CN2226782Y - Special-purpose calculator for making out value-added tax bill - Google Patents

Abstract

The special-purpose calculating device for value-added tax of the utility model comprises a keyboard which is composed of digit keys, calculating keys, keys for the entry of the tax rate, keys for checking continuous item, summation keys, item clearance keys, all clearance keys, etc. The special-purpose calculating device for value-added tax also comprises a switch system which is composed of a select switch for the tax rate and a select switch for the unit price, and at least three display screens. The value-added tax of each transaction just needs to be calculated by the first multiplication, and the data which need to be recorded can be displayed simultaneously. The total for a plurality of trades can also be simultaneously displayed on the three display screens, and only a key needs to be pressed. The data of every step can be checked item by item through the keys for checking continuous item. Therefore, the calculation of the calculator is quick, the checking is convenient, the time for opening can be shortened further, and the operation error can be reduced.

Description

A kind of counter of opening VAT invoice that is exclusively used in

The utility model relates to a kind of counter of opening VAT invoice that is exclusively used in.

Adopt common counter to open VAT invoice, according to reflection, very easily make mistakes, very time-consuming again, so the computing mistake just occurred being intended to reduce, shorten and open the special calculator of time, these special calculators are not all jumped out the circle that single display screen shows item by item in design, and arithmetic operation still must repeatedly carry out, therefore, it is time-consuming that computing is still felt, also unavoidable mistake.

The purpose of this utility model provides and a kind ofly can further shorten the time of opening, and reduces the counter of opening VAT invoice that is exclusively used in of computing mistake.

The utility model also has the tax rate and inserts key, continuous item/check key, total key, Xiang Qingjian and total clear key, and be provided with at least three display screens in the digital display circuit except also having numerical key, calculation keys, single chip microcomputer and digital display circuit.

Further program of the utility model is that 17% autonomous tariff/other flexible tariff selector switch or 17% autonomous tariff/other flexible tariff/common computing selector switch are set.

The utility model further scheme is to be provided with to contain duty receipt valency/do not contain duty receipt valency selector switch.

Further illustrate detailed content of the present utility model below in conjunction with drawings and Examples.

Fig. 1: frame principle figure of the present utility model;

Fig. 2: circuit theory diagrams of the present utility model;

Fig. 3: the utility model product design design sketch plan.

