CN201151302Y - Angular bisector plotting device - Google Patents

Abstract

An angular bisector plotting instrument is provided with a ruler; the middle of the ruler is provided with a transparent translot; four connection rods are hinged by pin rolls for forming a diamond framework the inner angle of which is adjustable; the pin roll of one hinged point of the diamond framework is fixed at the location at one end of the ruler corresponding to the translot; the lower end of the pin roll at the location of the top point on the cross is inserted in the translot of the ruler; the upper end of the pin roll is provided with a push-pull button. The ruler and the connection rods are transparent; the middle of the connection rod is provided with a straight reticle pointing to the center of the hinged point. The angular bisector or the perpendicular bisector of a segment can be drawn for once by only using the tool. The angular bisector plotting instrument not only can help teachers and students to draw picture accurately, but also simplifies the drawing steps; besides, a plurality of tools are not needed to be carried, thus being convenient and quick.

Description

The angular bisector plotter

Technical field:

The utility model relates to a kind of drawing tool, especially a kind of angular bisector plotter.

Background technology:

The angular bisector mapping is one of the modal mapping of imparting knowledge to students the junior middle school, in the proof or solution procedure of how much exercise questions, one accurately figure can help the student intuitively go up to form correct understanding to various quantitative relations and position relation, thereby help that they seek correctly, the thinking of simply solving a problem and solution approach, help them to deal with problems.And the angular bisector practice commonly used has two kinds of construction with ruler and compasses and meter algorithms, and there is error in the meter algorithm, and makes angular bisector and also will use protractor; The method of construction with ruler and compasses is accurate, but must use compasses, and two kinds of method mapping steps are all more.

Summary of the invention:

The purpose of this utility model provides a kind of angular bisector plotter, solves that the student is inaccurate when making angular bisector, step is loaded down with trivial details, need use the drawback of multiple drawing tool, help they accurately, mapping quickly and easily.

The purpose of this utility model realizes as follows: a ruler is arranged, and there is a penetrating translot centre of ruler; 4 connecting rods adjustable rhombus framework of the hinged formation interior angle of bearing pin is arranged, a pin joint bearing pin of rhombus framework is fixed on an end place of corresponding translot on the ruler, bearing pin lower end to the angular vertex place is inserted in the translot of ruler, there is a push-pull button its upper end, catches push-pull button to move this bearing pin is slided along translot.

Ruler and connecting rod are the transparent body, and there is the straight groove that points to the pin joint center centre of connecting rod to improve the indication degree of accuracy.

When drawing angular bisector, the bearing pin that is fixed on that end of ruler translot is fixed on the summit of known angle, the connecting rod of this bearing pin one side overlaps with the one side at angle, dragging push-pull button makes the connecting rod of opposite side overlap with the another side at angle, at this moment, the translot position is exactly the position of angular bisector, and directly setting-out gets final product in translot.Can also use its setting-out section perpendicular bisector in addition: respectively two free-ended bearing pins of rhombus framework are fixed on two end points places of known line segment, the translot position is the position of line segment perpendicular bisector just, and directly setting-out gets final product in translot.

The beneficial effects of the utility model are: it has utilized " diagonal of rhombus orthogonal divide equally and divide equally one group of diagonal angle " this character, only uses this a kind of instrument, once draws and just can make angular bisector or line segment perpendicular bisector.This instrument both can help Faculty and Students accurately to map, and had simplified the mapping step again, also need not carry multiple instrument, and was convenient and swift.

Description of drawings:

Accompanying drawing is the structural representation of the utility model angular bisector plotter.

The specific embodiment:

With reference to accompanying drawing, a ruler 5 is arranged, there is a penetrating translot 2 centre of ruler 5; The adjustable rhombus framework of 4 connecting rods, 3 usefulness bearing pins, 1 hinged formation interior angle is arranged, and a pin joint bearing pin 1 of rhombus framework is fixed on an end of corresponding translot 2 on the ruler 5, and bearing pin 1 lower end at angular vertex place is inserted in the translot 2 of ruler 5, and there is a push-pull button 4 its upper end.Ruler 5 and connecting rod 3 are the transparent body, and available transparent plastic or lucite are made, and there is the straight groove that points to the pin joint center centre of connecting rod 3.

Claims (2)

1, a kind of angular bisector plotter is characterized in that: a ruler (5) is arranged, and there is a penetrating translot (2) centre of ruler (5); 4 connecting rods (3) adjustable rhombus framework of the hinged formation interior angle of bearing pin (1) is arranged, a pin joint bearing pin (1) of rhombus framework is fixed on the end place that ruler (5) is gone up corresponding translot (2), bearing pin (1) lower end to the angular vertex place is inserted in the translot (2) of ruler (5), and there is a push-pull button (4) its upper end.

2, angular bisector plotter according to claim 1 is characterized in that: ruler (5) and connecting rod (3) are the transparent body.

Images