CN215321674U

CN215321674U - Novel compasses

Info

Publication number: CN215321674U
Application number: CN202121236791.XU
Authority: CN
Inventors: 舒斌; 崔爱华
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-03
Filing date: 2021-06-03
Publication date: 2021-12-28
Anticipated expiration: 2031-06-03

Abstract

The utility model discloses a novel compasses, which belongs to the technical field of teaching tools and comprises a hollow magnet, a 360-degree protractor, a dividing ruler fixer, a telescopic dividing ruler and a chalk fixer, wherein the 360-degree protractor is bonded with the outer wall of the hollow magnet, the dividing ruler fixer can be rotatably arranged at the circle center of the hollow magnet, one end of the dividing ruler fixer extends to the outer part of the hollow magnet, the telescopic dividing ruler is arranged at one end of the dividing ruler fixer extending to the outer part of the hollow magnet, the chalk fixer is arranged at the head end of the telescopic dividing ruler, and the circle center of the chalk fixer is aligned with 0 scale mark of the telescopic dividing ruler The measuring process becomes simple, and students can easily understand knowledge and actual operation.

Description

Novel compasses

Technical Field

The utility model relates to the technical field of teaching aids, in particular to a novel compass.

Background

The compasses are used for drawing circles or strings in mathematics and drawing, and are commonly used for drawing by a ruler and a compass.

The existing teaching compasses are single in function, can only draw circles or strings on a blackboard, cannot accurately draw circles, angles, fan-shaped, draw straight lines, measure length and direction, measure angles and the like, do not have a multifunctional drawing effect, and are not convenient for teaching and use.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a novel compass, which solves the problems that in the prior art, circles, angles, fan shapes, straight lines, length, direction measurement, angle measurement and the like cannot be accurately drawn, a multifunctional drawing effect is not provided, and teaching and use are inconvenient.

The utility model provides a novel compasses, which comprises a hollow magnet, a 360-degree protractor, a dividing ruler fixer, a telescopic dividing ruler and a chalk fixer, wherein the 360-degree protractor is bonded with the outer wall of the hollow magnet, the dividing ruler fixer can be rotatably installed at the circle center of the hollow magnet, one end of the dividing ruler fixer extends to the outside of the hollow magnet, the telescopic dividing ruler is installed at one end of the dividing ruler fixer extending to the outside of the hollow magnet, the chalk fixer is installed at the head end of the telescopic dividing ruler, and the circle center of the chalk fixer is aligned with 0 scale mark of the telescopic dividing ruler.

Preferably, the retractable graduated scale is provided with a standard line, and two ends of the standard line respectively correspond to the circle center of the hollow magnet and the circle center of the chalk holder.

Preferably, the 360-degree protractor is provided with four direction mark points which are arranged around the circle center of the 360-degree protractor at equal intervals, and the four direction mark points form 90-degree included angles between every two direction mark points.

Preferably, the 360-degree protractor and the telescopic graduated scale are both made of transparent plastic materials.

Preferably, the telescopic graduated scale is provided with length graduation lines.

Preferably, the 360-degree protractor is provided with angle scale marks.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model puts the hollow magnet on the blackboard, the center of the hollow magnet is aligned with the center of the circle to be drawn, then the telescopic graduated scale is pulled out to the length of the radius of the circle to be drawn, then the magnet is pressed by the left hand, the chalk in the chalk holder is rotated by the right hand for one circle, the circle is drawn on the blackboard by the chalk, the hollow magnet is put on the blackboard, the center of the hollow magnet is aligned with the o point of the sector to be drawn, then the length of the sector to be drawn is drawn by the telescopic graduated scale, then the magnet is pressed by the left hand, the chalk holder is rotated to the required angle by the right hand, the chalk in the chalk holder draws an arc on the blackboard, then the telescopic graduated scale is used for drawing two radii to form a sector, the drawing angle is similar to the drawing sector, the measuring angle is similar to the drawing angle, and the measuring angle can be conveniently, rapidly and accurately measured in length and direction, angle measurement etc. has multi-functional drawing effect, can make more complicated drawing, measurement process become simple, easily student understands knowledge and actual operation.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a front view of the present invention;

FIG. 2 is a schematic perspective view of the present invention;

fig. 3 is a partial perspective view of the present invention.

Reference numerals: a hollow magnet 1; a 360 ° protractor 2; a scale holder 3; a retractable scale 4; a chalk holder 5; a standard line 6; direction punctuation 7; length scale lines 8; angle scale lines 9.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention.

The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model.

