CN211251991U - Portable mathematical education plotter - Google Patents

Abstract

The utility model discloses a portable mathematical education plotter relates to mathematical education auxiliary assembly technical field, including the arc piece, the inboard of arc piece is provided with the arc recess, the upper end inboard of arc piece is provided with the locating hole, the inner wall of locating hole rotates and is connected with the dabber, the outside of dabber is provided with the connecting block, the upper end of connecting block is provided with the ruler, the lower surface of connecting block is provided with the instruction arrow point, the inboard of arc piece is provided with peeps the board, the outside of peeping the board is provided with the angle sign. Compared with the prior art, the beneficial effects of the utility model are that: the contained angle can be constituteed to the side of ruler and the upper surface of circular arc piece, can assist and carry out the drawing of angle, and can carry out the measurement of angle, has the multifunctionality, has replaced the function of ruler and protractor, need take multiple drawing tool when having avoided the mr to attend a class, makes things convenient for the mr to use and demonstrates.

Description

Portable mathematical education plotter

Technical Field

The utility model relates to a mathematical education auxiliary assembly technical field specifically is a portable mathematical education plotter.

Background

In the learning process of geometry, in order to help students to better understand teaching contents, teachers can draw graphs on a blackboard in the teaching process so as to facilitate the explanation of the teachers. In the process of drawing the angle, a teacher needs to use the protractor and the ruler to mutually cooperate to draw the angle, the operation is complex, and various measuring tools are inconvenient to carry.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a portable mathematical education plotter to the solution is carrying out the drawing in-process of angle, and the mr need use protractor and ruler to mutually support and carry out the drawing of angle, operates comparatively loaded down with trivial details, and multiple measuring tool carries comparatively inconvenient problem.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a portable mathematical education plotter, includes the circular arc piece, the inboard of circular arc piece is provided with the arc recess, the upper end inboard of circular arc piece is provided with the locating hole, the inner wall of locating hole rotates and is connected with the dabber, the outside of dabber is provided with the connecting block, the upper end of connecting block is provided with the ruler, the lower surface of connecting block is provided with the instruction arrow point, the inboard of circular arc piece is provided with peeps the board, the outside of peeping the board is provided with the angle sign.

Preferably, the back of the ruler and the back of the arc block are in the same plane, and the arc block, the positioning hole and the peeping plate are in the same axis.

Preferably, the peeping plate is made of a transparent acrylic plate, and the outer diameter of the peeping plate is not larger than the inner diameter of the arc-shaped groove.

Preferably, the front center line of the straight ruler is concentric with the front center line of the connecting block, and the indication arrow is arranged right below the connecting block.

Preferably, the center line of the front surface of the indication arrow is concentric with the center line of the front surface of the connecting block, and the lowest end of the indication arrow is not lower than the lowest point of the peeping plate.

Compared with the prior art, the beneficial effects of the utility model are that: this portable mathematical education plotter: the angle through rotatory ruler can change, contained angle between ruler and the circular arc board, when carrying out the angle drawing, the contained angle can be constituteed to the side of ruler and the upper surface of circular arc piece, can adjust out suitable angle as required, and can carry out the measurement of angle, and has the multifunctionality, and it is comparatively convenient to use, the function of ruler and protractor has been replaced, need take multiple drawing tool when having avoided the mr to go on class, make things convenient for the mr to use and demonstrate, and is easy to operate, and the convenience is carried when the teacher teaches.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is an overall perspective view of the present invention.

In the figure: 10. an arc block; 11. an arc-shaped groove; 12. positioning holes; 13. a mandrel; 14. connecting blocks; 15. a straightedge; 16. an arrow is indicated; 17. a peep plate; 18. and (5) identifying an angle.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: a portable drawing device for mathematical education comprises an arc block 10, an arc groove 11 is arranged on the inner side of the arc block 10, a positioning hole 12 is arranged on the inner side of the upper end of the arc block 10, a mandrel 13 is rotatably connected to the inner wall of the positioning hole 12, the mandrel 13 can rotate in the positioning hole 12, a connecting block 14 is arranged on the outer side of the mandrel 13, the mandrel 13 can drive the angle of the connecting block 14 to change when rotating, a ruler 15 is arranged on the upper end of the connecting block 14, when the angle of the connecting block 14 changes, the angle of the ruler 15 can be driven to change, the included angle between the side surface of the ruler 15 and the upper surface of the arc block 10 changes, an indicating arrow 16 is arranged on the lower surface of the connecting block 14, the indicating arrow 16 can change along with the angle of the connecting block 14, a peeping plate 17 is arranged on the inner side of the arc block 10, and, the angle mark 18 is arranged on the outer side of the peeping plate 17, the angle mark 18 is consistent with that of the existing protractor, and the angle of the straight ruler 15 can be treated by watching the position of the indicating arrow 16 corresponding to the angle mark 18.

