CN208452657U

CN208452657U - A kind of Junior High School Geometry teaching drawing rule

Info

Publication number: CN208452657U
Application number: CN201721874904.2U
Authority: CN
Inventors: 周芸夙
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-12-28
Filing date: 2017-12-28
Publication date: 2019-02-01
Anticipated expiration: 2027-12-28

Abstract

The utility model discloses a kind of Junior High School Geometry teaching drawing rules, including shrinkage-rule, shrinkage-rule includes the first shrinkage-rule and the second shrinkage-rule, the inside of first shrinkage-rule is hollow structure, second shrinkage-rule is nested in the inside of the first shrinkage-rule, the lower section of first shrinkage-rule blade is equipped with semicircle protractor, the upper surface shaft of first shrinkage-rule is connected with the first telescopic rod, shaft is located at the center point of semicircle protractor, the inside of first telescopic rod is hollow structure, first telescopic rod is nested inside with the second telescopic rod, first telescopic rod and the second telescopic rod are threadedly coupled, the free end of second telescopic rod is threaded with connecting rod, connecting rod is equipped with chalk clamp, chalk clamp is equipped with triangle dial plate.The utility model is easy to use, has achieved the purpose that a ruler is multi-purpose, has avoided and forget to carry drawing tool in teaching and the case where can not being normally carried out occur, improve efficiency of teaching；It is designed to that flexible structure is convenient for being stored when not used, it is small in size easy to carry.

Description

A kind of Junior High School Geometry teaching drawing rule

Technical field

The utility model belongs to teaching apparatus for mathematics technical field, is related to a kind of Junior High School Geometry teaching drawing rule.

Background technique

Geometry is course important in mathematical education, is a subject for studying space structure and property, with analysis, algebra Etc. the status with no less important, and relationship is extremely close, and each branch's development of temporary mathematics has geometrization trend, i.e., It is gone to inquire into each mathematical theory with geometrical point and the way of thinking.

When carrying out the teaching of geometry, in order to help student to understand, teacher is often required to draw, especially geometry dotted line The demonstration such as face body angle.Current mathematics drawing teaching aid has the following deficiencies: the teaching aid of (1) existing mapping geometric figure, such as three Gusset, bipod compasses, protractor, number of packages carry difficulty more, and waste of material is big；(2) existing drawing tool function is relatively simple； (3) when explaining the definition of angle, circle etc., a variety of corresponding teaching aids are needed to frequently replace, use is cumbersome, when wasting classroom Between, efficiency of teaching is low；(4) since the effect of gravity can usually generate offset when drawing.

Based on the above reasons, it is necessary to design a kind of Junior High School Geometry and be solved these problems with teaching drawing rule.

Utility model content

The purpose of the utility model is to provide a kind of Junior High School Geometry teaching drawing rules, to solve to mention in above-mentioned background technique Out the problem of.

The utility model stretches the technical scheme adopted is that a kind of Junior High School Geometry teaching drawing rule, including shrinkage-rule Ruler includes the first shrinkage-rule and the second shrinkage-rule, and the inside of the first shrinkage-rule is hollow structure, and the second shrinkage-rule is nested in first The inside of shrinkage-rule, the lower section of the first shrinkage-rule blade are equipped with semicircle protractor, the upper surface shaft connection of the first shrinkage-rule There is the first telescopic rod, shaft is located at the center point of semicircle protractor, and the inside of the first telescopic rod is hollow structure, and first is flexible Bar is nested inside with the second telescopic rod, and the first telescopic rod and the second telescopic rod are threadedly coupled, the free end spiral shell of the second telescopic rod Line is connected with connecting rod, and connecting rod is equipped with chalk clamp, and chalk clamp is equipped with triangle dial plate, and semicircle protractor, first stretch Contracting bar, the second telescopic rod, connecting rod, chalk clamp and triangle dial plate coaxial-symmetrical.

The utility model is also characterized by

Wherein the back side two sides of the first shrinkage-rule are respectively equipped with sucker.

Wherein shrinkage-rule is equipped with the first scale mark, and the semicircle protractor is equipped with the second scale mark.

Wherein the top of shaft is equipped with tape measure.

The beneficial effects of the utility model are: structure is simple, and it is multiple functional, it is easy to use, reach the multi-purpose mesh of a ruler , it can satisfy straight line, circle, arc, the drafting of polygonal figures and the measurement of angle, avoid and forgotten to carry in teaching Drawing tool and there is the case where can not being normally carried out, improve efficiency of teaching, be suitble to large-scale promote and use；It is designed to Flexible structure is small in size easy to carry convenient for being stored when not used.

Detailed description of the invention

Fig. 1 is a kind of main view of Junior High School Geometry teaching drawing rule of the utility model；

Fig. 2 is a kind of rearview of Junior High School Geometry teaching drawing rule of the utility model.

Description of symbols:

1. the first shrinkage-rule, 2. second shrinkage-rules, 3. semicircle protractors, 4. first telescopic rods, 5. second telescopic rods, 6. Connecting rod, 7. chalk clamps, 8. triangle dial plates, 9. suckers, 10. first scale marks, 11. second scale marks, 12. tape measures.

Specific embodiment

With reference to the accompanying drawing, a specific embodiment of the utility model is described in detail, it is to be understood that this The protection scope of utility model is not limited by the specific implementation.

