CN2211619Y

CN2211619Y - Special calculator for value-added tax

Info

Publication number: CN2211619Y
Application number: CN 94240787
Authority: CN
Inventors: 马青山
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-06-19
Filing date: 1994-06-19
Publication date: 1995-11-01
Anticipated expiration: 2004-06-19

Abstract

A special calculator for value-added tax belongs to the computer field and is mainly used for calculating the value-added tax. It is characterized by that on the panel of computer shell there are special keys for price tax, money amount, tax amount and unit price, and its core is formed from central processing integrated block, address latch integrated block, program memory integrated block, MOS switch, driver, resistance capacitor, crystal oscillator, data memory and decoder which are mounted on two printed circuit boards according to the circuits I-VIII. The method has the advantages of economy, practicality, small size, convenient carrying, simple operation and easy learning, can quickly and accurately calculate and display the value-added tax of the enterprise according to the new tax law of China, is favorable for tax collection and paying, enterprise management and the like.

Description

Special calculator for value adding tax

A kind of value added tax special calculator belongs to field of computer technology, is exclusively used in the corporate tax people and the people that collects taxes calculates corporation tax rapidly and accurately according to new tax law.

Calculating corporation tax in prior art generally is to use written calculation, rechoning by the abacus or general-purpose calculator to calculate.Count speed slow like this, be not easy to miscalculate, how calculated enterprise and stood to lose, lacked country and stood to lose, tend to therefore cause unnecessary together dispute.

It is a kind of economical and practical, small and exquisite that the purpose of this utility model is to provide, and is easy to carry, and special data processor can calculate corporation tax quickly and accurately by new tax law value added tax special calculator has been solidified in easy and simple to handle, easy.

Regulation according to relevant value added tax in computer based present principles and China new tax law, at the subject matter that exists in the prior art, basic design of the present utility model is: transformed on the basis of known general pocketronic, adopt cmos device to constitute hardware system, design one cover exclusive data handling procedure is solidificated in the movement, contains duty receipt valency X and the input of sales volume Y data to finish, contain tax consumption sum A=XY, do not contain tax consumption sum B=A/(1+17%) and do not contain calculating and storages such as duty receipt valency C=B/Y and output tax gold D=B.17%, show, operations such as automatic consolidation.

Of the present utility modelly be characterised in that described value added tax special calculator is made of the casing that has external electric supply socket, LCD, finger-board, movement, power supply and battery case; Its prominent feature is: its above-mentioned liquid crystal shows that device is made up of the LCD utmost point and the LCD MODULE and the internal memory character formula generator ROM that are loaded on this backboard face (i.e. the inside); Its above-mentioned finger-board is by base plate conductive film, isolated film sheet and mark power key OFF/ON respectively; Special-purpose bond valence tax (valency tax totals), the amount of money (not containing the tax consumption sum), the amount of tax to be paid (value added tax taxes on sales), unit price (not containing the duty receipt valency) and input (acknowledgement key before input unit price and the quantity), standard universal key: MC(removing memory cell content), MR(demonstration memory cell content), M ⁺(displaying contents and the addition of memory cell content), M ^-(displaying contents and memory cell content are subtracted each other), C(remove the content of just keying on screen) and the AC(all clear, comprise the memory content), numerical key 0～9, calculation keys+,-, *, 28 buttons of ÷ and other keys " " "=" meter constitute, and above-mentioned isolated film sheet is between the lower end of above-mentioned base plate conductive film and above-mentioned each button; Its above-mentioned movement comprises by central authorities handles calculator chip and the resistance R that integrated package, address latch integrated package, memory under program integrated package, MOS switch and driver are formed ₁～R ₆, capacitor C ₁～C ₃, crystal resonator, data memory, code translator, restorer and standby extension memory constitute, each above-mentioned electronic devices and components are installed on the two bar printing wiring boards according to circuit I～VIII as shown in Figure 3, are welded to connect between machinery and the electronic circuit.

Above-mentioned circuit I～VIII as shown in Figure 3 comprises the central processing circuit I of being made up of central processing unit; The address latch circuit II of forming by address latch; The program storage circuit III of forming by memory under program; By display module and resistance R ₂The display circuit IV of forming; By button and resistor chain R ₃～R ₆The keyboard circuit V of forming; By crystal resonator, capacitor C ₁And C ₂Crystal oscillating circuit and the power circuit VI formed; By code translator, restorer, resistance R ₁And capacitor C ₃Decoding of forming and reset circuit VII and the expanding storage circuit VIII of forming by extension memory.

Outstanding advantage of the present utility model is: economical and practical, small and exquisite, not only available No. 5 batteries but also can connect civil power, both can carry again indoor, easy and simple to handle, Yi Xue, can calculate and demonstrate corporation tax quickly and accurately according to the relevant regulations of the new tax law of China, both be beneficial to personnel and the enterprise administrator of paying taxes of levying taxes, can avoid the various troubles that cause because of miscount again.

