CN1048821A - A kind ofly write, the fully automatic blackboard of drawing, sound picture unification - Google Patents

Abstract

A kind ofly write, the fully automatic blackboard of drawing, sound picture unification, have multinomial functional device, it record, puts, public address set can on-the-spot faithful record teacher classroom speech and public address are exported the recording-reproducing signal; The spring type screen can make projection and literal explanation carry out side by side; The sound picture synchronous circuit guarantees that slide projector works asynchronously with playback system; The slide rail type drawing rule helps teacher's mapping; The soft closed that is printed on multiple coordinate commonly used is write band, Display Light Box, automatic erasing device, power output socket chamber, the more convenient teachers ' teaching of teaching aid safe deposit box.The characteristics of this blackboard be dustless, health, function strong, make things convenient for teachers ' teaching, improve the teaching job environment.

Description

A kind ofly write, the fully automatic blackboard of drawing, sound picture unification

The present invention relates to a kind of improvement of automatic blackboard, specially refer to a kind of invention of multi-functional automatic blackboard.

All backwardnesss of traditional blackboard are conspicuous, fall behind for breaking away from these, Chinese patent has promptly reflected such brass tacks from the application of 1985.8～1989.3 numerous relevant blackboards, blackboard has the trend from the rigid plate formula towards flexible widely different rotatable development, Chinese patent CN85100030A is the example of this respect, it discloses a kind of by the master, the round that driven voller drove is write band for writing usefulness, wiping mark uses the wiping roller to finish, have dustless, enlarge writing on the blackboard face and be convenient to advantage such as student viewing, the deficiency of this structure is, writing surface is vertical configuration, the winding direction also longitudinally, in general, owing to write the constraint that band fabric width specification can be subjected to some natural conditions, to conveniently look simultaneously and see, so the blackboard panel size is subjected to a certain degree limiting, particularly its wiping roller is shaped like narrow and contacts with writing between the band, has only a kind of relative motion of direction, wipe effect and depend on the relative linear velocity difference of writing band and wiping roller, therefore the rub effect owes desirable, to have introduced another kind of essence be the mode that wipes that is used for widely different commentaries on classics blackboard to Chinese patent CN2030149U in addition, is close to the erasing device that soft a row or multi-row blackboard brushing of writing the lining surface constitutes after being loaded on plate.Because this row brush formula blackboard eraser and write and also only have a kind of relative motion form between the lining, so wipe effect depend primarily on the pressure that imposes on the row brush can not be too small, but pressure is excessive, can influence the motion and the life-span of writing lining, and, the employing aforesaid way can wipe face clutch situation with quilt if considering wiping roller or row brush simultaneously, then be difficult to do blackboard thinlyyer, influence overall appearance.

Aforementioned CN2030149U patent also discloses a form that essence is tape guide roller and idler roller unification, this form has been abandoned the form of traditional ad hoc idler roller tensioning, can avoid ad hoc idler roller to cause secondary pollution or destruction to need to keep the writing problem to writing surface because of catching to write with going up the mark foam, its advance is arranged, but he regulates what adopt to the tensioning of tape guide roller is the rigidity regulative mode of owing desirable " in the bearing holder (housing, cover) that links to each other with the adjustment screw operating range for adjusting driven axle (essence be tape guide roller hold concurrently idler roller) is housed ", the defective of this mode is that tensioning is regulated and can not be finished automatically, adjust difficulty, be difficult to guarantee that driven axle and driving shaft have the higher depth of parallelism, thereby can not effectively prevent to write the generation of band longitudinal leap.

The structural member of directly not illustrating the effect purpose in the CN2030149U patent disclosure has been arranged again supporting paper, promptly be installed in pulley that can on guide rail, move or the pulley folder write with upper and lower edge, the effect deducibility of this structural member is to be used for anti-vertical arc phenomenon of writing lining, but this structural member seems complicated and clumsy.

