CN2158790Y - Writing device with out dust - Google Patents

Abstract

The utility model discloses an improved writing device without powder dust, which is composed of a writing board, a special writing pen and an eraser. The utility model is characterized in that a layer of transparent protective film which is convenient to replace is glued on the surface of the writing board, and after abraded, the transparent protective film can be replaced. Thereby, the service life of the writing board is prolonged. The special writing pen which is improved can be used for writing on a blackboard. Strokes have suitable thickness. The contact of the pin roller surface of the improved eraser and the surface of the writing board is good. The stress is homogeneous. The wiping effect is identical with the wiping effect of an ordinary eraser which is used for wiping handwriting on an ordinary blackboard. The improved writing device without powder dust is disclosed by the utility model, can not consume chalks when used, and fundamentally eliminates the defect of powder dust pollution. A minitype improved writing device without powder dust can be used as a calculating board for students. A large size improved writing device without powder dust can be used for partially replacing a traditional blackboard.

Description

Writing device with out dust

The utility model belongs to the writing device technical field.

The writing device of being made up of blackboard, chalk and blackboard eraser commonly used has the shortcoming of dust pollution.In order to overcome this shortcoming, many researchers have proposed multiple no dust writing device scheme.The writing of magnetic writing board (CN85109739, CN88212574.5 etc.) is clear inadequately, and is difficult to local clear the wiping.The writing of Blackboard with a layer of fluid (CN87212100) can not keep lastingly.Dustless and wearless writing-board (CN87108209) adopts paste coating, has solved the lasting reservation problem of writing.But, experiment showed, that it has following shortcoming: 1. be attached to transparent membrane wearing and tearing or the transparency reduction easily in use above the paste coating layer, the service life of having limited clipboard; 2. the round bead shape nib of special writing pen can only form a thinner road, can not satisfy the requirement of general writing on the blackboard; 3. the blackboard eraser roller surface is difficult to form good the contact with clipboard plate face, causes and wipes quite difficulty of writing clearly.

The purpose of this utility model promptly is to overcome above-mentioned difficulties, proposes a kind of improved no dust writing device.

Above-mentioned purpose of the present utility model is to realize by the architecture advances to clipboard, special writing pen and blackboard eraser:

1. on the clipboard surface, stick on one deck protective film (Fig. 1, Fig. 2).This film is only simply pasted in its edge, is convenient to change.The tip of the brushstyle of a writing or painting directly contacts with diaphragm with the blackboard eraser roller in the use, in wearing and tearing or transparency when not good, and replaceable new diaphragm, thus prolonged overall service life of clipboard.On diaphragm, can print various light color (for example light red) ruling or printed words, for writing reference or depicting.

2. make the circular or annular smooth end face (Fig. 3,4) that a diameter equates with a writing on the blackboard commonly used road thickness approximately at the written front end of special writing pen.Make this end face lower platen face when writing and, can form the suitable road of thickness along the slip of plate face.In order to write conveniently, also can make nib with respect to angle of penholder lateral bending (for example 45 °).

3. add a tubulose elastic outer layer (Fig. 5,6) in the outside of blackboard eraser roller.So, the rigid element at roller middle part guarantees to be difficult in the roller work producing flexural deformation, and elastic outer layer then can make roller have suitable radial deformation, thereby makes roller surface contact well with the plate face, and is stressed even, wipes effect clearly and obviously improves.

Structure of the present utility model is provided by the following examples and accompanying drawing.

Fig. 1,2 is the clipboard structure chart.［ 1 ］ be base plate, it is the skeleton and the support of clipboard, requires surfacing, and is not yielding; ［ 2 ］ be liner, its back side sticks on the surface of base plate ［ 1 ］, requires smooth surface smooth; ［ 3 ］ for to be filmed, its back side sticks on the liner ［ 2 ］, and its color is the writing color, requires smooth surface smooth, selects the white plastic film among the embodiment for use; ［ 4 ］ be dope layer, be coated in uniformly on filmed ［ 3 ］, require the strong covering power of coating, obvious with the aberration of being filmed, select black paste matter among the embodiment for use; ［ 5 ］ be transparent membrane, require transparency good, quality is pliable and tough, and its back side is attached on the dope layer ［ 4 ］, and the edge is pasted together with ［ 3 ］ edge of being filmed, and does not cause coating to spill; ［ 6 ］ be diaphragm, require transparency good, quality is pliable and tough, and the edge sticks on the edge of transparent membrane ［ 5 ］ simply, can take off replacing after the wearing and tearing.In addition, the formation of the remainder (flexible portion) except that base plate ［ 1 ］ nature a kind of independently consumable products---write veneer, be convenient to existing frosted glass blackboard is transformed.Write and be convenient to change after veneer damages.

Fig. 3,4 is a special writing structure chart.［ 7 ］ be nib, its front end has a smooth circular end surface, and diameter equates with a road thickness approximately; ［ 8 ］ be penholder.Penholder is approximately vertical with the plate face when writing, and written end face lower platen face and along the slip of plate face can form writing.

Fig. 5,6 is the blackboard eraser structure chart.［ 9 ］ be roller middle part rigid element; ［ 10 ］ be the roller elastic outer layer; ［ 11 ］ be handle.Using method and ordinary blackboard eraser are similar.Press down from the grip and promote blackboard eraser, can wipe writing along the plate face.For simply, also can be made into single roller blackboard eraser.

Experiment shows, the writing device after the improvement, and can obviously prolong its service life; Can write out a suitable writing on the blackboard of road thickness; Generally speaking, blackboard eraser comes and goes and promotes once, can wipe the writing that roller rolls across the position.

This writing device does not consume chalk in using, and has fundamentally solved the problem of dust pollution, and it is wet that writing is not water funk.Can form large, medium and small type series of products, the small-sized calculation board that can be used as the student; Large and medium-sizedly can partly replace traditional blackboard.

Claims (4)

1, a kind of utilization coating and be coated with the aberration between the surface and form the writing device of writing slidably is made up of clipboard, special writing pen and blackboard eraser, is characterized in having sticked on the surface of clipboard the transparent protective film that one deck is convenient to change [6].

2,, it is characterized in that on described protective film, being printed on for the light ruling (Fig. 1) of writing reference or for depicting the light printed words of usefulness according to the described writing device of claim 1.

3, according to the described writing device of claim 1, the written front end that it is characterized in that described special writing pen have one with a circular end surface that the road thickness adapts ［ 7 ］.

4,, it is characterized in that the roller of described blackboard eraser has a tubulose elastic outer layer ［ 10 ］ according to the described writing device of claim 1.