CN2307684Y

CN2307684Y - Blackboard without chalk dust

Info

Publication number: CN2307684Y
Application number: CN 97231623
Authority: CN
Inventors: 马建农
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-12-20
Filing date: 1997-12-20
Publication date: 1999-02-17
Anticipated expiration: 2007-12-20

Abstract

The utility model relates to a blackboard without chalk dust. The utility model is composed of an annular blackboard, two drums arranged in the annular blackboard, a roll-shaped blackboard eraser which is closely abutted on the back face of the annular blackboard, a lower chalk dust collecting drawer, an upper blackboard cover, baffles of both ends, a motor and a transmission mechanism of the motor, wherein, the drums, the roll-shaped blackboard eraser, the motor and the transmission mechanism of the motor are connected in a frame which forms a closed structure. The back face of the annular blackboard is positioned in a closed cavity, the chalk handwriting on the annular blackboard is cleanly erased by the roll-shaped blackboard eraser so that chalk dust can not be flown in a classroom, and thus a problem of chalk dust pollution which always troubles teachers and students is solved.

Description

Ashless blackboard

The utility model relates to a kind of articles for writing, particularly a kind of reusable clipboard.

At present, the teacher in the classroom to class hour on the student, the letter written with chalk of on blackboard, writing, chalk dust will fly upward when wiping, the speed of wiping is fast more, flies upward many more soon more.In order to save the class period, it is that The faster the better that the teacher erases the board, and preferably quickly just its polishing, this pollution to the space, classroom is extremely serious.Because the classroom of the usefulness of giving a lesson, its inner space was just limited originally, so this healthy influence to teacher and student is very big.Though have or not grey chalk now,, also can't in school, promote the use of because its cost is higher.

The purpose of this utility model provides a kind of to the free of contamination ashless blackboard in space, classroom.

Scheme of the present utility model is: adopt an annular blackboard, two cylinders that can drive it and rotate are set in annular blackboard circle two ends, near blackboard surface 1～2 roll forming blackboard eraser is set in the annular blackboard back, 1～6 dust collection drawer is set below annular blackboard, the blackboard lid is set above, two ends are provided with baffle plate, motor through 1 or 2 cylinders of transmission mechanism drive and the work of roll forming blackboard eraser is set, and cylinder, roll forming blackboard eraser, motor and transmission mechanism thereof all are connected in the framework that constitutes sealing.

The plane backing plate of a hard is set at the back side of annular blackboard writing surface.The annular blackboard front is the writing surface through scared no-reflection.The tensile strength muscle is set in the annular blackboard both sides.Motor also can be a wind that can rotate.

The utility model is owing to adopt annular blackboard, and erasing the board is to be wiped quickly and easily totally by the roll forming blackboard eraser in the face closure chamber thereafter, and chalk dust can not fly upward in the classroom, and this has solved the chalk ash pollution that always perplexs teachers and students.

Below in conjunction with accompanying drawing the utility model is elaborated.

Fig. 1 is an one's own judgment partial schematic sectional view of the present utility model;

Fig. 2 is the A-A schematic views of Fig. 1.

With reference to Fig. 1, Fig. 2, ashless blackboard is to be made of annular blackboard 4, cylinder 6,11, roll forming blackboard eraser 7,9, dust collection drawer 1, blackboard lid 12, baffle plate 5, motor 10 and rotating band 8 thereof.Annular blackboard 4 is the plastic plates with tensile strength, and outer surface is through the scared processing of frosted, and no-reflection, chalk are write not sliding pen, is provided with in two boundary layers and strengthens the tensile strength muscle.Cylinder the 6, the 11st with annular blackboard 4 stretchings, and has enough power to drive annular blackboard 4 rotations.Cylinder 6,11 can be one thick one thin.Inboard on 6 on cylinder is withstood by spring 3 respectively up and down, protects positive annular blackboard 4 stretchings, because of there is clearance groove cylinder 6 axle bed medial and lateral.The back side by annular blackboard 4 writing surfaces is provided with a fixing rigid planar backing plate 2, helps chalk and writes on annular blackboard 4.Near blackboard surface 2 roll forming blackboard erasers 7,9 are set in annular blackboard 4 backs, one in front and one in back, the thick wiping in front, the thin wiping in back.3 dust collection drawers 1 are set below annular blackboard 4, make roll forming blackboard eraser 7,9 wipe chalk dust down and in sealed hollow, drop within it, can be when general cleaning with 1 extraction of dust collection drawer, the chalk dust that falls inside outwelled get final product.Blackboard lid 12 is set in the above, and two ends are provided with the retaining utmost point 5, constitute enclosed cavity with the back sidewalls.Front at annular blackboard 4 two is provided with cover plate 13, can fuse with baffle plate 5, is fixed on the framework.The axle bed and the motor 10 of cylinder 6,11, roll forming blackboard eraser 7,9 all are fixed on the framework.Motor 10 drives cylinder 11,7,9 rotations of roll forming blackboard eraser by driving-belt 8 after slowing down.

When the word of writing previously at annular blackboard 4 need be wiped, starting motor 10 makes cylinder 11, roll forming blackboard eraser 7,9 rotate simultaneously respectively through each bar driving-belt 8, the annular blackboard face and the cylinder 6 of word are also rotated under the drive of cylinder 11 simultaneously, there is the plate face of word to enter sealing chamber, wipe down roll forming blackboard eraser 7,9 moving commentaries on classics near the plate face, letter written with chalk is promptly wiped clean, and the chalk dust of wiping can fall in the dust collection drawer 1 at leisure.The former writing surface of wiping clean just forwards the front of backing plate 2 to simultaneously, for continuing to write.

Claims

1, a kind of ashless blackboard, comprise blackboard, it is characterized in that: described blackboard is annular blackboard [4], two ends in annular blackboard [4] circle are provided with 2 cylinders [6 that can drive it and rotate, 11], near blackboard surface 1～2 roll forming blackboard eraser [7] is set in annular blackboard [4] back, 1～6 dust collection drawer [1] is set below annular blackboard [4], blackboard lid [12] is set above, two ends are provided with baffle plate [5], be provided with one through transmission mechanism [8] drive cylinder [6 or/and 11], the motor [10] of roll forming blackboard eraser [7] work, cylinder [6,11], roll forming blackboard eraser [7], motor [10] and transmission mechanism [8] thereof all are connected in the framework that constitutes sealing.

2, ashless blackboard according to claim 1 is characterized in that: the backing plate [2] that a hard is set at the back side of annular blackboard [4] writing surface.

3, ashless blackboard according to claim 1 and 2 is characterized in that: described annular blackboard [4] is the writing surface through scared no-reflection.

4, ashless blackboard according to claim 1 and 2 is characterized in that: described annular blackboard [4] is provided with the tensile strength muscle in the both sides.

5, ashless blackboard according to claim 1 and 2 is characterized in that: described motor [10] can be a wind that can rotate.