The duplicating blackboard that CANON releases has also reflected the so a kind of pursuit of people to blackboard, the requirement that promptly blackboard is had some extension functions, above-mentioned open invention does not reflect the requirement of this respect, and the duplicating blackboard of CANON also only terminates in duplicating, wall chart function.

The objective of the invention is to provide a kind of comparatively ideal automatic blackboard that wipes with tensioning apparatus and others performance that has.Another object of the present invention be to provide on the aforementioned automatic blackboard basis that more satisfactory performance arranged that a kind of collection is write, the golden automatic blackboard with multinomial comprehensive function of drawing, acoustic image unification.

The present invention realizes by following approach.

The erasing device of blackboard is to make roll-type or row brush formula blackboard eraser into sheet type to wipe sheet, the particularly this sheet that wipes is by a cover leverage, a composite braces and a cover swing-bar mechanism can obtain power from live roll, certainly, also can be from other approach, obtain power by other mechanism or dress, consequently can realize by wiping face rub motion on level and the vertical both direction being arranged simultaneously with respect to writing band, like this, even wiping sheet acts on by the pressure on the wiping face lower, still can reach the higher rate of cleaning, wiping sheet in addition can in time leave or engage with quilt wiping face as required, finishing rub selects with staying two kinds of functions of mark, and owing to adopt said structure, thereby institute takes up space for a short time, can do blackboard thinlyyer.

Writing aspect the band tensioning, the tape guide roller two end axles is contained in respectively in the tape guide roller bearing, and two bearings are contained in respectively and respectively are subjected to one group of pull bar effect, in the chute that can offer along the frame end limit in two slide blocks of translation.Its pull bar group is subjected to one again and can be adjusted spring force and only need regulate the rocker arm system that the spring tractive of a screw and act on, make tape guide roller when making the translation strained movements, can obtain the higher depth of parallelism that parallels with live roll, can satisfy when tensioning is write band and changeed width of cloth conduction band, to make and write the generation that band does not have axial float, the conduction band effect and the tension of writing with widely different commentaries on classics are combined with comparatively ideal mode, and tensioning is carried out automatically, and whole tension force can be adjusted easily and flexibly.Thereby can overcome the shortcoming of the relevant tensioning apparatus aspect in the aforementioned publication.

Write and be subjected to the lettering pen effect when having, because of a volume long arc phenomenon of hanging down that can produce inevitably, for preventing or alleviating this phenomenon, a kind ofly have a plurality of soft bands of withholding of thin matter that can in the guide rail on being fixed in the upper and lower frame plate of blackboard, slide that distribute by certain distance on it writing to fix in some way with upper and lower edge, the anti-like this arc effect of hanging down is strong, and textural anomaly is simple.

Write the flexible needs of the volume width of cloth to writing band when satisfying teachers' instruction, preferably can guarantee to write the function that band can accurately be located in the rapid stop of the widely different Cheng Zhongyou of turning over.Be provided with brake apparatus for this reason, be installed on live roll one side.Brake apparatus is by brake block and the lever system that is attached thereto and electromagnet, reed and reed are fixed and the adjustment seat constitutes, and can implement fast braking to the braked wheel that live roll is connected with it mutually, by the release of electromagnet enforcement to braking.

In addition, blackboard also is provided with dust exhaust apparatus, is made up of dust sucting motor hose and dust bag.Be installed on a side that coexists with erasing device.

The erasing device of above-mentioned introduction, tensioning apparatus, the necessary blackboard of forming as framework, backing plate of the anti-arc device that hangs down, brake apparatus, dust exhaust apparatus and other then constitutes comparatively desirable widely different transition of the automatic blackboard of a kind of performance, and it is to enlarge and the basis of development blackboard outside imperial palace function.On this basic blackboard, increase some functional device or circuit, make it can obtain the convenience of writing on the blackboard; The easy victory of drawing, and teaching acoustic image and others help the function of imparting knowledge to students.Can enrich the practicality of blackboard, satisfy people's pursuit.

