CN2145715Y - Long-handle chalk brush - Google Patents

Abstract

The utility model discloses a long chalk brush for in the aspect of the civilian teaching has the chalk brush of a long and semi-cylindrical brush face, and the during operation is convenient and handy, can make the blackboard eraser person relatively keep away from this high concentration dust source region of blackboard eraser to be favorable to teachers and students, especially the health of the mr who often will erase the blackboard.

Description

Long handle chalk powder brush

The utility model is used for the culture and education aspect, reduces the long wushu eraser that teachers and students suck chalk dust.

In teaching, because chalk dust seriously affects teacher, student's health.The means of current minimizing chalk dust mainly are to produce dust-free chalk, but dust-free chalk is because factor such as its cost is too expensive fails to popularize in an all-round way so far, and nearly all school is all also with the dirt chalk is arranged.

The student, especially front-seat short student, from the primary school to the senior middle school so university all life in the classroom, the study of time more than ten years will be arranged, but get almost not listening of tuberculosis because of chalk dust.And general teacher does not need as the student, all gives a lesson in one day, is last three, four class at most, then has much but get the lung patient.Here most important reason is that teacher is too near from this dust source of blackboard brush when erasing the board.And the student, even it is all more farther to be sitting in front-seat student, the concentration of its dust can and drop on the ground because of the diffusion of dust and lower widely.

The utility model is with traditional eraser, has a long eraser of (about 3 meters) instead, and the people is compared away from this dust source of eraser, with the minimizing person's of erasing the board dust soakage.

Specific practice of the present utility model is to open several screws in the existing chalk brush finish, also make a flat board suitable with the chalk brush finish at long front end, and it is corresponding with the hole on the eraser also to open several holes.With screw eraser can be used on long admittedly.To the product of later new production, its eraser brush finish can make half round post or circular arc into, and wipe can be more smoothly, more convenient.

Though the utility model can not be eradicated pollution sources, can make the person of erasing the board leave this high concentrate dust source region of eraser.If note using method again, when erasing the board, door and window to be opened, wind blows into from window, and the people stands in window and here wipes, otherwise then stands in a wiping here, and then the health to the person of erasing the board is more favourable.

Figure is the long eraser of half-cylindrical brush finish of the present utility model.

Claims (2)

1, long eraser, it is characterized in that: long have flat board to front end, and eraser is connected by screw with dull and stereotyped.

2, according to the described eraser of claim 1, it is characterized in that: eraser is a garden arc column shape.

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