JPH01259444A - Desk calculator - Google Patents

Abstract

PURPOSE:To calculate the time and the calendar of years, days, or the like with an easy operation by providing plural time unit key switches and not only inputting and operating a numerical value signal for each time unit but also converting the operation result to another time unit in accordance with the operation result of each time unit by an arithmetic means. CONSTITUTION:The numerical value inputted with a numerical value input key switches 20 is inputted for each time unit by time unit keys 40 and is operated. If carry-up to another time unit or carry-down from another time unit is necessary as the operation result, the operation result is converted to perform carry-up or carry-down. Consequently, it is unnecessary for a user to calculate the numerical value in each time unit and to carry up or carry down the calculation result. Thus, the time is calculated with the easy operation to find the result.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a desktop calculator.

[Prior Art] Desktop calculators are widely used because they allow operations such as addition, subtraction, multiplication, and division to be performed with simple operations and are inexpensive.

[Problems to be Solved by the Invention] However, when performing time-related calculations such as finding the time 3 hours and 50 minutes after 9:30 a.m., the conventional desktop calculator allows the user to Since the user has to calculate each, add the carried minutes of the minute to the hour, and then decide whether it is morning or afternoon based on the result, it is easy for young children such as children to calculate the time. It was impossible.

In addition, in order to know how old a person born in 1904 was, it was necessary to look at a quick reference table such as a calendar. Furthermore, for example, in order to know how many days there are from April 8th to August 31st, it is necessary to count the number of days using a calendar or the like.

SUMMARY OF THE INVENTION An object of the present invention is to provide a desk/calculator that can perform time calculations and calendar calculations such as years and days with simple operations.

[Means for Solving the Problems] A first aspect of the present invention is to input numerical signals input by operating a plurality of numerical input key switches provided corresponding to at least integers from O to 9, respectively. In a desktop calculator that performs arithmetic processing using a calculation means and displays the calculation result on a display means, a plurality of time m provided corresponding to at least hour and minute time units are provided for inputting time units.
The calculation means inputs and calculates the numerical signal for each time unit, and converts the calculation result into another time unit according to the calculation result for each time unit. do.

The second invention also provides a plurality of numeric input key switches, each of which includes a storage means for storing a calendar relating to the year, month, and day, and which is provided to correspond to an integer from at least 0 to 9, respectively; The technical means is to perform calendar calculations based on the numerical signals input by operating the calendar unit keys for inputting the respective calendar positions of the month and day.

[Operations and Effects of the Invention] In the calculator of the first invention, numerical values input using the numerical input key switch are input and calculated for each time unit using the m-time key switch. Further, as a result of the calculation, if it is necessary to move up or move down from another time unit, the value is converted and moved up or down.

Therefore, the user does not need to calculate the calculation result for each unit of time and bring the calculation result up or down, so the user can calculate the time and know the result with a simple operation.

Furthermore, in the second aspect of the invention, the storage means stores calendars relating to the year, month, and day, and a calendar unit key is provided for each calendar unit, so that calendar calculations can be performed with simple operations.

[Example] Next, the present invention will be explained based on embodiments shown in the drawings.

The desk calculator 1 of the present embodiment shown in FIG. 1 includes a resin main body case 2 shaped like a thin board box, and a group of keys exposed from the main body case 2 for instructing numerical values to be calculated and calculation contents. 10, an arithmetic unit 60 shown in FIG. has been done.

The key group 10 is made up of a large number of keys, and is used to close each contact (not shown) of the 7-trix switch circuit 61 of the calculation section 60 in accordance with the operation of each key. A group of numeric keys 20 for inputting data, a group of calculation keys 30 for specifying calculations, and, in this embodiment, a group of time unit keys 40 and a group of time calculation keys 50 provided to easily perform time calculations. The function name given to each key is printed on the top of each key group 10, and when each key is operated, a signal corresponding to the function given to each key is sent from the matrix switch circuit 61 to the calculation circuit. Sent to 62.

The numeric key group 20 includes keys that indicate Arabic numerals from 0 to 9 and decimal points, and the arithmetic key group 30 includes keys such as "+", "+", and "+", respectively, indicating the four arithmetic operations of addition, subtraction, multiplication, and division.
−1×, ÷” and “−” are provided.

In addition, the time unit keys 40 specially provided for time calculation include 1-year, month, day, hour, and so on as time units.
"minutes, seconds" and "am, pm" are in the time operation key group 50.
``from'', ``to'', and ``between'' are provided respectively.

The key group 10 also includes a correction key 11 and a code conversion key 12.
, a memory key group 13, and power keys 14.15, and in addition, a calendar key 16 for selecting a calendar H (calculation) is provided.If you forge the calendar key 16 before inputting numerical values, the calendar calculation mode will be activated, and the calendar will be displayed. Calculations are performed, and the switching key 17 switches between normal arithmetic operations and time calculations.

The calculation section 60 consists of a matrix switch circuit 61 whose contacts are formed from metal plates, and a calculation circuit 62 mainly consisting of a semiconductor integrated circuit.These circuits and the aforementioned display device 70 are integrated into a printed circuit board made of insulating resin. has been made into

71-RiX switch circuit 61 closes the contacts in response to the operation of the key group 10 by the user and sends the signal to the calculation circuit 62, and the sent signal is a numerical signal according to the operated key, a time signal, etc. This is an m-order signal or a designation signal for each calculation.