This inventive concept is realized by following manner.

The band of writing of the widely different commentaries on classics automatic blackboard in above-mentioned basis is made of the opaque material of soft dark color, also can constitute by transparent or semitransparent soft material, optimal material is through certain solid color of coated material of shallow plain color particularly on translucent soft material or the transparent soft material, utilize this material, the utilization silk screen process is printed multiple conveniently write and the impart knowledge to students required various forms coordinate or the common combinations coordinate pattern of drawing and theoretical curve analysis on positive or positive and negative two sides.As the logical width of cloth formula grid coordinates of front seal, reverse side seal framing type is the similar shape coordinate not, while appropriate location, space in widely different transition of the automatic blackboard framework of above-mentioned basis, one its lamp is set can be subjected to light on and off lamp box that handle and that have reflective chamber for showing the coordinate of writing the band back side, obviously, the trace of reverse side coordinate should be solid.Maintenance for convenience and replacing light fixture can be designed to the fluorescent tube fixing body of lamp box both sides guide rail plug-in type lamppost.More fluorescent tube connects the convenience of electricity, and each fluorescent tube connects electricity and realizes by the electrical prongs that connects that correspondence position is installed on electricity cover pin and the frame plate that connects of this lamppost in top setting altogether fully.

Draw for convenience, can on widely different transition of the automatic blackboard framework roof and floor of above-mentioned basis, be provided with the anti-arc band that hangs down and withhold slide rail zoarium and two parallel slide rails, install therein and a kind ofly can ice the slide rail type drawing rule that smoothly moves along slide rail.By the slide rail type drawing rule and on device can on blackboard, make parallel lines flexibly easily, arbitrarily angled line, particularly parallel lines at any angle.In addition, by one can only be adaptive with the slide rail type drawing rule multiple tracks parallel lines renderer, once can finish the drafting of multiple tracks parallel lines such as staff line.The Taoism of parallel lines can be adjusted by pen clip quantity, and the spacing of parallel lines also can be regulated within the specific limits continuously, and the direction of parallel lines can be a level or vertical.On the slide rail type drawing rule, if can also dispose certain mode can be subjected to accurately control, with handle the chi body from line slip and slide block on the chi body from type of drive machinery or electricity of line slip, also can controlledly draw the number reason curve map of various ways.

In classroom instruction, often relate to and will use some projection mechanisms to carry out aided education, yet being the screen that must join, common form separates with blackboard, and this mode is to teacher's limit projection, and the limit explanation has inconvenience and poor visual effect.For making things convenient for the projection teaching of projection mechanisms such as slide projector, particularly making things convenient for projection limit, limit to separate the projection sound accompaniment of mediating a settlement carries out synchronously, can be in the peripheral space appropriate position of above-mentioned basic blackboard, get generally that a certain side in blackboard upper edge installs the spring type screen additional and the sound picture synchronous circuit can be realized this function.

In the periphery of above-mentioned basic blackboard also can be that a certain appropriate position, space installs electronics and control circuit additional in the framework, PA-system, making blackboard have wireless microphone receives, plate is hidden microphone, two-channel cable microphone and circuit input, two-channel recording playback sound, the output of recording-reproducing signal, single playback, sound picture is synchronous, amplify, sound equipment, the function of circuit output and multiple voltage output relies on the projection that is fixed on appropriate location on the anti-arc band that hangs down and is fixed on the framework switch element of a certain position and matches and also can realize the power supply indication, write band and change width of cloth servo-actuated control, the full width of cloth changes face and stays mark control, and the full width of cloth changes the control of face rub, writes band coordinate pattern and selects face automatically, the light on and off of lamp box lamppost are selected, the automatic control function of blackboards such as dust suction control action.Become write, the fully automatic blackboard of drawing, sound picture unification.

It is worthy of note, in the future of technical development, above-mentioned widely different transition automatic blackboard the extension function can also be with flat-surface television (or claiming flat panel TV) and can with matchingly select and copy down, playback apparatus combines suitable place, locus and above-mentioned blackboard.

