once, this pulse is used as a pulse for distance measurement.

Here, pulse 2 has the same waveform as the output pulse of the pulse generator PG, but the output pulse of the pulse generator PG has a pulse width equivalent to one digit of register R, that is, one pit out of four pits. Therefore, when this pulse is expressed as coded information, it becomes a pulse that constitutes the coded information of 0001.

In addition, the full adder FAVC has already received the output of the register R, that is, coded information 0100, at regular intervals, and the output of the register R is sent to the full adder FA from the gate G3 in accordance with the timing when the output is sent to the full adder FA. The information containing the pulse number, ie, the coded information 0001 shown above, is derived.

Therefore, coded information 0001 is added to coded information 0100 by adder FA.

As a result, the register R stores coded information 0101 in a circular manner, and a binary-decimal converter (not shown) is used.
The number 5 is displayed on the display device D via.

That is, if the roller 3 rotates 5 times and one revolution is 1 cm, it can be seen that the roller 3 is located 5 cm from its initial position.

The clear switch SW is a switch that clears the contents of the register R, and when it is turned on, it turns off the AND gate G5 via the nut gate G4, so that the register R cannot circulate its own contents and its contents are cleared.

By the way, the number of recesses 3a provided in the roller 3 was only one, but if multiple recesses are provided, the accuracy of off-shore distance can be improved. It is also possible to detect the rotation of the roller using a photoelectric conversion device, such as a photocoupler that reads the holes, and measure the distance using the detection output.

FIG. 4 is a diagram showing another embodiment of the electronic scale of the present invention. As shown in the figure, the electronic scale body 1 includes a keyboard 2 for inputting information, a display 5 for displaying the input information, and an electronic tape measure 6. The tape measure 6 is arranged at predetermined intervals in the length direction. A marking means is provided, a mark detection means for detecting a mark depending on whether it is pulled out or stored, and a clearing means for clearing the contents of the display 5 before or after measurement, and the tape measure is moved based on a signal from the mark detection means. A value corresponding to the amount can be displayed on the display 5.

The input information from the keyboard 2 and tape measure 6 is switched and displayed on the display 5, respectively. That is, the tip of the tape measure 6 is bent to form a hook c, and when the hook c is hooked on, for example, one point between two points where the distance is to be measured, and the main body 1 is moved to the other point. A strip d made of metal or opaque resin thinner than the main body 1 is pulled out. This strip-shaped body d has small holes A, a,
...Alternatively, marking means such as transparent resin are sequentially provided, and furthermore, a clear signal hole b for clearing the contents of the display 5 before measurement is bored in the vicinity of the hook c.
That is, this device sequentially counts the small holes A, a, . Distance can be measured by In this way, the electronic scale of the present invention can be implemented as an electronic desktop calculator or as a measuring instrument.

As explained above, the electronic scale of the present invention provides the following special effects.

(1) It can be used as an electronic desktop calculator and an electronic tape measure.

(1i) When used as an electronic tape measure, the amount of movement of the tape measure can be directly displayed digitally, making length measurement and reading extremely easy.

(111) The measurement efficiency is extremely high because the 1j value of the electronic tape measure is electrically processed and the measured value is given to an electronic desktop calculator to perform various calculations.

Co., Ltd. Since the contents of the display can be automatically cleared before or after measurement, erroneous measurements can be eliminated, accurate measurements can be made, and the trouble of having to clear the information each time can be eliminated.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of an electronic scale according to the present invention, and FIG. 2 is a circuit block diagram for operating the scale.
FIG. 3 is a time chart of the same circuit block, and FIG. 4 is a diagram showing another embodiment of the electronic scale according to the present invention. In the figure, 1... Main body, 2... Keyboard, 5... Display, 6... Tape measure.

Claims (1)

[Claims] 1. An electronic scale that includes a keyboard for inputting information, a display for displaying the input information, and an electronic tape measure, the tape measure being a measurement scale provided at predetermined intervals in the length direction. a marking means, a mark detecting means comprising a display clearing marking means provided at the tip of the tape measure, and for distinguishing and detecting the measurement mark and the display clearing mark according to the insertion and removal of the tape measure, and the measurement mark; means for displaying a value corresponding to the amount of movement of the tape measure on the display based on the detection signal of the display clearing mark, and clearing the display contents of the display based on the detection signal of the display clearing mark; the keyboard and the tape measure; 1. An electronic scale characterized by comprising means for switching input information from and displaying the input information on the display.