JPS58178459A - Small-sized electronic computer with unit converting function - Google Patents

Abstract

PURPOSE:To facilitate unit-to-unit conversion, by providing plural unit keys and a memory for storing conversion rates between units, and operating numeric keys and the unit keys. CONSTITUTION:A mode key 11, and keys 12-15 for units 1-4 are provided in addition to keys that a normal small-sized desk calculator has. An initial-vale setting mode is set with the mode key 11 and the unit keys 12-15 are allotted for dollar, yen, mark, and pound; and numeric keys 2, 3, and 3 and the unit keys 13 and 12 are pressed to input an initial value, i.e. 233 yen for one dollar. Similarly, conversion rates of mark and pound are set. Then, an execution mode is set with the mode key 11 and, for example, when 1,000 yen is converted to dollar, numeric keys 1, 0, 0, and 0 and the unit keys 13 and 12 are pressed to calculate 1,000divided by 233, displaying 4.2918.... Consequently, conversion between various units is facilitated.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention provides a small electronic desktop calculator with a unit conversion function that facilitates the conversion of values between units by providing a plurality of unit keys in an electronic desktop calculator. Regarding formula calculators.

[Technical background of the invention]

Conventionally, when converting units using an electronic desktop calculator, for example, when converting yen to dollars, you first input the value you want to convert (unit: yen), then the division key, then the value of yen for 1 dollar, and finally, etc. This was done by entering the number key.

[Problems with background technology]

As mentioned above, for example, when converting yen to dollars, the keystrokes have to be pressed many times, which is cumbersome.

[Purpose of the invention]

The present invention has been made in view of the above points, and its object is to provide a small electronic calculator with a unit conversion function that can reduce the number of key inputs for unit conversion operations.

[Summary of the Invention] A plurality of unit keys and a memory for storing conversion values between units indicated by the unit keys are provided, and when the unit key is operated, the conversion value is initialized in the memory or the conversion value is used. Unit conversion processing is being performed.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows the key arrangement of a small electronic calculator with a unit conversion function according to the present invention. In the figure, numeric keys "0" to "9", four arithmetic operation keys "+". "-". "×"
．． Keys such as "÷", decimal point key ".", equal sign key "=", input correction key "CE", and clear key "C" have the same functions as those of conventional electronic desktop calculators.

Also, the "MODE" key 11 is used to set two types of modes, and the 10,000 mode is a value in unit j (J = 1 to 4, j = 1) for unit 1 (1 - 1 to 4). (hereinafter referred to as initial setting of unit conversion), and the other mode is a mode in which conversion between units of input data is executed (hereinafter referred to as execution of unit conversion). Further, "unit l" to "unit 4" keys 12 to 15 are used as unit input keys when initializing and executing unit conversion. For example,
Examples of units assigned to the "unit l" key 12 to the "unit 4" key 15 include the dollar, yen, mark, and pound.

Next, the operation of this invention configured as described above will be explained in detail. First, the process shown in the flowchart shown in FIG. 2 is performed as an operation procedure for initializing unit conversion. First, in step S1, it is determined which units are to be assigned to units 1 to 4. In this embodiment, the "unit 1" key 12
is dollar, "unit 2" key 13 is yen, "unit 3" key 14
is assigned to the mark, and the "unit 4" key 15 is assigned to the pound. Next, proceeding to step S1, the above-mentioned initial setting mode is set by pressing the "MODE" key II. Then, in step S1, in order to input the fact that "1 dollar = 233 yen", press the "2" key, the "3" key, and the "3" key.
key, the "unit 2" key 13, and the "unit 1" key 12 in sequence. Next, in step S4, press "l" to enter "l Maltese = 110 yen".
key, "1" key, "0" key, "unit 2" key 13,
The "unit 3" key 14 is operated in sequence. Furthermore, step S. In order to input that "l pound = 1.8 3 dollars", use the "l" key, "・" key, "8" key, "3" key, "unit 1" key 12, "
Unit 4" key 15 is pressed repeatedly. By the above step Ss-S, 1 dollar = 233 yen, 1 mark = 1
The fact that 10 yen and 1 pound = 1,83 dollars is stored in a memory area of 79+ feet in the electronic desktop calculator.

Next, the case of unit conversion will be explained using Fig. 3. First, in step S■, select "MODE"
Operate the key 11 to set the electronic desktop calculator to the execution mode. For example, to display and output how many dollars is 1000 yen, press the "1" key, the "0" key, the "0" key, the "0" key, the "unit 2" key 13, and the "unit 1" key 12. Operate keys sequentially. Through this series of key operations, the process of ``1000÷233'' is executed based on the data indicating that ``1 dollar = 233 yen'' that has been stored in a predetermined memory area in advance at the stage of initial unit conversion settings. The calculation result "4.291RO54" is displayed in step S, . In other words, "1000 yen is 4,2918
454 dollars.'' Next, 3,75
If you want to know how many marks are in a pound, press the "3" key,
” key, “7” key, “5” key, “unit 4” key 15
, "Unit 3" key 14 is operated in sequence. Through this series of key operations, "1 dollar = 233 yen" and "1
Based on the data showing that "mark = 110 yen" and "1 pound = 1.83 dollars", proceed to step SH and select "l4
．． 33601" is displayed. Hereinafter, other unit conversions are performed in the process of step Ss.

Next, another embodiment of the invention will be described. In this other embodiment, a new "SEL" key 16 is provided. At the initial setting stage of unit conversion, memory areas are added for each type of unit each time the "SEL" key 16 is operated. , each time the "SEL" key 16 is operated, a memory area in which converted values for monetary amounts such as dollars and yen are stored and a memory area in which converted values for weight such as pounds and ounces are stored are sequentially specified. There is no need to manually enter the conversion value operated in the above embodiment of the present invention every time a unit conversion for a separate building is attempted.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to provide a small-sized electronic calculator with a unit conversion function that can reduce the number of key operations related to unit conversion and facilitate the process.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the key operation section of a small electronic calculator with a unit conversion function according to an example N of this invention, Figs. FIG. 7 is a diagram showing a key operation section of a small electronic calculator with a unit conversion function according to another embodiment. 11... "MODE" key, l2... "Unit 1"
key, "3..."unit 2" key, 14..."unit 3
” key, 15-“Unit 4” key, 16-“SEL” key.

Claims (2)

[Claims] (1) A plurality of unit keys, a memory that stores conversion values between units indicated by the unit keys, and initial setting of conversion values in the memory or unit conversion processing using the conversion values when the unit keys are operated. A small electronic calculator with a unit conversion function. (2) A small electronic calculator with a unit conversion function as set forth in Claim 1, wherein the memory is provided with a memory area that is added to each type of unit when a specific key is operated.