JPS6337433B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention provides a system for detecting department keys by combining a plurality of extended keys, since the number of basic department keys (hereinafter simply referred to as basic keys) is insufficient. The present invention relates to a key input device that improves operability and prevents erroneous registration by giving priority to appropriate extended keys in an electronic cash register with expanded keys.

[Prior Art] Conventionally, in electronic cash registers, when the area of the key plate is limited and when processing a large number of departments, it is difficult to cover all departments with just the basic key. In addition to this basic key, multiple expansion keys are provided, and a keyboard control circuit converts the expansion key signal into an expansion key code and the basic key signal into a basic key code, and the CPU is controlled by a control program.
It is known that a central processing unit (Central Processing Unit) combines an extended key code and a basic key code to create a department input code. In this conventional system, for example, to input the number 1 department (for example, children's pants), first press the expansion key that means the 000 series (for example, corresponding to the large department "children's clothing"), then press the basic key for number 01. To enter the department number 101 (for example, women's pants), first enter the number 100 (for example, the large department "women's clothing").
After pressing the expansion key (corresponding to ``101''), he pressed the same basic key 01 as above to enter department 101.

[Problems to be Solved by the Invention] However, the keyboard control circuit outputs key codes corresponding to key signals from the extended keys and basic keys of the keyboard, and the CPU controlled by the control program outputs key codes from the keyboard control circuit. Since the input code for the department was a combination of the extended key code (or basic key code) and the basic key code (or extended key code) that were sent sequentially, the input code for each department was always expanded once. The key and the basic key must be pressed once each, which increases the number of key operations, resulting in an increase in registration processing time.Furthermore, there are problems in that erroneous registration due to forgetting to press an extended key is likely to occur. .

The present invention has been made in view of the above-mentioned problems, and it gives priority to a specific, for example, frequently used extension key, omitting the pressing of this extension key, and
This is intended to simplify key operations by reducing the number of key operations.

[Means for Solving the Problems] The present invention provides a keyboard with a plurality of expansion keys for generating expansion key signals and a plurality of basic keys for generating basic key signals, and a keyboard control circuit. A key input device for an electronic cash register that converts an extended key signal into an extended key code and a basic key signal into a basic key code, and combines the extended key code and the basic key code to use as a department input code. A priority set key for setting a priority for a specific key among the plurality of expansion keys, a memory for storing priority expansion key information, and a priority expansion key information according to a pressing signal of the priority set key. is output and written in the memory, determines whether the pressed key of the keyboard is an extended key or a basic key, and when the pressed key is an extended key, outputs the corresponding extended key information, and determines whether the pressed key is an extended key or a basic key. control means for reading and outputting priority extended key information from the memory when the key is a basic key; an extended key control circuit for outputting key data corresponding to the extended key information output by the control means; and the extended key control circuit. The present invention is characterized by comprising an extended key recognition circuit that identifies an extended key based on key data from and outputs a corresponding extended key signal to the keyboard control circuit.

[Function] (a) When the priority set key is pressed, the control means writes information indicating that a specific key (for example, number "000") among the plurality of expansion keys is the priority expansion key, and also , priority extended key information is output to the extended key control circuit.
Therefore, the corresponding key data is output from the extended key control circuit, the extended key number "000" is recognized by the extended key recognition circuit, the corresponding extended key signal is input to the keyboard control circuit, and the keyboard control circuit outputs the corresponding key data. It enters the "000" mode in which the extended key code "000" is output and waits for the basic key signal to be input.

(b) Then, when a basic key (for example, number "01") is pressed, a basic key signal is input to the keyboard control circuit, and the code of the basic key number "01" is output.
Therefore, the combination of the code for the extended key number "000" and the code for the basic key number "01" becomes the input code for the department. At the same time, the control means distinguishes it as a basic key, reads priority extended key information from the memory, and outputs it to the extended key control circuit, so the extended key recognition circuit recognizes the extended key number "000" in the same way as in (a) above. and sets the keyboard control circuit to “000” mode.

(c) In (b) above, if an extended key (for example, "100") is pressed instead of the basic key number "01", the control means determines that it is an extended key and sends the extended key information to the extended key control circuit. Output. Therefore, the corresponding key data is output from the extended key control circuit, extended key number 100 is recognized by the extended key recognition circuit, the extended key signal corresponding to the keyboard control circuit is input, and the keyboard control circuit outputs the corresponding key data. outputs the code for the extended key "100" and enters the "100" mode, waiting for the basic key signal to be input.

(d) When a basic key (for example, 01) is pressed in this ``100'' mode, the code for the basic key ``01'' is output from the keyboard control circuit in the same manner as in (b) above, and the extended key ``01'' is output. The combination of the code No. 100 and the code No. 01 of the basic key becomes the input code for the department. At the same time, in the same manner as in the latter part of (b) above, the control means reads out the priority expansion key information from the memory, confirms the priority expansion key number "000" in the expansion key recognition circuit, and then switches the keyboard control circuit to the priority expansion key number "000" again. mode.

