CN215850481U

CN215850481U - Multifunctional drawing teaching aid

Info

Publication number: CN215850481U
Application number: CN202121830099.XU
Authority: CN
Inventors: 李新华
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-06
Filing date: 2021-08-06
Publication date: 2022-02-18
Anticipated expiration: 2031-08-06

Abstract

The utility model provides a multifunctional drawing teaching aid, wherein a wavy slide way is arranged on the inner side of the hypotenuse of a right triangle, and a spiral positioning button is arranged on the slide way; the outer bottom angle of the right triangle is 60 degrees; the hypotenuse of the right triangle is provided with length scale marks from bottom to top; the vertical right-angle sides of the right-angle triangle and the vertical right-angle sides of the isosceles right-angle triangle are connected to form an integral concave quadrilateral structure; the transverse right-angle sides of the right-angle triangle and the transverse right-angle sides of the isosceles right-angle triangle are on the same horizontal line; the bottom of the concave quadrilateral structure is transversely provided with length scale marks from left to right; a semicircular protractor is arranged at the central position of the concave quadrilateral structure; the protractor takes the vertical connection line of the right triangle and the isosceles right triangle as a central symmetry axis; the bottom center position of the protractor is provided with an inserting positioning hole. The multifunctional ruler has the functions of a ruler, a right-angle set square, a protractor and simple compasses, is simple and compact in structure, convenient to use, economical and practical, and worthy of wide popularization.

Description

Multifunctional drawing teaching aid

Technical Field

The utility model relates to the technical field of teaching aids, in particular to a multifunctional drawing teaching aid.

Background

In teaching work and student study, commonly used auxiliary drawing tools comprise a ruler, compasses, a triangle and a protractor; at present, most students and teachers draw by using a traditional single tool, and different drawing tools are often required to be replaced during drawing, so that drawing is very inconvenient, and interest and enthusiasm of students are greatly reduced; therefore, the multifunctional drawing teaching aid is provided to facilitate drawing.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a multifunctional drawing teaching aid.

In order to achieve the purpose, the utility model is realized by the following technical scheme:

a multifunctional drawing teaching aid comprises an isosceles right triangle and a right triangle; the inner side of the bevel edge of the right triangle is provided with a wave-shaped slideway, and the slideway is provided with a spiral positioning button; the outer bottom angle of the right triangle is 60 degrees; the hypotenuse of the right triangle is provided with length scale marks from bottom to top;

the vertical right-angle sides of the right-angle triangle and the vertical right-angle sides of the isosceles right-angle triangle are connected to form an integral concave quadrilateral structure; the transverse right-angle side of the right-angle triangle and the transverse right-angle side of the isosceles right-angle triangle are on the same horizontal line;

the bottom of the concave quadrilateral structure is transversely provided with length scale marks from left to right; a semicircular protractor is arranged at the central position of the concave quadrilateral structure; the protractor takes the vertical connecting line of the right triangle and the isosceles right triangle as a central symmetry axis; and the center of the bottom of the protractor is provided with an inserting positioning hole.

As a further improvement of the utility model, the slideways are arranged in parallel at intervals along the direction of the hypotenuse of the right triangle.

As a further improvement of the utility model, a spiral positioning button is arranged on the slideway.

As a further improvement of the utility model, the screw positioning button comprises a sliding seat and a bolt; the sliding seat is arranged on one outer side of the slideway; a screw rod of the bolt penetrates through the slide way and then is in threaded connection with the slide seat; the clamping and positioning of the spiral positioning button and the slide way are realized through the threaded connection depth of the bolt and the slide seat.

As a further improvement of the utility model, the sliding seat is also provided with a through hole corresponding to the bolt, so that the pen point can be positioned in a penetrating way.

As a further improvement of the utility model, the protractor is a hollow structure on the concave quadrilateral structure.

As a further improvement of the utility model, two ends of the semicircular arc of the protractor are connected with the bottoms of two sides of the concave quadrilateral structure; and angle scale marks are arranged on the semi-circular arc of the protractor.

As a further improvement of the utility model, a plurality of inserting positioning holes are respectively arranged on a horizontal extension line of the bottom end of the protractor from the central position to the outside at equal intervals.

As a further improvement of the utility model, the angle scales at the outer ends of the semicircular arcs of the protractor are in one-to-one correspondence with the bevel edge scales of the right triangle.

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

the multifunctional ruler has the functions of a ruler, a right-angle set square, a protractor and a simple compass, and has the effect of the ruler as scales are marked on one horizontal side of the transverse bottom; two right-angle set squares and a protractor are also arranged; the compass also has the advantages that the central hole for fixing the protractor is used for adjusting the spiral positioning button on the slide way, two pen points can be inserted into the two holes by determining the distance between the two holes, and the compass is simple and compact in structure, convenient to use, economical and practical and worthy of wide popularization.

