CN205167984U - Ruler convenient to draw angular bisector - Google Patents

Abstract

The utility model discloses a ruler convenient to draw angular bisector, including first ruler unit and second ruler unit, the one end of first ruler unit and the one end of second ruler unit are articulated, first spout has been seted up on the surface of first ruler unit, first spout is parallel with the blade direction of first ruler unit, the second spout has been seted up on the surface of second ruler unit, the second spout is parallel with the blade direction of second ruler unit, be provided with first rotatory draw runner in the first spout, be provided with the rotatory draw runner of second in the second spout, the length of first rotatory draw runner is the same with the length of the rotatory draw runner of second. The utility model provides an enough ruler convenient to draw angular bisector.

Description

A Straightedge Convenient for Drawing Angle Bisectors

technical field

The utility model relates to a measuring tool, in particular to a straightedge for drawing angle bisectors.

Background technique

A ruler is a common measuring tool in daily life. It is often used for distance measurement or drawing, and is widely used in mathematics, surveying, engineering and other fields.

At present, the rulers on the market have relatively simple structures. A general ruler is a long rectangular shape, and scales are arranged on the edge of its surface, which is more convenient for specific use. But these traditional straightedges only have the function of the straightedge itself and do not have additional functions. It can only play the role of depicting lines, and its function is relatively single, which cannot meet the various needs in actual situations.

Especially sometimes there is only a straightedge at hand, but it is necessary to measure the bisector of the angle, which is very troublesome. According to the traditional drawing method, you need to find the same distance on both sides of the angle, then make a vertical line, and then connect the focal point with the vertex of the angle. But in real life, this vertical line is not easy to draw when there is only a ruler. Some people will say that the edge of the ruler is a right angle, but after the ruler has been used for a long time, its edge will wear out and become uneven. The resulting angle bisector is not accurate.

Utility model content

Aiming at the deficiencies in the prior art, the purpose of this utility model is to provide a straightedge that can be used for drawing angle bisectors.

In order to achieve the above object, the utility model provides the following technical proposal: a straightedge for drawing angle bisectors, comprising a first ruler unit and a second ruler unit, one end of the first ruler unit and the second ruler unit One end of the ruler unit is hinged, the surface of the first ruler unit is provided with a first chute, the first chute is parallel to the direction of the ruler body of the first ruler unit, and the surface of the second ruler unit is A second chute is provided, and the second chute is parallel to the direction of the ruler of the second ruler unit. The first chute is provided with a first rotating slide bar, and the second chute is provided with a second chute. Two rotary sliders, the length of the first rotary slider is the same as that of the second rotary slider.

The utility model is further set as follows: the cross sections of the first chute and the second chute are all set as I-shaped, the bases of the first rotary slide bar and the second rotary slide bar are circular bases, and the bases The section is also I-shaped.

The utility model is further configured as follows: the top ends of the first rotary slide bar and the second rotary slide bar are provided with magnets.

By adopting the above technical solution, under normal conditions, the straightedge itself can be played. When drawing an angle bisector, just align the first chute and the second chute with the two sides of the angle. After alignment, move the first rotary slider and the second rotary slider to compare the scale on the surface of the ruler , when the distance from the first rotary slider to the hinge is the same as that of the second rotary slider to the hinge, and the ends of the first rotary slider and the second rotary slider touch each other away from the base, at this time, use the tip of the pen to Make a mark where the first rotary slider and the second rotary slider touch, and connect this point with the origin of the required bisected angle. In this way, the angle bisector of this angle can be easily made.

Description of drawings

Fig. 1 is the structural diagram of the utility model ruler;

Fig. 2 is a cross-sectional view of the joint between the ruler chute and the rotary slide bar of the utility model.

In the figure: 1. The first ruler unit; 11. The first rotary slider; 12. The magnet; 2. The second ruler unit; 21. The second rotary slider; 3. The first chute; 4. The second chute; 5, scale.

detailed description

Referring to Fig. 1 to Fig. 2, a kind of straightedge embodiment of the utility model that is convenient for drawing angle bisectors will be further described.

A kind of straightedge that is convenient to draw angle bisector as shown in Fig. 1 and Fig. 2, comprises and comprises the first straightedge unit 1 and the second straightedge unit 2, here the first straightedge unit 1 and the second straightedge unit 2 have the same length, and are all set in a flat cuboid shape, and scales 5 are all set on their surface edges. In this embodiment, the right end of the first ruler unit 1 and the left end of the second ruler unit 2 are hinged, so that the first support unit and the second ruler unit 2 can freely rotate. In this embodiment, the surface of the first ruler unit 1 is further provided with a first chute 3, where the first chute 3 is parallel to the direction of the ruler body of the first ruler unit 1; The surface of the unit 2 is also provided with a second chute 4 , and the second chute 4 is parallel to the direction of the blade of the second ruler unit 2 . The first rotary slide bar 11 is arranged in the first chute 3, the second rotary slide bar 21 is arranged in the second chute 4, and the length of the first rotary slide bar 11 and the length of the second rotary slide bar 21 same, and set their shapes to be arrows. Magnets 12 are arranged at the sharp corners of the arrows, which can more conveniently touch and fix the first rotating slide bar 11 and the second rotating slide bar 21 together. Moreover, in this embodiment, both the first chute 3 and the second chute 4 are set as I-shaped chute, and the bases of the first rotary slide bar 11 and the second rotary slide bar 21 are both set in a circular shape, And set its section as I-shape. In this way, the two can be well matched to facilitate the rotation and sliding of the first rotating bar and the second rotating bar in the first chute 3 or the second chute 4 .

When it is necessary to draw an angle bisector in specific use, it is only necessary to align the first chute 3 and the second chute 4 with the two sides of the angle, and after alignment, move the first rotary slide bar 11 and the second rotary slide bar 21, Comparing the scale 5 on the surface of the ruler, when the distance between the first rotary slide bar 11 and the second rotary slide bar 21 is the same as the distance from the hinge, and the first rotary slide bar 11 and the second rotary slide bar 21 are far away from the base One end touches each other, at this moment, make a mark with the nib at the place that the first rotary slide bar 11 and the second rotary slide bar 21 touch, and connect this point with the origin of the required bisected angle. In this way, the angle bisector of this angle can be easily made.

The above is the preferred embodiment of the utility model, and those skilled in the art can make some modifications and improvements without departing from the principle of the utility model, and these should also be regarded as the protection scope of the utility model.

Claims (3)

1. be convenient to the ruler of picture angular bisector for one kind, it is characterized in that: comprise the first ruler unit and the second ruler unit, one end of described first ruler unit and one end of the second ruler unit hinged, the surface of described first ruler unit offers the first chute, described first chute is parallel with the blade direction of the first ruler unit, the surface of described second ruler unit offers the second chute, described second chute is parallel with the blade direction of the second ruler unit, the first rotation draw runner is provided with in described first chute, the second rotation draw runner is provided with in described second chute, the length that described first length and second rotating draw runner rotates draw runner is identical.

2. ruler according to claim 1, is characterized in that: the cross section of described first chute and the second chute is all set to I shape, and the described first base rotating draw runner and the second rotation draw runner is cup dolly, and the cross section of its base is also I shape.

3. ruler according to claim 2, is characterized in that: the described first top rotating draw runner and the second rotation draw runner is provided with magnet.