[Example] Next, an example of the present invention will be described based on the drawings. In Fig. 1, 1 is a keyboard of an electronic cash register, and this keyboard 1 has expansion keys 2, 3, 4, which are made up of three classes: ``000'' series, ``100'' series, and ``200'' series. Display lamps 5, 6, 7 to indicate which class of expansion key is in operation, from "01" to "50" (depending on the purpose, set in the range of "99" for example) Basic key 8 consisting of the keys of
Priority is given in advance to any one of the numeric keypad 9 consisting of "0" to "9" and "00", and the three types of expansion keys 2, 3, and 4: "000", "100", and "200". A priority set key 10 and other function keys 11, 12 are provided for giving priority.

FIG. 2 is a block diagram of the entire device. In this figure, 1 is the keyboard, and this keyboard 1 includes the three types of expansion keys 2, 3, 4,
It consists of a matrix section 13 of other keys.

One end of the expansion keys 2, 3, 4 is grounded, and the other end is connected to the keyboard control circuit 14, and the OR circuits 16, 1 of the gate circuit 15.
7, 18, connected via AND circuits 19, 20, 21 to an expansion key recognition circuit 22 that determines which type of expansion keys 2, 3, and 4 has been pressed and outputs a corresponding expansion key signal. has been done.

The keyboard control circuit 14 includes, in addition to the key matrix section 13 and the extended key recognition circuit 22, an extended key control circuit 23 for controlling the extended keys 2, 3, and 4, and a central processing unit (CPU) 24. are connected to communicate information with each other.
The output side of this extended key control circuit 23 is an output line l ₁ ~
l ₆ is connected to the display lamps 5, 6, 7 via AND circuits 25, 26, 27, respectively, and the other input of each of the OR circuits 16, 17, 18 and AND circuits 19, 20, 21. connected to the side. 28 is a random access memory (RAM), and when a specific extension key is selected from extension keys 2, 3, and 4 and set using the priority set key 10, the set extension key is stored in this RAM 28. A memory area is provided for storing priority extended key information for giving priority to keys.

The CPU 24 is controlled by a control program in a ROM (read only memory) or the RAM 28 (not shown), and outputs priority extended key information to the extended key control circuit 23 by pressing the priority set key, and also outputs this information in the RAM 28. When one of the expansion keys 2, 3, 4 or the basic key 8 of the keyboard 1 is pressed, the pressed key becomes the expansion key 2,
Determine whether it is 3, 4 or basic key 8,
When the extended key is 2, 3, or 4, extended key information corresponding to the pressed extended key (for example, information indicating that the extended key is 3) is output to the extended key control circuit 23, and when it is the basic key 8, the extended key information corresponding to the pressed extended key is output to the extended key control circuit 23. The RAM28
It has a function of reading priority extended key information from a predetermined memory area in the memory area and outputting it to the extended key control circuit 23.

Next, the operation of the present invention will be explained. “000” for convenience
It is assumed that priority is given to number extension key 2.

(b) First, press "000" on the priority set key 10.
Then, in response to this, the key matrix section 13
from the CPU 2 via the keyboard control circuit 14.
4, the CPU 24 writes the corresponding priority extended key information into a predetermined memory area in the RAM 28, and sends this extended key information to the extended key control circuit 23. This results in
The output lines l ₁ and l ₄ of the extended key control circuit 23 are “1”
Then, the display lamp 5 for the "000" number is turned on, the outputs of the OR circuit 16 and the AND circuit 19 are set to "1", the extended key recognition circuit 22 determines the "000" number, and the keyboard control circuit 14 Set the mode to "000".

(b) Here, number "101", number "02", number "03",
It is assumed that each department numbered "204" is entered.
In the case of number "101", first press extension key 3 of number "100". Then, the CPU 24 determines that the pressed key is the extension key 3 and sends the corresponding extension key information to the extension key control circuit 23. Therefore, the extended key control circuit 23 sets the output lines l ₂ and l ₅ to "1" and sets the other output lines l ₁ , l ₃ , l ₄ , and l ₆ to "0". That is, at first, since "000" has priority, outputs are output to the OR circuit 16 and the AND circuit 19 as described above, but by pressing "100", the AND circuit 19 is inhibited. Therefore, the extended key recognition circuit 22 recognizes the extended key "100".
and outputs a corresponding extended key signal to the keyboard control circuit 14.
Convert 4 to "100" series mode and press basic key 8
wait for input. Furthermore, since the output lines l ₂ and l ₅ are set to "1", the lamp 6 for the "100" series is lit.

