JPS5828615B2 - Digital register preset Oyobi Tenkenhouhou - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic register, an accounting machine, etc., in which tax rates and the like can be preset to simplify calculations.

Conventionally, when tax rates, etc. are preset to simplify calculations, presetting operations and inspection operations to confirm the already preset tax rates are required, but such task selection is a master key. This is done by switching.

Therefore, it is inconvenient that a task cannot be selected without the master key, and the operation is troublesome, and the program judgment for executing the task based on switching the master key is extremely complicated.

The present invention has been made in view of these points, and an object of the present invention is to provide an electronic register that can automatically select between preset work and inspection work by key operation.

The present invention provides a number setting/presence determining means that determines whether a constant such as a tax rate is entered using a numeric key and issues one of the signals. Provided is a job discrimination means that generates a preset signal to preset the numerical value when the numerical value is set by operation, and generates a check signal to read out the content of the preset numerical value when the numerical value is not programmed. It is characterized by:

Therefore, the presence or absence of the output of the built-in numeric circuit in this type of equipment is used for task selection, eliminating the need for selection tasks using a master key, and also eliminating the need for program control. Since the selection between preset and inspection can be made depending on the presence or absence of the button, the work selection is made according to the order in which the number buttons and constant keys are operated.

An embodiment of the present invention will be described together with circuits shown in the drawings.

1 is a numeric signal N when a numeric key (not shown) is operated.
The numeral circuit serves as means for determining the presence/absence of a numeric value and is configured so that a numeric value signal N is output in response to a signal applied to the numerical key terminal 2.

That is, when a numeric key is pressed, an L level signal is given to the numeric key terminal 2, but this signal is sent to the NOR gate 3.
The signal is applied to the NAND gate 4 through the .

Further, the step terminal 5 of the step signal Sn and the strobe terminal 6 of the strobe signal STB, which are output at the final step of each task, are connected to an AND gate 7, and the output side of the AND gate 7 is connected to the NAND gate 3 and the NAND gate 8. It is connected.

The NAND gate 8 is connected to the NAND gate 8 via an inverter 9.
OR gate 3 is connected.

Such a NAND gate 48 is a flip-flop 10.
It is connected to the.

Therefore, if a numeric key is operated and a number is entered,
An L level signal enters one of the numerical key terminals 2, and the N
The output of OR gate 3 becomes H level.

Therefore, when the step signal Sn is output, it is accepted by the strobe signal STB, and the outputs of the NAND gates -1 and -4 become L level, setting the flip-flop 10 and
A level setting signal N is generated.

Also, when the numeric key is not pressed, the step signal S
When n is input, since the output of NOR gate 3 is at L level, the output of NAND gate 8 becomes L level, reset flip-flop 10, and eliminate digit signal N.

A numeric circuit 1 that performs such an operation is built into all electronic registers for carrying out various tasks, but this numeric circuit 1 is incorporated into a task selection circuit 11 that serves as a task discrimination means. Connecting.

That is, an AND gate 1516 is provided, each connected to two flip-flops 1314 to which a clock terminal 12 to which a clock pulse φ is applied is connected, and one AND gate 15 is directly connected to the numeral circuit 1. and is connected to the other AND gate 16 via an inverter 17.

An AND gate 18 is connected to the input sides of these AND gates 15 and 16, and a constant key is connected to the input side of the AND gate 18 via a step terminal 19 to which a step signal So for business start is applied and an inverter 20. The tax rate key terminal 22 of the tax rate key 21 is connected.

The flip-flop 13 also has a step terminal 2 for a preset signal Sm for starting the tax rate presetting service.
3 is connected, and the flip-flop 14 is connected to a step terminal 24 for an inspection signal Se for starting the tax rate inspection service.

Therefore, in the process of job selection, as shown in the flowchart of FIG. A preset signal Sm is output, and when a numeric value signal N is not present, a check signal Se is output.

First, select the tax rate key 2 with a certain number already set.
If 1 is pressed, the numeric value signal N is output, so the output of the AND gate 18 goes to the H level at the step signal So for starting the work, and the output of the AND gate 15 goes to the H level.
level.

Therefore, the flip-flop 13 is set by the step switching clock pulse φ, and a preset signal Sm is generated at the step terminal 23.

Therefore, when presetting is performed thereafter, the preset value is preset as the tax rate.

Furthermore, if the tax rate key 21 is pressed without making any numeric entry, there is no numeric entry signal N, so the output of the AND gate 16 becomes H level, and the flip-flop 13 is reset by the clock pulse φ, and other The flip-flop 14 is set, and a check signal Se is output to the step terminal 24.

Therefore, the preset tax rate is read out and checked.

To change the tax rate, perform the preset operation as described above.

In addition, in the above embodiment, the tax rate key 2 is used as a constant key.
1 was used to explain the state of presetting and checking tax rates, but there are various constants to be preset, such as service charge rates, basic deduction reference points, tax exemption points for food and accommodation, etc., and they can be used as necessary. It is something that will be done.

As described above, the present invention uses a number determining means to determine whether or not a constant such as a tax rate has been entered using a numeric key, and when a constant key is pressed, either a preset signal or a check signal is output. Since this is done using the discrimination means, there is no need to worry about selecting tasks using a master key as in the past, and the program design can be extremely simplified. This can be easily done by simply using the and constant keys in the order of operations.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing an example of a circuit according to the present invention, and FIG. 2 is a flow chart. 1...... numeric circuit, 21...... tax rate key (
constant key), Sm...preset signal, Se...
...Inspection signal.

Claims (1)

[Claims] 1. Provide a number presence/absence determining means that determines whether a constant such as a tax rate is entered using a numeric key and issues one of the signals, and operate the constant key in response to a signal from this number presence/absence determining means. The present invention is characterized by providing a business discrimination means for generating a preset signal for presetting the numerical value when the numerical value has been set, and generating a check signal for reading out the contents of the preset numerical value when the numerical value has not been set. electronic register.