A kind of Junior High School Geometry teaching drawing rule, as depicted in figs. 1 and 2, including shrinkage-rule, shrinkage-rule include first flexible The inside of ruler 1 and the second shrinkage-rule 2, the first shrinkage-rule 1 is hollow structure, and the second shrinkage-rule 2 is nested in the interior of the first shrinkage-rule 1 Portion, the lower section of 1 blade of the first shrinkage-rule are equipped with semicircle protractor 3, and the upper surface shaft of the first shrinkage-rule 1 is connected with first and stretches Contracting bar 4, shaft are located at the center point of semicircle protractor 3, and the inside of the first telescopic rod 4 is hollow structure, the first telescopic rod 4 It is nested inside with the second telescopic rod 5, the first telescopic rod 4 and the second telescopic rod 5 are threadedly coupled, the free end spiral shell of the second telescopic rod 5 Line is connected with connecting rod 6, and connecting rod 6 is equipped with chalk clamp 7, and chalk clamp 7 is equipped with triangle dial plate 8, semicircle protractor 3, First telescopic rod 4, the second telescopic rod 5,8 coaxial-symmetrical of connecting rod 6, chalk clamp 7 and triangle dial plate.

First shrinkage-rule 1 and the second shrinkage-rule 2 are for drawing straight line and polygonal figures.Semicircle protractor 3 is used for Measurement angle.The first telescopic rod 4, the second telescopic rod 5, connecting rod 6 and the chalk clamp 7 of first shrinkage-rule, 1 upper shaft connection cooperate The circle to get up for drawing different radii.Triangle dial plate 8 can read more acurrate in measurement angle.

Wherein the back side two sides of the first shrinkage-rule 1 are respectively equipped with sucker 9.Sucker 9 is for preventing acting on due to gravity The offset generated when drawing.

Wherein shrinkage-rule is equipped with the first scale mark 10, and the semicircle protractor 3 is equipped with the second scale mark 11. Utilize the distance of the first scale mark 10 measurement straight line on shrinkage-rule.Utilize the second scale mark on semicircle protractor 3 11 measurement angles.

Wherein the top of shaft is equipped with tape measure 12.When drawing circle, tape measure 12 can be used for measuring shaft to chalk The distance at 7 centers is pressed from both sides, the accurate radius for determining circle.

In use, with the length of the first shrinkage-rule 1 and the second shrinkage-rule 2 measurement straight line；When measurement angle, shaft is positioned Apex in the angle of required measurement, then adjusting this tool is overlapped the straight flange of semicircle protractor 3 with wherein a line, leads to The first telescopic rod 4 of rotation is crossed, is overlapped it with another a line, angle is read by the second scale mark 11；Bowlder is drawn, it will Shaft is positioned at the center point for needing the circle painted, and the back-out length of the second telescopic rod 5 is then adjusted according to the radius of drawing circle, Chalk is put into chalk clamp 7, rotation connecting rod 6 adjusts the direction of chalk clamp 7, can be drawn by rotating the first telescopic rod 4 Circle；The method for drafting of camber line is the same as the method for drafting for drawing bowlder；The drawing principle of angle with angle measurement, after orientation angle, It only needs to be drawn lines with chalk on the both sides of orientation angle.

In conclusion a kind of Junior High School Geometry provided by the embodiment of the utility model is simple with teaching drawing rule structure, function It is complete, it is easy to use, achieved the purpose that a ruler is multi-purpose, can satisfy straight line, circle, arc, polygonal figures drafting and The measurement of angle avoids and forgets to carry drawing tool in teaching and the case where can not being normally carried out occur, and improves teaching Efficiency is suitble to large-scale popularization and uses；It is designed to that flexible structure is convenient for being stored when not used, carrying side small in size Just.

Disclosed above is only specific embodiment of the utility model, and still, the utility model embodiment is not limited to This, the changes that any person skilled in the art can think of should all fall into the protection scope of the utility model.

Claims

1. a kind of Junior High School Geometry teaching drawing rule, which is characterized in that including shrinkage-rule, the shrinkage-rule includes the first shrinkage-rule (1) and the second shrinkage-rule (2), the inside of first shrinkage-rule (1) is hollow structure, and second shrinkage-rule (2) is nested in The inside of first shrinkage-rule (1), the lower section of the first shrinkage-rule (1) blade are equipped with semicircle protractor (3), and described first stretches The upper surface shaft of reduced scale (1) is connected with the first telescopic rod (4), and the shaft is located at the center point of semicircle protractor (3), institute The inside for stating the first telescopic rod (4) is hollow structure, and first telescopic rod (4) is nested inside with the second telescopic rod (5), institute It states the first telescopic rod (4) and the second telescopic rod (5) is threadedly coupled, the free end of second telescopic rod (5) is threaded with company Extension bar (6), the connecting rod (6) are equipped with chalk clamp (7), and the chalk clamp (7) is equipped with triangle dial plate (8), and described half Round protractor (3), the first telescopic rod (4), the second telescopic rod (5), connecting rod (6), chalk clamp (7) and triangle dial plate (8) Coaxial-symmetrical.

2. a kind of Junior High School Geometry teaching drawing rule as described in claim 1, which is characterized in that first shrinkage-rule (1) Back side two sides be respectively equipped with sucker (9).

3. a kind of Junior High School Geometry as described in claim 1 teaching drawing rule, which is characterized in that the shrinkage-rule is equipped with the One scale mark (10), the semicircle protractor (3) are equipped with the second scale mark (11).

4. a kind of Junior High School Geometry teaching drawing rule as described in claim 1, which is characterized in that the top of the shaft is equipped with Tape measure (12).