All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 3, an embodiment of the present invention provides a novel compass, which includes a hollow magnet 1, a 360 ° protractor 2, a scale holder 3, a retractable scale 4, and a chalk holder 5, wherein the 360 ° protractor 2 is bonded to an outer wall of the hollow magnet 1, the scale holder 3 is rotatably mounted at a center of the hollow magnet 1, one end of the scale holder 3 extends to an outside of the hollow magnet 1, the retractable scale 4 is mounted at an end of the scale holder 3 extending to the outside of the hollow magnet 1, the chalk holder 5 is mounted at a head end of the retractable scale 4, and a center of the chalk holder 5 is aligned with a 0 scale line of the retractable scale 4; the method comprises the steps of placing a hollow magnet 1 on a blackboard, aligning the center of the hollow magnet 1 with the center of a circle to be drawn, then pulling out the length of the radius of the circle to be drawn by a telescopic graduated scale 4, pressing the magnet by a left hand, rotating a chalk holder 5 by a right hand for one circle, drawing the circle on the blackboard by the chalk in the chalk holder 5, placing the hollow magnet 1 on the blackboard, aligning the center of the hollow magnet 1 with the o point of the circle to be drawn in a fan shape, pulling out the length of the radius of the circle to be drawn by the telescopic graduated scale 4, pressing the magnet by the left hand, rotating the chalk holder 5 to a required angle by the right hand, drawing an arc on the blackboard by the chalk in the chalk holder 5, drawing two radii to form the fan shape by the telescopic graduated scale 4, drawing an angle similar to the drawing fan shape, measuring the angle similar to the drawing angle, and drawing a straight line conveniently, quickly and accurately, The length and direction measurement, the angle measurement and the like are measured, the multifunctional drawing function is realized, the complicated drawing and measuring process can be simplified, the students can easily understand knowledge and actual operation, and the practicability is high.

Specifically, the retractable graduated scale 4 is provided with a standard line 6, and two ends of the standard line 6 respectively correspond to the circle center of the hollow magnet 1 and the circle center of the chalk holder 5; the standard line 6 facilitates manual reading of the angle of rotation of the chalk in the chalk holder 5.

Specifically, the 360-degree protractor 2 is provided with four direction marking points 7 which are arranged around the circle center at equal intervals, and the four direction marking points 7 form 90-degree included angles between every two direction marking points; the four directional punctuation 7 facilitates a clear reading of the direction during drawing.

Specifically, the 360-degree protractor 2 and the telescopic graduated scale 4 are both made of transparent plastic materials; the length and the angle can be conveniently read manually, and the situation that the telescopic graduated scale 4 shields the part of the 360-degree protractor 2 and cannot read the length and the angle is avoided.

Specifically, the length scale marks 8 are arranged on the telescopic graduated scale 4; the length scale marks 8 facilitate manual quick and accurate reading of length data.

Specifically, the 360-degree protractor 2 is provided with angle scale lines 9; the angle scale lines 9 facilitate manual, rapid and accurate reading of angle data.

The working principle of the utility model is as follows: the method comprises the steps of placing a hollow magnet 1 on a blackboard, aligning the center of the hollow magnet 1 with the center of a circle to be drawn, then pulling out the length of the radius of the circle to be drawn by a telescopic graduated scale 4, pressing the magnet by a left hand, rotating a chalk holder 5 by a right hand for one circle, drawing the circle on the blackboard by the chalk in the chalk holder 5, placing the hollow magnet 1 on the blackboard, aligning the center of the hollow magnet 1 with the o point of the circle to be drawn in a fan shape, pulling out the length of the radius of the circle to be drawn by the telescopic graduated scale 4, pressing the magnet by the left hand, rotating the chalk holder 5 to a required angle by the right hand, drawing an arc on the blackboard by the chalk in the chalk holder 5, drawing two radii to form the fan shape by the telescopic graduated scale 4, drawing an angle similar to the drawing fan shape, measuring the angle similar to the drawing angle, and drawing a straight line conveniently, quickly and accurately, Measuring length and direction, measuring angle, etc. and has the functions of drawing, simplifying the drawing and measuring process and facilitating the understanding of students on knowledge and actual operation.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A novel compasses is characterized in that: including hollow magnet (1), 360 protractor (2), scale fixer (3), scalable scale (4) and chalk fixer (5), 360 protractor (2) bond with the outer wall of hollow magnet (1), scale fixer (3) can rotate the centre of a circle department of installing at hollow magnet (1) to the one end of scale fixer (3) extends to the outside of hollow magnet (1), install on scale fixer (3) extend to the outside one end of hollow magnet (1) scalable scale (4), the head end at scalable scale (4) is installed in chalk fixer (5), the centre of a circle of chalk fixer (5) aligns with 0 scale mark of scalable scale (4).

2. The novel compass of claim 1, wherein: and the retractable graduated scale (4) is provided with a standard line (6), and two ends of the standard line (6) respectively correspond to the circle center of the hollow magnet (1) and the circle center of the chalk holder (5).

3. The novel compass of claim 1, wherein: the 360-degree protractor (2) is provided with four direction mark points (7) which are arranged around the circle center at equal intervals, and the four direction mark points (7) form 90-degree included angles between every two direction mark points.

4. The novel compass of claim 1, wherein: the 360-degree protractor (2) and the telescopic graduated scale (4) are both made of transparent plastic materials.

5. The novel compass of claim 1, wherein: the telescopic graduated scale (4) is provided with length graduated lines (8).

6. The novel compass of claim 1, wherein: and angle scale marks (9) are arranged on the 360-degree protractor (2).