CN201240180Y

CN201240180Y - Magnetic attraction mute blackboard drawing set square

Info

Publication number: CN201240180Y
Application number: CNU2008201902845U
Authority: CN
Inventors: 陈文琪
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-08-18
Filing date: 2008-08-18
Publication date: 2009-05-20
Anticipated expiration: 2018-08-18

Abstract

The utility model relates to a blackboard teaching charting tool, in particular to a magnetic absorption mute type blackboard charting set square. The magnetic absorption mute type blackboard charting set square mainly solves the problem that when a teacher uses the set square for charting, the slip and the collision with a blackboard are easily caused, thereby generating noise. The magnetic absorption mute type blackboard charting set square comprises the set square, bar magnets and a rubber layer, and the magnetic absorption mute type blackboard charting set square is characterized in that the bar magnets are respectively embedded at the middle parts of three sides of the set square, the thickness of the bar magnets is the same with that of the set square, and the rubber layer coats the surface of the set square. When in charting by the teacher, the set square can be absorbed on the blackboard; when the teacher needs a plurality of set squares for contrast charting, the teacher does not need to spend efforts to press each set square; and the magnetic absorption mute type blackboard charting set square has the advantages of simple structure, convenient operation and convenient use.

Description

Magnetic squelch type blackboard mapping set square

Technical field

The utility model relates to a kind of black board teaching apparatus, specifically a kind of magnetic squelch type blackboard mapping set square that can help teacher's convenient picture on blackboard.

Background technology

At present, known black board teaching mapping is with having 30 degree, 45 degree set squares, normally heavy greatly and very, be not easy to operation of teacher, when especially the teacher mapped to gesticulating parallel lines with two set squares simultaneously, set square very easily slided with blackboard, causes picture inaccurate, and constantly produce impact noise between set square and the blackboard, influenced the peace and quiet of teaching environment.

Summary of the invention

The purpose of this utility model provides a kind of magnetic squelch type blackboard simple in structure, easy to use, swift to operate mapping set square, to solve the noise problem that above-mentioned teacher uses mapping set square and blackboard easily to slide and produce.

The utility model is achieved in that magnetic squelch type blackboard mapping set square, comprise set square, bar magnet and rubber layer, it is characterized in that: middle part on three limits of set square, embed bar magnet respectively, and the thickness of bar magnet is identical with the thickness of set square, rubber layer is wrapped on surface at set square, promptly constitutes the utility model.

The beneficial effects of the utility model are: the very little pressure that only needs to give by human body just can be adsorbed on the blackboard securely, and in the time will using two set squares to draw parallel lines simultaneously, one of them triangle board foot tool can be adsorbed on the blackboard and need not the people and go to pin, the teacher can easily contrast with another set square and make various figures, owing between absorption type blackboard mapping set square and the blackboard rubber layer is arranged, can prevent effectively that set square from skidding and the noise of the operation that reduces to draw.

Description of drawings

Fig. 1 is the utility model 30 degree set square structural representations.

Fig. 2 is the utility model 45 degree set square structural representations.

Fig. 3 is the I-I cutaway view of Fig. 1.

In the accompanying drawing: 1, set square, 2, bar magnet, 3, rubber layer.

The specific embodiment

Further specify the utility model embodiment below in conjunction with drawings and Examples.

Embodiment: as Fig. 1, shown in Figure 3, middle part on three limits that have common wooden set square 1 now, dig out rectangular emptying aperture respectively, bar magnet 2 is embedded respectively in three limits of set square, and the thickness of bar magnet is identical with the thickness of set square, rubber layer is wrapped on surface at set square, promptly constitutes the utility model.

During use, magnetic squelch type mapping set square one need only be pasted on the blackboard gently, can be like a cork map with chalk setting-out on the triangle edges of boards.

Claims

1. magnetic squelch type blackboard mapping set square, comprise set square, bar magnet and rubber layer, it is characterized in that: the middle part on three limits of set square embeds bar magnet respectively, and the thickness of bar magnet is identical with the thickness of set square, wraps rubber layer on the surface of set square.