CN206544415U - A middle school mathematics teaching drawing device - Google Patents

Abstract

The utility model discloses a middle school mathematics teaching drawing device, including main scale, protractor and vice chi, main scale one end is equipped with centre of a circle pilot pin, centre of a circle pilot pin one end is equipped with the sucking disc, the main scale surface is equipped with the scale mark, the main scale other end is equipped with the protractor, the protractor surface is equipped with vice chi, vice chi one end is equipped with the chalk clamp, chalk clamp one side is equipped with the fastening knob. The utility model discloses a scale mark that is equipped with on the main scale surface, the teacher can be accurate draw the straight line that needs length on the blackboard, through the protractor that is equipped with in main scale one end, the angle of reading out geometric figure that can be accurate, separate main scale and vice chi through the loose axle, alright with draw the circle on the blackboard, the teacher need not take more instruments before class, has reduced mr's working strength.

Description

A middle school mathematics teaching drawing device

【Technical field】

The utility model relates to a teaching appliance, in particular to a middle school mathematics teaching drawing device.

【Background technique】

At present, in the process of mathematics teaching, teachers often use teaching aids to draw on the black pole, especially in the process of geometric drawing demonstration, they will use teaching aids such as triangle ruler, compasses, protractor, etc. These teaching aids are scattered and difficult to draw. It needs to be replaced back and forth from time to time, which wastes valuable teaching time and greatly increases the workload of teachers. Moreover, so many teaching aids are placed on the platform at the same time, which takes up limited space, is not convenient for teaching aids, and is not clean enough. For this reason, we propose a kind of middle school mathematics teaching drawing device.

【Content of utility model】

The main purpose of the utility model is to provide a middle school mathematics teaching drawing device, which can effectively solve the problems in the background technology.

In order to achieve the above object, the technical scheme that the utility model takes is:

A drawing device for middle school mathematics teaching, comprising a main ruler, a protractor and an auxiliary ruler, one end of the main ruler is provided with a center pin, one end of the center pin is provided with a suction cup, the surface of the main ruler is provided with a scale line, the The other end of the main ruler is provided with a protractor, the surface of the protractor is provided with an auxiliary ruler, one end of the auxiliary ruler is provided with a chalk clip, and one side of the chalk clip is provided with a fastening knob.

Further, the protractor and the vice ruler are movably connected through a movable shaft.

Further, the chalk holder fastens the chalk through a fastening knob.

Compared with the prior art, the utility model has the following beneficial effects: the utility model can accurately draw a straight line with the required length on the blackboard through the scale line provided on the surface of the main ruler in the utility model; The advanced protractor can accurately read the angle of the geometric figure, separate the main ruler and the auxiliary ruler through the movable axis, and then draw a circle on the blackboard. The teacher does not need to bring more tools before class, which reduces the teacher's work. strength.

【Description of drawings】

Fig. 1 is the overall structure schematic diagram of a kind of middle school mathematics teaching drawing device of the utility model.

In the figure: 1. main ruler; 2. protractor; 3. auxiliary ruler; 4. chalk holder; 5. fastening knob;

【detailed description】

In order to make the technical means, creative features, goals and effects achieved by the utility model easy to understand, the utility model will be further elaborated below in conjunction with specific embodiments.

As shown in Figure 1, a kind of middle school mathematics teaching drawing device comprises main ruler 1, protractor 2 and auxiliary ruler 3, and described main ruler 1 end is provided with circle center positioning pin 8, and described circle center positioning pin 8 one end is provided with suction cup 9 , the surface of the main ruler 1 is provided with a scale line 7, the other end of the main ruler 1 is provided with a protractor 2, the surface of the protractor 2 is provided with an auxiliary ruler 3, and one end of the auxiliary ruler 3 is provided with a chalk holder 4, the One side of the chalk clip 4 is provided with a fastening knob 5 .

The utility model is a drawing device for middle school mathematics teaching. In the utility model, the teacher can accurately draw a straight line with a required length on the blackboard through the scale line provided on the surface of the main ruler. The protractor provided at one end of the main ruler can Accurately read the angle of the geometric figure, separate the main ruler and the auxiliary ruler through the movable axis, and then draw a circle on the blackboard. The teacher does not need to bring more tools before class, which reduces the teacher's work intensity.

Wherein, the protractor 2 and the vice ruler 3 are movably connected through a movable shaft 6 .

Wherein, the chalk holder 4 fastens the chalk through the fastening knob 5 so that the chalk will not fall.

It should be noted that the utility model is a drawing device for middle school mathematics teaching. When the teacher needs to draw a circle, he puts the chalk into the chalk clip 4, fastens the chalk clip 4 through the fastening knob 5, and then The movable shaft 6 adjusts the distance between the main ruler 1 and the auxiliary ruler 3, and then the suction cup 9 is fixed on the blackboard, and the circle drawing can be completed by rotating the auxiliary ruler 3.

The basic principles and main features of the present utility model and the advantages of the present utility model have been shown and described above. Those skilled in the industry should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model The new model also has various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (3)

1. a kind of middle-school mathematics teaching plotting unit, including main scale (1), protractor (2) and secondary ruler (3), it is characterised in that：It is described Main scale (1) one end is provided with center of circle pilot pin (8), and described center of circle pilot pin (8) one end is provided with sucker (9), main scale (1) surface Provided with graduation mark (7), main scale (1) other end is provided with protractor (2), and protractor (2) surface is provided with secondary ruler (3), institute Secondary ruler (3) one end is stated provided with chalk clamp (4), chalk clamp (4) side is provided with tightening knob (5).

2. a kind of middle-school mathematics teaching plotting unit according to claim 1, it is characterised in that：The protractor (2) and Secondary ruler (3) is flexibly connected by movable axis (6).

3. a kind of middle-school mathematics teaching plotting unit according to claim 1, it is characterised in that：The chalk clamp (4) is led to Cross tightening knob (5) fastening chalk.