CN86102246A - Cirele-round self-erasing dust-free blackboard - Google Patents

Abstract

Cirele-round self-erasing dust-free blackboard is to go up the new type blackboard that uses for teaching, and it can be exempted dust pollution and smear the problems such as time-consuming of wiping.Owing to adopted the flexible curtain of writing that can circle round and recycle, carry out overleaf so can allow comprehensively smear to wipe to move to change, the dust that flies upward is fallen within down in the groove water can be closed effectively; And the action of strengthening smearing wiping can carry out when writing, and can smear and wipe clean, and saves time again.The present invention writes usefulness for chalk, and structure is simpler, needn't newly put a tool, also need not the material and the technology that rely on the energy and be difficult for obtaining.

Description

Cirele-round self-erasing dust-free blackboard

The present invention relates to the improvement of the blackboard of aspect application such as culture and education.

Blackboard is an indispensable instrument in the teaching, and blackboard existing widespread use, that write with chalk, and dust from flying pollutes greatly during use, smears wiping will spend certain hour and be difficult for Ca De Net, and these shortcomings have been brought adverse influence to teaching.Expect what pen was write if change with Tu, then the price because of pen is expensive, student's visual sense is uncomfortable, the Tu material easily causes new more harmful problems such as pollution to be difficult for promoting, if use electric teaching methods for it, then the surprising non-Electric region of expense also can't use.

The objective of the invention is to provide a kind of improved blackboard, it not only can be reduced or remitted dust pollution and smear and wipe problems such as time-consuming, also can be teaching new dirigibility is provided.And its is main writes usefulness for chalk, need not to rely on complicated technology and material, and cost and usage charges are all lower, be easy to promote.

Invent and be achieved in that adopting flexible material to make curtain supplies to write, in the time will smearing wiping, just the curtain that the writing part is arranged is gone to the back side comprehensively, allow no writing partly forward the positive next usefulness that supplies to write again to.The back side of whole device, side use cover totally-enclosed, and dust collection row facility is set, and pollute with deduction and exemption.Smear and wipe action then overleaf, when rotating by curtain or some simple motions that add in the process of writing again implement, save time.

The present invention is except that the more above-mentioned advantages of tool, also because of need not energy supply.Also can promote in the rural area; Again because of having adopted the revolution loop structure for writing object.Can increase the area of Gong writing, and not high because of the technical requirement of each object, available junk (as: old blackboard, tables and chairs) transformation substitutes,, estimate that cost can be controlled within 150 to 200 yuan so cost is further reduced.

Concrete enforcement of the present invention is provided by following structure and accompanying drawing.

Fig. 1 is the forward front view that revolves self-erasing dust-free blackboard according to Gei Chu De rotation of the present invention, from last visible sequence number (1) to (14); Fig. 2 be the A-A of Fig. 1 to cut-open view, from last visible sequence number (15) to (23); Fig. 3 is its schematic perspective view.

The details and the working condition of the concrete device of proposition below in conjunction with Fig. 1 and Fig. 2 detailed description according to the present invention.

For write usefulness write the curtain (3) be flexible ring texture, every width of cloth is enclosed within up and down on a pair of cylinder (7), in the time will wiping writing, can shake handle (4), cylinder (7) is rotated, drive is write curtain (3) circulation and is moved, there is character segment to move on to the back side, reach erasing by moving up and down of brush bar (21) simultaneously, do not have writing partly to expose, for writing usefulness again.Blackboard divides left and right sides two-stage structure, respectively is furnished with a width of cloth and writes curtain (3), and two width of cloth all can be without interfering with each other arbitrarily move, and that temporarily stored literal such as outline and so on are optional to be write therein on the width of cloth.(the normally left side).

The curtain (3) of writing as writing is revolved in the process at the back side, will be subjected to the erasing of many row brushes bar (21).As strengthening the erasing effect, the user can have a mind to step on several pedals (13) down off and in the time of writing, and brush bar (21) will move back and forth erasing (whenever step on and make a round trip) under the effect of connecting rod (23) brush holder (20) tension spring (18).

Totally enclosed type guard shield (9) can prevent that dust from flying out, and for collecting and remove dust, is provided with tank (1) below writing curtain (3), can carry out irrigation and drainage by water delivering orifice (2) and water inlet (12) and clean.

Guard shield (9), tank (1) and brush holder (20) all cause the form that is easy to dismantle, and wipe bar (21) and repairing so that change.

Header board (15) be close to write the curtain (3) so that write the curtain (3) smooth-going being convenient to write.The effect that helps wiping board (16) be make write curtain (3) can be better with wipe bar (21) and contact Er Ca Net.

Eight rolling bearings (5), four limit spindle noses (6) and two middle pedestals (11) are to be used to support upper and lower two to (totally four) cylinder (7), and they can arbitrarily be rotated without interfering with each other.

Integral support (8) is the center backbone of fastening each parts, and its both sides are provided with four fixed supports (10), so that whole blackboard structure can be convenient to be hung on the position that needs usefulness.

Bearing (14) can set firmly on the ground, with supporting pedal (13).

Sliding pin (19) and position block (22) are to be used to adjust brush holder (20) and brush bar (21) to the snap-in force of writing curtain (3), when energetically pedal (13) being depressed into when minimum, sliding pin (19) just can be under the effect of connecting rod (23) and brush holder (20), drop down onto with angle place, position block (22) lower end and contact, to reduce, prevent to write curtain (3) and shift inconvenience writing the snap-in force of curtain (3).

Limit mouth cloth strip of paper used for sealing (17) is a sealing effectiveness of strengthening guard shield (9).

Claims (1)

1. The De rotation that can be recycled revolves self-erasing dust-free blackboard.It comprises that mainly two width of cloth write curtain [3], and supporting, smear wipings, device such as prevent dust.It is characterized in that:

   1, to write curtain [3] be to adopt flexible material to make the ring-type snare to two width of cloth, and two width of cloth can circulate mobile without interfering with each other.

   2, writing curtain (3) is to transfer to back side when place, by many row brushes bar (21 〕 Ca Net's.

   3, be provided with guard shield (9), fly out to prevent the dust of brushing bar (21) generation when smearing erasable curtain (3), and be provided with tank (1), be beneficial to cleaning.

   4, be provided with pedal (13), connecting rod (23), brush holder (20) and tension spring (18).Allow the user when writing, pilot brush bar (21) is strengthened smearing the wiping number of times to writing curtain (3), and can utilize sliding pin (19) and position block (22) to adjust brush bar (21) to writing the snap-in force of curtain (3).

Images