CN211641616U - Teaching ruler capable of fixing chalk - Google Patents

Abstract

The utility model provides a teaching ruler capable of fixing chalks, which comprises an auxiliary ruler, a connecting shaft, a fixed cylinder, a shaft, a main ruler and a connecting wire; the auxiliary ruler is rotatably arranged at the right end of the main ruler through a connecting shaft, a shaft is arranged at the left end of the main ruler, the connecting wire is wound on the shaft, and a fixing barrel for fixing chalk is fixedly arranged at the tail end of the connecting wire. The beneficial effects of the utility model are that convenient to carry, convenient to use is swift, changes the explanation problem. The straight ruler is simple, the auxiliary ruler is additionally arranged at the right end of the straight ruler and used for drawing a longer straight line, and the connecting line is additionally arranged at the left end of the straight ruler and used for drawing a circle or an arc.

Description

Teaching ruler capable of fixing chalk

Technical Field

The utility model belongs to the technical field of the instrument of drawing, especially, relate to a can fix chi of giving lessons of chalk.

Background

The drawing geometry course is a course which is necessary to be repaired by all the industrial and scientific professions, the ruler drawing is a basic part of the drawing geometry course, manual drawing lays a foundation for using software drawing in the future, teachers need to carry more than two drawing tools in class, burden is added to the teachers, the problems can be solved, and the teaching ruler capable of fixing the chalk and effectively reducing the burden of the teachers is still needed to be further researched and developed while the drawing effect is not influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a simple structure, easy operation, convenient to use are swift, and the chi of giving lessons of fixing the chalk of convenient to popularize and apply is particularly suitable for the teacher to give lessons and uses.

The technical scheme of the utility model is that: the utility model relates to a teaching ruler capable of fixing chalks, which comprises an auxiliary ruler, a connecting shaft, a fixed cylinder, a shaft, a main ruler and a connecting wire;

the auxiliary ruler is rotatably arranged at the right end of the main ruler through a connecting shaft, a shaft is arranged at the left end of the main ruler, the connecting wire is wound on the shaft, and a fixing barrel for fixing chalk is fixedly arranged at the tail end of the connecting wire;

the fixed cylinder comprises a cylinder wall and three arc-shaped elastic pieces fixed on the inner wall of the cylinder wall, and two ends of each arc-shaped elastic piece are fixed on the inner wall of the cylinder wall.

The three arc-shaped elastic pieces have the same size and are uniformly distributed on the inner wall of the cylinder wall.

The length and the width of the auxiliary ruler and the main ruler are the same.

The utility model has the advantages and positive effects that:

1. due to the adoption of the technical scheme, the teaching drawing is more convenient; has the advantages of simple structure, low processing cost, convenient popularization and application, and the like.

2. The drawing operation of different length straight lines, different radian circular arcs and different angle angles can be completed, and the functions are diversified.

3. Small volume and space saving.

4. The chalk can be fixed in the fixed cylinder by the arc elastic piece in the fixed cylinder, and when the length of connecting wire is changed, the chalk can be well fixed in the fixed cylinder, and at the in-process of giving lessons, need not to put down the chalk, change connecting wire length back, pick up the chalk again for the process of giving lessons labour saving and time saving more.

Drawings

Fig. 1 is a schematic view of a folding structure of a main ruler and an auxiliary ruler.

Fig. 2 is a schematic vertical structure diagram of the main ruler and the auxiliary ruler.

Fig. 3 is a schematic view of the structure in which the sub-scale and the connecting line are pulled out.

Fig. 4 is a sectional view of the fixed barrel.

In the figure:

1-auxiliary ruler, 2-connecting shaft, 3-fixed cylinder, 4-shaft, 5-main ruler and 6-connecting line.

3-1-cylinder wall, 3-2-arc elastic sheet, 3-3-chalk

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1-3, the teaching ruler capable of fixing chalks of the present invention comprises an auxiliary ruler 1, a connecting shaft 2, a fixing cylinder 3, a shaft 4, a main ruler 5 and a connecting line 6;

the auxiliary ruler 1 is rotatably arranged at the right end of the main ruler 5 through a connecting shaft 2, a shaft 4 is arranged at the left end of the main ruler 5, the connecting wire 6 is wound on the shaft 4, and a fixing barrel 3 for fixing chalk is fixedly arranged at the tail end of the connecting wire.

The fixing cylinder 3 comprises a cylinder wall 3-1 and three arc-shaped elastic pieces 3-2 fixed on the inner wall of the cylinder wall 3-1, two ends of each arc-shaped elastic piece are fixed on the inner wall of the cylinder wall 3-1, protruding points of the three arc-shaped elastic pieces 3-2 form a chalk 3-3-chalk clamping point, the chalk can be effectively positioned by three-point fixing, and the chalk with different thicknesses can be fixed by the elastic performance of the arc-shaped elastic pieces 3-2, so that the chalk fixing cylinder is wide in application range.

The three arc-shaped elastic pieces 3-2 are the same in size and are uniformly distributed on the inner wall of the cylinder wall 3-1.

The length and the width of the auxiliary ruler 1 and the main ruler 5 are the same.

The working process of the example is as follows:

compared with the traditional ruler for teaching, the ruler is more convenient to carry and simple to operate, and the auxiliary ruler 1 is additionally arranged at the right end of the main ruler 5 and can be used for drawing a longer straight line. When the ruler is used, if the length of the main ruler 5 is not enough, the auxiliary ruler 1 can be pulled out to draw the required length, and when the vertical drawing is needed, the auxiliary ruler 1 is fixed at 90 degrees.

When a circle or an arc is made, the connecting wire 6 wound on the shaft 4 is pulled out (a certain length is pulled out as required, the surplus is wound on the shaft 4 and is not moved), the chalk is inserted into the fixed cylinder 3, and then a circle or an arc with the left end around the shaft 4 as the center of a circle and the length of the self-taking line as the radius can be made.

When the chalk is inserted into the fixed cylinder 3, the chalk is well fixed in the fixed cylinder 3 and can not be separated, so that the teaching time is saved.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.

Claims (1)

1. The utility model provides a can fix chi of giving lessons of chalk which characterized in that: comprises an auxiliary ruler, a connecting shaft, a fixed cylinder, a shaft, a main ruler and a connecting line;

the auxiliary ruler is rotatably arranged at the right end of the main ruler through a connecting shaft, a shaft is arranged at the left end of the main ruler, the connecting wire is wound on the shaft, and a fixing barrel for fixing chalk is fixedly arranged at the tail end of the connecting wire;

the fixed cylinder comprises a cylinder wall and three arc-shaped elastic pieces fixed on the inner wall of the cylinder wall, two ends of each arc-shaped elastic piece are fixed on the inner wall of the cylinder wall, protruding points of the three arc-shaped elastic pieces form a chalk clamping point, and the three points are fixed;

the three arc-shaped elastic pieces have the same size and are uniformly distributed on the inner wall of the cylinder wall;

the length and the width of the auxiliary ruler and the main ruler are the same.

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