The double-purpose environment friendly blackboard
Technical field
The utility model belongs to the improvement of the blackboard structure that school instruction uses, particularly a kind of double-purpose environment friendly blackboard.
Background technology
Blackboard is the indispensable teaching aids of each universities, middle and primary schools.Traditional blackboard generally is to be made of a fixing cement wall surface or a block plate or plastic plate, is fixed in during use on the metope, and hand-held chalk is write thereon.Word is write Man Houzai and with blackboard eraser letter written with chalk is wiped, and so not only write area is little, and blackboard wiping is wasted time and energy, and often causes chalk dust to fly upward, and pollutes indoor environment, and it is healthy to influence teachers and students.
The utility model content
The purpose of this utility model is to provide a kind of double-purpose environment friendly blackboard, and it is simple in structure, and write area is big, does not have the chalk ash pollution phenomenon, and it is healthy not influence teachers and students.
The purpose of this utility model is achieved in that a kind of double-purpose environment friendly blackboard, comprise blackboard framework, both sides at blackboard framework vertically are being provided with driving and driven roller respectively, one end of drive roll is being provided with rotating driving device, around being set, flexibility writes zone face between the driving and driven roller, side at blackboard framework is being provided with blackboard brush, and blackboard brush contacts with writing zone face, and the height of blackboard brush is complementary with the height of writing zone face.
When the utility model uses, blackboard framework is fixed on the metope and can writing the enterprising andante book of zone face.The rotation drive roll can drive writes the zone face rotation, can be cleaned with water the letter written with chalk of writing on the zone face by the blackboard brush that is arranged on blackboard framework one side simultaneously, can continuously carry out writing on the blackboard like this, not only write area is big, and without the manual wipping blackboard, time saving and energy saving.Cleaned with water the chalk dust that gets off by blackboard brush and all concentrate and fall blackboard framework one side and put together, the phenomenon that can cause chalk dust to fly upward can not polluted indoor environment.
The utility model is simple in structure, and is cheap for manufacturing cost, can continuous writing, and the written information amount is big, and need not manually clean letter written with chalk with water, does not have chalk ash pollution, and it is healthy not influence teachers and students, easy to use.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is a main TV structure schematic diagram of the present utility model;
Fig. 2 is a plan structure schematic diagram of the present utility model.
The specific embodiment
A kind of double-purpose environment friendly blackboard, as shown in Figure 1 and Figure 2, comprise blackboard framework 2, driving and driven roller 7,5 vertically is being set respectively in the both sides of blackboard framework 2, one end of drive roll 7 is being provided with rotating driving device, and said rotating driving device is motor or rotary handle 4.Adopt 7 rotations of Motor Drive drive roll can further improve automatization level of the present utility model.
Write zone face 3 around flexibility is being set between the driving and driven roller 7,5, the said zone face 3 write is for being made of rubber strip or woven belt or plastic tape.
Side at blackboard framework 2 is being provided with blackboard brush 6, and blackboard brush 6 contacts with writing zone face, and in writing zone face 3 rotation processes, blackboard brush 6 can be cleaned the letter written with chalk on it simultaneously with water like this.The height of blackboard brush 6 is complementary with the height of writing zone face 3.The compression spring is being set on the bracing frame of blackboard brush 6, is writing on the zone face 3, improving the effect of cleaning with water letter written with chalk in order to blackboard brush 6 is pressed on.
Opposite side at blackboard framework 2 is being provided with driven voller tensioning apparatus 1, in order to outside stretching driven voller 5, thereby makes that writing zone face 3 can keep open and flat, is convenient to write.