CN214295271U

CN214295271U - Set square convenient for coordinate point tracing

Info

Publication number: CN214295271U
Application number: CN202120092482.3U
Authority: CN
Inventors: 张守华; 周俨国; 郑丽霞; 杜文燕; 闫向洲
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-03
Filing date: 2021-01-03
Publication date: 2021-09-28
Anticipated expiration: 2031-01-03

Abstract

A set square convenient for tracing points in a coordinate system belongs to a drawing tool, and helps students to trace points in the coordinate system quickly, so that the operation time is saved. Scale lines are drawn at the edge of the bevel edge of the transparent triangular plate, grid lines perpendicular to the two right-angle sides are drawn on the triangular plate, and each grid line marks a continuous ordinal number at the edge of the right-angle side; forming holes at the intersection points of all the grid lines; drawing a right angle bisector of the triangular plate as an assistant line, and marking continuous ordinal numbers from a right angle vertex through a coordinate hole through which the triangle passes; the right-angle vertex is arranged at the origin of coordinates, two right-angle sides are superposed with coordinate axes, and then the coordinates of the whole point of which the horizontal and vertical coordinates of the quadrant where the set square is located are integers are positioned at the position of a coordinate hole, and the point can be quickly traced from the coordinate hole by using a pen point; (5, 4.2) such non-integer coordinates allow the drawing board to be shifted to the right by 0.2 unit length, where (5, 4) is (5, 4.2). The triangle ruler can be turned over to perform point tracing of each quadrant, and point tracing is faster by using the aid of the aid lines.

Description

Set square convenient for coordinate point tracing

Technical Field

The invention relates to a drawing tool for students, in particular to a set square convenient for tracing points in a coordinate system.

Background

The method comprises the steps of listing, tracing and connecting, drawing operation of mathematical learning in the whole middle school stage is performed, and the operation of tracing by using existing drawing tools such as a set square, a straight ruler and the like is time-consuming, labor-consuming, inaccurate, operation time-consuming and affects learning efficiency.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the set square is convenient for quick point tracing operation in a coordinate system, helps students to quickly trace points in the coordinate system, saves working time and improves learning efficiency.

In order to solve the problems, the technical scheme adopted by the invention is as follows: the utility model provides a set square convenient to coordinate is described point, includes the set square body, scale mark, its characterized in that: the set square comprises a set square body, scale marks, coordinate lines, coordinate holes and a position assisting line;

the triangular ruler body comprises a right-angled triangular transparent plate with an angle of 45 degrees and a right-angled triangular transparent plate with an angle of 30 degrees;

the scale marks are length scale marks which are drawn at the edge of the bevel edge of the upper triangular ruler body, and are displayed in an extending mode by taking 1 mm as a unit and multiplying 5 mm;

the coordinate lines are grid lines which are carved on the triangular ruler body and are respectively vertical to the two right-angle sides, the grid lines in the longitudinal direction and the transverse direction have common adjacent intervals, each grid line is marked with continuous ordinal numbers at the edges of the right-angle sides, and the continuous ordinal numbers in the longitudinal direction and the transverse direction all take a right-angle vertex as a common starting point and serve as a coordinate origin;

the coordinate holes are open holes at the intersection points of all grid lines;

the assistant line is a right-angle bisector which is described on the set square body, and the coordinate holes through which the assistant line passes are marked with continuous ordinal numbers from the right-angle vertex.

Preferably, the triangular rule body has a thickness of between 1 and 1.5 mm.

Preferably, the distance between two adjacent coordinate lines is 4 mm.

Preferably, the assist line is thickened as compared to the coordinate line.

Preferably, the diameter of the coordinate hole is between 1 mm and 1.5 mm.

The beneficial effects obtained by the invention are as follows:

establishing a rectangular coordinate by using the unit length of a coordinate line of the triangular ruler, placing a rectangular vertex at a coordinate origin, and enabling two rectangular sides to coincide with coordinate axes, so that an integer coordinate with integral coordinates of both horizontal and vertical coordinates of a quadrant in which the triangular ruler is located at a position of a coordinate hole, and quickly tracing points from the coordinate hole by using a pen point; if such non-integer point coordinates (5, 4.2) are present, the drawing board can be shifted to the right by 0.2 unit length (visual inspection), where the tracing point (5, 4) is (5, 4.2); other non-integral point coordinates are processed by the method, so that the point tracing speed can be greatly improved. The points of each quadrant can be traced by turning the triangular ruler.

The coordinate of the whole point can be determined more quickly by using the help line, for example, (7, 9), the triangle is placed in the first quadrant, 7 is found on the help line, the corresponding hole is (7, 7), and the second hole upwards is (7, 9); in other cases, the method is carried out, the non-integral point coordinates are combined with the previous method, so that the positioning is faster, the operation time can be effectively saved, and the learning efficiency is improved.

Drawings

FIG. 1 is a schematic diagram of the construction of the present invention implemented on a transparent triangular rule body having an angle of 45 °; in the figure, 1 is a scale mark, 2 is a coordinate line, 3 is a coordinate hole, and 4 is a position-aid line.

Detailed Description

The invention is further illustrated below with reference to an embodiment on a transparent triangular rule body comprising an angle of 45 °:

a transparent isosceles right-angle triangular plate with the thickness of 1 mm is used as a triangular ruler body, length scale lines are drawn on the bevel edge, 1 mm is taken as a unit, and the integral multiple of 5 mm is displayed in an extending mode; grid lines perpendicular to the two right-angle sides are drawn on the triangular plate, the adjacent intervals of the grid lines in the longitudinal direction and the transverse direction are all 4 mm, each grid line is marked with a continuous ordinal number at the edge of the right-angle side, and the continuous ordinal numbers in the transverse direction and the longitudinal direction all take a right-angle vertex as a common starting point and serve as a coordinate origin; forming holes at the intersection points of all the grid lines; the right angle bisector of the triangle is drawn as the assistant line, and the coordinate hole through which it passes is marked with continuous ordinal numbers from the right angle vertex.

A transparent right-angle triangular ruler with an angle of 30 degrees was manufactured in the same manner.

Those not described in detail in this specification are within the skill of the art.

Claims

1. The utility model provides a set square convenient to coordinate is described point, contains the set square body, scale mark, its characterized in that: comprises a set square body, scale marks, coordinate lines, coordinate holes and a position assisting line:

the coordinate lines are grid lines which are carved on the triangular ruler body and are respectively vertical to the two right-angle sides, the grid lines in the longitudinal direction and the transverse direction have common adjacent intervals, each grid line is marked with continuous ordinal numbers at the edges of the right-angle sides, and the continuous ordinal numbers in the transverse direction and the longitudinal direction all take a right-angle vertex as a common starting point and serve as a coordinate origin;

2. A set square for facilitating coordinate delineation of points as claimed in claim 1, wherein: the thickness of the triangular ruler body is between 1 millimeter and 1.5 millimeters.

3. A set square for facilitating coordinate delineation of points as claimed in claim 1, wherein: the spacing between two adjacent lines of the coordinate line is 4 mm.

4. A set square for facilitating coordinate delineation of points as claimed in claim 1, wherein: the assist line is thickened as compared with the coordinate line.

5. A set square for facilitating coordinate delineation of points as claimed in claim 1, wherein: the diameter of the coordinate hole is between 1 mm and 1.5 mm.