As shown in the figure, the utility model has the current techique feature of counter as a kind of counter: numerical key 1, calculation keys 2, single chip microcomputer and digital display circuit; Value-added tax calculator as a kind of special use, also have key and the switch newly established below: the tax rate is inserted key 3, continuous/check key 4, add up to key 5, Xiang Qingjian 6 and total clear key 7, and 17% autonomous tariff/other flexible tariff selector switch or 17% autonomous tariff/other flexible tariff/common computing selector switch 8 and contain duty receipt valency/do not contain duty receipt valency selector switch 9, in addition, the most basic feature of the utility model is to be provided with at least three display screens 10 in the digital display circuit, above-mentioned selector switch 8 is for the autonomous tariff in the value added tax 17% and special calculator is made common computer use ad hoc, when soon selector switch 8 placed 17% position, one of them display screen 10 promptly showed 17 on the position of the tax rate; If selector switch 8 is placed the flexible tariff position or for the special calculator of not establishing selector switch 8, any tax rate all will just can be presented on the display screen 10 by inserting key 3 by the numerical key 1 and the tax rate; If selector switch 8 is placed common work location, can make common counter and use, for this reason, also can set up the universal key that some are used for common computing, as % key, M+ key, M-key, MRC key or the like; And adopt the data in other two display screens, the 10 difference display digit mathematical operations and import the data that counter stores.Above-mentioned selector switch 9 is ad hoc for direct employing does not contain the duty receipt valency, promptly under the known situation that does not contain the duty receipt valency, selector switch 9 at first should be allocated to the position that does not contain the duty receipt valency, but in the bargain transaction of the overwhelming majority, the unit price of employing is to contain the duty receipt valency, at this moment, selector switch 9 should be allocated to the position that contains the duty receipt valency, certainly, concerning only being suitable for the special calculator that contains the duty receipt valency, selector switch 9 just needn't be provided with.Behind the position and import tariff of having preset above-mentioned selector switch 8 and 9, VAT invoice be can enter and the input and the operation stages of column number certificate respectively put down in writing, at first press numerical key 1, the input unit price, its data presentation is on second display screen 10, press " * " key in the calculation keys 2 then, press numerical key 1 again, input quantity, its data presentation is on the 3rd display screen 10, press "=" key in the calculation keys 2 at last, on three display screens, show the data that do not contain the duty receipt valency at once simultaneously, the data of the amount of money and the data of the amount of tax to be paid, the duty receipt that do not contain wherein is worth, amount of money value and amount of tax to be paid value must be inserted in the VAT invoice in the first stroke dealing, before the input and computing that change the second or the 3rd transaction over to, must be earlier by continuous/check key 4, continue item, repeat above-mentioned steps then, be computing at last and fill in the amount of money and add up to, the amount of tax to be paid adds up to and tax adds up to, at this moment, only must press total key 5, the data of above-mentioned three totals promptly are presented at respectively on three display screens 10.Continuous/another function of checking key 4 is whether check the input of each step correct, clicking the data that show a step supplies to check, by that analogy, as the input data of finding a certain step are wrong, then press earlier Xiang Qingjian 6, after eliminating these data, re-enter the data of modification, and be presented on the display screen 10.Opening an invoice, changing over to and open before second invoice, eliminate the total data of first invoice that has stored in the counter earlier by total clear key 7.For the ease of distinguishing the implication of every item number certificate on the display screen 10, the utility model also can increase following technical characterictic: above or below every item number certificate of three display screens 10 Chinese prompt data presentation 11 is set, and on a display screen 10 every transaction transaction sequence number data presentation 12 is set therein.Wherein always clear key 7 and continuous/demonstration when checking key 4 are being pressed respectively in Chinese prompt " tax rate ", " unit price ", " quantity " and sequence number " 1 ", " 2 ", " 3 " etc., Chinese prompt " does not contain the duty receipt valency ", show during " amount of money " and " amount of tax to be paid " "=" key in pressing calculation keys 2, and Chinese prompt " tax total ", " amount of money total " and " amount of tax to be paid total " show when adding up to key 5 pressing.In addition, the known technology of using on the counter such as clock demonstration, sounding alarm etc. all portable on special calculator described in the utility model.The data command that above-mentioned key display is sent is presented on the display screen 10 by the driving core body in the digital display circuit after single chip microcomputer is handled, present embodiment adopts 8031 to make single-chip microcomputer, adopt 2732 4KROM to make the external program memory, 6116 2KRAM make the external data memory, 74HC373 makes the 8D latch, and composition single chip microcomputer, adopt and make chip for driving for two 7225, can be with 8031,2732,6116 and 74HC373 be integrated into the single chip microcomputer of a slice special use, with two 7225 chip for driving that are integrated into a slice special use, like this, the integrated program of counter improves, and volume can reduce.

In sum, the utlity model has following characteristics: the one, every transaction only must Make once simple multiplication and calculate, can show simultaneously three item number certificates of needs record: Unit price, the amount of money and the amount of tax to be paid, and data can be stored; The 2nd, three totals of several transactions Data: amount of tax to be paid total, amount of money total and valency tax total only must be pressed a key can be simultaneously Be presented on three display screens; The 3rd, every data of every transaction can be checked modification, Therefore, employing the utility model carries out the calculating of VAT invoice and opens, because of operation Step is few, and fast operation is checked modification just, so can further shorten issuing invoice Time and reduce the computing mistake.

Claims (3)

1, a kind of counter of opening VAT invoice that is exclusively used in, have numerical key, calculation keys, single chip microcomputer and digital display circuit, it is characterized in that: also have the tax rate and insert key (3), continuous item/check key (4), total key (5), Xiang Qingjian (6) and total clear key (7), and be provided with at least three display screens (10) in the digital display circuit.

2, counter according to claim 1 is characterized in that: be provided with 17% autonomous tariff/other flexible tariff selector switch or 17% autonomous tariff/other flexible tariff/common computing selector switch (8).

3, counter according to claim 1 and 2 is characterized in that: be provided with and contain duty receipt valency/do not contain duty receipt valency selector switch (9).

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