CN203179343U

CN203179343U - Primary school mathematics teaching aid

Info

Publication number: CN203179343U
Application number: CN 201320133013
Authority: CN
Inventors: 桑逢周
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-03-22
Filing date: 2013-03-22
Publication date: 2013-09-04
Anticipated expiration: 2023-03-22

Abstract

The utility model discloses a primary school mathematics teaching aid. The primary school mathematics teaching aid comprises a first rod and a second rod which are relatively arranged and further comprises a third rod and a fourth rod, the first rod and the second rod internally comprise slide grooves and have same length, first ends are respectively arranged in the slide grooves of the first rod and the second rod, the third rod and the fourth rod can slide in the slide grooves and have same length, a second end of the third rod is connected with a first end of a fifth rod, a second end of the fifth rod is connected with the fourth rod, and a sixth rod is connected between a first end of the first rod and a first end of the second rod. According to the primary school mathematics teaching aid, through rotation of a rotation shaft and sliding of the rods, the teaching aid can dynamically demonstrate a rectangle, a square, a rhombus, a parallelogram, a trapezoid and a triangle; the primary school mathematics teaching aid has a simple structure and low cost, facilitates teaching of pupil mathematics and further has properties of simplicity and visual performance.

Description

A kind of primary school mathematics teaching aid

Technical field

The utility model relates to a kind of teaching aid, is specifically related to a kind of mathematics teaching aid for primary school teaching.

Background technology

At present, in the teaching process of primary school mathematics, often need to use teaching aid to carry out simple, intuitive ground to the pupil and explain, particularly when professor pupil's simple geometric shape, drawing simply on blackboard is unfavorable for pupil's understanding and memory usually.But existing teaching aid relatively disperses, and complex structure, and is with high costs, is unfavorable for promoting the use of, and especially promotes the use of in vast rural area.

Summary of the invention

The utility model is at deficiency of the prior art, primary school mathematics teaching aid a kind of simple in structure, with low cost is provided, can have dynamically demonstrated square, rectangle, rhombus and parallelogram etc., be conducive to the mathematical education to the pupil, have the simple and direct advantage.

The utility model provides a kind of primary school mathematics teaching aid, comprising: be oppositely arranged and in first bar and second bar of chute are arranged, its length is identical; First end lays respectively in the chute of first bar and second bar, and the 3rd bar that can slide in described chute and the 4th bar, and the 3rd bar is identical with the length of the 4th bar; Second end of the 3rd bar removably connects first end of the 5th bar, and second end of the 5th bar removably connects the 4th bar; Be connected with the 6th bar between first end of first bar and second bar, first end.

In above-mentioned teaching aid, the parts of described connection usefulness are rotating rotating shaft.

In an embodiment of above-mentioned teaching aid, the length of described the 6th bar is identical with the length of described the 5th bar.Described the 5th bar with can dismantle the 3rd bar and being connected of the 4th bar.Thereby can demonstrate rectangle.Square, rhombus, parallelogram and triangle etc.

In another embodiment of above-mentioned teaching aid, the adjustable in length of described the 6th bar.In an example, described the 6th bar is elastomeric element.The 8th bar that the 7th bar of part chute and chute that first end is positioned at described the 7th bar is arranged in another example, described the 5th bar comprises and can slide at described chute.By regulating the length of described the 5th bar, and rotating shaft, it is trapezoidal etc. that teaching aid is shown.

The primary school mathematics teaching aid that provides according to the utility model, by the rotation of rotating shaft and the slip of bar, can make teaching aid demonstrate rectangle, square dynamically, rhombus, parallelogram, trapezoidal and triangle etc., simple in structure, with low cost, be conducive to pupil's mathematical education, have the simple and direct advantage.

Description of drawings

Fig. 1 has shown the structural representation according to the teaching aid of an embodiment of the present utility model;

Fig. 2 has shown the deformation pattern of teaching aid shown in Fig. 1;

Fig. 3 has shown the deformation pattern of teaching aid shown in Fig. 1;

Fig. 4 has shown the deformation pattern of teaching aid shown in Fig. 1;

Fig. 5 has shown the structural representation according to another embodiment of the present utility model.

Embodiment

Below in conjunction with accompanying drawing the benzene utility model is further specified.

Fig. 1～4 have shown the teaching aid according to an embodiment of the present utility model, comprise first bar (bar 1) and second bar (bar 2), and its length is identical; First end lays respectively in the chute of bar 1 and bar 2, and the 3rd bar that can slide in described chute (bar 3) and the 4th bar (bar 4), and bar 3 is identical with the length of bar 4; Second end of bar 3 removably connects first end of the 5th bar (bar 5), and second end of bar 5 is connecting link 4 removably, and the length of bar 5 is L ₅Be connected with the 6th bar (bar 6), the length L of described bar 6 between first end of bar 1 and bar 2 first ends ₆The length L of bar 5 ₅=L ₆

The parts that first end of first bar 1 is connected with the 6th bar 6 are rotating shaft 6.1, the parts that first end of described second bar 2 is connected with the 6th bar 6 are rotating shaft 6.2, the parts that second end of the 3rd bar 3 is connected with the 5th bar 5 are that the parts that second end of rotating shaft 5.3, the four bars 4 is connected with the 5th bar 5 are rotating shaft 5.4.

