CN2290091Y

CN2290091Y - Multipurpose teaching rule

Info

Publication number: CN2290091Y
Application number: CN 97201841
Authority: CN
Inventors: 汤世诰; 汤际桥
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-03-18
Filing date: 1997-03-18
Publication date: 1998-09-02
Anticipated expiration: 2007-03-18

Abstract

The utility model relates to a teaching aid, particularly a visual teaching ruler for combining mathematics. The utility model mainly comprises three long rulers having the same length and four short rulers whose length is the half of the length of the long ruler. A terminal master buckle and a terminal buckle matched with the terminal master buckle are respectively arranged at both ends, and inner master buckles which are the same as the terminal master are arranged on some long and short rulers. Various polygon patterns can be formed. Thus the utility model has the advantages of low cost and convenient carryover.

Description

The multipurpose educational chi

The utility model relates to a kind of teaching aid, especially refers to be combined into the object teaching chi of mathematics.

At present, when the primary school mathematics class is lectured different geometric figures and angle notion thereof, often to directly have different shapes and angle teaching aid, for example: meter ruler, set square, protractor and various polygons etc., number of packages is many, volume is big, carry inconvenience,, can think that also spending is too big especially to the rural elementary school of poverty; Equally, also must standby similar mathematics apparatus for the pupil, number of packages is many, carries inconvenience, also easily loses, even buys this class schooling apparatus for the pupil of poverty-stricken area and also have certain difficulty.

In view of this, the purpose of this utility model provides a kind of multipurpose educational chi, can be combined into different geometric figures and different angles with different simple rulers, both can make large-sized mathematics teaching aid, can make undersized schooling apparatus again.

The purpose of this utility model is achieved in that long ruler that it comprises that three length is identical and length thereof are half four short rulers that length is identical of long ruler, wherein on the two ends of long ruler and short ruler the plane all be respectively equipped with identical end box and with the same terminal button of holding box to match; On a long ruler, be its length also from its terminal button distance

Doubly locate to establish box 5 in, same is its length from its terminal button distance on another root long ruler Doubly locate to establish box in, on a short ruler, locate to establish box in apart from 0.68 times that is its length again from its terminal button, on another root short ruler, locate to establish box in apart from 0.62 times that is its length equally, and be somebody's turn to do interior box and hold box identical from its terminal button.

Above-mentioned end box all is to inlay metal or the elasticity of plastics shrinkage pool that is connected with interior box.

Above-mentioned terminal button is metal or an elasticity of plastics pin of inlaying connection.

Owing to adopt such scheme: cost reduces greatly, easy to carry.

Below in conjunction with drawings and Examples the utility model is further specified.

First kind of long ruler diagrammatic cross-section of Fig. 1 the utility model;

Second kind of long ruler diagrammatic cross-section of Fig. 2 the utility model;

The third long ruler diagrammatic cross-section of Fig. 3 the utility model;

First kind of short ruler diagrammatic cross-section of Fig. 4 the utility model;

Second kind of short ruler diagrammatic cross-section of Fig. 5 the utility model;

The third short ruler diagrammatic cross-section of Fig. 6 the utility model;

Fig. 7 the utility model first embodiment synoptic diagram.

Among the figure; 1, long ruler 2, short ruler 3, end box 4, terminal button 5, interior box

First kind of long ruler 1 (as: long L of chi ₁Be 200mm), as shown in Figure 1, the two ends on plane on this long ruler 1 (near two ends) is provided with an end box 3 and a terminal button 4 respectively; This box 3 is elasticity shrinkage pools, inlays in the through hole that is connected long ruler 1 with elastic sheet metal or plastics, or directly offers the hole on limber long ruler 1; This child button 4 is resilient keys, inlay with the pin of metal or plastics to be connected on the long ruler 1, and this terminal button 4 and end box 3 mutually resilient engagement be connected and take apart.