Or a kind of flat surface sensor and combining of above-mentioned blackboard are installed in place, suitable locus and pick up and export, output signal electricity or magnetic of the supported utilization of the literal on the blackboard, pattern recording content.

Several blackboard extension expanded functions of above-mentioned introduction have the precondition of aforementioned basic blackboard, and obviously above-mentioned various extension expanded functions also can be installed on the blackboard of other form according to concrete needs; Also can be the installing additional of partial function of above-mentioned extension expanded function; Some needs the also aforementioned basic blackboard of blackboard of simple type not attach the blackboard of above-mentioned extension expanded function.

Described embodiment explains details of the present invention below in conjunction with accompanying drawing.

Accompanying drawing 1 is the upright planar view of widely different automatic blackboard transition

The upper and lower base plate of framework (18) (1), backing plate (5) and the some sheths that do not draw have in the drawings constituted general frame.On this framework, drive roll (34) has been installed, tape guide roller (7) and tensioning apparatus, erasing device, brake apparatus and dust exhaust apparatus.Writing band (2) is and has the utmost point or electrodeless astragal shape structure to be sleeved on live roll (34) tape guide roller (7) and the backing plate (5).Write band (2) and change width of cloth water intaking square to rub being arranged or staying two kinds of widely different band modes that turn over of mark; its rub is crossed and is with the direction of redressing of fetching water; stay mark to cross band and get its contrary direction; also rub is crossed band and is stayed mark to cross band to get and belong to unidirectional level in the other direction; even for adapting to certain custom needs, also horizontal positive direction.Write the upper and lower edge of band (2) and be equiped with the anti-arc band (21) (3) that hangs down.The anti-arc band (21) (3) that hangs down have on it by certain distance distribute can be in guide rail (19) (4) the withholding of slippage (33), belong to a kind of sheet type flexible belt, as making with plastics or sheet metal; Can prevent to write band the arc phenomenon of hanging down takes place when writing, also can play anti-effect of writing the band longitudinal leap in case of necessity.For realizing that writing band (2) in the aforementioned introduction changes the needs that multiple difference in functionality mode is controlled automatically in the width of cloth process, also be provided with the effect of matching at anti-some position of arc band (21) (3) of hanging down and write band (2) and make projection (51) with width of cloth rotation with some switch block in the control circuit, these switch blocks are fixed on appropriate position on the framework, do not provide in the drawings.

The structure of tensioning apparatus and principle are: conduction band holds concurrently that the axle head (6) of idler roller (7) is installed in can be along in the bearing that is provided with in the slide block (8) of horizontal sliding in the chute of chassis base (1) (18) end, slide block (8) is subjected to the effect of one group of pull bar (9) (13) (16), and pull bar group (9) (13) (16) is subjected to being connected in the effect of the rocking arm (14) on the rocker arm shaft (15), one end of spring (12) links on rocking arm (14), the other end be screwedly mounted on the adjustment screw of adjusting on the seat (10) (11) and link mutually, (17) be draw-bar seat, spring (13) affects rocking arm (14), draw skewer dimension (9) (13) (16) by rocking arm (14) drive, can control the slippage of slide block (9), and this effect is passed to pull bar group with the lower frame frame plate tensioning apparatus correspondence position of the basic symmetry of superstructure by rocker arm shaft (15), the equivalent slippage of control other end slide block and upper end slide block (9), guarantee that tape guide roller (7) writes in the process of band (2) all the time and the live roll keeping parallelism doing the horizontal sliding tensioning, write the primary factor that band (2) produces longitudinal leap thereby eliminate, finish the conduction band effect of auto-tensioning of holding concurrently, and easy to adjust.

