CN87210648U - Electronic calculator for blind person - Google Patents
Electronic calculator for blind person Download PDFInfo
- Publication number
- CN87210648U CN87210648U CN 87210648 CN87210648U CN87210648U CN 87210648 U CN87210648 U CN 87210648U CN 87210648 CN87210648 CN 87210648 CN 87210648 U CN87210648 U CN 87210648U CN 87210648 U CN87210648 U CN 87210648U
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- China
- Prior art keywords
- electronic calculator
- blind person
- braille
- circuit
- blind persons
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model provides an electronic calculator for blind persons, which is accomplished by configuration a braille logic circuit, reading position control keys, a touching device and a buzzer on the existing electronic calculator. The electronic calculator for blind persons not only can visually display computed results, but also can display the computed results which are easily received by blind persons by combining the touching device and the buzzer. Therefore, the electronic calculator for blind persons not only can be used by blind persons, but also can be used normal persons who help the blind persons. The electronic calculator for blind persons has simple structure, complete function, flexible and convenient use; the electronic calculator for blind persons can make blind persons carry out various complicated mathematical calculations.
Description
The utility model belongs to a kind of blind person and uses the mathematical computations instrument.
In the today that enters computer age, the use of electronic calculator has been quotidian thing, and its functional type of the electronic calculator that is occurred opinion is various.Yet the output of its result of calculation of existing electronic calculator is to show by photoelectric numeral tube, and this have to " be deeply aware of one's own helplessness when faced with a great task " for the blind person that can only receive information by means of sense of touch and the sense of hearing.Mainly finish by mental arithmetic when the blind person performs mathematical calculations at present, and can not carry out than the complex mathematical computing, this work and teaching to the blind person brings many difficulties.
Based on above-mentioned situation, goal of the invention of the present utility model be to provide a kind of have can make the blind person accept the electronic calculator of sense of touch and auditory function.
To achieve these goals, the blind person that provides of the utility model finishes by means of existing electronic calculator (hereinafter to be referred as " former counter ") with electronic calculator.Its primary structure comprises that former counter, braille logic card, reading position operating key, blind person's numeral touch device and hummer, and the output signal of keyboard input circuit in the former counter and logical circuit (LSI) is input to the braille logical circuit, touches device and hummer by the control of braille logical circuit.Further described below in conjunction with accompanying drawing.
Fig. 1 is that blind person provided by the utility model schemed with the electronics calculator structure;
Fig. 2 is the structural drawing of blind person with touch device in the electronic calculator;
Fig. 3 is the circuit block diagram of blind person with electronic calculator.
Blind person provided by the utility model according to shown in Figure 1, is provided with former counter (2), touch device (8), shift key (9), multiple high level key (10), hummer (11) and braille logic card (12) with its structure of electronic calculator on housing (13).The utility model exchanges in order to make, DC dual-purpose, and this housing is provided with power switch (1), AC Power supply socket (3), Direct current power source socket (4) and fuse (5), and disposes corresponding rectifier transformer (6) and rectification circuit plate (7).In order to make the blind person be convenient to import data and calculating, on keyboard (14) surface of former counter, corresponding tactile sign is set, touch on the device in blind person's numeral by multiple high level key and shift key and read its result of calculation by turn.When result of calculation radix point occurred or reads the last position data by shift key, hummer just sent different sound equipments.
Because the digital blind symbol of braille word only can be represented any numeral of 0～9 with four some positions, thereby the touch device is provided with four touch posts moving up and down, and each touches post by special electromagnetic relay control, therefore touch device and comprise four relays compositions, its structure is made of moving weighing apparatus iron plate (16), yoke framework (21), the spring (23) that is stretched of band touch post (15) and the line bag (19) that is wrapped on the iron core (17) according to shown in Figure 2.Pad (18), (20) are used for fixing the line bag, and bolt (22) is used for fixing.The touch post that becomes on the moving weighing apparatus iron plate according to the switching value signal that inputs to solenoid moves up and down signal, and the four way switch amount code signal that just the braille logical circuit can be translated becomes the output of braille digital signal.