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, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

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

FIG. 2 is a sectional view of the mounting structure of the screw positioning knob of the present invention;

FIG. 3 is a line segment drawing of the present invention;

FIG. 4 is a schematic angle-halving view of the present invention;

the reference numbers in the figures illustrate:

1. an isosceles right triangle; 2. a right triangle; 3. a slideway; 4. a protractor; 5. inserting the positioning holes; 6. a screw positioning knob; 61. a slide base; 62. a bolt; 7. and (6) inserting the hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. 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.

The utility model provides a multifunctional drawing teaching aid which is combined with accompanying drawings 1 to 4 and aims to solve the technical problem that common drawing tools in the current stage are relatively single in function.

With reference to fig. 1 to 2, specifically, an isosceles right triangle 1 and a right triangle 2 are included; the inner side of the bevel edge of the right triangle 2 is provided with a wave-shaped slideway 3, and the slideway 3 is provided with a spiral positioning button 6; the outer bottom angle of the right triangle 2 is 60 degrees; the hypotenuse of the right triangle 2 is provided with length scale marks from bottom to top;

the vertical right-angle side of the right-angle triangle 2 and the vertical right-angle side of the isosceles right-angle triangle 1 are connected to form an integral concave quadrilateral structure; the transverse right-angle side of the right-angle triangle 2 and the transverse right-angle side of the isosceles right-angle triangle 1 are on the same horizontal line;

the bottom of the concave quadrilateral structure is transversely provided with length scale marks from left to right; a semi-annular protractor 4 is arranged at the central position of the concave quadrilateral structure; the protractor 4 takes the vertical connection line of the right triangle 2 and the isosceles right triangle 1 as a central symmetry axis; and the bottom center of the protractor 4 is provided with a penetration positioning hole 5.

In another embodiment, the slideways 3 are arranged in parallel along the direction of the hypotenuse of the right triangle 2 at intervals.

In another embodiment, a spiral positioning button 6 is arranged on the slideway 3, so that the radius size can be conveniently fixed.

In another embodiment, the screw positioning knob 6 comprises a slide 61 and a bolt 62; the sliding seat 61 is arranged on one outer side of the slideway 3; the screw of the bolt 62 penetrates through the slideway 3 and then is in threaded connection with the sliding seat 61; the clamping and positioning of the screw positioning button 6 and the slideway 3 are realized through the threaded connection depth of the bolt 62 and the sliding seat 61.

Furthermore, the slide base 61 is also provided with a through hole 7 corresponding to the bolt 62, so that the pen point can be inserted and positioned.

In another embodiment, the protractor 4 is a hollow structure on the concave quadrilateral structure; the two ends of the semicircular arc of the protractor 4 are connected with the bottoms of the two sides of the concave quadrilateral structure; and angle scale marks are arranged on the semi-circular arc of the protractor 4.

In another embodiment, a plurality of inserting positioning holes 5 are respectively arranged on a horizontal extension line of the bottom end of the protractor 4 from the central position to the outside at equal intervals; namely, a central small hole is drilled at the intersection point of the horizontal line and the plumb line of the concave quadrilateral structure corresponding to the scale 11, and four penetrating positioning holes 5 are additionally arranged at equal intervals.

In another embodiment, the angle scales at the outer end of the semicircular arc of the protractor 4 are arranged in one-to-one correspondence with the hypotenuse scales of the right triangle 2.

It should be noted that the arc length of the outer end of the semicircular arc of the protractor 4 is equal to the length of the hypotenuse scale of the right triangle 2; the arc length scale numerical values of the outer semi-arc ends of the protractors 4 correspond to the bevel edge scale numerical values of the right-angled triangle 2 one by one; for example, the arc length of the outer end of the protractor 4 corresponding to 0 to 10 ° is equal to the distance between the scale lines of 0 to 10 on the hypotenuse of the right triangle 2.

When the method is specifically implemented, a scientific method for drawing by using a ruler and a ruler is realized; the scientific principles of 'drawing curve into straight', 'equally dividing line segment' and 'equal arc equiangular' are adopted; the ruler and the gauge are used for drawing to realize trisection of line segments and trisection of any angle, the tool can change the limitation of drawing by the ruler and the gauge, and a line segment is randomly divided into equal segments and an angle is randomly divided into equal segments by using the principles of curve transformation into straight, equal arc opposite angles and parallel line equal line segment division; the tool can solve the basic graph of the ruler drawing of junior middle school geometry, has the advantages of convenient operation, convenient use and the like, and can deeply understand several theorems in drawing.

