CN2919413Y

CN2919413Y - Multifunctional geometrical figure demonstration realia

Info

Publication number: CN2919413Y
Application number: CN 200620086982
Authority: CN
Inventors: 黄晓明
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-07-13
Filing date: 2006-07-13
Publication date: 2007-07-04
Anticipated expiration: 2016-07-13

Abstract

The utility model relates to a multi-functional geometric figure demonstrating and teaching device. Each extensible pipe is composed of at least two pipes that are connected each other and that one pipe can slides along the axial direction of the pipe and can rotates along the axial line of the pipe. Each extensible pipe is connected with the other extensible pipe in head to tail arrangement, thus forming a closed geometric figure. The teaching device can demonstrate a true figure without any excessive part and can make the students correctly know the geometric figures. When various geometric figures are transformed, the teaching device is easy to be operated without any disassembly and assembly. With the teaching device, various geometric figures can be demonstrated, such as quadrangle, triangle, obtuse angle, right angle, acute angle, bifacial straight line, two similar triangles, two congruent triangles, external angle of a triangle and so on.

Description

Multi-functional geometric figure demonstration teaching aid

Technical field

The utility model relates to a kind of teaching tool, specifically is meant a kind of multi-functional geometric figure demonstration teaching aid.

Background technology

The teacher is in last how much class hours, need demonstrate various geometric figures to the student, traditional method is that the geometric figure that needs are demonstrated is drawn on the blackboard, explain to the student facing to blackboard again, this form of teaching is more stiff, image, lively is used the student to produce easily and is weary of inadequately, and also convenient inadequately for the teacher.

Thus, people have designed the assistant teaching aid that is used for the geometric figure demonstration.A kind of " multi-functional how much teaching aids " are disclosed for Chinese patent CN95238251.2 number, its structure comprises four rulers that have the master scale limit respectively, a bevel protractor, wherein a ruler at one end has dovetail groove in the bottom, the other end has circular hole on the center line of dovetail groove, three rulers at one end have slide opening and wherein two be fixed with two protractors respectively at the other end, the scale limit of the base of two protractors and ruler overlaps, the other end of the ruler of an other band slide opening has a circular hole on the center line of slide opening, two rulers that have protractor, an end of opening slide opening interconnects by screw at slide opening and circular hole place respectively with the ruler of being with slide opening, an end that has two protractors interconnects by screw at dovetail groove and circular hole place with the ruler of being with dovetail groove respectively at the circle centre position of protractor, forms quadrilateral.

This teaching aid can be used for demonstrating parallelogram, rectangle, various quadrilaterals such as trapezoidal, also can be used for demonstrating various triangles.Its shortcoming is that structure is comparatively complicated, and image inadequately during demonstration, because no matter demonstrate which kind of figure, always there is the part of protrusion in its bight, and this has destroyed the student to geometric correct understanding; During desire demonstration triangle, must remove a ruler, using does not have integrality, and not only troublesome poeration is also easily lost the parts of pulling down.

The utility model content

The utility model provides a kind of multi-functional geometric figure demonstration teaching aid, when its fundamental purpose is to overcome existing similar teaching aid demonstration geometric figure inadequately image, use inconvenience, the geometric figure kind that can demonstrate is less and structure shortcoming such as complexity comparatively.

The utility model adopts following technical scheme: multi-functional geometric figure demonstration teaching aid, comprise four draw-tubes, each draw-tube at least by the mutual socket of two joints can relative to endwisely slip along it with can be relative to being the body that rotate at the center with its axis, each draw-tube articulates mutually successively end to end, forms the geometric figure of a sealing.Slide over each other between the 2-section pipe body by relatively rotating between each expansion link, same expansion link and rotate, can make it form various geometric figures.

Aforementioned multi-functional geometric figure demonstration teaching aid, the link of two draw-tubes that it articulates mutually connects by bolt.By this bolt, the degree of tightness of scalable two expansion link junctions is so that relatively rotate or relative fixed two expansion links.

Further, the link of two draw-tubes that it articulates mutually forms a flat connector, and the two flat mutual superimposed backs of connector connect rotationally by described bolt.

