CN205439709U - Mathematical teaching rule - Google Patents

Abstract

The utility model discloses a mathematical teaching rule, it contains drawing rule body (1), and bevel protractor (2) are outwards extended to the one end of this drawing rule body (1), bevel protractor (2) whole semicircular hollow out construction that is, bevel protractor (2) and drawing rule body (1) between be provided with and draw pole (3), the one end that should draw pole (3) is passed through hinge (15) and drawing rule body (1) rotation and is connected the cooperation, the other end of drawing rule body (1) is provided with drawing circle chi. The utility model discloses simple structure, convenient to use need not be with the help of angulation chi point -device angle of can drawing up in painting angle degree or measurement angle degree, the great drawing error that has reduced, and also need not be with the help of compasses when drawing the circle, direct on drawing the circle chi circle that can draw up, the great has shortened the time of drawing, has improved classroom efficiency.

Description

a math teaching ruler

technical field

The utility model relates to the technical field of teaching appliances, in particular to a math teaching ruler.

Background technique

Most of the existing mathematics teaching drawing rulers are split structures, which are very inconvenient to use and troublesome to store, especially when drawing or measuring angles, you need to use a protractor to draw, and you need to use compasses when drawing circles To draw, not only the drawing time is longer, which greatly reduces the efficiency of the classroom, but also there will be certain errors in the drawn geometric figure.

Utility model content

The purpose of the utility model is to provide a math teaching ruler, which can effectively solve the problems existing in the background technology.

In order to solve the problems existing in the background technology, it includes a drawing ruler body 1, and one end of the drawing ruler body 1 extends outwards from an angle ruler 2, and the angle ruler 2 is a semicircular hollow structure as a whole. A drawing rod 3 is arranged between the angle ruler 2 and the drawing ruler body 1, and one end of the drawing rod 3 is connected and rotatably connected with the drawing ruler body 1 by a hinge shaft 15, and the other end of the drawing ruler body 1 is provided with a circle ruler, The described round ruler is composed of the first circular plate 4, the second circular plate 5, the third circular plate 6 and the fourth circular plate 7 which are sequentially socketed, and the first circular plate 4 and the second circular plate 5, the rotational connection and cooperation between the second circular plate 5 and the third circular plate 6, the rotational connection and cooperation between the third circular plate 6 and the fourth circular plate 7, and the rotational connection and cooperation between the second circular plate 5 and the third circular plate 6. A circle of bosses 8 extend outwards from the circumference of the first circular plate 4, the second circular plate 5, the third circular plate 6 and the fourth circular plate 7. The first circular plate 4 and the second circular plate 5 are , the third circular plate 6 and the fourth circular plate 7 are respectively provided with holes 9 for chalk insertion, and a parallel ruler 10 is provided near the middle part of the drawing ruler body 1, and a parallel ruler 10 is provided on the parallel ruler 10 to fit its movement. Positioning slide seat 11, described positioning slide seat 11 is provided with the positioning seat 12 that slides with its clearance fit, and this positioning seat 12 is provided with the screw knob 13 that is screwed with it, and the end of this screw knob 13 and parallel ruler 10 Close contact.

Both sides of the bottom of the parallel ruler 10 are provided with grooves 14 inwards.

The edges of the drawing ruler body 1, the angle ruler 2 and the circle ruler are respectively provided with scales.

Due to the adoption of the above technical solutions, the utility model has the following beneficial effects: simple structure, easy to use, very accurate angles can be drawn without using a protractor when drawing or measuring angles, greatly reducing drawing errors , and you don’t need to use compasses when drawing a circle, you can draw a circle directly with one stroke on the drawing ruler, which greatly shortens the drawing time and improves the classroom efficiency.

Description of drawings

In order to illustrate the utility model more clearly, the embodiments will be briefly introduced below in conjunction with the accompanying drawings.

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of drawing round ruler part in the utility model;

Fig. 3 is a structural schematic diagram of the parallel ruler part in the utility model.

detailed description

In order to make the technical means, creative features, goals and effects achieved by the utility model easy to understand, the technical solutions in the utility model embodiment will be clearly and completely described below in conjunction with the accompanying drawings in the utility model embodiment.

