JPH11102346A - Desk top electronic calculator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a desk top electronic calculator which enables a user to display the number of a desired count number among IC(item counter), GC (grand total counter), and MC(memory counter) and grasp a current calculation position halfway in calculation such as slip calculation. SOLUTION: This electronic calculator is provided with an IC which counts calculations made by operating operator keys, the GC which counts how many times a calculation result is made, and the MC which counts how many time addition to or subtraction from a memory is performed and further provided with a counter switch 41 for selecting one of the IC, GC, and MC; and the count number of the counter specified with the counter switch 41 is displayed on the display screen of a display device 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic desk calculator, and more particularly, to an electronic desk calculator capable of easily grasping a current calculation position during a calculation such as a slip calculation.

[0002]

2. Description of the Related Art As a conventional example of this type of electronic desk calculator, there is known an electronic desk calculator provided with an item counter (hereinafter referred to as an IC) (Japanese Patent Laid-Open Nos. 50-11496 and 57-136270). No., JP-A-499-1
No. 15627).

Here, IC means [+], [-],
Each time you enter an operator key such as [×], [÷], [=], [√], [tax included], [excluding tax], [%], [M +], [M-], etc. to calculate A counter that counts the number of times.

FIG. 8 shows the external configuration of such a conventional electronic desk calculator 100.
00 has a display unit (display device) 102, a keyboard 103 including an operator key and the like, and a switch 104. The switch 104 is provided with an IC 104-1 and displays only the IC.

[0005]

By the way, in recent electronic desk calculators, further enhancement of functions and improvement of operability are demanded. For the counter function, for example, a slip calculation or the like is required only by the above IC. Since the current calculation position cannot be grasped in the middle of the calculation, there is a problem that the calculation position is not known in the middle of the calculation.

[0006] Under such circumstances, there is an urgent demand for an electronic desk calculator having such functions and capable of further improving the functions and operability.

As a counter capable of realizing such a function, a ground total counter (hereinafter, referred to as GC) or a memory counter (hereinafter, referred to as MC) can be considered. By combining the above, it is possible to grasp the current calculation position in the middle of calculation such as slip calculation.

Here, the GC means a counter which counts the number of calculation results each time a calculation result is obtained by keying in [=] or [%].

The MC is a counter which counts the number of times each time [M +] or [M-] is input by a key and added or subtracted from the value stored in the memory.

The present invention has been made in view of such a situation, and allows a user to display the count number of a counter desired to be viewed from among ICs, GCs, and MCs. It is an object of the present invention to provide an electronic desk calculator capable of grasping a current calculation position and greatly improving functions and operability.

Another object of the present invention is to provide an electronic desk top which can display a desired count number among IC, GC, and MC only by a user inputting one key, thereby further improving operability. A computer is provided.

[0012]

An electronic desk calculator according to the present invention comprises an item counter for counting the number of calculations each time an operator key is input, and a grand total counter for counting the number of calculations each time a calculation result is obtained. A designation switch for selecting one of the item counter, the grand total counter or the memory counter, and a designation switch for selecting one of the item counter, the grand total counter or the memory counter. Control means for displaying the count number of the counter designated by the switch on the display screen, whereby the object is achieved.

Preferably, each time the designated switch is input, the counter is sequentially switched in the order of an item counter, a ground total counter, a memory counter, and an item counter, and the count of the designated counter is displayed on the display screen. Configuration.

The operation of the present invention will be described below.

According to the above configuration, when the designated switch is operated by a key, the operator inputs a key and the number of times of execution of the calculation, [=] or [%] is input by a key, and the calculation result is input. Is displayed on the counter display screen, how many times has been obtained, or how many times addition and subtraction have been performed on the memory by keying in [M +] or [M-]. Can easily grasp the current calculation position during calculation such as slip calculation.

As a result, according to the electronic desk calculator of the present invention, it is possible to reliably solve the problem that the calculation position is not known during the calculation, so that its function and operability can be greatly improved.

Further, every time the designated switch is inputted, the counter is sequentially switched in the order of item counter → ground total counter → memory counter → item counter, and the number of the designated counter is displayed on the display screen. According to this method, it is possible to easily grasp what counter is currently displayed, so that the operability can be further improved.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings.

(First Embodiment) FIGS. 1 to 4 show a first embodiment of an electronic desk calculator according to the present invention. First, an external configuration of the electronic desk calculator will be described with reference to FIG.