Second kind of long ruler 1 (as: long L of chi ₁Be 200mm), as shown in Figure 2, except that first kind of long ruler two ends is respectively equipped with end box 3 and terminal button 4, measure with terminal button 4, in this long ruler 1 length The position is established box 5 in (its structure and R cun identical with end box 3) again.

The third long ruler (as: long L of chi ₁Be 200mm), as shown in Figure 3, remove first kind of long ruler, outside two ends are respectively equipped with end box 3 and terminal button 4, measure from terminal button 4, in this long ruler 1 length The position is established box 5 (its structure and size are identical with end box 3) in again.

First kind of short ruler 2 (quantity is two) as shown in Figure 4, its length is long ruler L ₁Half, (as: L ₂=100mm), the two ends on plane on this short ruler 2 (near two ends) is provided with an end box 3 and a terminal button 4 respectively; Its structure is identical with above-mentioned narration, so do not repeat.

Second kind of short ruler 2 as shown in Figure 5, except that first kind of short ruler 2 two ends is respectively equipped with end box 3 and terminal button 4, measures from terminal button 4, in these short ruler 2 length L ₂* 0.68 position is established box 5 in again.

The third short ruler 2 as shown in Figure 6, except that being respectively equipped with end box 3 and the terminal button 4 with first kind of short ruler 2 two ends, measures with terminal button 4, from these short ruler 2 length L ₂* 0.62 place establishes box 5 in again.

Above-mentioned except that first kind of short ruler 2 be two, all the other every kind one, amount to seven rulers, can form various quadrilaterals, (as: rectangle, square, parallelogram, trapezoidal) and triangle (as: equilateral triangle, isosceles triangle and the right-angle triangle at one 30 ℃ of angles is arranged).

In addition, can also utilize the triangle inner edge draw (mensuration) arbitrarily angled, for example:

1. form different right-angle triangles, can draw 90 °, 60 °, 45 ° and 30 ° of angles, the angle that utilization adds again, subtraction can be drawn 15 ° of multiples;

2. form isosceles triangle 40 °, the 70 ° angles of can drawing, utilize add, angle that subtraction can draw 5 ° of multiples; 36 °, the 72 ° angles of can also drawing are utilized the plus-minus method angle of 1 ° and 2 ° etc. of can drawing.

First embodiment, as shown in Figure 7, the upper and lower end, used first kind of short ruler 2 and first kind of long ruler 1 respectively, its oblique waist is with the third long ruler 1, be connected the terminal button 4 of first kind of long ruler 1 and the end box 3 of first kind of short ruler 2 with terminal button 4 with end box 3 respectively, and the terminal button 4 that the right angle waist connects 4, the second kinds of long rulers of terminal button of first kind of short ruler 2 with the interior box 5 of second kind of long ruler 1 connects the end box 3 of first kind of long ruler 1, forms a base angle and be 60 ° right-angled trapezium.

Claims

1, a kind of multipurpose educational chi, it is characterized in that: it comprises that long ruler (1) that three length is identical and length thereof are half the identical short ruler (2) of four length of long ruler (1), wherein on the two ends of long ruler (1) and short ruler (2) plane all be respectively equipped with identical end box (3) and with the same terminal button (4) of holding box (3) to match; Also last at a long ruler (1) is its length from its terminal button (4) distance

Doubly locate to establish box 5 in, equally another root long ruler (1) last from its terminal button (4) apart from being its length

Doubly locate to establish box 5 in, locate to establish box 5 in from its terminal button (4) distance for 0.68 times of its length in that a short ruler (2) is last again, locate to establish box 5 one in from its terminal button (4) distance for 0.62 times of its length in that another root short ruler (2) is last equally, and should in box 5 and hold box (3) identical.

2, by the described multipurpose educational chi of claim 1, it is characterized in that: above-mentioned end box (3) all is to inlay metal or the elasticity of plastics shrinkage pool that is connected with interior box 5.

3, by the described multipurpose educational chi of claim 1, it is characterized in that: above-mentioned terminal button (4) is metal or an elasticity of plastics pin of inlaying connection.