CN201936491U

CN201936491U - Demonstration drawing board used for mathematic teaching

Info

Publication number: CN201936491U
Application number: CN201020665186XU
Authority: CN
Inventors: 董延亮; 朱亚萍
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-12-08
Filing date: 2010-12-08
Publication date: 2011-08-17
Anticipated expiration: 2020-12-08

Abstract

The utility model discloses a demonstration drawing board used for mathematic teaching, the demonstration drawing board is characterized by comprising a base board, a positioning nail and an elastic string; positing holes are arranged on the base board in a dot matrix way, and the four edges of the base board are marked with scales; the positioning nail can be inserted into the positing hole firmly; the two ends of the elastic string are provided with rope loops which can be sheathed on the positioning nail. Compared with the prior art, the demonstration drawing board can perform drawing in the teaching without various drawing instruments, the time and labor are saved, and the demonstration drawing board can also be used for demonstrating the graph structure relation.

Description

Mathematical education is with demonstrating drawing board

[technical field]

The utility model relates to a kind of teaching aid, particularly a kind ofly is used for the demonstration drawing board that mathematical education is used.

[background technology]

Often need to carry out the demonstration of a large amount of geometric constructions or coordinate system in the mathematical education, mostly present demonstration mode is that teacher free-hand drawing geometric figures or coordinate system on blackboard impart knowledge to students, and there is following defective in this method: 1. teacher's instrument that need match is such as ruler, set square etc.; 2. the teacher needs to be grasped certain drawing instrument and controls technical ability; 3. draw and taken many time in classroom, cause the minimizing of actual hours of instruction, can bring adverse effect teaching efficiency; 4. teaching is bigger with the drawing instrument stock size, and need lift for a long time and map, and teacher's physical efficiency is had certain demand, wastes time and energy.In addition, present writing on the blackboard mapping system is revised a line and is tended to destroy whole figure, brings inconvenience.

[utility model content]

Technical assignment of the present utility model is at above the deficiencies in the prior art, provides a kind of mathematical education with the demonstration drawing board, can break away from present multiple drawing instrument and impart knowledge to students with drawing, and is time saving and energy saving, and can be used for the Presentation Graphics structural relation.

The technical scheme in the invention for solving the technical problem is: a kind of mathematical education is characterized in that: comprise substrate, locating pin and stretch cord with the demonstration drawing board; Dot matrix is arranged with pilot hole on the described substrate, and substrate four limits are marked with scale; Described locating pin can be firm be inserted in the pilot hole; There is fake at described stretch cord two ends, and fake can be inserted on the locating pin.

Above-mentioned substrate and locating pin are black.

Above-mentioned stretch cord has multiple length and multiple color.

Above-mentioned substrate lower frame is provided with two chambers, puts locating pin and stretch cord respectively.

Compared with prior art, the utlity model has following characteristics:

1, can carry out the structure of multiple geometric figure and coordinate system, break away from multiple drawing instrument;

2, draw fast, time saving and energy saving;

3, can carry out the analysis of figure and coordinate system broken line graph etc., the hack lines.

[description of drawings]

Fig. 1 is a structural representation of the present utility model.

[embodiment]

Below in conjunction with specification drawings and specific embodiments the utility model is further specified.

As shown in Figure 1, the utility model comprises substrate 1, locating pin 2 and stretch cord 3.Described substrate 1 and locating pin 2 are black.

Dot matrix is arranged with pilot hole 4 on the described substrate 1, and substrate 1 four limits are marked with scale, and is less because of scale, fails among Fig. 1 to show in detail.Described substrate 1 lower frame is provided with chamber 1 and chamber 26, puts locating pin 2 and stretch cord 3 respectively.

Described locating pin 2 can be firm be inserted in the pilot hole 4.

There is fake at described stretch cord 3 two ends, and fake can be inserted on the locating pin 2.Less because of fake, fail among Fig. 1 to show in detail.Described stretch cord 3 has multiple length and multiple color, in order to represent different lines and graphics relationship.

Make up rectangle as needs, at first respectively locating pin 2 is inserted in the corresponding positioning hole 4 as requested, because pilot hole 4 is spaced apart 1cm, so both can know between points distance without ruler.Determined four points of rectangle, stretch cord 3 is carried out the connection of these four points, connected mode is according to the interval of locating pin 2.If squareness ratio is less, an end fake can be inserted on the locating pin 2, walk around its excess-three locating pin 2 then, the last other end returns and is set to initial locating pin 2.If squareness ratio is bigger, select the stretch cord 3 of a suitable length between can per two locating pins 2.After structure finishes, carry out other demonstrations if desired,, just can demonstrate, in conversion, understand the mutual relationship of each figure, conversion process and character with the stretch cord 3 of other colors such as distortion or cutting.

Make up coordinate system as needs, at first respectively locating pin 2 is selected O point, directions X, Y direction, become X-axis with stretch cord 3 connection O points, directions X then, become Y-axis with stretch cord 3 connection O points, Y direction.According to substrate 1 scale measuring point on coordinate system, perhaps be linked to be broken line graph and demonstrate.

Need to prove; particular of the present utility model is described in detail the utility model; for a person skilled in the art, in the various conspicuous change of under the situation that does not deviate from spirit and scope of the present utility model it being carried out all within protection domain of the present utility model.

Claims

1. a mathematical education is shown drawing board with the shore, it is characterized in that: comprise substrate, locating pin and stretch cord; Dot matrix is arranged with pilot hole on the described substrate, and substrate four limits are marked with scale; Described locating pin can be firm be inserted in the pilot hole; There is fake at described stretch cord two ends, and fake can be inserted on the locating pin.

2. mathematical education according to claim 1 is characterized in that with the demonstration drawing board described stretch cord has multiple length and multiple color.

3. mathematical education according to claim 1 is characterized in that with the demonstration drawing board described substrate lower frame is provided with two chambers, puts locating pin and stretch cord respectively.