The electronic desk calculator 1 includes a display device 2 composed of an LCD and its driving circuit, a keyboard 3, and a switch 4.

The display device 2 is provided with a numerical value display unit for displaying numerical values and calculation results, a counter display unit, and a status display symbol.

The keyboard 3 includes numeric keys and decimal point keys for numeric input, [+], [-], [×], [÷],
Operator keys such as [√], [tax included], [excl. Tax], [%],
It is provided with a calculation execution key such as [=], a memory key such as [M +] and [M-], a [GT] key, and other keys for realizing functions provided in the device.

The switch 4 includes a TAB switch for designating a rounding position as a result of calculation, a round switch for designating a rounding method, and a counter switch 41 for designating a counter to be displayed on a counter display section.

Next, the electronic desk calculator 1 will be described with reference to FIG.
The configuration of the system will be described. This system uses C
It includes a PU 11, a ROM 12, a RAM 13, the keyboard 4, the switch 4, and the display device 2.

The CPU 11 is a control center of the system, and controls reading processing of various keys, calculation processing including four arithmetic operations, counter counting processing, calculation result display processing, and the like. This control is performed according to a program stored in the ROM 12. The RAM 13 is provided with registers, flags, and other work areas necessary for operations.

The configuration of the work area of the RAM 13 will be described below. The X register 13a stores values such as numerical values and calculation results, and the contents are displayed on the display screen of the display device 2. The number of operands (the number input before the operator key) and the like are stored in the Y register 13b. Display contents are stored in the display counter 13c,
The contents are displayed on the display device 2.

The item counter (IC) 13d includes:
The number of calculations performed by inputting an operator key is held.
The grand total counter (GC) 13e has
The number of times the calculation result is obtained by inputting [=] or [%] is held. The memory counter (MC) 13f holds the number of operations performed on the memory 13g. 13h
Is a GT memory.

Here, the operation of the memory 13g will be described. As an example, if you enter the number 3 [M +] by key,
The stored value of the memory 13g is 3, and when a numeral 5 [M +] is further keyed in from this state, the stored value of the memory 13g is 3 + 5 = 8. Furthermore, when the numeral 2 [M−] is input by a key, the value stored in the memory 13 g is 8−2 = 6.
Further, when a key of 3 × 6 [M +] is input, the memory 1
The stored value of 3g is 18 + 6 = 24. 13g of memory
Is displayed when the [RM] key in FIG. 1 is pressed.

The GT memory 13h has, for example,
When the number 3 [+] [=] is keyed in, the stored value becomes 3
From this state, if a key of 3 × 6 = is further input by a key, the stored value of the GT memory 13h becomes 3 + 18 = 21. Further, when a numeral of 2 [×] 5 [%] is input by a key, 2
1 + 0.1 = 21.1. The stored value of the GT memory 13h is displayed when the [GT] key in FIG. 1 is keyed.

The operator flags 13i are [+],
Indicates which of the operator keys [-], [x], [÷] has been input. Status flag 13j
Indicates which of a numerical state, a state before an operator key is pressed and calculation is performed, and a state after execution of an operation.

The keyboard 3 is for the user to specify a numeral, a correction, an operator, and the like. The switch 4 is for the user to specify switching of the verification mode.

The display device 2 comprises an LCD and its driving circuit, etc., and displays an input or operation result in a numeral, a counter, a symbol of a verification result, a state display symbol and the like.

In the electronic desk calculator 1 of the first embodiment, the counter is a two-digit positive integer, and the counter advances only in a positive direction for any operation.

Next, a control procedure of the CPU 11 in the counter control will be described with reference to FIG. CPU11
When a program for counter control stored in the ROM 12 starts, first, in step S1,
The counter switch 41 provided on the switch 4
It is determined whether or not an IC among C, GC, and MC is designated. When it is confirmed that the counter switch 41 designates the IC, the process proceeds to step S2, where it is determined whether or not any numeric key is set, that is, whether or not a numeric input is performed. If it is determined that the input is a number,
Since the count is not incremented, in this case, the counter processing ends.

On the other hand, if it is determined in step S2 that the input is not a number, the process proceeds to step S3, where it is determined whether or not the operator key is set. When it is confirmed that the operator key is set, the process proceeds to step S6, where the IC is counted up by one. That is, IC
→ Set to IC + 1. Next, since the IC is incremented by 1, the displayed counter is also incremented by 1 (step S7).