Wipe sheet (22) (27), vertical rod (26), rocking arm (23) (48), priming lever spring (25), electromagnet (29), lever (28), composite braces (30), swing-bar mechanism (31), bevel gear (32) formation erasing device.Wherein by rocking arm (23) (48), rocker arm shaft (49) vertical rod (26), block (24), spring (25), electromagnet (29) realize to wipe sheet (22) (27) with the joint of writing band (2), separate control, when electromagnet (29) is switched on, wipe sheet (22) (27) and get " closing " state, otherwise get " from " state.Vertical rod (26), lever (28), composite braces (30), swing-bar mechanism (31), bevel gear (32) constitutes the Poewr transmission mechanism that wipes sheet (22) (27), when drive roll (34) rotates, can pass to the Poewr transmission mechanism that wipes sheet (22) (27) by this mechanism, when drive roll (34) rotates, can pass to the power that sheet (22) (27) does to cross perpendicular to blackboard the reciprocal alternating movement of band direction that wipes by this mechanism, make that wiping sheet (22) (27) can have vertical and horizontal to wipe motion relatively for two kinds with respect to the face that wipes of writing band (2), so wipe satisfactory for result.In addition, consider the minimizing energy consumption, when wipe sheet (22) (27) be " from " during state, preferably Poewr transmission mechanism this moment can be passed to the reciprocal alternating movement power cut that wipes sheet (22) (27), to reduce the power consumption of motor (35), reach the saving purpose.The method that realizes this purpose be with bevel gear (32) change into live roll (34) go up a energy that spindle nose interrelates according to live roll (34) turn to different, select to transmit or cut off the umbrella shape external gear freewheel clutch that tube swing-bar mechanism (31) transmits power automatically.

By electromagnet (37), armature (38), adjustment screw (39), reed (41), reed and elastic force are adjusted seat (40), brake(-holder) block lever seat (42), and brake lever (43), brake block (44), braked wheel (45) have been formed the brake apparatus system.Under electromagnet (37) dead electricity situation, spring leaf (41) roof pressure brake lever (43) is realized braking with the operation brake block pair live roll that links to each other with braked wheel, makes and writes the accurate location of band (2) realization to help to select the width of cloth.

Motor (35) is the main motor of blackboard, with certain kind of drive rotation function is passed to live roll, and its kind of drive can be any in the modes such as gear, chain, belt, friction, the special recommendation V belt kind of drive of the present invention.

Dust sucting motor (36) is formed dust exhaust apparatus with the hose of not drawing in the drawings, dust bag, and controlled circuit function moves when erasing device is wiped mark.Hose is according to the real space conditional decision installation site in the framework.

Accompanying drawing 2, for write, the blackboard outside drawing of drawing, sound picture unification

Every content of being drawn among the figure has been done abundant demonstration to the function of the expansion of extension on aforementioned widely different commentaries on classics automatic blackboard basis that the present invention established.Every content is among the figure:

(1) control knob panel

(2) write band

(3) lower frame

(4) slide rail type drawing rule

(5) the slide rail type drawing rule is hidden the chi chamber

(6) a kind of wildcard formula door lock

(7), (8) electronic circuit comprises record, puts, singly puts, sound picture is synchronous, amplifies, recording-reproducing is defeated

Go out, wireless microphone receives, plate is hidden microphone, wired suitable tube or line input circuit

Reach record, put the device operating room.

(9), (15) left and right sides audio amplifier

(10) tensioning apparatus adjustment lid

(11) upper side frame

(12) spring type screen

(13) ring is hanged up in screen

(14) wipe system and adjust access cover

(16) stock class teaching aid closes

(17), (18) general category teaching aid closes

(19) machinery check and repair and power supply control, multiple voltage accessory power outlet chamber

(20) lamppost

(21) the reflective chamber of lamp box

(22) screen hook

Above-mentioned every content, the position in (Fig. 1) they are not well-determined, can be according to circumstances flexible, and on form and content, allow to cut out as required to add.