The back of ruler 15 and the back of circular arc piece 10 are in the coplanar for the two can both paste on the blackboard, keep parallel with the blackboard, and circular arc piece 10, locating hole 12 and board 17 three are in same axle center are peered to make ruler 15 and instruction arrow 16 can use locating hole 12 to carry out the change of angle as the centre of a circle, and the regulation of angle is more accurate, guarantees to peered board 17 and can observe the position of instruction arrow 16 all the time.

The transparent acrylic plate is selected as the material of the peeping plate 17, the outer diameter of the peeping plate 17 is not larger than the inner diameter of the arc-shaped groove 11, the visibility of the visual field is guaranteed by the transparent acrylic plate, and the peeping plate 17 cannot exceed the range of the arc-shaped groove 11.

The positive central line of ruler 15 is concentric with the positive central line of connecting block 14, indicate arrow 16 to set up under connecting block 14, indicate arrow 16 positive central line and connecting block 14 positive central line concentric, ruler 15, connecting block 14 and indication arrow 16 are in concentric vertical axial, make the change of angle more clear and more visual, more accurate reduce with actual error, the lowermost end of indication arrow 16 is not less than the minimum of peeping board 17, guarantee that indication arrow 16 is in peeping board 17's within range all the time, guarantee to observe the position and the angle that indication arrow 16 corresponds angle sign 18 constantly.

The utility model discloses when concrete implementation: when the angle drawing tool is used, if the drawing of the angle is needed, firstly, the angle between the ruler 15 and the arc block 10 is changed according to the needed angle, if the angle between the ruler 15 and the arc block 10 needs to be reduced, firstly, the ruler 15 is rotated clockwise, the connecting block 14 is driven to change the angle, the ruler 15 and the connecting block can change the angle by taking the positioning hole 12 as the center of a circle, so that the included angle between the angle of the ruler 15 and the upper surface of the arc block 10 can be changed, the indication arrow 16 can change the angle along with the connecting block 14, the current included angle can be known by checking the numerical values corresponding to the indication arrow 16 and the angle mark 18, after the included angle is proper, the drawing is respectively carried out along the side surface of the ruler 15 and the upper surface of the arc block 10 by using a chalk, two straight lines can be obtained, the drawing of the angle is further completed, when the angle measurement is carried out, the drawing needs to, the angle of the straight edge 15 is changed to be consistent with the other edge of the angle to be measured, and the current included angle can be known through the numerical values corresponding to the indication arrow 16 and the angle mark 18.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. A portable plotter for mathematical education, comprising an arc block (10), characterized in that: the inboard of arc piece (10) is provided with arc recess (11), the upper end inboard of arc piece (10) is provided with locating hole (12), the inner wall of locating hole (12) rotates and is connected with dabber (13), the outside of dabber (13) is provided with connecting block (14), the upper end of connecting block (14) is provided with ruler (15), the lower surface of connecting block (14) is provided with indication arrow point (16), the inboard of arc piece (10) is provided with peeps board (17), the outside of peeping board (17) is provided with angle sign (18).

2. A portable mathematical education plotter as claimed in claim 1, wherein: the back of the ruler (15) and the back of the arc block (10) are in the same plane, and the arc block (10), the positioning hole (12) and the peeping plate (17) are in the same axis.

3. A portable mathematical education plotter as claimed in claim 1, wherein: the material of peeping plate (17) selects transparent acrylic plate, peeping plate (17)'s external diameter is not more than the internal diameter of arc recess (11).

4. A portable mathematical education plotter as claimed in claim 1, wherein: the front center line of the straight ruler (15) is concentric with the front center line of the connecting block (14), and the indication arrow (16) is arranged right below the connecting block (14).

5. A portable mathematical education plotter as claimed in claim 1, wherein: the center line of the front surface of the indication arrow (16) is concentric with the center line of the front surface of the connecting block (14), and the lowest end of the indication arrow (16) is not lower than the lowest point of the peeping plate (17).

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