On the other hand, if it is determined in step S3 that the operator key has not been input, the process proceeds to step S4 where it is determined whether or not the [C (clear)] key has been set. Then, if it is determined that the [C] key is set to a numerical value, in this case, since it is the first numerical input of the expression, it is necessary to clear that the counter for the previous calculated expression is displayed. , Item counter 1
0 is set to 3d, and the process proceeds to step S7, where the display counter is also set to 0.

If it is determined in step S1 that the counter switch 41 has not designated an IC, the process proceeds to step S1.
The process proceeds to step 8, where it is determined whether or not the GC of the GC and the MC is designated. Then, after confirming that GC is specified, the process proceeds to step S9, where
There is a [=] or [%] key input, and it is determined whether or not a numerical value of the operation result has been input (storage of the operation result) to the GT memory 13h in order to obtain the operation result.

Then, in step S9, the GT memory 13h
When it is confirmed that the calculation result is stored in
Proceed to 13, where the GC is counted up by one.
That is, GC → GC + 1. Next, since GC → GC + 1, the displayed counter is also incremented by 1 (step S14).

On the other hand, in step S9, [=] or [%]
If it is determined that there is no key input, the process proceeds to step S10, where a numeral has been entered, an operator key other than [=] or [%] has been input, or [=] or [% ] Is entered, it is determined whether a numerical value has not been stored in the GT memory 13h. If determined as such, the GC is not counted up, and the counter processing ends.

On the other hand, if the result of the determination in step S10 is the reverse of the above, the flow proceeds to step S11, where [C]
It is determined whether or not the key is set. And
When it is determined that the [C] key has been set, in this case, since it is the first input of the formula, the counter for the previously calculated formula is cleared to clear the GC. Is set to 0, and the process proceeds to step S14, where the display counter is also set to 0.

If it is determined in step S8 that the counter switch 41 has not designated GC, step S8 is executed.
Proceeding to step 15, it is determined whether or not the counter switch 41 specifies MC. When it is confirmed that MC has been designated, the process proceeds to step S16, in which it is determined whether there is a key input of [M +] or [M-] and a numerical value is input to the memory 13g. . If it is determined that a numerical value is stored in the memory 13g, the process proceeds to step S20, where the MC is counted up by one. That is, MC → MC + 1. And
Proceeding to step S21, the displayed counter is also incremented by one.
And

On the other hand, [M +] or [M
If it is determined that there is no key input of-] and that no numerical value is input to the memory 13g, the process proceeds to step S17, where a numeral is set, [M +] or [M-].
Other operator keys were entered, or
It is determined whether a numerical value is not stored in the memory 13g even when [M +] or [M-] is input by a key, and if such a determination is made, the MC is not counted up, and the counter processing ends.

On the other hand, if the opposite determination is made in step S17, the process proceeds to step S18, where [C]
It is determined whether or not the key or the [CM (clear memory)] key is set. If it is determined that the key is set, the process proceeds to step S19, where the [C] key is set. In this case, the display of the counter for the previously calculated expression is cleared, and when the [CM] key is set, the contents of the memory 13g are cleared. Therefore, MC is set to 0, and then the process proceeds to step S21, where the display counter is also set to 0.

Next, referring to FIG. 4, an operation example of the electronic desk calculator 1 according to the first embodiment will be described in the case of displaying an IC (FIG. 1A).
To (14)), in the case of GC display ((15) to (2) in FIG.
5)) and in the case of display of MC ((26) to (3) in FIG.
6)) will be described.

First, FIGS. (1), (15) and (26) of FIG.
Shows the screen of the display device 2 in the initial state before the calculation, and in each of the IC, GC, and MC displays, 0 is displayed in both the numerical value part and the counter part.

FIGS. 2 (2), (16) and (27) show screens after inputting 1 as the first numerical value of the expression to be operated. Numerical parts are 1. Is displayed, but all the counters remain at 0.

FIGS. 3 (3), (17) and (28) show screens after the remaining numeral 23 has been input. Numerical values are all 123. Is displayed, but all the counters remain at 0.

FIGS. 4 (4), (18) and (29) show the screen after the [+] key, which is the first operator of the equation, is input. Only 1 is displayed on the IC display in FIG.

FIGS. 5 (5), (19) and (30) show the screen after inputting 456 as the next numeral. Numerical values are all 456. Is displayed, and the counter section of FIG.

