CN2434144Y

CN2434144Y - Electronic blackboard

Info

Publication number: CN2434144Y
Application number: CN 00244158
Authority: CN
Inventors: 邢志周
Original assignee: Individual
Current assignee: Cai Xinyu; Chang Jianwei; Wang Ruixia; Xing Zhizhou
Priority date: 2000-07-25
Filing date: 2000-07-25
Publication date: 2001-06-13
Anticipated expiration: 2010-07-25

Abstract

The utility model discloses an electronic blackboard, which comprises a power supply, a writing pen and a board body. A circuit board is covered on the board body; light emitting diodes which are connected in parallel mutually, and controllable silicon of which can be turned off forcibly, and are in concatenation with the anode are welded on the circuit board uniformly; the end of a writing pipe is connected with the positive electrode of the power supply; a pen head is served as a triggering tip to turn off a control electrode of the controllable silicon 3 forcibly. The light emitting diode is enabled to be conducted and emit light when the pen head comes into contact with the control electrode of the controllable silicon and enables the control pole to be conducted, and characters are enabled to be displayed on the board body. The utility model has the advantages of simple structure, convenient operation and no generation of dust is favorable for physical and mental health of people.

Description

A kind of electronic blackboard

The utility model relates to a kind of blackboard of the usefulness of writing, especially a kind of electronic blackboard.

Blackboard is a kind of teaching aid commonly used, when using chalk on blackboard, to write, chalk does not often splash on one's body and on hand, bring very big inconvenience and influence people's health to the user, this kind blackboard also has a deficiency to be: when light is dark, people are difficult to see clearly the font on the blackboard, and time one length will influence people's eyesight.

The purpose of this utility model provides a kind of non-dusting electronic blackboard.

The technical solution of the utility model is: a kind of electronic blackboard, comprise power supply, writing pen and plate body, on plate body, be covered with a circuit board, on circuit board, evenly be welded with the light emitting diode that can turn-off controllable silicon by force and connect parallel with one another with its anode, can turn-off the silicon controlled negative electrode by force by lead and resistance, SR, adjustable resistance series connection back links to each other with the negative pole of power supply, the positive pole of power supply links to each other with the positive pole of light emitting diode, the end of writing pen links to each other with the positive pole of power supply by lead, and the nib of writing pen is as the trigger end that can turn-off the SCR control utmost point by force.

The nib of above-mentioned writing pen is soft head.

Negative pole at power supply is connected with a blackboard eraser.

The utility model has following advantage:

1, since the not end of writing pen and the anodal connection of power supply in high potential, so when nib touches on the plate body silicon controlled control end, controllable silicon will conducting make the light emitting diode conducting that is in series with it luminous, write on plate body with writing pen like this, this electronic blackboard will show the content of being write on the plate body, so can not produce dust.

2, since electronic blackboard on font be come out by the diode displaying on it and its brightness can regulate by adjustable resistance, so even light secretly also can clearly be seen content written.

3, in order to change written contents at any time.Also be furnished with an electronics blackboard eraser on plate body, an end of this blackboard eraser links to each other with power cathode, electronegative pressure, when blackboard eraser contacts with the silicon controlled control end, give its negative voltage, controllable silicon will end, and so just the font that is made of light emitting diode can be wiped.

Below in conjunction with drawings and Examples the utility model is described in further detail.

Fig. 1 is the utility model structural representation;

Fig. 2 is the utility model circuit controling drawing.

Structure of the present utility model as depicted in figs. 1 and 2, comprise power supply E, writing pen 1 and plate body 3, on plate body 3, be covered with a circuit board, on circuit board, evenly be welded with the controllable silicon that to break by force parallel with one another, can select the DG386SL type for use, each links to each other with the positive pole of power supply E after can turn-offing light emitting diode D of silicon controlled anode A series connection by force, and negative electrode K is by lead and resistance R ₁SR H, adjustable resistance R series connection back links to each other with the negative pole of power supply E, not holding by lead of writing pen 1 links to each other with the positive pole of power supply, the nib of writing pen 1 is as the trigger end that can turn-off SCR control utmost point G by force, the nib of writing pen 1 can select for use soft conductive material to manufacture, and connects a blackboard eraser 2 at the negative pole of power supply E.

The using method of electronic blackboard:

Soft nib with writing pen 1 is write on plate body 3, when the soft nib of conduction touches can turn-off silicon controlled control utmost point G by force the time, make its conducting for its forward voltage, thereby make the light emitting diode D conducting that is in series with it shinny, after a plurality of like this light emitting diode D conducting, on plate body 3, just can demonstrate the particular content of writing, when the word on the plate body 3 is write when full, SR H can be disconnected, font on the whole plate body 3 will disappear, when needing local the change, can turn-off silicon controlled control utmost point G by force, give its negative voltage with blackboard eraser 2 contacts, thereby just can make its shutoff that font is disappeared, very easy to use, the brightness of light emitting diode D can be regulated by adjustable resistance R, and its glow color can be selected green or redness.

Claims

1, a kind of electronic blackboard, comprise power supply (E), writing pen (1) and plate body (3), it is characterized in that, on plate body (3), be covered with a circuit board, on circuit board, evenly be welded with the light emitting diode (D) that can turn-off controllable silicon by force and connect parallel with one another, can turn-off silicon controlled negative electrode (K) by force by lead and resistance (R with its anode (A) ₁), SR (H), adjustable resistance (R) series connection back links to each other with the negative pole of power supply (E), the positive pole of power supply (E) links to each other with the positive pole of light emitting diode (D), the end of writing pen (1) links to each other by the positive pole of lead with power supply (E), and the nib of writing pen (1) is as the trigger end that can turn-off the SCR control utmost point (G) by force.

2, electronic blackboard according to claim 1 is characterized in that, the nib of above-mentioned writing pen (1) is soft head.

3, electronic blackboard according to claim 1 is characterized in that, is connected with a blackboard eraser (2) at the negative pole of power supply (E).