CN1298804A

CN1298804A - Curtain-type blackboard of plastic film

Info

Publication number: CN1298804A
Application number: CN 01107711
Authority: CN
Inventors: 李光谦
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-01-03
Filing date: 2001-01-03
Publication date: 2001-06-13

Abstract

A curtain type plastic membrane black board for cleassroom is designed as follows: the blackboard body and frame made of wood plank, two ends of which are designed with rotary drums. The left side rotary drum is wound with enough black plastic membrane body, after the membrane body has covered the blackboard surface, then the right side rotary drum is wound up. There are upper and low two press rods controlled by two elastic press pins and sliding press rod. The ourtain type plastic membrane blackboard need not to scrub in classroom during class being on, thereby this eliminates the contamination due to chalk dust. The completely used membrane surface can be washed for reuse.

Description

Curtain-type blackboard of plastic film

The present invention relates to a kind of classroom curtain-type blackboard of plastic film, especially avoided the operation that erases the board.

At present, known classroom blackboard has two kinds of plank type and cement mo(u)lds.This blackboard often need wiping on the classroom, has caused the pollution of powder, has influenced teachers and students' physical and mental health.

The purpose of this invention is to provide a kind of curtain-type blackboard of plastic film, it need wiping on the classroom, but rolls writing full black film, is paved with the black film of not writing again.

The object of the present invention is achieved like this: invention has at first designed a kind of plank type blackboard body framework, has designed two cylinders at its two ends, has rolled up the plastics film body of the black of capacity on the cylinder in left side, and the reseal membrane body is covered with the plate face, and volume is gone up the cylinder on right side.After template die was write and expired, the cylinder on rolling right side was rolled film body, thereby repaves the film body of not writing.And, the depression bar under two elasticity pressure nails control is up and down arranged, and slip depression bar therebetween, the smooth of film body guaranteed.

Owing to adopt such scheme, just avoided as plank type and cement mo(u)ld blackboard, the situation of wiping on the classroom, thus avoided the pollution of chalk foam, guaranteed teachers and students' physical and mental health.Simultaneously, opened the beginning for the classroom with the industrialization production of blackboard.

The invention will be further described below in conjunction with drawings and Examples.

Fig. 1 is the curtain-type blackboard of plastic film schematic diagram.

1. frameworks, 2. blackboard plate bodys, 3.4 cylinder 5.6.7.8 elasticity are pressed nail 9.10 depression bars 11. slip depression bars 12. plastics black films 13. rocking handles 14.15 framework legs 16. black film traffic directions among the figure

In Fig. 1, the upper surface of framework (1) and blackboard plate body (2) and cylinder (3.4), should be in same plane, elasticity presses nail (5.6.7.8) should keep enough pressure, make up and down two depression bars (9.10) compacting some, and the process that slip depression bar (11) should write with the teacher and sliding to the right like this, has just guaranteed the smooth of plastics black films (12).When whole face write full after, a hand firmly lifts the slip depression bar, two depression bars are also loosening thereupon up and down, the hand handle (13) that shakes of another, plastics black film just press black film traffic direction (16) to the right operation, and the cylinder of volume on the right of going up.Like this, the data on the face can be kept a period of time, wait whole face to write after, can take down the right cylinder (simultaneously, the cylinder on the left side also can be lifted down), reuse after being washed.

Claims

1. curtain-type blackboard of plastic film, blackboard plate body and framework are arranged, it is characterized in that: designed a kind of plank type blackboard body framework, two cylinders have been designed at its two ends, plastics film body that surperficial topped one deck of blackboard plate body can write with chalk, and designed up and down two depression bars and therebetween slip depression bar.

2. curtain-type blackboard of plastic film according to claim 1, its two cylinders and framework and blackboard plate body are in same plane; And two cylinders can be lifted down.

3. curtain-type blackboard of plastic film according to claim 1 has the depression bar under two elasticity pressure nails control up and down, and slip depression bar therebetween.