CN2449934Y

CN2449934Y - Dustless blackboard and blackboard eraser

Info

Publication number: CN2449934Y
Application number: CN 00249791
Authority: CN
Inventors: 曾盛嘉; 金元园
Original assignee: Xiangming High School Shanghai
Current assignee: Xiangming High School Shanghai
Priority date: 2000-10-26
Filing date: 2000-10-26
Publication date: 2001-09-26
Anticipated expiration: 2010-10-26

Abstract

The utility model relates to a dustless blackboard and a blackboard eraser. The dustless blackboard is characterized in that the dustless blackboard also comprises a board body with a plurality of tube holes besides comprising a writing board surface, wherein, the writing board surface is in a transparent shape, and is thickly covered on the board body with a plurality of tube holes; white resin is primed in every tube hole of the board body; a small magnetic post which can float in the tube hole is also arranged in every tube hole; N poles of all small magnetic posts consistently face to the board surface. The blackboard eraser which is matched with the blackboard is provided with a magnetic erasing block on an eraser board; the erasing surface of the magnetic erasing block is also in N pole. The utility model has the fundamental advantages that dust does not appear in the least when the blackboard is written or erased; the utility model can really realize the idealization of dustless blackboards.

Description

Dust-free blackboard and blackboard eraser

The utility model relates to writing device, specifically is a kind of dust-free blackboard and blackboard eraser.

Traditional blackboard is made with timber, makes with timber and coats pitch-dark blackboard behind the plate face body.Blackboard is made with special frosted glass preferably.Generally on blackboard, write with chalk, and with the wiping of felt matter blackboard eraser.The greatest drawback of traditional structure blackboard is a dust from flying, and contaminated environment is harmful to health.For overcoming teachers and students' this difficult problem of " eating chalk dust ", long-term constantly have the dust-free blackboard of various structures and blackboard eraser to be disclosed in the patent document of various countries, if any blackboard is made roller shutter type, it is write in front, blackboard is rolled onto mechanical again wiping behind; Has plenty of the improvement blackboard eraser, blackboard eraser is designed to structures such as electric dust absorption formula, rinsing type, various improved blackboards like this and blackboard eraser, still can not solve the dust from flying problem when erasing the board fully, dust stains finger and the dust problem that descends slowly and lightly in the time of more can not solving chalk and write, and use very not convenient yet.The modern blank that has occurred again writing with pen reaches advanced electronic whiteboard, but the former handwriting is thinner, should not make large-scale blackboard, and is difficult for wiping, and the latter costs an arm and a leg, and is difficult to popularize.

The purpose of this utility model provides a kind of dust-free blackboard and blackboard eraser, makes it not have a bit dust when writing with wiping and waves.

Realize the utility model of above-mentioned purpose, its blackboard is except that including a clipboard face, also include a multitube orifice plate body, the clipboard face of the utility model blackboard is transparence, Mi Gai is on multitube orifice plate body, and in each pore of plate body, all be perfused with white resin and be provided with a small magnetic rod that can float within it, the N utmost point of each small magnetic rod (or S utmost point) is consistent with the plate face.The blackboard of structure like this, when writing on the plate face with the S utmost point (or N utmost point) of magnetic pen, the small magnetic rod in the corresponding part plate body is then inhaled by magnetic pen and is floated up, and makes to show blackness handwriting or point on white (color of white resin) the plate face.

Blackboard eraser of the present utility model then is a kind of magnetism eraser, and its primary structure is, is provided with the wiping magnetic patch on wiping board, and the wiping surface of this wiping magnetic patch is the N utmost point (or S utmost point).Then when the blackboard eraser with structure like this came blackboard wiping, its wiping surface that is the N utmost point (or S utmost point) promptly can push away the small magnetic rod that is the N utmost point (or S utmost point) in the plate body together and sink, and makes the plate face revert to white.

From the above mentioned as seen, the utility model is to utilize the principle that the magnet same sex is repelled each other, there is a natural attraction between the sexes to make, be provided with in the plate body can be in white resin the upper and lower small magnetic rod that drifts along, when writing with magnetic pen, make it to inhale mutually, small magnetic rod is drawn onto under the transparent panel face and constituting word, symbol, use magnetism eraser during wiping with the small magnetic rod same sex with small magnetic rod, small magnetic rod is pushed in the white resin, makes the transparent panel face revert to white.See that thus basic advantage of the present utility model is to write or do not have during wiping at all dust to occur, and can really realize the ideal of dust-free blackboard.

Description of drawings:

Fig. 1 is the three-dimensional partial schematic sectional view of the utility model.

Embodiment of the present utility model as shown in drawings.Seen that by Fig. 1 present embodiment has one and is the clipboard face 1 of transparence, and include a multitube orifice plate body 2, transparence clipboard face 1 Mi Gai is on multitube orifice plate body 2.In each pore of plate body 2, be perfused with white resin 4 as seen from the figure and be provided with a small magnetic rod 5 that can float within it, and make the N of each small magnetic rod 5 extremely consistent towards the plate face.

Magnetic dustless blackboard must be used magnetism eraser correspondingly as mentioned above, and its structure is to be provided with the wiping magnetic patch on wiping board, and the wiping surface of this wiping magnetic patch also is the N utmost point.

Claims

1, a kind of dust-free blackboard includes a clipboard face, it is characterized in that: also include a multitube orifice plate body; The clipboard face is transparence, and Mi Gai is on multitube orifice plate body; Be perfused with white resin and be provided with a small magnetic rod that can float within it in each pore of plate body, the N of each small magnetic rod is extremely consistent with the plate face.

2, a kind of blackboard eraser that is used with dust-free blackboard according to claim 1, it is characterized in that: be provided with the wiping magnetic patch on wiping board, the wiping surface of this wiping magnetic patch is the N utmost point.