With reference to FIG. 3, the line segment AB is trisected, a ray AC is taken through the point A, AA is respectively intercepted on the AC₁＝A₁A₂＝A₂A₃Is connected with A₃B, forming < AA₃B ═ a °, respectively ═ AA by an angle gauge 4₁B₁＝AA₂B₂Crossing AB at angle a to B₁、B₂Two points, therefore, point B₁Point B₂Is the trisection point of AB.

And (3) trisecting the angle AOB with the attached figure 4, and replacing the function of the compasses by using the performance of the protractor 4. Drawing an angle AOB, coinciding rays OA and a 40-degree line of the protractor, falling rays OB on the radian of the protractor 4, crossing arcs MN with OA and OB at M points and N points, utilizing the principle that the curve is changed into straight, falling the length of the arc MN to the radian corresponding to the hypotenuse of the right triangle 2 of 30 degrees, converting the arc MN into a line segment EF, trisecting the line segment EF by utilizing the tool, wherein the radian corresponding to the trisection of the EF is the intersection point of the trisection lines OC and OD of the angle AOB and the protractor 4 to be C point and D point.

The tool is characterized in that an angle can be divided into three equal parts at will, the corresponding radian on the protractor 4 is converted into the arc length corresponding to the bevel edge of the right-angle triangle through 'curve dividing into straight', the arc length is divided into equal parts through the line segment dividing principle, and finally the equal-divided arbitrary angle is converted through the arc equal-angle principle.

It should be noted that the present application is an integral transparent plastic plate, and a concave quadrangle is formed by the 45 °, 30 ° and 60 ° corners of two right triangles 2; a hollowed protractor 4 is manufactured by taking the small hole as a center; by utilizing the principle that 'curve transformation is straight', the corresponding angles of 0-90 degrees on the protractor 4 are implemented to the bevel edges of the 30-degree triangular plates to be respectively correspondingly marked with radians, an s-shaped slideway 3 is hollowed out at the bevel edge adjacent to the 45-degree triangular plate, and a small slidable plastic circular hole accessory is used on the slideway 3.

In an embodiment, add a screw, nut, T-frame, plumb line, can measure mountain height, building height, flagpole etc. with this instrument, can act as the inclinometer and use, portable, management, it is nimble to use, reasonable in design, compact structure is worth extensively promoting. The student department explores the secret of the graph and interacts with the graph by drawing by hands, so that successful joy is obtained, interest is further stimulated, and a positive self-confident learning attitude is established.

It should be noted that the detailed description of the utility model is not included in the prior art, or can be directly obtained from the market, and the detailed connection mode can be widely applied in the field or daily life without creative efforts, and the detailed description is not repeated here.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A multi-functional drawing teaching aid which characterized in that: comprises an isosceles right triangle and a right triangle; the inner side of the bevel edge of the right triangle is provided with a wave-shaped slideway, and the slideway is provided with a spiral positioning button; the outer bottom angle of the right triangle is 60 degrees; the hypotenuse of the right triangle is provided with length scale marks from bottom to top;

2. A multi-functional drawing teaching aid as claimed in claim 1, wherein: the slide ways are arranged in parallel at intervals along the direction of the hypotenuse of the right triangle.

3. A multi-functional drawing teaching aid as claimed in claim 1, wherein: and the slideway is provided with a spiral positioning button.

4. A multi-functional drawing teaching aid as claimed in claim 3, wherein: the screw positioning button comprises a sliding seat and a bolt; the sliding seat is arranged on one outer side of the slideway; a screw rod of the bolt penetrates through the slide way and then is in threaded connection with the slide seat; the clamping and positioning of the spiral positioning button and the slide way are realized through the threaded connection depth of the bolt and the slide seat.

5. A multi-functional drawing teaching aid as claimed in claim 4, wherein: and the sliding seat is also provided with a through hole corresponding to the bolt, so that the pen point can be positioned in a penetrating way.

6. A multi-functional drawing teaching aid as claimed in claim 1, wherein: the protractor is a hollow structure on the concave quadrilateral structure.

7. A multi-functional drawing teaching aid as claimed in claim 1, wherein: the two ends of the semicircular arc of the protractor are connected with the bottoms of the two sides of the concave quadrilateral structure; and angle scale marks are arranged on the semi-circular arc of the protractor.

8. A multi-functional drawing teaching aid as claimed in claim 1, wherein: and a plurality of inserting positioning holes are respectively arranged on the horizontal extension line of the bottom end of the protractor from the central position to the outside at equal intervals.

9. A multi-functional drawing teaching aid as claimed in claim 1, wherein: the angle scales at the outer ends of the semicircular arcs of the protractor are in one-to-one correspondence with the bevel edge scales of the right triangle.