FIGS. 6 (6), (20), and (31) show the screens after the [=] key is input to obtain the operation result. As shown in FIG. 6C, the number of ICs in the counter section is 2. In the GC display of FIG. 20, 1 which is the count number for which the calculation result was obtained is displayed on the counter section.

FIG. 7 (7) shows a screen after inputting 9 as the next initial numeral. The counter keeps 2.

FIG. 8 (8) shows that the operation is continued and
The screen after inputting [-] is shown. The counter section is incremented by 1 and 3 is displayed.

FIG. 9 (9) shows that the operation is further continued to
4 shows a screen after inputting [=]. The counter section is incremented by +1 to display four.

FIG. 10 shows the screen after the [+] key is input. The counter section is incremented by one, and 5 is displayed.

FIG. 11 (11) shows that the operation is further continued and
1 shows a screen after key input of [=]. The counter section is incremented by 1, and 6 is displayed.

FIG. 12 (12) shows the screen after the [C] key is input to clear the counter once.
Both the numerical value part and the counter part become 0.

FIG. 13 (13) shows a screen after calculating a square of 2 as an operation and inputting 2 [×] [=] by key. In this case, there are two operators, [×] key and [=] key.
The counter is 2.

FIG. 14 shows that when the [=] key is pressed thereafter, the multiplication of 2 is repeated and the 2 n -th power can be calculated. The counter section is incremented by 3, and 5 is displayed.

FIG. 21 shows the next operation, 9
13 shows a screen after key input of [x]. The counter is still at 1.

FIG. (22) shows that the operation is continued for 8
7 shows the screen after key input of 7 [%]. in this case,
Since the calculation result is obtained, the counter section is incremented by one, and the display becomes 2.

FIG. 23 shows that the operation is continued and 654
The screen after the key input of [=] is shown. The counter section is incremented by +1 to display three.

FIG. 24 (24) shows the screen after the key "C" has been input to clear the counter portion. Both the numerical value part and the counter part become 0.

FIG. 25 (25) shows a screen after calculating a square of 2 as an operation and inputting 2 [x] [=] by key.
In this case, since the calculation result has been obtained, the counter is displayed as 1.

FIG. 32 shows that the next operation is 9 [M
+] Shows the screen after key input. Since the numerical value has been stored in the memory 13g, the counter section displays "1".

FIG. 33 (33) shows that the operation is continued and 2
13 shows a screen after key input of [x]. The counter is still at 1.

FIG. (34) shows that the operation is further continued for 3
13 shows a screen after key input of [M +]. in this case,
Since the numerical value is stored in the memory 13g, the counter is set to +1 and the display becomes 2.

FIG. 35 (35) shows that the operation is further continued for 8
13 shows a screen after key input of [M−]. in this case,
Since the numerical value is stored in the memory 13g, the counter is set to +1 and 3 is displayed.

FIG. 36 (36) shows the screen after the [CM] key has been input to clear the memory.
The counter becomes zero.

(Embodiment 2) FIGS. 5 to 7 show Embodiment 2 of the electronic desk calculator of the present invention. In the electronic desk calculator of the second embodiment, as shown in FIG. 5, a [counter] key 31 is provided on the keyboard 3, and when this [counter] key 31 is input by a key, as shown in FIG. MC
Are designated sequentially in the order of IC → GC → MC → IC →... This point is different from the electronic desk calculator of the first embodiment. Note that the same reference numerals are given to portions corresponding to the configuration of the first embodiment,
A duplicate description is omitted.

Next, a control procedure in the counter control will be described with reference to FIG. CPU11 is ROM1
When the program for controlling the counter stored in the display device 2 is started, first, in step S31, a key input process of the user is waited, and the IC card is displayed on the display screen of the display device 2.
It is determined whether or not the count is displayed. That is,
In the electronic desk calculator 1 of the second embodiment, IC, G
The count display of C or MC is performed by the operation of the [Counter] key 31 by the user.
This is because the user looks at the current screen of the display device 2 to make the determination.

At step S31, the counter display indicates I
If it is determined to be C, the process proceeds to step S32, and here, the input of the [counter] key 31 by the user is waited. When the user wants to display the IC, he or she does not input the [Counter] key 31. In this case, FIG.
The process proceeds to step S2, and the processes after step S2 are performed (step S33).

In step S32, the user
When C is desired to be displayed, the [Counter] key 31 is input by a key. In this case, the process proceeds to step S9 in FIG. 3, and the processes after step S9 are executed (step S3).
6).

