JPS6433623U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a perspective view and a schematic diagram of a battery-powered electronic scale as an embodiment of this invention, Fig. 2 is a block diagram of the embodiment of Fig. 1, and Fig. 3 shows details of the oscillation circuit of Fig. 1. The circuit diagram shown in Figure 4 is a timing chart diagram.
FIG. 5 is a perspective view of a conventional battery-powered electronic scale, and FIG. 6 is a block diagram of a conventional battery-powered electronic scale. 3... Power switch, 6... Variable capacitor, 81... Oscillation circuit, 83... Counter, 84
...Microprocessor, 85...Dry battery.

Claims (1)

[Claims for Utility Model Registration] 1. The weight of an object is measured based on the frequency from an oscillation circuit that uses a battery as a power source and incorporates a variable capacitor whose capacitance changes depending on the load. A battery-operated electronic scale characterized in that the electronic scale includes a counter that counts the frequency from the oscillation circuit, and an arithmetic processing device that performs predetermined arithmetic operations based on the output signal from the counter and measures the weight of an object. . 2. The battery-operated electronic scale according to claim 1 of the above-mentioned utility model registration claim, wherein the arithmetic processing device measures the weight based on the difference between the output signals from the counter before and after the object to be measured is loaded. . 3. The battery-powered electronic scale according to claim 1 or 2 of the above utility model registration claim, wherein the power source is a solar cell and a secondary battery connected together. 4. The battery-powered electronic scale according to claim 1 or 2 of the above utility model registration claim, wherein the oscillation circuit is connected to a solar cell.