By above-mentioned description to the utility model structure as can be known, compare, the utlity model has following advantage with prior art: one, the figure that this teaching aid is demonstrated out is true, and no redundance can make the various geometric figures of the correct understanding of student; Two, between various geometric figures during conversion, operate very easyly, need not to do any dismounting, assembling can be finished; Three, by this teaching aid, can demonstrate various quadrilaterals, various triangle, obtuse angle, right angle, acute angle, different surface beeline, two similar triangles, two congruent triangles, triangle exterior angle or the like various geometric figures, the geometric figure of demonstration is very various.

Description of drawings

Structural representation when Fig. 1 demonstrates common quadrilateral for the utility model;

Fig. 2 demonstrates common structural representation when trapezoidal for the utility model;

Structural representation when Fig. 3 demonstrates parallelogram for the utility model;

Structural representation when Fig. 4 demonstrates rhombus for the utility model;

Structural representation when Fig. 5 demonstrates two similar triangles for the utility model;

Structural representation when Fig. 6 demonstrates triangle for the utility model;

Structural representation when Fig. 7 demonstrates a leg-of-mutton exterior angle for the utility model;

Structural representation when Fig. 8 demonstrates an acute angle for the utility model.

Embodiment

Below with reference to Fig. 1 to Fig. 8 embodiment of the present utility model is described.

With reference to Fig. 1, this multi-functional geometric figure demonstration teaching aid comprises four draw-

tubes

1,2,3,4, each draw-

tube

1,2,3,4 respectively by two the joint mutual socket can relative to endwisely slip along it with can be relative to its axis being the body 11 and 12,21 and 22,31 and 31,41 and 42 that rotate at the center, each draw-

tube

1,2,3,4 articulates mutually by bolt 5,6,7,8 successively end to end, forms the geometric figure of a sealing.The end of each draw-

tube

1,2,3,4 forms flat connector 101 and 102,201 and 202,301 and 302,401 and 402, two flat connectors 102 and 201,202 and 301,302 and 401,402 respectively and is connected rotationally by described bolt 5,6,7,8 respectively after superimposed mutually in twos with 101.

By each

expansion link

1,2,3,4 relatively rotating between any two, slide over each other between the 2-section pipe body 11 and 12 of each

expansion link

1,2,3,4,21 and 22,31 and 31,41 and 42 and rotate the variable various geometric figures that swap out.By this bolt 5,6,7,8, the degree of tightness of the adjacent two expansion link junctions of scalable is so that relatively rotate or relative fixed two expansion links.

Fig. 1 to Fig. 8 has shown the various figures that the conversion of this teaching aid institute goes out, certainly, this teaching aid not merely can be demonstrated these geometric figures of demonstration, for example various quadrilaterals, or even recessed quadrilateral or antarafacial quadrilateral, and various triangles or the like because each expansion link is scalable, between the 2-section pipe body of each expansion link can relative to reverse, two adjacent two expansion links can rotate mutually, therefore, the variable diversified geometric figure that swaps out of this teaching aid.

Above-mentioned only is a specific embodiment of the present utility model, but design concept of the present utility model is not limited thereto, and allly utilizes this design that the utility model is carried out the change of unsubstantiality, all should belong to the behavior of invading the utility model protection domain.

Claims

1, multi-functional geometric figure demonstration teaching aid, it is characterized in that: comprise four draw-tubes, each draw-tube at least by the mutual socket of two joints can relative to endwisely slip along it with can be relative to being the body that rotate at the center with its axis, each draw-tube articulates mutually successively end to end, forms the geometric figure of a sealing.

2, multi-functional geometric figure demonstration teaching aid as claimed in claim 1, it is characterized in that: the link of two draw-tubes of described mutual pivot joint connects by bolt.

3, multi-functional geometric figure demonstration teaching aid as claimed in claim 2, it is characterized in that: the link of two draw-tubes of described mutual pivot joint forms a flat connector, and the two flat mutual superimposed backs of connector connect rotationally by described bolt.