The blind person that the utility model provides uses electronic calculator according to circuit block diagram shown in Figure 3, the signal that keyboard input circuit (27) in the former counter and logical circuit (26) are exported is input to the braille logical circuit when being input to fluorescence display circuit (25), touch device (34) and hummer (35) by the control of braille logical circuit, and power circuit (24) provides each several part required power supply.The braille logical circuit comprises digit selector (28), latch (29), code translator (30), driver (31), feedback circuit (32) and acoustics circuit (33).The utility model is exported long number because of adopting a touch device, thereby by the definite position (P that will export of digit selector
i).This digit selector begins gating from fluorescence display most significant digit control gate signal, utilizes shift key can only select adjacent next bit control gate signal at every turn, uses multiple high level key then can under any circumstance all select most significant digit control gate signal.When if most significant digit is the room, digit selector can be selected next bit control gate signal automatically by feedback circuit.Latch (29) is the pulse signal that utilizes the control gate of digit selector output, at the stroke (S of selected bits
j) signal moment of occurring, with its raster signal and radix point (D
p) signal latch gets up, and the static stroke code of output uses for code translator.
Code translator is the S with former counter
1～S
7All raster signal converts the braille code signal to.Be specially S
1～S
7" seven sections " stroke "
" be reduced to " four sections " stroke "
", and be defined as successively 0,1,2,3,4,5,6,7,8,9
, can get the signal of needed four raster signals of braille numeral and negative sign "-" thus.Owing in computation process, index can occur, and a room is arranged before the index in the former counter, be i.e. S
1～S
7All do not show, but in this decoding scheme, can obtain character for "
" signal of (a bit outstanding), and a certain connotation do not given in this character in braille, therefore the utility model with Braille "
" be defined as " sky ", make the blind person correctly read power exponent with this.
As previously mentioned, the blind person feels that external information can be by means of the sense of hearing and sense of touch.The touch device can help the blind person to touch and read the braille numeral, and hummer then can help the blind person to judge input data cases (button sound equipment), radix point (radix point sound equipment) and lowest order (lowest order sound equipment) from the another side.Therefore, acoustics circuit comprises button acoustics circuit, radix point acoustics circuit and lowest order acoustics circuit, makes three kinds of different sound equipments of the correct judgement of blind person thus.
Use electronic calculator according to above-mentioned blind person, be characterized in not only on the optical display of former counter, can showing result of calculation, and touch device and combine with hummer and can show the acceptable result of calculation of the blind person that sends as an envoy to, thereby both can blind person's use also can the normal person help the blind person to use.With the exception of this, this blind person has kept former calculator function with electronic calculator, thereby makes the blind person can carry out complicated various mathematical operations.This shows that this blind person simple in structure, multiple functional, flexible and convenient to use uses electronic calculator, will bring positive social effect the educational undertaking that promotes the blind person.
Embodiment of the present utility model:
According to Fig. 1, Fig. 2, shown in Figure 3, former counter adopts CASIO board fx-120 electronic calculator.
Claims (4)
1, a kind of blind person improves former counter and make with electronic calculator, it is characterized in that comprising braille logic card, reading position operating key, blind person's numeral touch device and hummer, and the output signal of keyboard input circuit in the former counter and logical circuit is input to the braille logical circuit, touches device and hummer by the control of braille logical circuit.
2, use electronic calculator according to the described blind person of claim 1, it is characterized in that the braille logic card comprises digit selector, latch, code translator, driver, feedback circuit and acoustics circuit, driver is connected and is touched device, and acoustics circuit is connected hummer.
3, use electronic calculator according to claim 1 or 2 described blind persons, it is characterized in that described touch device touches moving weighing apparatus iron plate, yoke framework, the spring that is stretched of posts by four bands and is wrapped in the electromagnetic relay that the line bag on the iron core constituted to form.
4, form by multiple high level key and shift key according to the described reading of claim 1 position operating key.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87210648 CN87210648U (en) | 1987-10-17 | 1987-10-17 | Electronic calculator for blind person |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87210648 CN87210648U (en) | 1987-10-17 | 1987-10-17 | Electronic calculator for blind person |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN87210648U true CN87210648U (en) | 1988-07-06 |
Family
ID=4825562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87210648 Withdrawn CN87210648U (en) | 1987-10-17 | 1987-10-17 | Electronic calculator for blind person |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN87210648U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101702267B (en) * | 2009-09-17 | 2011-12-21 | 杭州六易科技有限公司 | Electronic reading and inputting device specially used for blind person |
| KR102436912B1 (en) * | 2021-02-23 | 2022-08-25 | 금오공과대학교 산학협력단 | Display of Braille and Calculator including the same |
-
1987
- 1987-10-17 CN CN 87210648 patent/CN87210648U/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101702267B (en) * | 2009-09-17 | 2011-12-21 | 杭州六易科技有限公司 | Electronic reading and inputting device specially used for blind person |
| KR102436912B1 (en) * | 2021-02-23 | 2022-08-25 | 금오공과대학교 산학협력단 | Display of Braille and Calculator including the same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |