CN204567047U

CN204567047U - Setting-out blackboard eraser

Info

Publication number: CN204567047U
Application number: CN201520128555.4U
Authority: CN
Inventors: 李志鹏
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-03-03
Filing date: 2015-03-03
Publication date: 2015-08-19
Anticipated expiration: 2025-03-03

Abstract

The utility model discloses a kind of setting-out blackboard eraser, relate to teaching equipment field, evenly be provided with four chalk holes between the upper plate of this setting-out blackboard eraser and lower shoe, chalk hole is the cone cylinder body shape blind hole of inner wide and outer narrow, and chalk can be stuck in chalk hole by user, coordinate ruler once can draw four straight lines on blackboard simultaneously, improve the efficiency of setting-out, the top of upper plate is provided with wiper simultaneously, and wiper is manufactured by sponge, there is the function of wiping chalk trace, convenient and practical.

Description

Setting-out blackboard eraser

Technical field

The utility model relates to teaching equipment field, particularly a kind of setting-out blackboard eraser.

Background technology

Blackboard eraser is usually central for imparting knowledge to students, and is used for wiping the instrument of chalk trace on blackboard, and in the middle of traditional teaching, blackboard eraser is absolutely necessary educational aid.

The most simplicity of design of existing blackboard eraser, just wraps up wiper with iron sheet, and only has the function of wiping chalk trace, and in teaching process, often need setting-out when writing English or Chinese character, and more time-consuming with the picture of ruler rule on blackboard.

Utility model content

Technical problem to be solved in the utility model is to provide a kind of setting-out blackboard eraser, by designing the chalk hole of four even cloth, and cannot the defect of quick line drawing to solve in prior art.

For achieving the above object, the utility model provides following technical scheme: a kind of setting-out blackboard eraser, it is characterized in that: described setting-out blackboard eraser comprises the equal cuboid upper plate of two sizes and lower shoe, the top of upper plate is provided with wiper, wiper is manufactured by sponge, wiper by nylon line suture on upper plate, the side, long limit of upper plate and lower shoe is by two chain connections, the long limit opposite side of upper plate and lower shoe is provided with pair of magnetic make-up, magnetic make-up is manufactured by magnetic steel disc, and the magnetic pole that contacts with each other is heteropole magnetic pole, four chalk holes are evenly provided with between upper plate and lower shoe, chalk hole is the cone cylinder body shape blind hole of inner wide and outer narrow.

Preferably, described upper plate and lower shoe are by hard PVC manufacture.

Preferably, the spacing in described adjacent two chalk holes is greater than 5cm.

Preferably, the tapering in described chalk hole is 10 °.

The beneficial effect of above technical scheme is adopted to be: between the upper plate of this setting-out blackboard eraser and lower shoe, to be evenly provided with four chalk holes, chalk hole is the cone cylinder body shape blind hole of inner wide and outer narrow, chalk can be stuck in chalk hole by user, coordinate ruler once can draw four straight lines on blackboard simultaneously, improve the efficiency of setting-out, the top of upper plate is provided with wiper simultaneously, and wiper is manufactured by sponge, there is the function of wiping chalk trace, convenient and practical.

Accompanying drawing explanation

Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in further detail.

Fig. 1 is the structural representation of a kind of setting-out blackboard eraser of the utility model;

Fig. 2 is the expansion schematic diagram of a kind of setting-out blackboard eraser of the utility model.

Wherein, 1-lower shoe, 2-upper plate, 3-chalk hole, 4-wiper, 5-magnetic make-up, 6-hinge.

Detailed description of the invention

The preferred embodiment of a kind of setting-out blackboard eraser of the utility model is described in detail below in conjunction with accompanying drawing.

Fig. 1 and Fig. 2 shows the detailed description of the invention of a kind of setting-out blackboard eraser of the utility model: this setting-out blackboard eraser, it is characterized in that: described setting-out blackboard eraser comprises the equal cuboid upper plate 2 of two sizes and lower shoe 1, the top of upper plate 2 is provided with wiper 4, wiper 4 is manufactured by sponge, wiper 4 by nylon line suture on upper plate 2, there is the function of wiping chalk trace, convenient and practical.

Upper plate 2 is connected by two hinges 6 with the side, long limit of lower shoe 1, the long limit opposite side of upper plate 2 and lower shoe 1 is provided with pair of magnetic make-up 5, magnetic make-up 5 is manufactured by magnetic steel disc, and the magnetic pole that contacts with each other is heteropole magnetic pole, open with close all convenient, four chalk holes 3 are evenly provided with between upper plate 2 and lower shoe 1, chalk hole 3 is the cone cylinder body shape blind hole of inner wide and outer narrow, chalk can be stuck in chalk hole 3 by user, coordinate ruler once can draw four straight lines on blackboard simultaneously, improve the efficiency of setting-out, also the quantity of line chalk arbitrarily can be adjusted according to actual conditions.

Composition graphs 1 and Fig. 2, upper plate 2 and lower shoe 1 are by hard PVC manufacture, low cost, economical and practical, the spacing in adjacent two chalk holes 3 is greater than 5cm, be applicable to the size of letter written with chalk, can arbitrarily setting-out anyhow, the tapering in chalk hole 3 is 10 °, is the tapering of most of chalk, Absorbable organic halogens blocks chalk, and setting-out is effective.

Above is only preferred embodiment of the present utility model; it should be pointed out that for the person of ordinary skill of the art, under the prerequisite not departing from the utility model creation design; can also make some distortion and improvement, these all belong to protection domain of the present utility model.

Claims

1. a setting-out blackboard eraser, it is characterized in that: described setting-out blackboard eraser comprises the equal cuboid upper plate of two sizes and lower shoe, the top of upper plate is provided with wiper, wiper is manufactured by sponge, wiper by nylon line suture on upper plate, the side, long limit of upper plate and lower shoe is by two chain connections, the long limit opposite side of upper plate and lower shoe is provided with pair of magnetic make-up, magnetic make-up is manufactured by magnetic steel disc, and the magnetic pole that contacts with each other is heteropole magnetic pole, four chalk holes are evenly provided with between upper plate and lower shoe, chalk hole is the cone cylinder body shape blind hole of inner wide and outer narrow.

2. setting-out blackboard eraser according to claim 1, is characterized in that: described upper plate and lower shoe are by hard PVC manufacture.

3. setting-out blackboard eraser according to claim 1, is characterized in that: the spacing in described adjacent two chalk holes is greater than 5cm.

4. setting-out blackboard eraser according to claim 1, is characterized in that: the tapering in described chalk hole is 10 °.