CN2182072Y

CN2182072Y - Movable blackboard

Info

Publication number: CN2182072Y
Application number: CN 93235784
Authority: CN
Inventors: 李卓
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-12-21
Filing date: 1993-12-21
Publication date: 1994-11-09
Anticipated expiration: 2003-12-21

Abstract

A movable blackboard is mainly composed of a guide frame, a chain wheel and two blackboards. The weight and the area of the two blackboards are equal, so that the blackboards can move up and down conveniently and save labor. The blackboard has the advantages of simple and reasonable structure and convenient use, and enlarges the use area of the blackboard. The product is suitable for teaching in schools such as colleges and universities, middle schools and primary schools.

Description

Moving blackboard

The utility model relates to a kind of portable blackboard, mainly is to be used in the blackboard that the plate face was gone up and enlarged in teaching.

The blackboard for education that uses in large, medium and small school all is one at present, the plate face is fixed, saying class hour, serve as a teacher when writing full blackboard and will wipe top content so that then down write, the slow student who so just has some to write takes notes and does not catch up with, and the teacher often erases the board and will suck a large amount of dust, influences healthy.Blackboard of the present utility model can just move and can address these problems.

The purpose of this utility model provides a kind of removable and expansion plate face, reduces the portable blackboard of Dust Capacity.

The utility model mainly is made of leading truck (1), chain (2), sprocket wheel (5), blackboard (3) and blackboard (4).Two blackboards are connected also and can move up and down in the chute of leading truck (1) by sprocket wheel (5) by chain (2).

The utility model is simple and reasonable, has not only enlarged the plate face but also reduced Dust Capacity, and two blackboard weight are identical, and gently lifting with have gentle hands can random mobile blackboard.It is the desirable teaching aid that large, medium and small school uses.

Fig. 1 is the utility model front view;

Fig. 2 is the utility model top plan view;

Fig. 3 is the utility model side-looking cut-away view.

Below in conjunction with description of drawings embodiment of the present utility model:

The utility model mainly is made of leading truck (1), chain (2), sprocket wheel (5), blackboard (3) and blackboard (4).Two blackboards are connected also and can move up and down in the chute (6) of leading truck (1) by sprocket wheel (5) by chain (2).Blackboard (3) is identical with the weight of blackboard (4), and area is identical, and chain (2) is installed at the right and left of blackboard (3) and (4), and sprocket wheel (5) is fixed on the entablature of leading truck (1).Blackboard is installed in the front, classroom, and blackboard bottom surface absolute altitude equates that with former blackboard the blackboard effective area is 4.68 square metres.Blackboard below during use (4) write mention gently after full can move on to above, and blackboard (3) just moves on to following can then writing, top content need not be wiped and allow the slow student who writes continue to record the note, and the teacher also no longer sucks a large amount of dust because of frequently erasing the board.This product is applicable to that large, medium and small school uses.

Claims

1, a kind of portable blackboard, it is characterized in that: it is made of leading truck (1), chain (2), blackboard (3), blackboard (4), sprocket wheel (5), and two blackboards are connected also and can move up and down in the chute (6) of leading truck (1) by sprocket wheel (5) by chain (2).

2, portable blackboard according to claim 1 is characterized in that: blackboard (3) is equal in weight with blackboard (4), and area is identical.