CN2212504Y - Dustless blackboard - Google Patents

Abstract

The utility model relates to a dustless blackboard which uses a drum type black rubber or flexible plastic belt added with magnetic substances as a blackboard surface, wherein, the blackboard surface is arranged on an upper and a lower rolling drums and is driven to rotate by a single-phase motor or a hand device, the lower part of the lower rolling drum is connected with a closed dust storing box in which a brush is arranged, and dust is automatically removed by the brush and is hermetically collected when the blackboard surface is rotated. Words can be continuously written on the blackboard surface, and writing contents can be kept.

Description

Dustless blackboard

The utility model belongs to a kind of dust-free blackboard, and dedusting automatically, also has the characteristics of magnet board concurrently.

Normal blackboard has two types, and a kind of is the cement blackboard, and another kind is wooden blackboard.These two kinds of blackboards all have the following disadvantages: 1. the plate face can not be fully used.The blackboard height is certain, and most teachers reach the top of blackboard.If reduce the blackboard height, front-seat student and dais can be blocked the student of back again.2. the long student who is sitting in both sides of blackboard wants the other end of side-looking blackboard.3. can occur a large amount of dust (dust-free blackboard still has low amounts of dust) when erasing the board, influence teachers and students' physical and mental health.4. the normal blackboard effect is single, and needs periodic maintenance.

The purpose of this utility model is: make blackboard direct-view plate face narrow down to 1/3～1/2 of normal blackboard, usable floor area is constant; Can make the plate face place the center, classroom, avoid the student to look side ways; The plate face is write the back and is upwards rotated, and the plate face is fully utilized; Automatically dedusting in the rotation, and dust is collected in sealing; Also the plate face can be made the magnetic sheet face, have the function of magnet board concurrently; Do not change original writing implement (being chalk), can remove and reinstall.

The purpose of this utility model is achieved in that cylindrical black rubber or flexible plastic band, is installed on upper and lower two drums, drives upper and lower drum by motor or hand gear respectively and rotates, thereby the plate face is rotated.Lower cylinder below is connected with the dust-collecting box of sealing, the brush that becomes mildewed in the box, at ordinary times with the plate emaciated face from, to preserve written contents, by button hairbrush is abutted against on the plate face when wiping word, automatic dedusting when the plate face rotates, dust is closed in and stores up in the box.

Owing to adopt such scheme, can avoid the student frequently to exchange seats, exempt the harm that teachers and students' physical and mental health is caused because of dust pollution, also can save and purchase magnet board and cause overlapping investment.

Below in conjunction with accompanying drawing and example the utility model is further specified.

Figure one is the utility model front structural map;

Figure two is plate face revolution speed control system side views in the electric device:

The drum 3. lower cylinders 4. single-phase motors 5. V belts 6. triangular fovea grooved roller 7. backguys 8. lower shafts crank 11. dust-collecting box 12. brush 13. plate face rotational speed governor ironwares that become mildewed that cog on 9. hand gear middle gears, 10. gears on the 1. plate faces 2. among the figure

In figure one, cylindrical black soft rubber or plastics band plate face (1), be installed on drum (2) and the lower cylinder (3), motor (4) links to each other with the main shaft of last drum (2) by V belt (5), gear (8) on gear on the hand gear (9) and lower cylinder (3) main shaft matches, at ordinary times the main shaft of hand gear with lower cylinder (3) separated, move to the side, be close to metope.Lower cylinder (3) below is connected with is equipped with the brush (12) that becomes mildewed and starts motor (4) or shake crank in the hand gear (10) and can make plate face (1) rotation in dust-collecting box (11) box of a sealing, the brush (12) that becomes mildewed of close adhesion plate face (1) was wiped clean plate face (1) automatically when plate face (1) rotated, and dust is closed in the dust box (11) simultaneously.

In figure two, after motor (4) started, tension backguy (7) tightened V belt (5) by triangle groove circle roller (6), drum in the drive (2) motion.Its objective is both control panel face (1) rotating speeds, can protect motor (4) again.

Claims (4)

1, a kind of dust-free blackboard, the soft board face is rotatable, and dedusting automatically, it is characterized in that: the plate face is rotated thereby motor or hand gear drive drum, automatic dedusting and airtight collection when the plate face rotates, the plate face can be made into the magnetic sheet face, in the electric device by backguy control panel face rotating speed.

2, dust-free blackboard according to claim 1 is characterized in that: the dust-collecting box of below sealing, be equipped with the brush that becomes mildewed, automatic dedusting and collection when the plate face rotates in the box.

3, dust-free blackboard according to claim 1 is characterized in that: with black magnetic rubber or flexible plastic band is the plate face, has the magnet board function concurrently.

4, dust-free blackboard according to claim 1 is characterized in that: by backguy control panel face rotating speed, protected motor simultaneously in the electric device.

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