The arithmetic circuit 62 performs four normal arithmetic operations, and in this embodiment, in particular, can easily perform time calculations for each time unit based on signals from the time unit key group 40. When calculating time, for example, "minutes"
If the calculation result is 60 or more,
It is automatically carried forward to the hour unit, and conversely, if it is insufficient, it is automatically moved down from the hour unit. This time unit conversion is performed in the same way for other time units, and when time #J[ is performed, morning and afternoon are also distinguished.

Furthermore, when Moe, who is calculating time, operates the calendar key 16, the calendar calculations for "1 year" and "January" are performed based on the calendar for a certain number of years stored in advance in the storage device.

In time calculations, an error will occur if the time units of input numerical values overlap or if the input order is inappropriate.

These input numerical values and calculation results are constantly output to the display device 70 as display signals.

The display device 70 displays numbers and characters on a liquid crystal display screen 70a provided in the main body case 2 based on display signals from the arithmetic circuit 62.
Two characters are displayed in two rows.

The desk and L computer 1 having the above configuration are used and function as follows.

In normal arithmetic calculations, "a", "t", "b", "=" or “aj,” “×”, “b,,r=.

(However, a and b are arbitrary numbers.) When you operate a key, the display device 7 changes accordingly.
0 is displayed in order, and the calculation result is displayed at the end.

When calculating time, for example, to find the time 5 hours and 35 minutes after 9:30 p.m., use "9:00 p.m.
If you press J and each key in order from 3.01 minutes, rPM 9:30;00'' will be displayed, and if you press each key to 111 and press ``5, hour, 3.5, minute,'' , '5:35:OOJ' is displayed, and then 'Pause,
-" key, the calculation result is 'AM 3
:05; OOJ is displayed. Note that r:ooJ is displayed even if nothing is input as seconds.

Also, to find the time from 7:35 a.m. to 4:10 p.m., press each key like ``from 7:35 a.m. to 3.5 minutes'' and ``7:35 a.m.; ooJ'' will be displayed. Then, if you press the key [PM, 4, hour, 10, minute], rPM4:1o, ooJ will be displayed, and if you then press the key ``until ='', the calculation result will be ``
Time 8:45; OOJ is displayed.

The calculation result in time calculation is displayed according to the input time unit, but for example, "3 hours and 24 minutes" can also be converted into "minutes". In this case, "3, o'clock,
2.4. After inputting ``minutes'', operate the code conversion key 12, which operates as a time unit conversion key when calculating time, and then press ``minutes, -'' to convert to minutes.
204J' is displayed. At this time, the unit r minutes is simultaneously displayed on the liquid crystal display screen 70a.

In calendar calculation, when the calendar key 16 is operated at the beginning of calculation, 1
Regarding the year and month, calculations are performed according to the calendar, and in this case, if the year J and January month are not input, it will be processed as a normal time calculation.

For example, even if you want to find out the year, month, and day of 0 days after December 10, 1988, you can easily obtain the result.

Also, if you want to find the number of days from April 1, 1988 to December 31, 1988, use "Calendar, 1.9.8.8,
After inputting "Year, 4, Month, 1, Day,", enter "1.9.8.
If you input ``8, year, 1.2, month, 3.1, day, until ='', the number of days will be obtained, and ``1 day'' will be displayed as a unit at the same time as the number of days.

At this time, if, for example, "hour" is input between "until" and "=1," the calculation result will be obtained in the unit of "hour."

In calendar calculations, 1 is used to specify the era name and Western calendar when calculating time.
The memory keys 13 that can be used can also be used to convert between the Western calendar and the era name, and when converting the year 1901 into the era name, after operating the keys "Calendar, 1.9, Oll, Year". , by operating the code conversion key 12 to select "-", the era name will be replaced and displayed. At this time, for example, "M" indicating the era name "Meiji" is simultaneously displayed on the liquid crystal display screen 70a. Conversely, when converting the era name to the Western calendar,
For example, after operating the keys for "calendar, Showa, 6.3, year", if the box number conversion key 12 is operated and "-" is operated, the calendar is converted to the Western calendar.

As described above, according to the tabletop needle n machine of the present invention, it is possible to calculate time and days with simple operations, so even young people can easily use it.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the external shape of the desktop calculator of this embodiment, and FIG. 2 is a block diagram showing the functional configuration of the desktop calculator of this embodiment. In the figure, 20...Numeric key group (multiple numerical input m key switches), 40... Time unit key group (multiple time unit key switches, calendar unit keys), 62... Arithmetic circuit (arithmetic means) , storage means), 70...display device (display means)
.

Claims (1)

[Scope of Claims] 1) Arithmetic processing of numerical signals input by operating a plurality of numerical input key switches provided corresponding to integers from at least 0 to 9, respectively, by a calculation means;
A desk calculator for displaying calculation results on a display means, comprising a plurality of time unit key switches provided corresponding to at least hour and minute time units for inputting time units, and said calculation means inputting said numerical signal. What is claimed is: 1. A desk calculator, which inputs and calculates each time unit, and converts the calculation result into another time unit according to the calculation result for each time unit. 2) Equipped with a storage means for storing a calendar regarding the year, month, and day;
Numerical signals input by operating a plurality of numerical input key switches each corresponding to an integer from at least 0 to 9 and calendar unit keys for inputting calendar units of year, month, and day. A desktop calculator that performs calendar calculations based on .