Accompanying drawing 3 is write band and the anti-arc band horizontal frontal plane figure of hanging down

(1) writes the positive and logical width of cloth formula grid coordinates pattern of band

(2) the anti-down arc band that hangs down

(3) go up the anti-arc band that hangs down

(4) connect rivet hole

(5) withhold

(6) projection

Accompanying drawing 4 is write band and the anti-arc band antiplane figure of hanging down

Each content of itemizing is consulted last figure and is understood.

The above-mentioned carrying material of writing can be to be made of plastics or sheet metal.

Accompanying drawing 5 wipes sheet and wipes face and lay material decorative pattern form figure

The face that wipes that wipes sheet is covered with soft material without exception, and optimal material is the ripe leather of soft corium, and it lays decorative pattern can various ways, the form of recommending is that decorative pattern is interruption is arranged " people " word shape, and a=β can select arbitrarily in 0 °～90 ° scopes, and optimum value is 45 °.

Accompanying drawing 6, slide rail type drawing rule plane

The slide rail type drawing rule is by main scale (1), pay chi (9), slide block (4), slide rail (12), angular readings dish (8), pulley and pulley yoke (6), (10), multiple tracks parallel lines plotter sleeve (2), locking position button (3) (7), sliding rail fixing piece (5) (11) constitutes, and pays chi (9) and can rotate in 0 ° of-180 ° of scope around slide block (4) front end one axis hole axis; Slide block (4) can slide and can also rotate in 0 ° of-270 ° of scope around slide rail along slide rail.The terminal that has on the slide rail must link mutually with hiding the chi chamber, makes the slide rail type drawing rule obtain guard space when not using.

Accompanying drawing 7, multiple tracks parallel lines renderer plane

(1) inserted link

(2) panels

(3) locking position button

(4) pen clip plate

(5) pen clip jack

(6) position self-locking device

(7) axle

Pen clip plate (4) can rotate in 0 ° of-180 ° of scope around axle (7), and the position is by position local device (3), (4) locking.

Accompanying drawing 8, pen clip founds plane

Utilization multiple tracks parallel lines renderer is in conjunction with the action and the position local device of slide rail type drawing rule, can draw by 0 to the pen clip plate the level or the vertical parallel lines of spacing arbitrarily in any two centre distance scopes.Its adjusting should make things convenient for.

Accompanying drawing 9, lamp box horizontal frontal plane figure

(1) chassis base

(2) backing plate

(3) connect electrical prongs

Accompanying drawing 10, lamp box A-A profile

(1) chassis base

(2) clear glass

(3) reflective chamber parting bead

(4), (6) lamppost gib block

(5) reflective chamber substrate

Accompanying drawing 11, the lamppost plane

(1) lamppost gathering sill

(2) connect electricity cover pin

(3) lamp tube socket

Topped clear glass at the lamp box outer surface both as the light inlet window of lamp box, and in its present position, is obtained the effect of backing plate (Fig. 1) (5).

The lamp box operated by rotary motion is on the right side of blackboard.

Accompanying drawing 12 is write, the circuit general diagram of drawing, sound picture unification blackboard

So far, a by the agency of and invention has been described, promptly have comparatively ideal wiping, a kind of widely different transition of the automatic blackboard and the blackboard that grows up on this basis of tensioning and other performance---the fully automatic blackboard of a kind ofly write, drawing, sound picture being unified with numerous extension expanded functions, as an educational aid, it has the serviceability of obvious excellence in normal blackboard, can satisfy the needs of the many aspects of teachers ' classroom teaching, can receive dustless, health, improve the teaching job environment, help to improve the effect of teaching timeliness and quality.Be widely used in all kinds of schools, especially occasion such as lecture theater, speech Conference Hall.