(c) Next, press basic key 8 “01”.
The department code corresponding to number "101", which is a combination of the code corresponding to number "100" and the code corresponding to number "01", is input from the keyboard control circuit 14 to the CPU 24, and the code corresponding to this is inputted to the CPU 24.
It is printed by a printer (not shown) via the CPU 24. At the same time, the CPU 24 determines that the pressed key is the basic key 8, reads priority extended key information from a predetermined memory area in the RAM 28, and inputs this to the extended key control circuit 23. Output lines l ₂ , l ₅
changes to "0", output lines l ₁ and l ₄ become "1",
The output of the OR circuit 16 and the AND circuit 19 is "1"
As in (a) above, the keyboard control circuit 14
Returns to the "000" series mode. Then, the "000" number display lamp 5 lights up in the same manner as described above.

(d) Under this "000" number mode, if you press the "02" or "03" key of basic key 8, the code corresponding to "000" will be displayed in the same way as in (c) above. "002" or "003" combined with the code corresponding to "02" or "03"
The department code corresponding to the number is input from the keyboard control circuit 14 to the CPU 24, and the corresponding code is printed by the printer via the CPU 24. At the same time, the keyboard control circuit 14 continues the "000" series mode in the same manner as in (c) above.

(e) Next, in the case of number "204", when the expansion key 4 of number "200" and the basic key 8 of number "04" are pressed in sequence, the number "204" is pressed in the same way as in (b) and (c) above. The department code corresponding to is sent from the keyboard control circuit 14.
When input to the CPU 24 and pressing of the basic key 8 numbered "04", the keyboard control circuit 14 returns to the "000" series mode again.

In the above embodiment, the priority is set to the expansion key 2 in the "000" series, but the priority is not limited to this. Taking into account the purpose of use, frequency of use, etc., the priority set key 10 is used to set the priority to "100", "100", " Of course, you can change it to a number such as ``200''.

Note that when the priority set key 10 is not set, the operation is similar to the conventional example.

In the embodiment described above, the gate circuit 15 is provided, and the other ends of the expansion keys 2, 3, and 4 are connected to one input side of the OR circuits 16, 17, and 18 of the gate circuit 15,
Connecting the output lines l ₁ , l ₂ , l ₃ of the extended key control circuit 23 to the other input sides of the OR circuits 16 , 17 , 18 ,
Although the output lines _l4 , _l5 , _l6 of the extended key control circuit 23 are connected to the other input sides of the AND circuits 19, 20, 21 of the gate circuit 15, the present invention is not limited to this. , omitting the gate circuit 15,
The output lines l ₁ , l ₂ , l ₃ of the extended key control circuit 23 may be directly connected to the input side of the extended key recognition circuit 22 .

[Effects of the Invention] Since the present invention is configured as described above, for an extended key that has priority, the division of the number corresponding to the extended key can be changed without pressing the extended key, that is, by pressing only the basic key. The number of key operations is reduced compared to the conventional method. Therefore, it is possible to omit key operations, shorten the registration processing time based on this, and prevent erroneous registration due to forgetting to press an extension key or other malfunctions.

The effect will be even greater if the extended keys that are given priority are set to those that are used frequently.

[Brief explanation of drawings]

The figures show an embodiment of the key input device for an electronic cash register according to the present invention, with FIG. 1 being a front view of the keyboard and FIG. 2 being a block diagram. 1... Keyboard, 2, 3, 4... Expansion keys,
5, 6, 7...Display lamp, 8...Basic key, 1
0... Priority set key, 13... Key matrix section, 14... Keyboard control circuit, 15...
Gate circuit, 16, 17, 18... OR circuit, 1
9, 20, 21, 25, 26, 27...AND circuit, 22...Extended key recognition circuit, 23...Extended key control circuit, 24...CPU, 28...RAM.

Claims (1)

[Claims] 1. A keyboard is provided with a plurality of expansion keys for generating expansion key signals and a plurality of basic keys for generating basic key signals, and a keyboard control circuit converts the expansion key signals into expansion keys. A key input device for an electronic cash register that converts a basic key signal into a basic key code, and combines the extended key code and the basic key code as an input code for a department. a priority set key for setting priority for a specific key among the keys; a memory for storing priority extended key information; and a memory for outputting priority extended key information in response to a press signal of the priority set key. , determines whether the pressed key on the keyboard is an extended key or a basic key, and if the pressed key is an extended key, outputs the corresponding extended key information, and if the pressed key is a basic key, outputs the corresponding extended key information. a control means for reading and outputting priority expansion key information from the memory; an expansion key control circuit for outputting key data corresponding to the expansion key information output by the control means; and expansion by the key data from the expansion key control circuit. 1. A key input device for an electronic cash register, comprising an extended key recognition circuit that identifies a key and outputs a corresponding extended key signal to the keyboard control circuit.