CN102275426A

CN102275426A - Blackboard structure

Info

Publication number: CN102275426A
Application number: CN2011102240561A
Authority: CN
Inventors: 陈永华
Original assignee: ANJI TIANHUANGPING HIGH SCHOOL
Current assignee: ANJI TIANHUANGPING HIGH SCHOOL
Priority date: 2011-08-05
Filing date: 2011-08-05
Publication date: 2011-12-14

Abstract

The invention relates to a teaching instrument, in particular to a blackboard structure. The blackboard structure is realized through the following technical scheme: the blackboard structure comprises a base plate provided with a front surface and a back surface, rotating shafts respectively arranged at the left side and the right side of the base plate, a curtain arranged around the rotating shafts and tensioned with the two rotating shafts, and a motor used for driving one rotating shaft to rotate. According to the blackboard structure, the writing area of a blackboard can be effectively increased.

Description

A kind of blackboard structure

Technical field

The present invention relates to teaching appliance, particularly a kind of blackboard structure.

Background technology

Blackboard of the prior art, it as China Patent No. the disclosed a kind of blackboard of patent of 201020656598.7 utility model, comprise blackboard surface and wiping board, blackboard surface is horizontally arranged with directive slide track respectively in two ends up and down, be that blackboard surface the place ahead vertically is provided with column between the directive slide track, two ends are separately positioned in the directive slide track and with it and are slidingly connected about the column; Described wiping board is provided with through hole, and the wiping board lower surface is provided with the sponge wiper, and wiping board middle part upper surface is provided with guide holder and is hinged with its lower end, and column passes the guide holder middle part and is slidingly connected with it; The blackboard of this kind structure makes when erasing the board more laborsaving, but the dust that produces when erasing the board easily fills the air in air human body, and the healthy of the people who particularly erases the board impacts.

And for example China Patent No. is 201020642321.9 the disclosed a kind of blackboard of utility model patent, comprise mainboard and subplate, be respectively arranged with the groove guide rail in two ends up and down at mainboard, be provided with support bar between the groove guide rail, the two ends of support bar are separately installed with pulley, and described pulley is slidingly connected in the groove guide rail; Subplate passes support bar and is slidingly connected with it, and subplate left and right sides terminal device is provided with projection and matches with the groove that is provided with on the support bar; The area of described subplate is less than the area of mainboard, is installed with the rectangle box body in a side of mainboard, is placed with indicating arm in the described box body; The blackboard of this kind structure has increased write area, but also strengthens when increasing write area the occupying of space, and produces dust still easily fill the air in gas when erasing the board, and is easy to human body, and the healthy of the people who particularly erases the board impacts.

Summary of the invention

The purpose of this invention is to provide a kind of blackboard structure that can effectively increase the blackboard write area.

Above-mentioned technical purpose of the present invention is achieved by the following technical programs: a kind of blackboard structure, comprise backing plate with front and rear surfaces, respectively be located at the backing plate left and right sides rotating shaft, keep the heavy curtain of tensionings and be used to drive the motor that one of them rotating shaft is rotated around rotating shaft and with two rotating shafts.

When writing, word can be write on the heavy curtain; The setting of backing plate is for the ease of writing; When the heavy curtain of backing plate front surface is write when full, can rotate by the driven by motor rotating shaft, go to backing plate front surface place so that be positioned at the heavy curtain at place, backing plate rear surface, so that write; Thereby the present invention has effectively increased the write area of blackboard.

As of the present invention preferred, be 0.5mm to 3mm over against the heavy curtain of backing plate front surface and the ultimate range of backing plate.

This distance be meant when not writing, when promptly the heavy curtain at backing plate front surface place is in formation state, the distance between heavy curtain inner surface and the backing plate; This apart from the effect that is provided with is: 1, if this distance is excessive, then when writing, easily influence the rate of tension of heavy curtain; Too small then because the frictional force between heavy curtain and the backing plate then can increase the load that motor rotates; 2, if distance if excessive, then when writing, easily inwardly recessed amplitude is big more, feels hard, uncomfortable when making the person writing; Therefore, through inventor's repeatedly practice, preferably this distance is 0.5mm to 3mm.