On the other hand, if it is determined in step S31 that the counter display is not IC, the process proceeds to step S34, where it is determined whether the counter display is GC. If it is determined that the counter display is GC, the process waits for a key input of the [counter] key 31 by the user in step S35. The user does not input the [Counter] key 31 in the case of GC, but inputs the [Counter] key 31 in the case of MC. If there is no key input, the user executes the processing from step S9 in FIG. (Step S36) If there is a key input, the processing after step S16 in FIG. 3 is executed (step S39).

If it is determined in step S34 that the counter display is not GC, the process proceeds to step S37, where it is determined whether the counter display is MC. Then, if it is determined that it is MC, step S3
Go to step 8, where the [Counter] key 3
Wait for 1 key input. The user does not input the [Counter] key 31 in the case of MC, and inputs the [Counter] key 31 in the case of IC. If there is no key input, the process from step S16 in FIG. 3 is executed. (Step S39) If there is a key input, Step S2 in FIG.
The subsequent processing is executed (step S39).

Next, an example of the operation of the electronic desk calculator 1 according to the second embodiment, that is, a change in the display screen when the [Counter] key 31 is pressed with a key will be described with reference to FIG.

As shown in the left column of FIG. 7, when the display mark ▲ is located at the position of IC among IC, GC, and MC and the counter display indicates IC, from this state, ( As shown in 1), the user sets [Counter]
When the key 31 is keyed, the display mark ▲ moves to the position of GC, and the counter display shows GC.

From this state, as shown in FIG.
When the user inputs the [Counter] key 31,
The display mark ▲ moves to the position of MC, and the counter display indicates MC. Thereafter, as shown in FIG. 3C, when the user further inputs the [Counter] key 31, the display mark ▲ is displayed as shown in the left column of FIG.
Moves to the position of the IC, and the counter display indicates the IC.

[0078]

According to the above electronic desk calculator of the present invention,
If the designated switch is operated by a key, how many times the calculation was executed by inputting the operator key, how many times the calculation result was obtained by inputting [=] or [%], or [M +] Or, by inputting [M-] as a key, it is possible to selectively display on the counter display screen how many times the addition and subtraction have been executed with respect to the memory. It is possible to easily grasp the current calculation position.

As a result, according to the electronic desk calculator of the present invention, it is possible to reliably solve the problem that the calculation position is not known during the calculation, so that the function and operability can be greatly improved.

Further, according to the electronic desk calculator of the present invention, each time the designation switch is inputted, the counter is sequentially switched in the order of item counter → ground total counter → memory counter → item counter, and the designated counter is designated. Since the counter count is displayed on the display screen, it is possible to easily understand what counter is currently displayed. Therefore, there is an advantage that operability can be further improved.

[Brief description of the drawings]

FIG. 1 is an external view of an electronic desk calculator according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a system configuration of the electronic desk calculator according to the first embodiment of the present invention.

FIG. 3 is a view showing an operation example of the electronic desk calculator according to the first embodiment of the present invention.

FIG. 4 is a flowchart illustrating a control procedure of a CPU in counter control according to the first embodiment of the present invention.

FIG. 5 is an external view of an electronic desk calculator according to a second embodiment of the present invention.

FIG. 6 is a flowchart illustrating a control procedure of a CPU in counter control according to the second embodiment of the present invention.

FIG. 7 is a change diagram of a display screen according to the second embodiment of the present invention.

FIG. 8 is an external view of a conventional electronic desk calculator.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 electronic desk calculator 2 display device 3 keyboard 4 switch 11 CPU 12 ROM 13 RAM 13a X register 13b Y register 13c display counter 13d item counter 13e ground total counter 13f memory counter 13g memory 13h GT memory 13i operator flag 13j status flag 31 counter Key 41 counter switch

Claims (2)

[Claims] 1. An item counter that counts the number of calculations each time an operator key is input, a grand total counter that counts the number of calculations each time a calculation result is obtained, and a number of times that is added or subtracted from a memory. A memory counter for counting, a designation switch for selecting one of the item counter, the grand total counter or the memory counter, and a display screen for displaying the count number of the counter designated by the designation switch An electronic desk calculator provided with control means for displaying a counter on the top. 2. Every time the designated switch is input, the counter is sequentially switched in the order of an item counter, a grand total counter, a memory counter, and an item counter, and the count of the designated counter is displayed on the display screen. 2. The electronic desk calculator according to claim 1, wherein: