JPS5837588B2 - Denshikiki - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic device equipped with a printing device, and particularly to one in which the printing portion has a function of recording the number of calculations.

For electronic desktop calculators, electronic cash registers, and the like, devices have been proposed that have a function of automatically checking the number of calculations.

This device later verifies the number of calculations and the number of input data to confirm the accuracy of the operation.

In conventional devices of this kind, an item counter that counts the number of key operations to derive a calculation result is installed in the electronic device, and at the end of a predetermined operation, the contents of this item counter are derived and converted into a decimal number. Instead, a system is adopted in which the number of calculations is printed along with some symbol.

However, item counters usually have three or more digits, and in order to print the contents by key operation, it is necessary to memorize this number as a decimal number and perform decimal addition and subtraction, as described above, and a 12-bit register. In addition to this, a circuit is required to enable addition and printing in some form.

Therefore, the circuit that constitutes the item counter becomes extremely complex, and the price of the device becomes high.

The present invention has been made in view of this problem, and it is an object of the present invention to provide a device that automatically checks the number of calculations with a simple configuration.

The device of the present invention that achieves this purpose employs a method of counting the number of specific key operations and checking the number of calculations, similar to the conventional device described above. In a printing device that prints out calculation results for each calculation operation, the number of calculations is recorded by feeding the recording paper, for example, one extra line.

As a result, a space for one line is entered on the recording paper for every 10 times a specific key is operated, and the number of calculations can be easily checked by looking at the recording paper.

According to the device of the present invention, there is no need to print out the number of calculations, so in the counter that checks the number of calculations, there is no need to convert the contents of the counter into a decimal number or the like to control the printing control circuit. The configuration is extremely simple.

The apparatus of the present invention will be described in detail below with reference to examples.

FIG. 1 is a block diagram of an apparatus according to an embodiment of the present invention.

First, in the drawing, reference numeral 1 denotes a shift register, which is controlled by a pulse generator 3 that issues a 1-bit right shift command for each operation of a specific operation key 2, such as a rotor, and controls the number of operations of key 2. Count.

4 is an OR gate, which is a signal P when the device is powered on.
ON or depending on the feed command ◆F of the printing device,
Set the contents of shift register 1 to the initial state.

Reference numeral 5 denotes a printing control circuit which receives the signal of the least significant bit of the shift register 1 and sends a feed command ◆F to the printing device 6.

In this device, shift register 1 uses 10 digits, and P. The configuration is such that the state is set to 100...0 depending on the ON signal or the feed command ◆F.

At this time, the pulse generator 3
issues a 1-bit right shift command to the shift register 1, so the contents of the shift register 1 become OO...01 after 10 key operations.

The print control circuit 5 detects this and issues a feed command ◆F to the printing device 6, so the recording paper is fed one extra line.
Automatically records 10 operations of 4F-2. FIG. 2 shows an embodiment of such recording paper, and the shaded area T is a one-line margin, which is a feature of the apparatus of the present invention.

In addition, in the apparatus shown in FIG. 1, when the print control circuit 5 issues the feed command ◆F, the OR gate 4 opens, outputs a signal to set the shift register 1 to the initial state of 100...0, and restarts the operation again. Prepare to count the next number of key presses.

Furthermore, when the calculation is completed within 10 times, the shift register 1 is moved to the next P. The ON signal similarly sets the initial state of 100...0 to prepare for a new count.

FIG. 3 shows another embodiment of the apparatus of the present invention, and its feature is that the circuit at the previous stage up to issuing the feed command to the print control circuit 5 is a 4-bit pure binary counter 8, a determination circuit 9, and a The point is that the subtractor 10 is used.

In this device, as in the embodiment shown in FIG. 1, the pure binary counter 8 is P. It is set to the initial state of 1111 by the ON signal or feed command +F.

At this time, when operating (>-2), the subtracter 10 subtracts the contents of the pure binary counter 8 by "1".

When the content becomes 0101 as a result of the subtraction by the subtractor 10, the determination circuit 9 detects this when the ready key 2 is operated 10 times, and outputs a signal to the print control circuit 5.

In response to this signal, the print control circuit 5 issues a feed command +F to the printing device 6, causing it to feed one extra line indicating that the key 2 has been operated 10 times.

In this way, the number of times the key 2 is operated is automatically recorded.

In both of the above two embodiments, 1 recording sheet can be printed by 10 key operations.
Although the mechanism is used to feed an extra line, the number of times this feed is performed and whether the same feed is performed can be arbitrarily designed.

That is, in the embodiment shown in FIG. 1, by changing the output terminal of the shift register 1 to the print control circuit 5, and in the embodiment shown in FIG. 3, by changing the number of judgments in the judgment circuit 9. , the number of key operations can be easily changed.

As described above in detail with reference to the embodiments, according to the device of the present invention,
Counting the number of operations on a specific key does not require a counter with a large number of bits, and when recording the number of operations, the print control circuit is controlled only by detecting the contents of the counter. The structure of the section becomes very simple.

The conventional device detects the contents of the counter, converts it into a decimal number, and records the number of key operations as a decimal number, as described above, so the configuration of a part of the counter is complicated. This does not happen with the device, and the unit price of the entire device can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an apparatus according to an embodiment of the present invention;
FIG. 2 is a diagram showing a recording paper printed by the apparatus of FIG. 1, and FIG. 3 is a block diagram showing the configuration of another embodiment of the apparatus of the present invention. 1... Shift register, 2... Key, 4... OR gate, 5... Printing control circuit, 6... Printing device, 7
...Margin, F... Recording paper feed command.

Claims (1)

[Claims] 1. A counter that counts the number of operations of a specific function key, a print control circuit that detects when the contents of the counter reach a certain value and generates a recording paper feed command to the printing device, and generates the feed command. and control means for detecting and setting the contents of the counter to the initial state, and recording paper is fed extra every time a function key is operated a predetermined number of times, and the number of times the key is operated is recorded. .