As of the present invention preferred, this kind blackboard structure comprises also and is positioned at that backing plate rear surface side vertically is provided with and the static brush bar of backing plate relatively that described brush bar and heavy curtain are inconsistent and make heavy curtain close to the backing plate rear surface.

The setting of brush bar, when making heavy curtain in rotation and through the brush bar, the word on the heavy curtain is just wiped by the brush bar automatically; The brush bar makes to brush between bar and the heavy curtain to have certain rate of tension, so that with the heavy curtain wiped clean with heavy curtain is inconsistent and make heavy curtain to the close setting in backing plate rear surface.

As of the present invention preferred, the angle that is positioned at the heavy curtain formation of backing plate rear surface side is 170 ° to 175 °.

If this angle then easily makes the frictional force between brush bar and the heavy curtain excessive excessive, is unfavorable for the smooth rotation of heavy curtain, and therefore, preferably this angle is 170 ° to 175 °.

As of the present invention preferred, described brush bar is positioned at the backing plate middle part.

Dust can directly drop from brush bar below; And the brush bar is vertically to be provided with, therefore, the position that dust drops substantially only is confined to brush the bar position, even and have the part dust to scatter to brush bar both sides, can not exceed the area that heavy curtain covers yet, the dust that produces when the wiping heavy curtain can not impacted health because of filling the air in air, therefore, be positioned at the backing plate medium position as preferred brush bar.

As of the present invention preferred, described brush bar below is provided with the powder groove.

The width of powder groove is slightly larger than the width of brush bar, thereby the dust that produces when making wiping substantially all falls within the powder groove, and easy cleaning is further protected health.

As of the present invention preferred, the length of described brush bar is equal to or greater than the width of heavy curtain.

As of the present invention preferred, be arranged with rubber sleeve in the described rotating shaft.

Be to rotate in order to drive heavy curtain better.

As of the present invention preferred, the inner surface of described heavy curtain is covered with the rubber skin.

Further increase frictional force between heavy curtain and the rotating shaft, be beneficial to heavy curtain and rotate; , then further specify simultaneously because the heavy curtain inner surface is provided with the rubber skin, can not be too small over against the ultimate range of the heavy curtain of backing plate front surface and backing plate.

In sum, the present invention has following beneficial effect:

1, increases write area, improved quality of instruction;

2, avoid dust to fill the air in air, health is damaged;

3, wipe writing automatically, saved manpower, also make the class period more abundant.

Description of drawings

Fig. 1 is embodiment 1 axonometric drawing;

Fig. 2 is embodiment 1 side view.

Among the figure, 1, backing plate, 2, rotating shaft, 3, heavy curtain, 4, the brush bar, 5, the powder groove, 6, fixed mount, 7, wall.

The specific embodiment

Below in conjunction with accompanying drawing the present invention is described in further detail.

This specific embodiment only is an explanation of the invention; it is not a limitation of the present invention; those skilled in the art can make the modification that does not have creative contribution to present embodiment as required after reading this specification, but as long as all are subjected to the protection of Patent Law in claim scope of the present invention.

Embodiment 1: shown in Fig. 1 to 2, a kind of blackboard structure, comprise by fixed mount 6 and be fixed in the backing plate with front and rear surfaces 1 on the wall 7, backing plate 1 left and right sides be provided with rotating shaft 2, the rotating shaft 2 in left side is connected with motor, backing plate 1 and two rotating shaft 2 peripheries are provided with heavy curtain 3, and heavy curtain 3 and two rotating shafts 2 all keep certain rate of tension.

For increasing the frictional force between rotating shaft 2 and the heavy curtain 3, fixed cover is provided with rubber sleeve in the rotating shaft 2, and the inner surface of heavy curtain 3 is covered with the rubber skin; Rubber sleeve and rubber skin are not shown in the drawings.

Over against the heavy curtain 3 of backing plate 1 front surface and the ultimate range of backing plate 1 is 0.5mm.