Namely 5.3 distance is made as L to length from first end of bar 1 to second end of bar 3 from rotating shaft 6.1 to rotating shaft ₁₃, namely 5.4 distance is made as L from rotating shaft 6.2 to rotating shaft with the length from first end of bar 2 to second end of bar 4 ₂₄In the chute of first bar 1 and second bar 2, be provided with the locating device (not shown) of symmetry, when bar 3 and bar 4 lay respectively at bar 1 and bar 2 first locating devices (when being positioned at first locating device, bar 3 and bar 4 are not shown), L ₁₃=L ₂₄=L ₆When bar 3 and bar 4 lay respectively at bar 1 and bar 2 second and the 3rd locating device, L ₁₃=L ₂₄＞L ₆When bar 3 and bar 4 lay respectively at bar 1 and bar 2 the 3rd locating device, L ₁₃L when laying respectively at bar 1 and bar 2 second locating devices greater than bar 3 and bar 4 ₁₃

Shown the synoptic diagram according to an embodiment of the present utility model among Fig. 1.Among Fig. 1, when bar 3 and bar 4 lay respectively at bar 1 and bar 2 second locating devices, L ₁₃=L ₂₄＞L ₅=L ₆, be rectangle.When bar 3 and bar 4 lay respectively at bar 1 and bar 2 the 3rd locating device, and rotating shaft 6.1,6.2,5.3 and 5.4, parallelogram obtained.

Fig. 2 has shown the deformation pattern of teaching aid described in Fig. 1, and bar 3 and bar 4 are slided in bar 1 and bar 2 respectively, is located at the first locating device place, even L ₁₃=L ₂₄=L ₅=L ₆, be shown as square.Equidirectional rotating shaft 6.1,6.2,5.3 and 5.4 obtains rhombus shown in Figure 3.

Fig. 4 has shown bar 5 removals among Fig. 3, rotating shaft 6.1 and 6.2, and with rotating shaft 5.3 and 5.4 overlaids, the triangle shown in obtaining.

Fig. 5 has shown the synoptic diagram of teaching aid according to another embodiment of the invention.Bar bar 3 and bar 4 lay respectively at first locating device place, the i.e. L in bar 1 and the bar 2 ₁₃=L ₂₄=L ₆The length L 5 of described bar 5 can be regulated.The 8th bar (bar 8) that has the 7th bar (bar 7) of part chute and first end to be positioned at described chute and can to slide at described chute in described bar 5 comprises is worked as L ₅=L ₆The time, be square; Work as L ₅＞L ₆The time, be the isosceles trapezoid shown in Fig. 5.

Should be noted in the discussion above that above-described embodiment only is used for explaining the utility model, do not constitute any restriction of the present utility model.By the reference exemplary embodiments the utility model being described, is descriptive and explanatory vocabulary but should be understood to wherein used word, rather than limited vocabulary.Can in the scope of the utility model claim, modify the utility model in accordance with regulations, and in not deviating from scope and spirit of the present utility model, the utility model be revised.Although wherein the utility model of Miao Shuing relates to specific shape, structure and embodiment, and do not mean that the utility model is limited to wherein disclosed particular case, on the contrary, the utility model can extend to other, and all have shape and the structure of identical function.

Claims

1. primary school mathematics teaching aid comprises: be oppositely arranged and in first bar and second bar of chute are arranged, its length is identical; First end lays respectively in the chute of first bar and second bar, and the 3rd bar that can slide in described chute and the 4th bar, and the 3rd bar is identical with the length of the 4th bar; Second end of the 3rd bar connects first end of the 5th bar, and second end of the 5th bar connects the 4th bar; Be connected with the 6th bar between first end of first bar and second bar, first end.

2. teaching aid according to claim 1 is characterized in that, the parts of described connection usefulness are rotating rotating shaft.

3. teaching aid according to claim 1 and 2 is characterized in that, the length of described the 6th bar is identical with the length of described the 5th bar.

4. teaching aid according to claim 1 and 2 is characterized in that, described the 5th bar with can dismantle the 3rd bar and being connected of the 4th bar.

4. teaching aid according to claim 1 and 2 is characterized in that, the adjustable in length of described the 6th bar.

5. teaching aid according to claim 4 is characterized in that, described the 6th bar is elastomeric element.

6. teaching aid according to claim 4 is characterized in that, the 8th bar that the 7th bar of part chute and chute that first end is positioned at described the 7th bar is arranged in described the 5th bar comprises and can slide at described chute.