Accompanying drawing 1 is one of the utility model most preferred embodiment appearance structure synoptic diagram;

Accompanying drawing 2 is one of a utility model most preferred embodiment movement structure synoptic diagram;

Accompanying drawing 3 is two synoptic diagram of the utility model most preferred embodiment movement structure.

Accompanying drawing 4 is one of a utility model most preferred embodiment wiring diagram.

1 casing among the figure, 2 LCD, 3 finger-boards, 4 movements, 5 power supplys, 6 battery cases, 7 external electric supply sockets, 8LCD plate, 9 LCD MODULE, 10 base plate conductive films, 11 isolated film sheets, 12 buttons, 13 central authorities handle integrated package, 14 address latch integrated packages, 15 memory under program integrated packages, the 16MOS switch, 17 drivers, 18 resistance R ₁～R ₆, 19 capacitor C ₁～C ₃, 20 crystal resonators, 21 data memories, 22 internal memory character formula generator ROM, 23 code translators, 24 restorers, 25 standby expanding storages are suitable, I central processing unit circuit, II address latch circuit, III memory under program circuit, the IV display circuit, V keyboard circuit, VI crystal oscillating circuit and power circuit, VII decoding and reset circuit, VIII spare extension storage circuit.

With most preferred embodiment architectural feature of the present utility model further is summarized as follows in conjunction with the accompanying drawings: the casing 1 that adopts the engineering plastics injection-compression molding, its side is provided with external electric supply socket 7, the LCD plate 8 of the LCD 2 of employing large scale integrated circuit HD4478 is loaded on the top front face of casing 1, there is EA-16015AR LCD MODULE 9 at its back side (inner face), the battery case 6 that the baseplane of the casing 1 of relevant position is provided with and adorns No. 5 batteries of 4 joints is power supply 5, the finger-board 3 that adopts 4 * 4 conductive rubbers to have 28 buttons 12 is contained in the front, bottom of casing 1, and its inside is provided with isolated film sheet 11 and base plate conductive film 10 successively; Central authorities handle integrated package 13 and adopt 80C31, and address latch integrated package 14 is selected 74HC373 for use, and memory under program integrated package 15 is selected 27C64 for use, and MOS switch 16 is selected the FET power-supply controller of electric for use, and driver 17 is selected 74HC244 for use, and resistance 18 adopts R ₁=10K, R ₂=20K, R ₃=R ₄=R ₅=R ₆=10K, electric capacity 10 adopts C ₁=C ₂=68P, C ₃=12 μ F, crystal resonator 20 is selected 6MHZ for use, data memory 21 selects 6264 for use, code translator 23 and restorer 24 are selected 74HC00～74HC04 for use, spare extension memory 25 is selected 27C64 for use, they all are installed on two printed-wiring board (PWB)s that are fixed in the casing 1 that are arranged above and below according to circuit I～VIII shown in the accompanying drawing 3 forms movement 4, is welded to connect between machinery and the electronic circuit.

As this enforcement change just:

1. the large scale integrated circuit HD4478 of display 2 can be replaced by KS0062;

2. spare extension memory 25 can replace with 6264RAM.

3. the shape of the starting material of finger-board and each button can suitably change, and other electronic devices and components all can be done equivalent the effect and replace.

Claims

1, a kind of value added tax special calculator, constitute by the casing that has external electric supply socket [7] [1], LCD [2], finger-board [3], movement [4], power supply [5] and battery case [6], of the present utility modelly be characterised in that described value added tax special calculator, its above-mentioned LCD [2] is by LCD plate [8] and be loaded on the LCD MODULE [9] and the internal memory character formula generator ROM[22 of this backboard face] form; Its above-mentioned finger-board [3] is made of base plate conductive film [10], isolated film sheet [11] and the button [12] that marks characters such as OFF/ON, valency tax, the amount of money, the amount of tax to be paid, unit price respectively, and isolated film sheet [11] is positioned between the lower end of base plate conductive film [10] and each button [12]; Its above-mentioned movement [4] comprises that central authorities handle calculator chip and resistance R that integrated package [13], address latch integrated package [14], memory under program integrated package [15], MOS switch [16] and driver [17] are formed ₁～R ₆[18], capacitor C ₁～C ₃[19], crystal resonator [20], data memory [21], code translator [23], restorer [24] and standby extension memory [25] constitute, each above-mentioned electronic devices and components are installed on the two bar printing wiring boards according to circuit I～VIII, are welded to connect between machinery and the electronic circuit.

2, value added tax special calculator according to claim 1 is characterized in that above-mentioned circuit I～VIII, comprises the central processing circuit of being made up of central processing unit ［ I ］; The address latch circuit of forming by address latch ［ II ］; The program storage circuit of forming by memory under program ［ III ］; By display module and resistance R ₂The display circuit of forming ［ IV ］; By button and resistor chain R ₃～R ₆The keyboard circuit of forming ［ V ］; By crystal resonator and capacitor C ₁And C ₂Crystal oscillating circuit and the power circuit ［ VI ］ formed; By code translator, restorer, resistance R ₁And capacitor C ₃Decoding of forming and reset circuit ［ VII ］ and the spare extension storage circuit of forming by the spare extension memory ［ VIII ］.