This kind blackboard structure also comprises the brush bar 4 that is fixed on the wall 7 and vertically is provided with, and brush bar 4 and heavy curtain 3 are inconsistent and make heavy curtain 3 close to backing plate 1 rear surface, thereby the angle that the heavy curtain 3 that is positioned at backing plate 1 rear surface side is formed is 170 °.

Brush bar 4 is positioned at backing plate 1 middle part.

Brush bar 4 belows are provided with powder groove 5.

The length of brush bar 4 is greater than the width of heavy curtain 3.

Using method:

First kind: during beginning, motor is inoperative, when the writer writes the heavy curtain 3 of backing plate 1 front surface when full, actuating motor, thus will not write or the heavy curtain of wiped clean go to backing plate 1 front surface so that write;

Second kind: during beginning, motor is inoperative, the writer is written on the part in heavy curtain left side with literal, when this part is write when full actuating motor, the part of being write is then changed over to the backing plate rear side and is treated wiping, the writer then can continue to write in the zone of not writing of having write the zone near heavy curtain, because the heavy curtain rotation slowly, thereby can make the writer keep writing state always, thereby improve the quality of teaching, strive for more instructional blocks of time; And because the heavy curtain part of having write when entering backing plate rear surface side, is not at once by wiping, therefore, under situation about being necessary, also can pass through reverse motors, looking back previous content, thereby further improve the quality of teaching.

Embodiment 2: being with the difference of embodiment 1, is 1.5mm over against the heavy curtain 3 of backing plate 1 front surface and the ultimate range of backing plate 1.

Embodiment 3: being with the difference of

embodiment

1 or 2, is 1.5mm over against the heavy curtain 3 of backing plate 1 front surface and the ultimate range of backing plate 1; The angle that is positioned at heavy curtain 3 formation of backing plate 1 rear surface side is 175 °.

Embodiment 4: be that with the difference of

embodiment

1 or 2 or 3 brush bar 4 is positioned at the side of backing plate 1 away from the rotating shaft 2 that is in transmission connection with motor; This setting is in order to make the zone of having been write on the heavy curtain 3 when entering backing plate 1 rear surface side, as much as possible content written to be kept the time more longways so that under situation about being necessary with the motor counter-rotating to look back previous content.

Embodiment 5: be that with the difference of

embodiment

1 or 2 or 3 or 4 backing plate 1 all is fixed on the ground with brush bar 4.

Claims

1. blackboard structure, comprise backing plate (1) with front and rear surfaces, respectively be located at backing plate (1) left and right sides rotating shaft (2), keep the heavy curtain (3) of tensioning and be used to drive the motor that one of them rotating shaft (2) is rotated around rotating shaft (2) and with two rotating shafts (2).

2. a kind of blackboard structure according to claim 1 is characterized in that, is 0.5mm to 3mm over against the heavy curtain (3) of backing plate (1) front surface and the ultimate range of backing plate (1).

3. a kind of blackboard structure according to claim 1, it is characterized in that, this kind blackboard structure also comprises and is positioned at that backing plate (1) rear surface side vertically is provided with and the static brush bar (4) of backing plate (1) relatively, and described brush bar (4) is inconsistent and make heavy curtain (3) close to backing plate (1) rear surface with heavy curtain (3).

4. a kind of blackboard structure according to claim 3 is characterized in that, the angle that is positioned at heavy curtain (3) formation of backing plate (1) rear surface side is 170 ° to 175 °.

5. according to claim 3 or 4 described a kind of blackboard structures, it is characterized in that described brush bar (4) is positioned at backing plate (1) middle part.

6. a kind of blackboard structure according to claim 5 is characterized in that, described brush bar (4) below is provided with powder groove (5).

7. according to claim 3 or 4 described a kind of blackboard structures, it is characterized in that the length of described brush bar (4) is equal to or greater than the width of heavy curtain (3).

8. a kind of blackboard structure according to claim 1 is characterized in that, described rotating shaft is arranged with rubber sleeve on (2).

9. a kind of blackboard structure according to claim 7 is characterized in that, the inner surface of described heavy curtain (1) is covered with the rubber skin.