CN2410698Y

CN2410698Y - Braille alphabet reading device

Info

Publication number: CN2410698Y
Application number: CN 00206372
Authority: CN
Inventors: 赵宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-03-17
Filing date: 2000-03-17
Publication date: 2000-12-13
Anticipated expiration: 2010-03-17

Abstract

The utility model relates to a braille reading device, which comprises a control circuit and a reading board, wherein, the control circuit comprises a controller composed of a counter and a decoder, a flip-latch and a cushioning driver. A touching device is composed of a movable inner core and a hollow frame, wherein, the upper end part of the hollow frame is correspondingly fixed with a panel, and the movable inner core is arranged in the hollow frame. The upper end part of the movable inner core is a touching head, the lower end is extended out of the hollow frame, and the end part of the movable inner core is provided with a positioning protrusion. Using the device of the utility model, the printing, the propagation and the publication of the braille can be accelerated. Thereby, the utility model is favorable to the cultural education of the braille.

Description

The Braille reading device

The utility model relates to a kind of Braille reading device, belongs to the educational facilities technical field.

The blind person can not read general books, newpapers and periodicals, computer screen display message etc. and obtain the written historical materials of information with vision, and can only read the written historical materials of Braille writing.Braille claims braille again, and international braille is that basic structure is formed by 6 smooth round dots of projection, is to specialize in the blind person to touch the letter symbol of reading, writing.Through constantly developing and improveing, the braille scheme that is proposed and formally ratified by relevant departments such as Ministry of Civil Affairs, State Education Commission by China Disabled Persons' Federation is " a Chinese double-spelling braille scheme " at present.Its basic characteristics are that the reality with the blind symbol of two sides spelling Chinese has syllable (with first party spelling initial consonant, with second party spelling simple or compound vowel of a Chinese syllable), are a kind of alphabetic writings.Because braille can only be by the blind person by Fingertip touch, a blind symbol of a blind symbol perception and touch and read, therefore, word link writing becomes an important foundation of Chinese braille.So-called participle is promptly separately write speech one by one, and so-called write the two or more syllables of a word together are the singularity according to braille, avoid syllable structure too loose, be convenient to touch and read, some speech are linked up write, like this, just improved braille, improved the reading rate of braille in the accuracy of expressing on the meaning of one's words.

But, at present, except books printed in braille, the information that braille of no use is represented in the daily life.And books printed in braille (form with thick ox degree paper bookbinding, prick out small embossment with card punch on paper, carry out Braille writing) publication kind is few, devoid of matter, single, frequence of issue is long, and making is wasted time and energy, effective poor, make vast blind people know information faces narrow, the quantity of information of obtaining is few.

The purpose of this utility model provides a kind of Braille reading device, makes the blind person just can obtain originally the information that need just can obtain with vision by it.

The Braille reading device of the utility model design comprises control circuit and reads plate.Control circuit comprises controller, latch and the buffering driver of being made up of counter and code translator, controller wherein is by the signal of computer interface reception from computing machine, and gating signal is added on the latch, latch is read plate by buffering driver control.Read plate and comprise touch device, panel and base plate, touching device becomes the triplex row arrangement to be arranged between panel and the base plate according to the braille design feature, touching device is made up of movable inner core and hollow frame, the upper end of hollow frame and panel relative fixed, movable inner core places in the hollow frame, the upper end of movable inner core is for touching head, hollow frame is stretched out in the lower end, its end is provided with locator protrusions, locator protrusions is positioned on the base plate, the outside of hollow frame is wound with control coil, and the buffering driver of this coil and control circuit joins.

Utilize the reading device of the blind person of aiming at of the present utility model design, the printing of the braille that can greatly accelerate, propagation, publication, thus help the culture and education of braille.

Description of drawings:

Fig. 1 is reading device control block diagram.

Fig. 2 is for reading the plate structure synoptic diagram.

Fig. 3 is the A-A sectional view of Fig. 2, touches the structure of device with expression.

Fig. 4 is reading device control circuit figure.

Below in conjunction with accompanying drawing, introduce content of the present utility model in detail.

Fig. 1 in Figure 12, the 1st, panel, the 2nd, touch device, the 3rd, hollow frame, the 4th, touch head, the 5th, control coil, the 6th, movable inner core, the 7th, positioning convex, the 8th, connector lug, the 9th, base plate, the 10th, typewriting head, the 11st, armature, the 12nd, electromagnet, the 13rd, plane framework, the 14th, horizontal back-moving spring, the 15th, vertical back-moving spring, the 16th, the internal protrusion of plane framework.

Control circuit basic function in the Braille reading device of the utility model design is that the electric signal of computing machine output is read from computer interface, and makes it correctly to output on the touch device.Touching device is to utilize electromagnetic principle that above-said current signal is converted into mechanical motion, but produces the small embossment that some blind mans touch.

Reading device control circuit block diagram is as shown in Fig. 1 frame of broken lines.

Principle of work: control controller by computing machine by computer interface, make gating signal be added to successively on some latchs, can be by the latch of gating from reading of data on the data signal line, and latch.Like this, to data signal line transmission data, and some latchs of gating successively just can read in latch with the data on the data signal line and latch by constantly.And the output of each latch is connected on the connector lug 8 of reading plate touch device.Like this, just can produce different combination of protrusions thereby control the reading plate by computer control with which type of electric signal output and reaction.Status signal then feeds back to computing machine (passing through computer interface) with the duty of controller, so that computing machine is judged its duty.

