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

Abstract

The utility model discloses a right-angle set square which can draw any angle, prevent the abrasion of scales and prevent users from being harmed, wherein an angle-drawing device is additionally arranged on the bevel edge of the right-angle set square. The angle-drawing device consists of a plastic ruler and a small protractor. A plastic sliding rod and a lead rail are installed at the one side of the plastic ruler, and angles can be easily and accurately drawn. The lower surface of the right-angle set square is pasted with a layer of scotch tape to prevent the abrasion of the scales. The three corners of the right-angle set square are designed to be arc-shaped to prevent the users from being harmed, and the three corners are made in the right-angle set square to facilitate the use.

Description

The transformation of right angle triangle

Technical field

The utility model is a kind of scale wearing and tearing, right angle triangle at any angle that can conveniently draw of preventing, especially makes things convenient for the student to use.

Background technology

Present right angle triangle is drawn scale at its lower surface, but scale like this can in use wear and tear, make troubles to the user, the protractor function singleness, carry inconvenience, and draw angle and extremely bother, the too sharp meeting in right angle triangle the top of the horn place damages the user, and 90 degree places, right angle easily are worn and make the right angle that draws inaccurate.

Summary of the invention

The purpose of this utility model is to provide a multi-functional, convenient, durable, cheap, safe right angle triangle.

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

Dig the similar triangles that size is slightly little at the right angle trigonometry intralamellar part, fillet is made at three exterior angles of set square, be parallel to a right-angle side and draw three straight lines, the lower surface of drawing scale at right angle triangle pastes the very thin transparent adhesive tape of one deck, on hypotenuse, do the angle drawing device that to draw any angle, this angle drawing device is made up of a little protractor on the hypotenuse and a fixing rectangle plastics chi of semicircle protractor circle centre position, and a side-lower of plastic ruler is made track.

Description of drawings

Fig. 1 is the structural representation of right angle triangle;

Fig. 2 is the cutaway view of Fig. 1 hypotenuse angle drawing device;

Fig. 3 is that angle drawing device uses schematic diagram;

Fig. 4 prevents scale wearing and tearing schematic diagram.

The specific embodiment

Referring to Fig. 1,30 degree fillets, 1,90 degree fillet, 5,60 degree fillets 7 are made at three angles of right angle triangle respectively, but in use 30 spend, 60 degree, 90 these special angle frequencies of utilization of degree are bigger, therefore can spend angles 2 with inner corners 30, an angle of 90 degrees 4, the 8 corresponding effects that replace 30 degree fillets, 1,90 degree fillet, 5,60 degree fillets 7 of 60 degree angles.Draw graduation mark and be stained with layer of transparent glue at the lower surface of right angle triangle right-angle side 3, see Fig. 4 for details at whole lower surface.Three parallel lines 6 perpendicular to right-angle side 3 can be used for drawing easily and efficiently the right angle, and when drawing the right angle, optional one overlaps with known right-angle side from three parallel lines, then along right-angle side 3 another right-angle side that draws.Set bolt 9, the time spent is not fixed on plastic ruler 10 on the right angle triangle at angle drawing device.The groove 11 of protractor is drawn in the upper surface of right angle triangle and pastes layer of transparent glue in the above, prevents that scale is worn.

Referring to Fig. 2,12 and 13,14 are connected to form guide rail 15, and slip plastic bar 16 can move in guide rail 15, the equal in length of guide rail 15 and slip plastic bar 16 is half that plastic ruler 10 is grown among Fig. 1, time spent slip plastic bar 16 is not enclosed within the guide rail 15, as shown in Figure 1, sees Fig. 3 during use.

Referring to Fig. 3, when using angle drawing device, set bolt among Fig. 19 is taken off, slip plastic bar 16 among Fig. 2 takes off, and mobile plastic ruler 10 finds corresponding scale on the groove of protractor, and the slip plastic bar 16 among Fig. 2 is enclosed within on the guide rail 15, at this moment, guide rail 15 on the plastic ruler 10 can contact on the cartridge paper, is convenient to the picture angle, the principle that equates according to the corresponding angles corresponding angle of can drawing at 17 places.

Referring to Fig. 4, stick layer of transparent glue at right angle triangle lower surface 18, prevent that scale is 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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