CN201895506U - Improvement of right-angle set square - Google Patents

Abstract

The utility model relates to a right-angle triangular plate capable of drawing arbitrary angles, preventing wear of scales, and avoiding harm to users. It is to add an angle drawer on the hypotenuse of the right-angle triangle. The angle drawer is composed of a plastic ruler and a small protractor. One side of the plastic ruler has a sliding plastic rod and a guide rail to draw the angle conveniently and accurately. Under the right-angle triangle A layer of transparent glue is pasted on the surface to prevent the engraved lines from being worn. The three corners of the right-angled triangle are made into arcs to avoid harm to the user. These three corners are made inside the right-angled triangle for easy use.

Description

Transformation of Right Angle Triangle

technical field

The utility model is a right-angled triangular plate which prevents scale wear and can conveniently draw arbitrary angles, and is especially convenient for students to use.

Background technique

The current right-angled triangle draws scales on its lower surface, but this will wear the scales during use, which will cause inconvenience to users. The protractor has a single function, is inconvenient to carry, and drawing angles is very troublesome. The user causes damage, and the 90-degree right angle is easily worn, making the drawn right angle inaccurate.

Contents of the invention

The purpose of the utility model is to provide a multifunctional, convenient, durable, cheap and safe right-angled triangular plate.

The technical scheme that the utility model solves its technical problem adopts is:

Dig a similar triangle with a slightly smaller size inside the right-angled triangle, round the three outer corners of the triangle, draw three straight lines parallel to a right-angled side, and paste a thin layer of transparent glue on the lower surface of the right-angled triangle where the scale is drawn. Make a corner marker on the hypotenuse that can draw any angle. The corner marker is composed of a small protractor on the hypotenuse and a rectangular plastic ruler fixed at the center of the semicircular protractor. The bottom side of the plastic ruler is made track.

Description of drawings

Fig. 1 is the structural representation of a right-angled triangular plate;

Fig. 2 is the sectional view of Fig. 1 hypotenuse angler;

Fig. 3 is a schematic diagram of the use of the angler;

Figure 4 is a schematic diagram of preventing scale wear.

Detailed ways

See Figure 1, the three corners of the right-angled triangular plate are made into 30-degree rounded corners 1, 90-degree rounded corners 5, and 60-degree rounded corners 7, but in use, these special corners of 30 degrees, 60 degrees, and 90 degrees are used more frequently. Therefore, the functions of 30-degree fillet 1, 90-degree fillet 5, and 60-degree fillet 7 can be replaced by internal angles of 30-degree angle 2, 90-degree angle 4, and 60-degree angle 8. Draw a scale line on the lower surface of the right-angled side 3 of the right-angled triangular plate and stick a layer of transparent glue on the entire lower surface, see Figure 4 for details. The three parallel lines 6 perpendicular to the right angle side 3 can be used to draw a right angle conveniently and quickly. When drawing a right angle, choose one of the three parallel lines to coincide with the known right angle side, and then draw another right angle along the right angle side 3 side. Fixing bolt 9, plastic ruler 10 is fixed on the right-angled triangle when the angler is not used. The engraved line 11 of the protractor is drawn on the upper surface of the right-angled triangle and a layer of transparent glue is pasted on it to prevent the scale from being worn.

Referring to Fig. 2, 12 is connected with 13, 14 to form guide rail 15, and sliding plastic rod 16 can move in guide rail 15, and the equal length of guide rail 15 and sliding plastic rod 16 is half of the length of plastic ruler 10 in Fig. 1, slides when not in use. Plastic rod 16 is sleeved in guide rail 15, as shown in Figure 1, see Figure 3 when using.

See Fig. 3, when using the protractor, remove the fixing bolt 9 in Fig. 1, remove the sliding plastic rod 16 in Fig. 2, move the plastic ruler 10 to find the corresponding scale on the protractor line, and put The sliding plastic bar 16 in the middle is enclosed within on the guide rail 15, at this moment, the guide rail 15 on the plastic ruler 10 can touch on drawing paper, is convenient to draw angle, can draw corresponding angle at 17 places according to the principle that the same position angle is equal.

Referring to Fig. 4, a layer of transparent glue is pasted on the lower surface 18 of the right-angled triangular plate to prevent the scale from being worn.

Claims (3)

1. right angle triangle that has angle drawing device, the hypotenuse that it is characterized in that set square has angle drawing device, this angle drawing device is made up of protractor, the ruler that has guide rail and a slip plastic bar, the lower surface of set square has the thin layer that prevents the scale wearing and tearing, the exterior angle (1,5 of set square, 7) make fillet, make 30 degree angles (2) in set square inside, an angle of 90 degrees (4), 60 degree angles (8).

2. right angle triangle according to claim 1 is characterized in that the set square lower surface prevents that the thin layer of scale wearing and tearing from being layer of transparent glue.

3. right angle triangle according to claim 1 is characterized in that the angle drawing device of set square hypotenuse can be drawn arbitrarily angled.

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