Referring to Fig. 1-3, this specific embodiment is realized by adopting the following technical scheme, which includes a drawing ruler body 1, and one end of the drawing ruler body 1 extends outwards an angle ruler 2, and the angle ruler 2 is a semicircle as a whole Shaped hollow structure, a drawing rod 3 is arranged between the angle ruler 2 and the drawing ruler body 1, and one end of the drawing rod 3 is rotatably connected with the drawing ruler body 1 through a hinge shaft 15, and the drawing ruler body 1 The other end is provided with a circle-drawing ruler, and the circle-drawing ruler is composed of the first circular plate 4, the second circular plate 5, the third circular plate 6 and the fourth circular plate 7 which are sequentially socketed. Rotational connection and cooperation between the circular plate 4 and the second circular plate 5, rotational connection and cooperation between the second circular plate 5 and the third circular plate 6, the connection between the third circular plate 6 and the fourth circular plate 7 Rotational connection and cooperation between the first circular plate 4, the second circular plate 5, the third circular plate 6 and the fourth circular plate 7 respectively extend outward a circle of bosses 8, the first circular plate Plate 4, the second circular plate 5, the third circular plate 6 and the fourth circular plate 7 are respectively provided with holes 9 for chalk insertion, and a parallel ruler 10 is provided near the middle part of the drawing rule body 1, and the parallel ruler 10 There is a positioning slide 11 that fits its movement. The positioning slide 11 is provided with a positioning seat 12 that slides and fits with its clearance. The end of 13 is in close contact with parallel ruler 10.

Both sides of the bottom of the parallel ruler 10 are provided with grooves 14 inwards.

The edges of the drawing ruler body 1, the angle ruler 2 and the circle ruler are respectively provided with scales.

Due to the adoption of the above technical solutions, the utility model has the following beneficial effects: simple structure, easy to use, very accurate angles can be drawn without using a protractor when drawing or measuring angles, greatly reducing drawing errors , and you don’t need to use compasses when drawing a circle, you can draw a circle directly with one stroke on the drawing ruler, which greatly shortens the drawing time and improves the classroom efficiency.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it It is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit of the technical solutions of the various embodiments of the present invention. and range.

Claims (3)

1. A math teaching ruler is characterized in that it comprises a drawing ruler body (1), and an end of the drawing ruler body (1) extends outwards an angle ruler (2), and the angle ruler (2) is a half as a whole Circular hollow structure, a drawing rod (3) is arranged between the described angle ruler (2) and the drawing ruler body (1), and one end of the drawing rod (3) is connected to the drawing ruler body ( 1) Rotate and connect and cooperate, the other end of described drawing ruler body (1) is provided with draw circle ruler, and described draw circle ruler is made of the first circular plate (4), the second circular plate (5), the third circle The plate (6) and the fourth circular plate (7) are sequentially socketed, the first circular plate (4) and the second circular plate (5) are rotated and connected, and the second circular plate ( 5) Rotate connection and cooperation with the third circular plate (6), rotation connection and cooperation between the third circular plate (6) and the fourth circular plate (7), the first circular plate (4), The circumference of the second disc (5), the third disc (6) and the fourth disc (7) respectively extend a circle of bosses (8), the first disc (4), The second circular plate (5), the third circular plate (6) and the fourth circular plate (7) are respectively provided with holes (9) for inserting chalk, and near the middle part of the drawing ruler body (1) are provided with parallel Ruler (10), the parallel ruler (10) is provided with a positioning slide (11) that fits its movement, and the positioning slide (11) is provided with a positioning seat (12) that slides and fits with its clearance. The seat (12) is provided with a screw knob (13) screwed and matched with it, and the end of the screw knob (13) is in close contact with the parallel ruler (10). 2. A math teaching ruler according to claim 1, characterized in that grooves (14) are provided on both sides of the bottom of the parallel ruler (10). 3. A kind of math teaching ruler according to claim 1, characterized in that the edges of the drawing ruler body (1), the angle ruler (2) and the circle ruler are respectively provided with scales.