Physical circuit is (Y wherein as shown in Figure 4 ₂→ Y ₁₅All be connected to latch, simply omit for being figure): controller goes out counter (LS161) and code translator (LS154) constitutes.Computing machine sends control signal by computer interface, and then counter is just counted, and count results is transferred to code translator, and code translator translates which latch of gating (LS174), and makes this gating signal effective.

Interface section PC standard parallel interface, data transfer direction is as follows:

Pin 1 2-9 10 11 12 13 14 15 16 17 18-25

Direction OUT OUT IN IN IN IN OUT IN OUT OUT GND

The 2-9 pin all can be used as the data carry-out bit, selects wherein 6 pins for use at this: the 2-7 pin.Except that the 2-9 pin, direction is that the pin of OUT all can be used as transmission of control signals, selects 1 pin, 14 pin, 16 pin as sending control signal, and all directions to be the pin of IN all can be used as status signal reads in pin, select 10 pin, 11 pin at this.

And port address is 0378H-037AH (this is the default value of PC), then by to 0378H port output byte being the level height on the may command pin 2-9, can read in 10-13 pin and 15 pin level height from the 0379H port, to 037AH port output byte, may command 1 pin, 14 pin, 16 pin, 17 pin level height.

The course of work of computer control digital circuit is:

1) parallel port 16 pin level recover high from high to low again, make counter O reset, i.e. Q _AQ _BQ _CQ _D=0000, then translate Y through code translator ₀=0, Y ₁→ Y ₁₅=1, simultaneously, latch all is cleared.

2) the computer sends the data (6) is to the 2-7 pin of parallel port, and like this, all there are data in the D1-D6 data input pin of all latchs.

3) parallel port 1 pin recovers high, from high to low again because Y ₀=0, have only connection Y ₀Rejection gate output terminal level from low to high, recover low again, and all the other rejection gates are because Y ₁→ Y ₁₅=1, then output terminal keeps 0, and then latch LS174 (1) just reads in data, the signal of D1-D6 occurs on Q1-Q6, and is latched.

4) parallel port 14 pin recover low from low to high again, counter meter 1 number, Q _AQ _BQ _CQ _D=1000, code translator translates Y ₁=0, Y ₀, Y ₂→ Y ₁₅=1,

5) the 2nd group of data (6) are sent on the 2-7 pin of parallel port.

6) parallel port 1 pin recovers high from high to low again, and make latch LS174 (2) read in data and latch, at this moment, just can the 2nd group of data of latch on the Q1-Q6 of latch LS174 (2).

7) at Y ₂→ Y ₁₅On all connect tangible as Y ₀, Y ₁The latch of last connection, their principle of work are all as above-mentioned.

8) as full 16 (LS161 is 4 digit counters, and maximum count value is 16), the then Q of counter meter _CC=1, parallel port 11 pin=1 has instruction to monitor parallel port 11 pin in the computer program at this moment, as long as parallel port 11 pin are 1, then termination sends data again to parallel port 2-7 pin automatically, reads so that if having time the touch device of latch control is touched.

9) touch read to finish after, original one direct low level parallel port 10 pin are connect high level (controlling a soft-touch control by the operator realizes), the instruction that monitors this pin is arranged in the computer program, it for high level then program will rerun, can will descend in 16 groups of data latchings such as the latch again, so circulation can be read in the information of computing machine output in the latch successively.

The concrete structure of Braille reading device is read plate and is comprised touch device 2, panel 1 and base plate 9 as shown in Figures 2 and 3.Touching device 2 becomes the triplex row arrangement to be arranged between panel 1 and the base plate 9 according to the braille design feature.Touching device is made up of movable inner core 6 and hollow frame 3, the upper end of hollow frame 3 and panel 1 relative fixed, movable inner core 6 places in the hollow frame, the upper end of movable inner core is for touching 4, hollow frame is stretched out in the lower end, and its end is provided with locator protrusions 7, and locator protrusions is positioned on the base plate 9, the outside of hollow frame is wound with control coil 5, and the buffering driver mandarin orange of this coil and control circuit connects.

The principle of work that touches device is: add power on signal at the coil lead two ends, promptly pass to electric current, then coil can produce magnetic field in hollow frame, movable inner core is (by being made by the material of magnetic field suction, as iron, steel) under the action of a magnetic field, just can move upward, be fixed together with movable inner core owing to touch head, then touch head and just can protrude hollow frame.Because movable inner core lower end is provided with positioning convex, then movable inner core can be owing to inertia moves to beyond the hollow frame, but the projection that is positioned is fixed, resistance that magnetic force and positioning convex produce and movable inner core, touch the counteract gravity forces of closing of head, movable inner core gets off with the touch head is just static, go out hollow frame, just tangible arriving owing to touch head process.

Also increase the first-level buffer driving circuit touching between the output of device and control circuit, effect is to increase drive current and prevent that induced current that coil produces is excessive and damage latch.Can select ULN2003A for use.

Claims

1, a kind of Braille reading device, it is characterized in that, this device comprises control circuit and reads plate, described control circuit comprises controller, latch and the buffering driver of being made up of counter and code translator, controller wherein is by the signal of computer interface reception from computing machine, and gating signal is added on the latch, latch is read plate by buffering driver control; Described reading plate comprises touch device, panel and base plate, touching device becomes the triplex row arrangement to be arranged between panel and the base plate according to the braille design feature, touching device is made up of movable inner core and hollow frame, the upper end of hollow frame and panel relative fixed, movable inner core places in the hollow frame, the upper end of movable inner core is for touching head, hollow frame is stretched out in the lower end, its end is provided with locator protrusions, locator protrusions is positioned on the base plate, the outside of hollow frame is wound with control coil, and the buffering driver of this coil and control circuit joins.