Claims (10)

1. one kind by on (Fig. 1), lower frame frame plate (1) (18) backing plate (5) is write the anti-arc band (3 that hangs down of band (2) live roll (34) tape guide roller (7) erasing device (22～32.48～50) tensioning apparatus (8～17), 21.33) widely different transition of the automatic blackboard formed of braking and the main motor of releasing device (37～46) (36) dust exhaust apparatus (35), it is characterized in that: a, be sleeved on flexibility on live roll (34) tape guide roller (7) utmost point is arranged or do not have electrode structure write band (2) water intaking square to rub or stay two kinds of widely different band modes that turn over of mark, its rub is crossed and is with the direction of redressing of fetching water, stay mark to cross band and get its contrary direction, also rub with stay mark to cross band to get and belong to unidirectional level in the other direction; B, to write band (2) be soft material, and solid color is best to be the flexible film material of shallow plain color in particular for having through coated on translucent or transparent its; C, write the positive or positive and negative two sides of band (2) and be printed on the coordinate diagram case; D, write the upper and lower edge of band (2) and be equiped with the anti-arc band (21.3) that hangs down, the anti-arc band (21.3) that hangs down be a kind of have on it by certain distance distribute can slippage in guide rail (19.4) a kind of sheet type flexible belt of withholding (33); E, anti-hang down arc band (3) or (21) are gone up certain appropriate position and more than one matching with some switch block in the control circuit is housed realized writing the projection (51) that the roll coil of strip width of cloth is controlled automatically; F, the automatic volume width of cloth control of writing band (2) have with the width of cloth (promptly arbitrarily big small breadth) change face, the full width of cloth stays mark to change face, full width of cloth rub changes face, write band (2) upward the coordinate commonly used of printing select the face mode automatically.

2. widely different transition according to claim 1 automatic blackboard, it is characterized in that, be equiped with the slide rail type drawing rule (4) that (Fig. 2) and blackboard integrally combine in the peripheral suitably space region of widely different transition of automatic blackboard and locus, hide chi chamber (5), spring type screen (12), coordinate Display Light Box (21), lamppost (20), teaching aid keeping box (16,17,18) are adjusted maintenance unit (10,14).Suitably the locus installs that promising realization wireless microphone receives, plate is hidden microphone in widely different transition automatic blackboard periphery or framework, cable microphone and circuit input, recording playback sound, single playback, the output of recording-reproducing signal, sound picture is synchronous, amplify, the output of sound equipment, circuit, multiple voltage output, help to realize writing with various commentaries on classics width of cloth forms and dust exhaust apparatus control automatically that having of function surmounts that blackboard is write substantially and rub function or simple power control circuit beyond the device and the circuit that belong to blackboard extension function, constitute write, the fully automatic blackboard of drawing, sound picture unification.

3. according to the described widely different rotatable automatic blackboard of claim 1, it is characterized in that erasing device wipes sheet (22) (27), rocking arm (23) (28), rocker arm shaft (49), fixed screw (50), block (24), spring (25), vertical rod (26), leverage (28), electromagnet (29), composite braces (30), swing-bar mechanism (31), bevel gear (32) by (Fig. 1) and forms, a wipes the vertical blackboard of sheet (22) (27) to be changeed the band direction and does reciprocal alternating movement, by wiping face relative motion on vertical, the horizontal both direction is arranged with blackboard when wiping mark; B, wipe sheet (22) (27) and establish shape in pairs, reciprocating power is taken from live roll (34) by leverage (28), composite braces (30) and swing-bar mechanism (31), bevel gear (32); C, bevel gear (32) can be the freewheel clutch that is connected mutually of a kind of and an end axle of live roll (34) and the conjunction of bevel gear, constitute the energy-saving structure of umbrella shape external gear freewheel clutch; D, wipe sheet (22) (27) and handled by a rocker arm system and electromagnet (29) device and can realize and write contacting and separating of band (2); E, the face that wipes that wipes sheet are covered with soft material, apply " people " word shape decorative pattern that becomes to have interruption, and pattern angle a=, can select 0 °～90 ° scopes, and optimum value is 45 °.

4. widely different transition according to claim 1 automatic blackboard, it is characterized in that tensioning apparatus is by (Fig. 1) slide block (8) pull bar (9,13,16) draw-bar seat (17) spring (13) spring and spring are adjusted seat (10) and are adjusted screw (11) rocking arm (14) rocker arm shaft (15) composition, conduction band roller end axle be installed in the slide block (8) that can move horizontally along the chute that chassis base (18) end is offered the axle in, slide block (8) tension member (9,13,16) and the effect of rocking arm (14) spring (12) and this effect is reached in the tensioning apparatus with the lower frame frame plate end correspondence position of the basic symmetry of superstructure by rocker arm shaft (15), make tape guide roller (7) can do to point to the outer horizontal translation motion of frame plate end, conduction band and tensioning is unified, and the more satisfactory tensioning mode that the tensioning of writing band (2) can be finished automatically.

5. widely different transition according to claim 1 automatic blackboard, it is characterized in that brake apparatus adjusts screw (39) springs seat (40), springs (41), connecting rod base (42), connecting rod (43), brake block (44), braked wheel (46) by (Fig. 1) Breake Electromagnet (37), armature (38) and forms, the braking that braked wheel (46) is implemented is by brake block (44) and be attached thereto the supporting effect realization of the connecting rod (43), the springs (41) that are; When electromagnet (37) when being in off-position, braked wheel (46) is in the state of being braked.

6. slide rail type drawing rule according to claim 2, it is characterized in that the slide rail type drawing rule is by (Fig. 6) main scale (1), pay chi (9) slide block (4) slide rail (12), angular readings dish (8) pulley is paid (10), pulley (6), device for fixing slide rail (5) (11), position local device (3) (7) is formed, and pays chi (9) and can rotate in 0 °～180 ° scopes with the end axle that slide block (4) links mutually on the edge, and its corner can directly be indicated by the angular readings dish; Slide block can slide along the slide rail direction and also can rotate in 0 °～270 ° scopes around slide rail; By (Fig. 7) inserted link (1) panels (2) position local device (3) (6), the pen clip plate (4) with having pen clip (Fig. 8) patchhole (5) that can rotate in 0 °～180 ° scopes around axle (7) constitutes the multiple tracks parallel lines renderer (Fig. 7) that can be connected mutually by certain way and slide block (4), draw (Fig. 7) in conjunction with the action of slide rail or drawing rule and the locking of position local device by the multiple tracks parallel lines, can draw out the level or the vertical parallel lines that go up any spacing in any two centre distance scopes by 0 one pen clip plates (4).

7. lamp box according to claim 2, it is characterized in that part (1), clear glass (2), the gib block (4) (6) of lamp box by (Figure 10) frame plate, backboard (5), center, reflective chamber parting bead (3) is formed, a lamppost (Figure 11) is gone up the installing fluorescent tube, and the b lamppost adopts the gib block plug-in type; Fluorescent tube on the c lamppost (Figure 11) connect electric mode adopt the lamppost top connect on electricity cover pin (Figure 11, (2)) and the frame plate on the relevant position connect electrical prongs (Fig. 9, (3)) mutually fit finish.

8. device and the circuit that belongs to blackboard extension function according to claim 2 is characterized in that the device of a, blackboard extension function and circuit are write by being installed in whole or in part, beyond the fully automatic blackboard of drawing, sound picture unification on other form blackboard.The device of b, blackboard extension function and circuit part or all be not installed on widely different transition of the automatic blackboard.

9. according to claim 2ly write, the fully automatic blackboard of drawing, sound picture unification, it is characterized in that write, on the fully automatic blackboard of drawing, sound picture unification suitably the place, locus be combined with the flat tv device of aided education and can with matchingly shoot with video-corder, put and resemble device.

10. according to claim 2ly write, the fully automatic blackboard of drawing, sound picture unification, it is characterized in that write, suitable locus on the golden automatic blackboard of drawing, sound picture unification, can be provided with a kind of being used to picks up and exports, flat surface sensor and the auxiliary equipment and the circuit of the character pattern record content on the blackboard.

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